ORCID Profile
0000-0002-6703-477X
Current Organisation
RMIT University
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Nanophotonics | Nanotechnology | Nanomaterials | Functional Materials | Materials Engineering | Nanomanufacturing | Optical Physics | Nonlinear optics and spectroscopy | Catalysis and Mechanisms of Reactions | Nanofabrication, Growth and Self Assembly | Renewable Power and Energy Systems Engineering (excl. Solar Cells) | Electronic and magnetic properties of condensed matter; superconductivity | Atomic molecular and optical physics | Materials engineering | Photodetectors, Optical Sensors and Solar Cells | Nanofabrication growth and self assembly | Functional materials | Photonics optoelectronics and optical communications | Condensed matter characterisation technique development | Manufacturing Robotics and Mechatronics (excl. Automotive Mechatronics) | Manufacturing Engineering | Manufacturing Processes and Technologies (excl. Textiles) | Metals and Alloy Materials | Composite and Hybrid Materials | Photonics, Optoelectronics and Optical Communications | Nonlinear Optics and Spectroscopy | Atomic molecular and optical physics not elsewhere classified | Optics And Opto-Electronic Physics | Condensed Matter Physics—Structural Properties | Optical And Photonic Systems | Astronomical instrumentation | Energy Generation, Conversion and Storage Engineering | Photonic and electro-optical devices sensors and systems (excl. communications) | Electronics sensors and digital hardware |
ANZSRC Socio-Economic Objective (SEO)
Scientific Instruments | Expanding Knowledge in Engineering | Energy Storage (excl. Hydrogen) | Environmentally Sustainable Energy Activities not elsewhere classified | Expanding Knowledge in Technology | Management of Greenhouse Gas Emissions from Mineral Resource Activities | Education and Training Systems not elsewhere classified | Physical sciences | Horticultural Crops not elsewhere classified | Industrial Machinery and Equipment | Coated Metal and Metal-Coated Products | Energy Storage, Distribution and Supply not elsewhere classified | Manufacturing not elsewhere classified | Scientific instrumentation | Hydrogen Production from Renewable Energy | Environmentally Sustainable Information and Communication Services not elsewhere classified | Solar-Thermal Energy | Solar-Photovoltaic Energy | Expanding Knowledge in the Chemical Sciences | Expanding Knowledge in the Physical Sciences | Communication equipment not elsewhere classified
Related Links
Publications
Triggering a Self-Sustaining Reduction of Graphenes Oxide for High-Performance Energy Storage Devices
Publisher: American Chemical Society (ACS)
Date: 19-08-2020
Integrated Electrode‐Electrolyte Optimization to Manufacture a Real‐Life Applicable Aqueous Supercapacitor with Record‐Breaking Lifespan
Publisher: Wiley
Date: 28-02-2023
DOI: 10.1002/EEM2.12520
Abstract: Aqueous supercapacitors (SCs) have been regarded as a promising candidate for commercial energy storage device due to their superior safety, low cost, and environmental benignity. Unfortunately, an age‐old challenge of achieving both long electrode lifespan and qualified energy‐storage property blocks their practical application. Herein, we develop an electrode‐electrolyte integrated optimization strategy to fulfill the real‐life device requirements. Electrode optimization simultaneously regulates the nanomorphology and surface chemistry of the tungsten oxide anode, resulting in superior electrochemical performance given by an ideal “bird‐nest” structure with optimal oxygen vacancy status the anodes interact with and are protected from dissolution and structural collapse by the rationally designed hybrid electrolyte with optimized pH and facilitated cation desorption behavior. Collaboratively, a record‐breaking durability of no capacitive decay after 250 000 cycles is achieved. On the basis of this integrated optimization, the first aqueous pouch SCs with real‐life practicability were manufactured by a soft‐package encapsulation technique, which can steadily power commercial 3 C products such as tablets and smartphones and maintain safely working against extreme conditions. This work demonstrates the possibility of using aqueous energy storage devices with enhanced safety and lower cost to replace the commercial organic counterparts for wide range of daily applications.
Concept to devices: from plasmonic light trapping to upscaled plasmonic solar modules [Invited]
Publisher: The Optical Society
Date: 06-2013
DOI: 10.1364/PRJ.1.000022
On-Demand Design of Tunable Complete Photonic Band Gaps based on Bloch Mode Analysis
Publisher: Springer Science and Business Media LLC
Date: 24-09-2018
DOI: 10.1038/S41598-018-32422-1
Abstract: The fundamental property of photonic crystals is the band gap effect, which arises from the periodic dielectric modulation of electromagnetic waves and plays an indispensable role in manipulating light. Ever since the first photonic-bandgap structure was discovered, the ability to tune its bandgap across a wide wavelength range has been highly desirable. Therefore, obtaining photonic crystals possessing large on-demand bandgaps has been an ever-attractive study but has remained a challenge. Here we present an analytical design method for achieving high-order two-dimensional photonic crystals with tunable photonic band gaps on-demand. Based on the Bloch mode analysis for periodic structures, we are able to determine the geometric structure of the unit cell that will realize a nearly optimal photonic band gap for one polarization between the appointed adjacent bands. More importantly, this method generates a complete bandgap for all polarizations, with frequencies tuned by the number of photonic bands below the gap. The lowest dielectric contrast needed to generate a photonic band gap, as well as conditions for generating complete bandgaps, are investigated. Our work first highlights the systematic approach to complete photonic band gaps design based on Bloch mode analysis. The physical principles behind our work are then generalized to other photonic lattices.
Focused evanescent field under radially polarized beam illumination
Publisher: IEEE
Date: 2005
Third-Order Optical Nonlinearities of 2D Materials at Telecommunications Wavelengths
Publisher: MDPI AG
Date: 25-01-2023
DOI: 10.3390/MI14020307
Abstract: All-optical signal processing based on nonlinear optical devices is promising for ultrafast information processing in optical communication systems. Recent advances in two-dimensional (2D) layered materials with unique structures and distinctive properties have opened up new avenues for nonlinear optics and the fabrication of related devices with high performance. This paper reviews the recent advances in research on third-order optical nonlinearities of 2D materials, focusing on all-optical processing applications in the optical telecommunications band near 1550 nm. First, we provide an overview of the material properties of different 2D materials. Next, we review different methods for characterizing the third-order optical nonlinearities of 2D materials, including the Z-scan technique, third-harmonic generation (THG) measurement, and hybrid device characterization, together with a summary of the measured n2 values in the telecommunications band. Finally, the current challenges and future perspectives are discussed.
Graphene Oxide for Integrated Photonics and Flat Optics
Publisher: Wiley
Date: 12-2020
Abstract: With superior optical properties, high flexibility in engineering its material properties, and strong capability for large‐scale on‐chip integration, graphene oxide (GO) is an attractive solution for on‐chip integration of 2D materials to implement functional integrated photonic devices capable of new features. Over the past decade, integrated GO photonics, representing an innovative merging of integrated photonic devices and thin GO films, has experienced significant development, leading to a surge in many applications covering almost every field of optical sciences such as photovoltaics, optical imaging, sensing, nonlinear optics, and light emitting. This paper reviews the recent advances in this emerging field, providing an overview of the optical properties of GO as well as methods for the on‐chip integration of GO. The main achievements made in GO hybrid integrated photonic devices for erse applications are summarized. The open challenges as well as the potential for future improvement are also discussed.
Observation of Third-order Nonlinearities in Graphene Oxide Film at Telecommunication Wavelengths
Publisher: Springer Science and Business Media LLC
Date: 29-08-2017
DOI: 10.1038/S41598-017-09583-6
Abstract: All-optical switches have been considered as a promising solution to overcome the fundamental speed limit of the current electronic switches. However, the lack of a suitable third-order nonlinear material greatly hinders the development of this technology. Here we report the observation of ultrahigh third-order nonlinearity about 0.45 cm 2 /GW in graphene oxide thin films at the telecommunication wavelength region, which is four orders of magnitude higher than that of single crystalline silicon. Besides, graphene oxide is water soluble and thus easy to process due to the existence of oxygen containing groups. These unique properties can potentially significantly advance the performance of all-optical switches.
Ultralong free-standing single crystal perovskite microwires with extremely low dark current
Publisher: Research Square Platform LLC
Date: 16-06-2021
DOI: 10.21203/RS.3.RS-629456/V1
Abstract: Super long perovskite microwires (PMWs) are in a great demand in many fields such as low-loss microcables and integrated optical waveguide. Despite decades of research into PMWs, single crystal PMWs with several centimeters long have not been obtained. Here, ultralong (up to 7.6 centimeters) monoclinic crystal structure CH3NH3PbI3·DMF PMWs have been synthesized. The high-quality microwire exhibits long carrier lifetime of 1775.7 ns. The as-prepared free-standing PMWs can be integrated to any arbitrary substrate and 808 nm near-infrared photodetectors have been successfully demonstrated. The fabricated device shows a high light on/off ratio of 1.79×106 and an extremely low dark current of 2.5 fA at 1 V bias. This work provides a strategy for the solution growth of ultralong microwires.
Anomalous phenomenon of a focused evanescent Laguerre-Gaussian beam
Publisher: Optica Publishing Group
Date: 2005
Abstract: We demonstrate theoretically and experimentally an anomaly in the intensity distribution at the focal region of a Laguerre-Gaussian beam, when such a beam is focused by a high numerical aperture objective lens through an index-mismatched interface satisfying the total internal reflection condition. An asymmetric rotation of the focal field arising from the interplay of the phase shift induced by the total internal reflection and the helical phase of the Laguerre-Gaussian beam has been experimentally observed by a scanning near-field optical microscope. A cross-section analysis shows that the experimental results match well with the theoretical predictions.
All-optical vectorial control of multistate magnetization through anisotropy-mediated spin-orbit coupling
Publisher: Walter de Gruyter GmbH
Date: 26-09-2019
Abstract: The interplay between light and magnetism is considered as a promising solution to fully steer multidimensional magnetic oscillations/vectors, facilitating the development of all-optical multilevel recording/memory technologies. To date, impressive progress in multistate magnetization instead of a binary level has been witnessed by primarily resorting to double laser beam excitation. Yet, the control mechanisms are limited to specific magnetic medium or intricate optical configuration as well as overlooking the crystallographic architecture of the media and the polarization-phase linkage of the light fields. Here, we theoretically present a novel all-optical strategy for generating arbitrary multistate magnetization through the inverse Faraday effect. This is achieved by strongly focusing a single vortex-phase configured beam with circular polarization onto the anisotropic magnetic medium. By judiciously tuning the topological charge effect, the optical anisotropic effect, and the anisotropic optomagnetic effect, the light-induced magnetic vector can be flexibly redistributed between its transverse and longitudinal components, thus enabling orientation-unlimited multilevel magnetization control. In this optomagnetic process, we also reveal the role of anisotropy-mediated spin-orbit coupling, another physical mechanism that enables the effective translation of the angular momentum of light fields to the magnetic system. Furthermore, the conceptual paradigm of all-optical multistate magnetization is verified. Our findings show great prospect in multidimensional high-density optomagnetic recording and memory devices and also in high-speed information processing science and technology.
Two-dimensional Phononic Crystal Design with Large Band Gaps
Publisher: OSA
Date: 2017
Realization of multidimensional sound propagation in 3D acoustic higher-order topological insulator
Publisher: AIP Publishing
Date: 12-10-2020
DOI: 10.1063/5.0023033
Abstract: Higher-order topological insulators (TIs) develop the conventional bulk-boundary correspondence theory and increase the interest in searching innovative topological materials. To realize a higher-order TI with a wide passband of one-dimensional (1D) and two-dimensional (2D) transportation modes, we design three-dimensional non-trivial and trivial sonic crystals whose combination mimics the Su–Schrieffer–Heeger model. The topological boundary states can be found at the interfaces, including the zero-dimensional corner state, 1D hinge state, and 2D surface state. The fabricated s le with the bent two-dimensional and one-dimensional acoustic channels exhibits the multidimensional sound propagation and verifies the mode transition among the complete bandgap, hinge mode, and surface mode. The bandwidth of the single-mode hinge state achieves a large relative bandwidth of 9.1% in which sound transports one-dimensionally without significant leak into the surfaces or the bulk. The higher-order topological states in the study pave the way for sound manipulation in multiple dimensions.
Pulse‐potential electrochemistry to boost real‐life application of pseudocapacitive dual‐doped polypyrrole
Publisher: Wiley
Date: 29-04-2022
DOI: 10.1002/SMM2.1116
Abstract: Polypyrrole (PPy) is a very promising pseudocapacitive electrode material for supercapacitors. However, the poor electrochemical performances and cycling stability caused by volumetric change and counterion drain severely limited its practical application and commercialization. Herein, we present a pulse‐potential polymerization strategy for uniformly depositing a dual‐doped PPy with ordered and shorter molecular structure by balancing the concentration polarization. Such a strategy ensures more homogeneous stress distribution of PPy during ultralong cycling tests and improves the cycle stability. Moreover, the pulse‐potential polymerized PPy with dual anion doping behavior induces enhanced protonation level and improved electrical conductivity, which boosting the charge transfer kinetics. Therefore, the as‐synthesized PPy exhibits a remarkable capacitance performance (7250 mF/cm 2 @ 3 mA/cm 2 ), outstanding rate capability (3073 mF/cm 2 @ 200 mA/cm 2 ) and a long cycle life. The assembled symmetric and asymmetric supercapacitors (ASC) exhibit good energy densities (0.8 mWh/cm 2 for ASC and 0.5 mWh/cm 2 for symmetric supercapacitor), and excellent durability with zero capacitive loss after 35,000 cycles. In addition, we have fabricated small pouch devices, which can effectively operate a variety of electronic products (including the high‐voltage 5 V smartphone, and tablet) and well withstand the external extreme tests during operation, demonstrating the quantitative investigation of the real‐life application of aqueous supercapacitors.
Screening for Posttraumatic Stress Disorder in Children After Accidental Injury
Publisher: American Academy of Pediatrics (AAP)
Date: 09-2006
Abstract: OBJECTIVE. Children who have experienced an accidental injury are at increased risk of developing posttraumatic stress disorder. It is, therefore, essential that strategies are developed to aid in the early identification of children at risk of developing posttraumatic stress disorder symptomatology after an accident. The aim of this study was to examine the ability of the Child Trauma Screening Questionnaire to predict children at risk of developing distressing posttraumatic stress disorder symptoms 1 and 6 months after a traumatic accident. METHODS. Participants were 135 children (84 boys and 51 girls with their parents) who were admitted to the hospital after a variety of accidents, including car- and bike-related accidents, falls, burns, dog attacks, and sporting injuries. The children completed the Child Trauma Screening Questionnaire and the Children's Impact of Events Scale within 2 weeks of the accident, and the Anxiety Disorders Interview Schedule for Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Child Version, was conducted with the parents to assess full and subsyndromal posttraumatic stress disorder in their child 1 and 6 months after the accident. RESULTS. Analyses of the results revealed that the Child Trauma Screening Questionnaire correctly identified 82% of children who demonstrated distressing posttraumatic stress disorder symptoms (9% of s le) 6 months after the accident. The Child Trauma Screening Questionnaire was also able to correctly screen out 74% of children who did not demonstrate such symptoms. Furthermore, the Child Trauma Screening Questionnaire outperformed the Children's Impact of Events Scale. CONCLUSIONS. The Child Trauma Screening Questionnaire is a quick, cost-effective and valid self-report screening instrument that could be incorporated in a hospital setting to aid in the prevention of childhood posttraumatic stress disorder after accidental trauma.
What's driving the binge in binge eating disorder?: A prospective examination of precursors and consequences
Publisher: Wiley
Date: 2007
DOI: 10.1002/EAT.20352
Abstract: Previous research, mostly using retrospective reports, indicated a relation of negative affect and dietary restraint with the occurrence of binge episodes in binge eating disorder (BED). We employed Ecological Momentary Assessment (EMA) to better understand precursors and consequences of binge eating. Thirty-three females with BED carried a handheld computer for 7 days, and were periodically prompted to indicate their current emotions, hunger, and binge status. Negative mood and hunger were significantly higher at prebinge than at nonbinge times, but negative mood was even higher at postbinge. Participants attributed binge episodes to mood more frequently than to hunger or abstinence violation. The finding that negative mood is actually heightened subsequent to a binge suggests the need to further investigate what is reinforcing about a binge, including possible escape from self-awareness. Strengths of EMA technology are discussed, as well as its broad utility in BED assessment and treatment.
Compensation claim lodgement and health outcome developmental trajectories following whiplash injury: A prospective study
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 07-2010
DOI: 10.1016/J.PAIN.2010.02.013
Abstract: This study aimed to identify distinctive trajectories for pain/disability and posttraumatic stress disorder (PTSD) symptoms following whiplash injury and to examine the effect of injury compensation claim lodgement on the trajectories. In a prospective study, 155 in iduals with whiplash were assessed at <1month, 3, 6 and 12months post injury. Outcomes at each time point were Neck Disability Index (NDI) and the Posttraumatic Stress Diagnostic Scale (PDS). Group-based trajectory analytical techniques were used to identify outcome profiles. The analyses were then repeated after including third party compensation claim lodgment as a binary time-changing covariate. Three distinct NDI trajectories were determined: (1) Mild: mild or negligible pain/disability for the entire 12 months (45%), (2) Moderate: initial moderate pain/disability that decreased to mild levels by 3 months (39%) and (3) Chronic-severe: severe pain/disability persisting at moderate/severe levels for 12 months (16%). Three distinct PTSD trajectories were also identified: (1) Resilient: mild symptoms throughout (40%), (2) Recovering: initial moderate symptoms declining to mild levels by 3months (43%) and (3) Chronic moderate-severe: persistent moderate/severe symptoms throughout 12 months (17%). Claim submission had a detrimental effect on all trajectories (p<0.001) except for the Chronic-severe NDI trajectory (p=0.098). Following whiplash injury, there are distinct pathways of recovery for pain/ disability and PTSD symptoms. Management of whiplash should consider the detrimental association of compensation claim with psychological recovery and recovery of those with mild to moderate pain/disability levels. However, claim lodgement has no significant association with a more severe pain and disability trajectory.
Redox-etching induced porous carbon cloth with pseudocapacitive oxygenic groups for flexible symmetric supercapacitor
Publisher: Elsevier BV
Date: 2022
Electrocatalytic Water Splitting: From Harsh and Mild Conditions to Natural Seawater
Publisher: Wiley
Date: 08-12-2021
Abstract: Electrocatalytic water splitting is regarded as the most effective pathway to generate green energy—hydrogen—which is considered as one of the most promising clean energy solutions to the world's energy crisis and climate change mitigation. Although electrocatalytic water splitting has been proposed for decades, large‐scale industrial hydrogen production is hindered by high electricity cost, capital investment, and electrolysis media. Harsh conditions (strong acid/alkaline) are widely used in electrocatalytic mechanism studies, and excellent catalytic activities and efficiencies have been achieved. However, the practical application of electrocatalytic water splitting in harsh conditions encounters several obstacles, such as corrosion issues, catalyst stability, and membrane technical difficulties. Thus, the research on water splitting in mild conditions (neutral/near neutral), even in natural seawater, has aroused increasing attention. However, the mechanism in mild conditions or natural seawater is not clear. Herein, different conditions in electrocatalytic water splitting are reviewed and the effects and proposed mechanisms in the three conditions are summarized. Then, a comparison of the reaction process and the effects of the ions in different electrolytes are presented. Finally, the challenges and opportunities associated with direct electrocatalytic natural seawater splitting and the perspective are presented to promote the progress of hydrogen production by water splitting.
Boosting the electrical and mechanical properties of structural dielectric capacitor composites via gold nanoparticle doping
Publisher: Elsevier BV
Date: 12-2019
A small change in the local atomic environment for a big improvement in single-atom catalysis
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0TA10823E
Abstract: Guided by density functional theory calculations, we successfully synthesized a new Ru single-atom catalyst supported on moderately oxidized Cu with outstanding electrocatalytic performance for ammonia synthesis.
Significant light absorption enhancement in silicon thin film tandem solar cells with metallic nanoparticles
Publisher: IOP Publishing
Date: 04-04-2016
DOI: 10.1088/0957-4484/27/19/195401
Abstract: Enhancing the light absorption in microcrystalline silicon bottom cell of a silicon-based tandem solar cell for photocurrent matching holds the key to achieving the overall solar cell performance breakthroughs. Here, we present a concept for significantly improving the absorption of both subcells simultaneously by simply applying tailored metallic nanoparticles both on the top and at the rear surfaces of the solar cells. Significant light absorption enhancement as large as 56% has been achieved in the bottom subcells. More importantly the thickness of the microcrystalline layer can be reduced by 57% without compromising the optical performance of the tandem solar cell, providing a cost-effective strategy for high performance tandem solar cells.
Towards ultra-thin plasmonic silicon wafer solar cells with minimized efficiency loss
Publisher: Springer Science and Business Media LLC
Date: 13-05-2014
DOI: 10.1038/SREP04939
Highly nonlinear BiOBr nanoflakes for hybrid integrated photonics
Publisher: AIP Publishing
Date: 09-4200
DOI: 10.1063/1.5116621
Abstract: We investigate the nonlinear optical properties of BiOBr nanoflakes—a novel two-dimensional (2D) layered material from the bismuth oxyhalide family. We measure the nonlinear absorption and Kerr nonlinearity of BiOBr nanoflakes at both 800 nm and 1550 nm via the Z-Scan technique. We observe a large nonlinear absorption coefficient β ∼ 10−7 m/W as well as a large Kerr coefficient n2 ∼ 10−14 m2/W. We also observe strong dispersion in n2, with it reversing sign from negative to positive as the wavelength varies from 800 nm to 1550 nm. In addition, we characterize the thickness-dependence of the nonlinear optical properties of BiOBr nanoflakes, observing that both the magnitudes of β and n2 increase for very thin flakes. Finally, we integrate BiOBr nanoflakes onto silicon integrated waveguides and characterize the linear optical properties of the resulting hybrid integrated devices, with the measurements agreeing with calculated parameters using independent ellipsometry measurements. These results verify the strong potential of BiOBr as an advanced nonlinear optical material for high-performance hybrid integrated photonic devices.
Physical and psychological factors predict outcome following whiplash injury
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 03-2005
DOI: 10.1016/J.PAIN.2004.12.005
Abstract: Predictors of outcome following whiplash injury are limited to socio-demographic and symptomatic factors, which are not readily amenable to secondary and tertiary intervention. This prospective study investigated the predictive capacity of early measures of physical and psychological impairment on pain and disability 6 months following whiplash injury. Motor function (ROM kinaesthetic sense activity of the superficial neck flexors (EMG) during cranio-cervical flexion), quantitative sensory testing (pressure, thermal pain thresholds, brachial plexus provocation test), sympathetic vasoconstrictor responses and psychological distress (GHQ-28, TSK, IES) were measured in 76 acute whiplash participants. The outcome measure was Neck Disability Index scores at 6 months. Stepwise regression analysis was used to predict the final NDI score. Logistic regression analyses predicted membership to one of the three groups based on final NDI scores ( 30 moderate/severe pain and disability). Higher initial NDI score (1.007-1.12), older age (1.03-1.23), cold hyperalgesia (1.05-1.58), and acute post-traumatic stress (1.03-1.2) predicted membership to the moderate/severe group. Additional variables associated with higher NDI scores at 6 months on stepwise regression analysis were: ROM loss and diminished sympathetic reactivity. Higher initial NDI score (1.03-1.28), greater psychological distress (GHQ-28) (1.04-1.28) and decreased ROM (1.03-1.25) predicted subjects with persistent milder symptoms from those who fully recovered. These results demonstrate that both physical and psychological factors play a role in recovery or non-recovery from whiplash injury. This may assist in the development of more relevant treatment methods for acute whiplash.
Effect of water on the rheology of the lithospheric mantle in young extensional basin systems as shown by xenoliths from the Carpathian-Pannonian region
Publisher: Elsevier BV
Date: 2021
Entire band absorption enhancement in double-side textured ultrathin solar cells by nanoparticle imprinting
Publisher: AIP Publishing
Date: 09-06-2015
DOI: 10.1063/1.4922496
Abstract: Entire band light management is crucial for amorphous silicon (a-Si) solar cells, especially when the absorbing layer becomes ultrathin. Here, we propose and demonstrate a double-side texture strategy to effectively manage light in ultrathin solar cells via a simple and scalable nanoparticle imprinting technique. SiO2 nanoparticles are half embedded into the top surface of the solar cells to introduce the double-side texture. Using a solar cell with a 150 nm thick a-Si layer as an ex le, we observe significant enhancement over the entire absorption band of a-Si both theoretically and experimentally. A maximum short circuit current density enhancement as high as 43.9% has been achieved experimentally compared with a flat solar cell.
Active three-dimensional photonic crystals with high third-order nonlinearity in telecommunication
Publisher: IEEE
Date: 08-2009
Rectangular-cavity resonances enhanced absorption in metallic-nanoshelled 2D rod arrays and 3D photonic crystals
Publisher: IOP Publishing
Date: 04-2010
Enhanced Kerr optical nonlinearity of integrated waveguides incorporating layered GO films
Publisher: SPIE
Date: 30-12-2019
DOI: 10.1117/12.2540379
Direct visualization of focusing effect of step corrugated nanoplasmonic slits
Publisher: IEEE
Date: 08-2009
Free chargesversusexcitons: photoluminescence investigation of InGaN/GaN multiple quantum well nanorods and their planar counterparts
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7NR07567G
Abstract: Photoexcited carriers are mainly excitons in InGaN/GaN multiple quantum well planar layers while free electron holes are greatly increased in nanorods.
Graphene Metamaterial for High Absorption of Unpolarized Light over More Than Three Octaves of Bandwidth
Publisher: IEEE
Date: 06-2019
Main group metal elements for ambient-condition electrochemical nitrogen reduction
Publisher: Elsevier BV
Date: 11-2021
Enhanced four-wave mixing efficiency in silicon-graphene oxide hybrid waveguides
Publisher: OSA
Date: 2017
Material challenges in green hydrogen ecosystem
Publisher: Elsevier BV
Date: 11-2023
Advanced Catalytic and Electrocatalytic Performances of Polydopamine‐Functionalized Reduced Graphene Oxide‐Palladium Nanocomposites
Publisher: Wiley
Date: 31-08-2016
Template-Free Synthesis of High-Yield Fe-Doped Cesium Lead Halide Perovskite Ultralong Microwires with Enhanced Two-Photon Absorption
Publisher: American Chemical Society (ACS)
Date: 06-08-2018
DOI: 10.1021/ACS.JPCLETT.8B02127
Abstract: Doping in perovskite is challenging and competitive due to the inherently fast growth mechanism of perovskite structure. Here, we demonstrate successful synthesis of high-yield Fe-doped cesium lead halide perovskite ultralong microwires (MWs) that have diameters up to ∼5 μm and lengths up to millimeters via an antisolvent vapor-assisted template-free method. Microstructure characterization confirms the uniformly doped Fe in the high-quality crystal perovskite MWs. Significantly, doping the Fe(III) concentration can affect both the MW morphology and photoluminescence (PL). The band edge emission of the MW at variable excitation has been accounted for by the superposition and combination of optical transitions of nearby singlet, triplet, and magnetic polaronic excitons. High-quality two-photon PL emission and the enhanced nonlinear absorption coefficient of Fe-doped MWs have been experimentally demonstrated. This superhigh nonlinear absorption coefficient and high-quality optical properties endow it with promising applications in spin-related optical switching and optical limiting devices.
Coupling Adsorbed Evolution and Lattice Oxygen Mechanism in Fe‐Co(OH)2/Fe2O3 Heterostructure for Enhanced Electrochemical Water Oxidation
Publisher: Wiley
Date: 09-2023
Directing Charge Transfer in a Chemical‐Bonded BaTiO3@ReS2 Schottky Heterojunction for Piezoelectric Enhanced Photocatalysis
Publisher: Wiley
Date: 07-06-2022
Abstract: The piezo‐assisted photocatalysis system, which can utilize solar energy and mechanical energy simulteneously, is promising but still challenging in the environmental remediation field. In this work, a novel metal–semiconductor BaTiO 3 @ReS 2 Schottky heterostructure is designed and it shows high‐efficiency on piezo‐assisted photocatalytic molecular oxygen activation. By combining experiment and calculation results, the distorted metal‐phase ReS 2 nanosheets are found to be closely anchored on the surface of the BaTiO 3 nanorods, through interfacial ReO covalent bonds. The Schottky heterostructure not only forms electron‐transfer channels but also exhibits enhanced oxygen activation capacity, which are helpful to produce more superoxide radicals. The polarization field induced by the piezoelectric BaTiO 3 can lower the Schottky barrier and thus reduce the transfer resistance of photogenerated electrons directing to the ReS 2 . As a result of the synergy effect between the two components, the BaTiO 3 @ReS 2 exhibits untrahigh activity for degradation of pollutants with an apparent rate constant of 0.133 min −1 for piezo‐assisted photocatalysis, which is 16.6 and 2.44 times as that of piezocatalysis and photocatalysis, respectively. This performance is higher than most reported BaTiO 3 ‐based piezo‐assisted photocatalysis systems. This work paves the way for the design of high‐efficiency piezo‐assisted photocatalytic materials for environmental remediation through using green energies in nature.
FAST Search for Circumstellar Atomic Hydrogen. I. The Young Planetary Nebula IC 4997
Publisher: American Astronomical Society
Date: 28-06-2022
Abstract: Using the Five-hundred-meter Aperture Spherical radio Telescope in Guizhou, China, we detect the 21 cm neutral atomic hydrogen absorption in the young planetary nebula IC 4997. The absorption arises from a shell that is also associated with Na i D lines. The H i shell has a mass of 1.46 × 10 −2 M ⊙ and a dynamic age of 990 yr. The column density of H i is estimated to be 7.1 × 10 20 cm −2 , which can be well explained in terms of a photodissociation region around the ionized nebula, limited by the self-shielding of H 2 . We find that the atomic-to-ionized hydrogen ratio is 0.6, suggesting that H i substantially contributes to the overall nebular mass.
Broadband angular momentum cascade via a multifocal graphene vortex generator
Publisher: Shanghai Institute of Optics and Fine Mechanics
Date: 2022
Fabrication of three-dimensional woodpile photonic crystals in a PbSe quantum dot composite material
Publisher: Optica Publishing Group
Date: 2006
DOI: 10.1364/OE.14.010740
Abstract: Incorporating active media into three-dimensional (3D) photonic crystals (PCs) is a useful step towards exploring the functionalities of PCs. Here we report, for the first time, on the fabrication of 3D woodpile PCs with a commercial PbSe quantum dot (QD) composite material by using the two-photon polymerization technique. The fabricated crystals possess photonic band gaps in the near-infrared wavelength region, which have a suppression rate of ~50% in the stacking direction, measured with an angle-resolved Fourier-transform infrared spectrometer. The woodpile structures fabricated under different conditions are also characterized by using a scanning near-field optical microscope, providing a useful feedback towards optimizing the fabrication of 3D woodpile PCs in QD composites.
Three-dimensional super-resolution longitudinal magnetization spot arrays
Publisher: Springer Science and Business Media LLC
Date: 03-2017
DOI: 10.1038/LSA.2017.32
Three‐In‐One Alkylamine‐Tuned MoOx for Lab‐Scale to Real‐Life Aqueous Supercapacitors
Publisher: Wiley
Date: 08-03-2022
Abstract: Aqueous supercapacitors show advantages of high safely, prolonged lifespan, and low cost, etc. but there have never been commercial market products, nor quantitative investigation of practical pouch devices of aqueous supercapacitors. Herein, to achieve their lab‐scale to real‐life manufacture, a unique MoO x for supercapacitor use is constructed by a hydrothermal and annealing strategy suitable for industrialization, which plays three key functions, including precisely adjusted interlayer spacing, conductive flexible graphite carbon and abundant oxygen vacancies. As a result, the as‐synthesized electrode yields an ultra‐high specific capacitance of 717 F g −1 at 1 A g −1 and ultra‐long cycling durability with no obvious capacitive loss even after 100 000 cycles. Realistically, the assembled asymmetric supercapacitor (MoO x ‐HDA‐3//MnO 2 ) exhibits extraordinary energy density of 78.2 Wh kg −1 , superior to many advanced supercapacitors reported to date. We have fabricated pouch devices, which can successfully run 3C products such as tablets and smartphones, and maintain stable electrochemical performance even after heavy strikes, fires, and pressures. Quantitative investigation results confirm that the pouch device delivers an excellent specific capacitance of 74.7 F g −1 and a high energy density of 41.5 Wh kg −1 . This work enhances the confidence of pushing aqueous supercapacitors to realistic energy storage market.
Epoxy-gold nanoparticle nanocomposites with enhanced thermo-mechanical properties: An integrated modelling and experimental study
Publisher: Elsevier BV
Date: 04-2019
Graphene oxide for photonics, electronics and optoelectronics
Publisher: Springer Science and Business Media LLC
Date: 17-01-2023
Tunable high-efficiency light absorption of monolayer graphene via Tamm plasmon polaritons
Publisher: The Optical Society
Date: 10-10-2016
DOI: 10.1364/OL.41.004743
Working Alliance in Online Cognitive Behavior Therapy for Anxiety Disorders in Youth: Comparison With Clinic Delivery and its Role in Predicting Outcome
Publisher: JMIR Publications Inc.
Date: 28-06-2012
DOI: 10.2196/JMIR.1848
Dieting and health in young Australian women
Publisher: Wiley
Date: 2001
DOI: 10.1002/ERV.388
Photo-Thermal Tuning of Graphene Oxide Coated Integrated Optical Waveguides
Publisher: MDPI AG
Date: 28-07-2022
DOI: 10.3390/MI13081194
Abstract: We experimentally investigate power-sensitive photo-thermal tuning (PTT) of two-dimensional (2D) graphene oxide (GO) films coated on integrated optical waveguides. We measure the light power thresholds for reversible and permanent GO reduction in silicon nitride (SiN) waveguides integrated with one and two layers of GO. For the device with one layer of GO, the power threshold for reversible and permanent GO reduction are ~20 and ~22 dBm, respectively. For the device with two layers of GO, the corresponding results are ~13 and ~18 dBm, respectively. Raman spectra at different positions of a hybrid waveguide with permanently reduced GO are characterized, verifying the inhomogeneous GO reduction along the direction of light propagation through the waveguide. The differences between the PTT induced by a continuous-wave laser and a pulsed laser are also compared, confirming that the PTT mainly depend on the average input power. These results reveal interesting features for 2D GO films coated on integrated optical waveguides, which are of fundamental importance for the control and engineering of GO’s properties in hybrid integrated photonic devices.
Architecting Bismuth Molybdate Nanoparticles with Abundant Oxygen Vacancies and High Bismuth Concentration for Efficient N2 Electroreduction to NH3
Publisher: Wiley
Date: 26-07-2023
Highly efficient and ultra-broadband graphene oxide ultrathin lenses with three-dimensional subwavelength focusing
Publisher: Springer Science and Business Media LLC
Date: 22-09-2015
DOI: 10.1038/NCOMMS9433
Abstract: Nanometric flat lenses with three-dimensional subwavelength focusing are indispensable in miniaturized optical systems. However, they are fundamentally challenging to achieve because of the difficulties in accurately controlling the optical wavefront by a film with nanometric thickness. Based on the unique and giant refractive index and absorption modulations of the sprayable graphene oxide thin film during its laser reduction process, we demonstrate a graphene oxide ultrathin (∼200 nm) flat lens that shows far-field three-dimensional subwavelength focusing ( λ 3 /5) with an absolute focusing efficiency of % for a broad wavelength range from 400 to 1,500 nm. Our flexible graphene oxide lenses are mechanically robust and maintain excellent focusing properties under high stress. The simple and scalable fabrication approach enables wide potential applications in on-chip nanophotonics. The wavefront shaping concept opens up new avenues for easily accessible, highly precise and efficient optical beam manipulations with a flexible and integratable planar graphene oxide ultrathin film.
Phobic anxiety in 11 nations
Publisher: Elsevier BV
Date: 04-2003
DOI: 10.1016/S0005-7967(02)00047-5
Abstract: The Fear Survey Schedule-III (FSS-III) was administered to a total of 5491 students in Australia, East Germany, Great Britain, Greece, Guatemala, Hungary, Italy, Japan, Spain, Sweden, and Venezuela, and submitted to the multiple group method of confirmatory analysis (MGM) in order to determine the cross-national dimensional constancy of the five-factor model of self-assessed fears originally established in Dutch, British, and Canadian s les. The model comprises fears of bodily injury-illness-death, agoraphobic fears, social fears, fears of sexual and aggressive scenes, and harmless animals fears. Close correspondence between the factors was demonstrated across national s les. In each country, the corresponding scales were internally consistent, were intercorrelated at magnitudes comparable to those yielded in the original s les, and yielded (in 93% of the total number of 55 comparisons) sex differences in line with the usual finding (higher scores for females). In each country, the relatively largest sex differences were obtained on harmless animals fears. The organization of self-assessed fears is sufficiently similar across nations to warrant the use of the same weight matrix (scoring key) for the FSS-III in the different countries and to make cross-national comparisons feasible. This opens the way to further studies that attempt to predict (on an a priori basis) cross-national variations in fear levels with dimensions of national cultures.
Radiative cooling: Fundamental physics, atmospheric influences, materials and structural engineering, applications and beyond
Publisher: Elsevier BV
Date: 02-2021
Graphene oxide waveguide and micro-ring resonator polarizers
Publisher: SPIE
Date: 30-12-2019
DOI: 10.1117/12.2540370
Near-infrared high refractive-index three-dimensional inverse woodpile photonic crystals generated by a sol-gel process
Publisher: AIP Publishing
Date: 11-2007
DOI: 10.1063/1.2803714
Abstract: We demonstrate the formation of complete pieces of high refractive-index three-dimensional inverse woodpile photonic crystals by a simple and inexpensive sol-gel process. A mixture of the titanium dioxide precursor and the silica dioxide precursor was infiltrated multiple times into a polymeric template produced by two-photon polymerization to improve the mechanical properties of the inverse structure. After removal of the polymer template, transparent inverse photonic crystals with a refractive index of approximately 2.2 were achieved. The spectroscopic characterization reveals a stop gap in the near-infrared wavelength range, agreeing with the theoretical prediction.
High‐Speed Modulator Based on Electro‐Optic Polymer Infiltrated Subwavelength Grating Waveguide Ring Resonator
Publisher: Wiley
Date: 17-05-2018
Virtual reality exposure and standard exposure were both effective at 1 year for fear of flying
Publisher: BMJ
Date: 11-2002
DOI: 10.1136/EBMH.5.4.121
Theoretical investigation of CoTa2O6/graphene heterojunctions for oxygen evolution reaction
Publisher: Springer Science and Business Media LLC
Date: 07-10-2021
Fabrication of three-dimensional photonic crystals in quantum-dot-based materials
Publisher: Wiley
Date: 17-06-2009
Diodelike asymmetric transmission in hybrid plasmonic waveguides via breaking polarization symmetry
Publisher: IOP Publishing
Date: 22-03-2017
Self‐Supporting Electrodes for Gas‐Involved Key Energy Reactions
Publisher: Wiley
Date: 20-07-2021
Abstract: Self‐supporting materials are widely adopted in gas‐involved electrocatalysis during the past few decades because of their unique physical/electrochemical properties, especially the stabilized spatial framework and the large electrochemical interfaces. Reportedly, there is no clear definition to define “self‐supporting” materials, and also, no such comprehensive reviews have fully discussed the self‐supporting materials in gas‐involved electrochemical applications. Therefore, it is necessary to provide timely updates in this potential field. In this review, for the first time, a reasonable definition of self‐supporting materials and comprehensively review the recent research progress of related electrodes in gas‐involved electrocatalytic applications is given. Firstly, it is discussed their synthetic methodologies, including design principles, different types of substrates‐ and substrate‐free structures. Subsequently, the recent advances of self‐supporting electrodes for gas‐involved key energy related electrocatalysis (i.e., hydrogen evolution, oxygen reduction, oxygen evolution, nitrogen reduction, and carbon dioxide reduction reactions) and their practical applications in water‐splitting, fuel cells and metal‐air batteries are mainly presented. Finally, a summary of the progress of self‐supporting electrocatalysts, the remaining challenges, and the perspectives are given to instruct their future development. It is expected that this review will provide new research insights for the future development of renewable energy storage and conversion systems.
Nano-fabrication techniques for near-field photonic crystals
Publisher: IEEE
Date: 2003
Application of metal nanowire networks on hydrogenated amorphous silicon thin film solar cells
Publisher: IOP Publishing
Date: 25-01-2017
Abstract: We demonstrate the application of metal nanowire (NW) networks as a transparent electrode on hydrogenated amorphous Si (a-Si:H) solar cells. We first systematically investigate the optical performances of the metal NW networks on a-Si:H solar cells in different electrode configurations through numerical simulations to fully understand the mechanisms to guide the experiments. The theoretically optimized configuration is discovered to be metal NWs sandwiched between a 40 nm indium tin oxide (ITO) layer and a 20 nm ITO layer. The overall performances of the solar cells integrated with the metal NW networks are experimentally studied. It has been found the experimentally best performing NW integrated solar cell deviates from the theoretically predicated design due to the performance degradation induced by the fabrication complicity. A 6.7% efficiency enhancement was achieved for the solar cell with metal NW network integrated on top of a 60 nm thick ITO layer compared to the cell with only the ITO layer due to enhanced electrical conductivity by the metal NW network.
Enhanced photocurrent in crystalline silicon solar cells by hybrid plasmonic antireflection coatings
Publisher: AIP Publishing
Date: 24-12-2012
DOI: 10.1063/1.4773038
Abstract: Photocurrent enhancement induced by plasmonic light trapping is of great interest for photovoltaics. We design and demonstrate hybrid plasmonic antireflection coatings as an efficient light trapping strategy for broadband absorption and photocurrent enhancement in crystalline silicon solar cells. Gold nanoparticles of size ranging from 15 to 150 nm are embedded in standard SiNx antireflection coatings with a thickness of 90 nm. Through optimizing the location of tailored nanoparticles within the SiNx layer, both light scattering enhancement and near-field light concentration can be harnessed. A maximum increase of 6.3% in photocurrent is achieved for textured multi-crystalline Si solar cells with the optimum configuration.
A 90-nm-thick graphene metamaterial for strong and extremely broadband absorption of unpolarized light
Publisher: Springer Science and Business Media LLC
Date: 18-03-2019
Functional Optical Plasmonic Resonators Fabricated via Highly Photosensitive Direct Laser Reduction
Publisher: Wiley
Date: 20-12-2015
Complete absorption of broadband, unpolarized light in a deep-subwavelength graphene metamaterial
Publisher: OSA
Date: 2017
Imaging rule of diffractive ultrathin flat lens
Publisher: SPIE
Date: 12-03-2020
DOI: 10.1117/12.2542420
Plasmonic diatomic metasurfaces for full-Stokes polarization perfect absorption
Publisher: Optica Publishing Group
Date: 2021
DOI: 10.1364/CLEO_QELS.2021.FW4J.2
Abstract: We demonstrate experimentally perfect absorbers for arbitrary polarization (linear, circular, or elliptical) in the mid-IR based on plasmonic diatomic metasurfaces, which provide perfect absorption for any specific polarization and almost total reflection for the orthogonal polarization.
Hot deformation behavior and constitutive model of TC18 alloy during compression
Publisher: Springer Science and Business Media LLC
Date: 08-2014
The influence of pre-injury behaviour on children's type of accident, type of injury and severity of injury
Publisher: Informa UK Limited
Date: 2008
DOI: 10.1080/02699050802132453
Abstract: To investigate the relationship between children's pre-injury behaviour and accident type (high vs. low risk), injury type (traumatic brain injury (TBI), fractures/dislocations and other injuries) and TBI severity. Cross-sectional comparison of 205 children with TBI aged 6-14 years, with 101 children aged 7-14 years with non-TBI injuries. Pre-injury behavioural data were collected via parental report with the Child Behaviour Checklist. Information on children's accident type and TBI severity was obtained from medical records. The pre-injury behaviour of children involved in high or low risk accidents did not differ. Pre-injury behavioural differences were observed among children with TBI, fractures/dislocations, other injuries and normative s les. The involvement of children in high and low risk accidents differed depending on the severity of TBI. Pre-injury behaviour of children with mild or moderate/severe TBI was similar. Pre-injury behaviour does not appear to influence children's involvement in high vs. low risk accidents or the severity of their TBI. However pre-injury behaviour increases children's differential risk for types of accidental injuries.
Nanoplasmonics: a frontier of photovoltaic solar cells
Publisher: Walter de Gruyter GmbH
Date: 12-2012
Abstract: Nanoplasmonics recently has emerged as a new frontier of photovoltaic research. Noble metal nanostructures that can concentrate and guide light have demonstrated great capability for dramatically improving the energy conversion efficiency of both laboratory and industrial solar cells, providing an innovative pathway potentially transforming the solar industry. However, to make the nanoplasmonic technology fully appreciated by the solar industry, key challenges need to be addressed including the detrimental absorption of metals, broadband light trapping mechanisms, cost of plasmonic nanomaterials, simple and inexpensive fabrication and integration methods of the plasmonic nanostructures, which are scalable for full size manufacture. This article reviews the recent progress of plasmonic solar cells including the fundamental mechanisms, material fabrication, theoretical modelling and emerging directions with a distinct emphasis on solutions tackling the above-mentioned challenges for industrial relevant applications.
A Comparative Study of Physico-Chemical Parameter in Glacial Melt Water, Ponkar Glacier, Nepal
Publisher: Scientific Research Publishing, Inc.
Date: 2021
Hot deformation behavior of TC18 titanium alloy
Publisher: National Library of Serbia
Date: 2013
DOI: 10.2298/TSCI1305523J
Abstract: Isothermal compression tests of TC18 titanium alloy at the deformation temperatures ranging from 25?C to 800?C and strain rate ranging from 10-4 to 10-2 s-1 were conducted by using a WDW-300 electronic universal testing machine. The hot deformation behavior of TC18 was characterized based on an analysis of the true stress-true strain curves of TC18 titanium alloy. The curves show that the flow stress increases with increasing the strain rate and decreases with increasing the temperature, and the strain rate play an important role in the flow stress when increasing the temperatures. By taking the effect of strain into account, an improved constitutive relationship was proposed based on the Arrhenius equation. By comparison with the experimental results, the model prediction agreed well with the experimental data, which demonstrated the established constitutive relationship was reliable and can be used to predict the hot deformation behavior of TC18 titanium alloy.
The optical properties of Cs4PbBr6–CsPbBr3 perovskite composites
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9NR04787E
Abstract: The green fluorescence of CsPbBr 3 –Cs 4 PbBr 6 perovskite composites is ascribed to the emissions of band-edge and the defect trapped exciton of CsPbBr 3 .
Cognitions and heart rate in panic disorders during everyday activity
Publisher: Elsevier BV
Date: 1989
Topology optimization of photonic structures for all-angle negative refraction
Publisher: Elsevier BV
Date: 09-2016
Sensory hypersensitivity occurs soon after whiplash injury and is associated with poor recovery
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 08-2003
Trauma in Early Childhood: A Neglected Population
Publisher: Springer Science and Business Media LLC
Date: 04-2011
DOI: 10.1007/S10567-011-0094-3
Abstract: Infants, toddlers and preschoolers are a high risk group for exposure to trauma. Young children are also vulnerable to experiencing adverse outcomes as they are undergoing a rapid developmental period, have limited coping skills and are strongly dependent on their primary caregiver to protect them physically and emotionally. However, although millions of young children experience trauma each year, this population has been largely neglected. Fortunately, over the last 2 decades there has been a growing appreciation of the magnitude of the problem with a small but expanding number of dedicated researchers and clinicians working with this population. This review examines the empirical literature on trauma in young children with regards to the following factors: (1) how trauma reactions typically manifest in young children (2) history and diagnostic validity of posttraumatic stress disorder (PTSD) in preschoolers (3) prevalence, comorbidity and course of trauma reactions (4) developmental considerations (5) risk and protective factors and (6) treatment. The review highlights that there are unique developmental differences in the rate and manifestation of trauma symptomatology, the current Diagnostic and Statistical Manual of Mental Disorders (4th ed., DSM-IV-TR) PTSD criteria is not developmentally sensitive and the impact of trauma must be considered within the context of the parent-child relationship. Recommendations for future research with this population are also discussed.
Spectral redistribution in spontaneous emission from quantum dot infiltrated three-dimensional photonic crystals
Publisher: IEEE
Date: 06-2007
Protocol for a randomised controlled trial investigating the effectiveness of an online e-health application compared to attention placebo or sertraline in the treatment of generalised anxiety disorder
Publisher: Springer Science and Business Media LLC
Date: 30-04-2010
Optomechanical micro-structures for single-crystal diamond
Publisher: SPIE
Date: 30-12-2019
DOI: 10.1117/12.2540591
Systematic Review and Meta-Analysis of Multiple-Session Early Interventions Following Traumatic Events
Publisher: American Psychiatric Association Publishing
Date: 03-2009
DOI: 10.1176/APPI.AJP.2008.08040590
Abstract: The authors sought to determine the efficacy of multiple-session psychological interventions to prevent and treat traumatic stress symptoms beginning within 3 months of a traumatic event. Nine computerized databases were searched, and manual searches were conducted of reference lists of selected articles as well as two journals. In addition, key researchers in the field were contacted to determine whether they were aware of other relevant studies. The reviewers identified randomized controlled trials of multiple-session psychological treatments aimed at preventing or reducing traumatic stress symptoms in in iduals within 3 months of exposure to a traumatic event. Details of the studies were independently extracted by two reviewers, and outcome data were entered into the Review Manager software package. Quality assessment was also conducted by two researchers independently. Twenty-five studies examining a range of interventions were identified. For treatment of in iduals exposed to a trauma irrespective of their symptoms, there was no significant difference between any intervention and usual care. For treatment of traumatic stress symptoms irrespective of diagnosis, trauma-focused cognitive-behavioral therapy (CBT) was more effective than waiting list or supportive counseling conditions. The difference was greatest for treatment of acute stress disorder and acute posttraumatic stress disorder. Trauma-focused CBT within 3 months of a traumatic event appears to be effective for in iduals with traumatic stress symptoms, especially those who meet the threshold for a clinical diagnosis.
Optical gears in a nanophotonic directional coupler
Publisher: The Optical Society
Date: 03-05-2017
DOI: 10.1364/OE.25.010972
Efficiently-cooled plasmonic amorphous silicon solar cells integrated with a nano-coated heat-pipe plate
Publisher: Springer Science and Business Media LLC
Date: 26-04-2016
DOI: 10.1038/SREP24972
Abstract: Solar photovoltaics (PV) are emerging as a major alternative energy source. The cost of PV electricity depends on the efficiency of conversion of light to electricity. Despite of steady growth in the efficiency for several decades, little has been achieved to reduce the impact of real-world operating temperatures on this efficiency. Here we demonstrate a highly efficient cooling solution to the recently emerging high performance plasmonic solar cell technology by integrating an advanced nano-coated heat-pipe plate. This thermal cooling technology, efficient for both summer and winter time, demonstrates the heat transportation capability up to ten times higher than those of the metal plate and the conventional wickless heat-pipe plates. The reduction in temperature rise of the plasmonic solar cells operating under one sun condition can be as high as 46%, leading to an approximate 56% recovery in efficiency, which dramatically increases the energy yield of the plasmonic solar cells. This newly-developed, thermally-managed plasmonic solar cell device significantly extends the application scope of PV for highly efficient solar energy conversion.
Protocol for a randomised controlled trial of risk screening and early intervention comparing child- and family-focused cognitive-behavioural therapy for PTSD in children following accidental injury
Publisher: Springer Science and Business Media LLC
Date: 20-01-2011
Toward optimal early management after whiplash injury to lessen the rate of transition to chronicity
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 12-2011
Photo-thermal tuning of graphene oxide coated integrated optical waveguides
Publisher: SPIE
Date: 17-03-2023
DOI: 10.1117/12.2647954
Enhanced Spectral Broadening of Femtosecond Optical Pulses in Silicon Nanowires Integrated with 2D Graphene Oxide Films
Publisher: MDPI AG
Date: 11-05-2022
DOI: 10.3390/MI13050756
Abstract: We experimentally demonstrate enhanced spectral broadening of femtosecond optical pulses after propagation through silicon-on-insulator (SOI) nanowire waveguides integrated with two-dimensional (2D) graphene oxide (GO) films. Owing to the strong mode overlap between the SOI nanowires and the GO films with a high Kerr nonlinearity, the self-phase modulation (SPM) process in the hybrid waveguides is significantly enhanced, resulting in greatly improved spectral broadening of the femtosecond optical pulses. A solution-based, transfer-free coating method is used to integrate GO films onto the SOI nanowires with precise control of the film thickness. Detailed SPM measurements using femtosecond optical pulses are carried out, achieving a broadening factor of up to ~4.3 for a device with 0.4-mm-long, 2 layers of GO. By fitting the experimental results with the theory, we obtain an improvement in the waveguide nonlinear parameter by a factor of ~3.5 and in the effective nonlinear figure of merit (FOM) by a factor of ~3.8, relative to the uncoated waveguide. Finally, we discuss the influence of GO film length on the spectral broadening and compare the nonlinear optical performance of different integrated waveguides coated with GO films. These results confirm the improved nonlinear optical performance of silicon devices integrated with 2D GO films.
Ultrafast Tm:CaYAlO4 laser with pulse regulation and saturation parameters evolution in the 2 μm water absorption band
Publisher: Elsevier BV
Date: 08-2022
Graphene Oxide Waveguide and Micro‐Ring Resonator Polarizers
Publisher: Wiley
Date: 13-08-2019
Tunable Multicolor Fluorescence of Perovskite-Based Composites for Optical Steganography and Light-Emitting Devices
Publisher: American Association for the Advancement of Science (AAAS)
Date: 2022
Abstract: Multicolor fluorescence of mixed halide perovskites enormously enables their applications in photonics and optoelectronics. However, it remains an arduous task to obtain multicolor emissions from perovskites containing single halogen to avoid phase segregation. Herein, a fluorescent composite containing Eu-based metal-organic frameworks (MOFs), 0D Cs 4 PbBr 6 , and 3D CsPbBr 3 is synthesized. Under excitations at 365 nm and 254 nm, the pristine composite emits blue (B) and red (R) fluorescence, which are ascribed to radiative defects within Cs 4 PbBr 6 and 5 D 0 → 7 F J transitions of Eu 3+ , respectively. Interestingly, after light soaking in the ambient environment, the blue fluorescence gradually converts into green (G) emission due to the defect repairing and 0D-3D phase conversion. This permanent and unique photochromic effect enables anticounterfeiting and microsteganography with increased security through a micropatterning technique. Moreover, the RGB luminescence is highly stable after encapsulation by a transparent polymer layer. Thus, trichromatic light-emitting modules are fabricated by using the fluorescent composites as color-converting layers, which almost fully cover the standard color gamut. Therefore, this work innovates a strategy for construction of tunable multicolor luminescence by manipulating the radiative defects and structural dimensionality.
Strategies for Optimizing the Photocatalytic Water‐Splitting Performance of Metal–Organic Framework‐Based Materials
Publisher: Wiley
Date: 24-09-2021
Abstract: Semiconductor photocatalytic hydrogen production technology is a pollution‐free and low‐cost technology, which is principal to alleviate the energy crisis. The metal–organic frameworks (MOFs)‐based materials have been widely used in this field because of their regular and controllable pore structure and high specific surface area. Accordingly, the recent progress of MOFs‐based materials in the production of hydrogen through water splitting is reviewed. First, the mechanism of photocatalytic hydrogen production and the existing problems are proposed and then their advantages in photocatalytic hydrogen production and various photocatalytic hydrogen production catalysts based on MOFs are summarized. Subsequently, several methods to improve their photocatalytic hydrogen production property are summarized. Finally, some views on the prospects and challenges of the use of MOFs‐based catalysts for photocatalytic hydrolysis are expounded. Although some reviews associated with MOFs for solar‐driven H 2 production have been published, most of them focus on the classification of MOFs photocatalysts. This is the first comprehensive review concentrating on the strategies for optimizing the photocatalytic activity of MOFs‐based materials for H 2 production. It is believed that the suggestions provided here can help to study MOFs‐based photocatalytic reactions and to further promote the development of this research direction in the future.
Two-photon polymerization for three-dimensional photonic devices in polymers and nanocomposites
Publisher: CSIRO Publishing
Date: 2007
DOI: 10.1071/CH06484
Abstract: Fabrication of micro- or nano-scale photonic devices in polymer materials to control and manipulate light propagation represents a hot topic nowadays. Compared with conventional semiconductor materials, polymers are easy to prepare and have the flexibility of incorporating active materials to realise various functionalities. As one of the most powerful tools in micro-optical fabrication, the two-photon polymerization technique has been widely employed recently to produce multifarious photonic devices, particularly the photonic crystals, which are promising candidates for integrated optical devices. In this article the recent advances in the fabrication of three-dimensional photonic devices such as diffractive optical elements, photonic crystals, and superprisms in polymer materials using the two-photon polymerization technique are reviewed. In particular, the fabrication of photonic crystals in nanocomposite polymers, which are formed by incorporating nanocrystal quantum dots into polymer materials, is demonstrated, providing an interesting physical platform for the investigation into new types of active micro-devices.
Graphene Oxide for Nonlinear Integrated Photonics
Publisher: Wiley
Date: 02-01-2023
Abstract: Integrated photonic devices operating via optical nonlinearities offer a powerful solution for all‐optical information processing, yielding processing speeds that are well beyond that of electronic processing as well as providing the added benefits of compact footprint, high stability, high scalability, and small power consumption. The increasing demand for high‐performance nonlinear integrated photonic devices has facilitated the hybrid integration of novel materials to address the limitations of existing integrated photonic platforms. Recently, graphene oxide (GO), with its large optical nonlinearity, high flexibility in altering its properties, and facile fabrication processes, has attracted significant attention, enabling many hybrid nonlinear integrated photonic devices with improved performance and novel capabilities. This paper reviews the applications of GO to nonlinear integrated photonics. First, an overview of GO's optical properties and the fabrication technologies needed for its on‐chip integration is provided. Next, the state‐of‐the‐art GO nonlinear integrated photonic devices are reviewed, followed by comparisons of the nonlinear optical performance of different integrated platforms incorporating GO as well as hybrid integrated devices including different kinds of 2D materials. Finally, the current challenges and future opportunities in this field are discussed.
Polarisation characterisation in the focal region of a high numerical aperture objective under radial polarisation illumination
Publisher: IEEE
Date: 08-2009
Effect of graphene oxide concentration on the flexural properties of CFRP at low temperature
Publisher: Elsevier BV
Date: 11-2019
Rethinking the classification of games and sports in physical education: a response to changes in sport and participation
Publisher: Informa UK Limited
Date: 13-04-2022
Rechargeable sunlight-promoted Zn-air battery constructed by bifunctional oxygen photoelectrodes: Energy-band switching between ZnO/Cu2O and ZnO/CuO in charge-discharge cycles
Publisher: Elsevier BV
Date: 04-2022
Direct observation of a pure focused evanescent field of a high numerical aperture objective lens by scanning near-field optical microscopy
Publisher: AIP Publishing
Date: 22-03-2005
DOI: 10.1063/1.1886250
Abstract: Intensity distributions of a tightly focused evanescent field generated by a center blocked high numerical aperture (1.65) objective lens are investigated by a scanning near-field optical microscope. The pure focused evanescent field is mapped and a splitting phenomenon of the focal spot along the direction of polarization, caused by depolarization, is observed not only on the interface, where the evanescent field is generated, but also in the parallel planes away from the interface. The decaying nature of the focused evanescent field shows good agreement with the theoretical predication, indicating that the field is purely evanescent and does not contain a significant contribution from the propagating component. It is found in our experiment that the light coupling efficiencies of the longitudinal polarization component Ez and the transverse polarization component Ex to the fiber probe differ by a factor of 3.
High-speed modulator based on electro-optic polymer infiltrated subwavelength grating waveguide ring resonator
Publisher: SPIE
Date: 02-03-2018
DOI: 10.1117/12.2291366
Active sorting of orbital angular momentum states of light with a cascaded tunable resonator
Publisher: Springer Science and Business Media LLC
Date: 28-01-2020
DOI: 10.1038/S41377-020-0243-X
Abstract: The orbital angular momentum (OAM) of light has been shown to be useful in erse fields ranging from astronomy and optical trapping to optical communications and data storage. However, one of the primary impediments preventing such applications from widespread adoption is the lack of a straightforward and dynamic method to sort incident OAM states without altering the states. Here, we report a technique that can dynamically filter in idual OAM states and preserve the incident OAM states for subsequent processing. Although the working principle of this technique is based on resonance, the device operation is not limited to a particular wavelength. OAM states with different wavelengths can resonate in the resonator without any additional modulation other than changing the length of the cavity. Consequently, we are able to demonstrate a reconfigurable OAM sorter that is constructed by cascading such optical resonators. This approach does not require specially designed components and is readily amenable to integration into potential applications.
Breaking Platinum Nanoparticles to Single‐Atomic Pt‐C4 Co‐catalysts for Enhanced Solar‐to‐Hydrogen Conversion
Publisher: Wiley
Date: 26-11-2020
Super-resolution longitudinally polarized light needle achieved by tightly focusing radially polarized beams
Publisher: Springer Science and Business Media LLC
Date: 2018
Research Progress of Micro-LED Display Technology
Publisher: MDPI AG
Date: 23-06-2023
Tunable Thermochromic Graphene Metamaterials with Iridescent Color
Publisher: American Chemical Society (ACS)
Date: 31-05-2022
DOI: 10.1021/ACS.NANOLETT.1C04768
Abstract: Thermochromic materials have been widely applied in energy-efficient buildings, aerospace, textiles, and sensors. Conventional thermochromic materials rely on material phase or structure changes upon thermal stimuli, which only enable a few colors, greatly limiting their applicability. Here, we propose and demonstrate the concept of dynamically tunable thermochromic graphene metamaterials (TGMs), which can achieve continuous color tunability (380-800 nm) with fast (<100 ms) response times. The TGMs are composed of an ultrathin graphene oxide (GO) film on a flexible metal substrate. We demonstrated that external thermal energy can dynamically adjust the water contents in the GO film to manipulate the color of TGMs. An impressive thermochromic sensitivity of 1.11 nm/°C covering a large percentage of the color space has been achieved. Prototype applications for a cup and smartphone have been demonstrated. The reversible TGMs promise great potential for practical applications of temperature sensing in optoelectronic devices, environmental monitoring, and dynamic color modulation.
Isolating Single and Few Atoms for Enhanced Catalysis
Publisher: Wiley
Date: 28-08-2022
Abstract: Atomically dispersed metal catalysts have triggered great interest in the field of catalysis owing to their unique features. Isolated single or few metal atoms can be anchored on substrates via chemical bonding or space confinement to maximize atom utilization efficiency. The key challenge lies in precisely regulating the geometric and electronic structure of the active metal centers, thus significantly influencing the catalytic properties. Although several reviews have been published on the preparation, characterization, and application of single‐atom catalysts (SACs), the comprehensive understanding of SACs, dual‐atom catalysts (DACs), and atomic clusters has never been systematically summarized. Here, recent advances in the engineering of local environments of state‐of‐the‐art SACs, DACs, and atomic clusters for enhanced catalytic performance are highlighted. Firstly, various synthesis approaches for SACs, DACs, and atomic clusters are presented. Then, special attention is focused on the elucidation of local environments in terms of electronic state and coordination structure. Furthermore, a comprehensive summary of isolated single and few atoms for the applications of thermocatalysis, electrocatalysis, and photocatalysis is provided. Finally, the potential challenges and future opportunities in this emerging field are presented. This review will pave the way to regulate the microenvironment of the active site for boosting catalytic processes.
Improved reactive dyeing of wool with novel trifunctional reactive dyes†
Publisher: Wiley
Date: 20-03-2007
Spatially Modulating the Fluorescence Color of Mixed-Halide Perovskite Nanoplatelets through Direct Femtosecond Laser Writing.
Publisher: American Chemical Society (ACS)
Date: 07-2019
Abstract: Lead halide perovskites are widely applied in not only photovoltaics but also on-chip light sources and photon detection. To promote the incorporation of perovskite into integrated devices, microscale color patterning flexibility is a very important step. Here, we demonstrate spatially resolved modulation of the fluorescence of nanoplatelets (NPs) by femtosecond direct laser writing (fs-DLW). As the perovskite NP for the fs-DLW pattern is specially designed with a gradual bromide-iodide composition along the depth, the replacement of iodide ions by bromide ions can be activated under a controlled laser pulse and fluorescence is thus modulated from red to green. The effect of processing depth and NP thickness on fluorescence modulation is systemically investigated. The as-grown thick NP (thickness ≈ 500 nm) mainly exhibits a 690 nm emission from the bottom iodine-rich phase. After halide substitution induced by fs-DLW, a new fluorescence peak appears in the wavelength range of 540-600 nm the peak position and intensity are controlled by the DLW conditions. The fluorescent color is spatially modulated from red to green, enabling microscale-resolved multicolor emission. Compared with other currently available techniques, microscale color patterning via fs-DLW is a straightforward mask-free one-step operation, yielding high spatial resolution and enabling three-dimensional patterning by the multiple-photon method. We demonstrate that arbitrary patterns can be drawn on a wide range of perovskite NPs, implying the potential applications in microencryption, sensors, multicolor displays, lasers, and light-emitting devices.
Optimizing two-level hierarchical particles for thin-film solar cells
Publisher: The Optical Society
Date: 26-02-2013
DOI: 10.1364/OE.21.00A285
Enhancing the optical transmittance by using circular silver nanowire networks
Publisher: AIP Publishing
Date: 15-05-2014
DOI: 10.1063/1.4876676
Abstract: The optical transmittance of the circular and square silver nanowire networks with different surrounding dielectric environments is systematically investigated. Key parameters determining the plasmonic effect of the silver nanowires are identified and compared with the change of the nanowire density, the nanowire shape, the substrate materials, and the dielectric embedding materials. The total transmittance as a function of the sheet resistance of the nanowire networks for each case is evaluated. It is revealed that while the sheet resistance of the circular nanowire networks is maintained the same as that of the square networks, the optical transmittance in the former case is increased by up to 3% for the networks on glass, 15% on Si and 13% on Si covered with a 75 nm thick SiNx layer. These results give an improved guidance on the future design of the networks for various photovoltaic applications.
Specializing liquid electrolytes and carbon-based materials in EDLCs for low-temperature applications
Publisher: Elsevier BV
Date: 05-2022
Optimizing the Kerr Nonlinear Optical Performance of Silicon Waveguides Integrated With 2D Graphene Oxide Films
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2021
Flat Lenses Based on 2D Perovskite Nanosheets
Publisher: Wiley
Date: 10-06-2020
Analysis of enhanced four-wave mixing in integrated silicon-graphene oxide hybrid waveguides
Publisher: IEEE
Date: 07-2017
Diffraction-limited imaging with monolayer 2D material-based ultrathin flat lenses
Publisher: Springer Science and Business Media LLC
Date: 11-08-2020
DOI: 10.1038/S41377-020-00374-9
Abstract: Ultrathin flat optics allow control of light at the subwavelength scale that is unmatched by traditional refractive optics. To approach the atomically thin limit, the use of 2D materials is an attractive possibility due to their high refractive indices. However, achievement of diffraction-limited focusing and imaging is challenged by their thickness-limited spatial resolution and focusing efficiency. Here we report a universal method to transform 2D monolayers into ultrathin flat lenses. Femtosecond laser direct writing was applied to generate local scattering media inside a monolayer, which overcomes the longstanding challenge of obtaining sufficient phase or litude modulation in atomically thin 2D materials. We achieved highly efficient 3D focusing with subwavelength resolution and diffraction-limited imaging. The high focusing performance even allows diffraction-limited imaging at different focal positions with varying magnifications. Our work paves the way for downscaling of optical devices using 2D materials and reports an unprecedented approach for fabricating ultrathin imaging devices.
Molecularly Engineered Covalent Organic Frameworks for Hydrogen Peroxide Photosynthesis
Publisher: Wiley
Date: 25-02-2022
Abstract: Synthesizing H 2 O 2 from water and air via a photocatalytic approach is ideal for efficient production of this chemical at small‐scale. However, the poor activity and selectivity of the 2 e − water oxidation reaction (WOR) greatly restricts the efficiency of photocatalytic H 2 O 2 production. Herein we prepare a bipyridine‐based covalent organic framework photocatalyst (denoted as COF‐TfpBpy) for H 2 O 2 production from water and air. The solar‐to‐chemical conversion (SCC) efficiency at 298 K and 333 K is 0.57 % and 1.08 %, respectively, which are higher than the current reported highest value. The resulting H 2 O 2 solution is capable of degrading pollutants. A mechanistic study revealed that the excellent photocatalytic activity of COF‐TfpBpy is due to the protonation of bipyridine monomer, which promotes the rate‐determining reaction (2 e − WOR) and then enhances Yeager‐type oxygen adsorption to accelerate 2 e − one‐step oxygen reduction. This work demonstrates, for the first time, the COF‐catalyzed photosynthesis of H 2 O 2 from water and air and paves the way for wastewater treatment using photocatalytic H 2 O 2 solution.
An exploration of the relationship between expression of hostility and the anxiety disorders
Publisher: Elsevier BV
Date: 1993
DOI: 10.1016/0022-3956(93)90046-5
Abstract: The purpose of the present study was to investigate differences between four anxiety disorder groups with respect to their levels of hostility. Patients with diagnoses of panic disorder, agoraphobia with panic, generalized anxiety disorder and social phobia were compared as regards their performance on the Hostility and Direction of Hostility Questionnaire (HDHQ). Results showed that while the groups did not differ on their extrapunitiveness, there were significant differences on intropunitive scores, with social phobics showing the most self criticism and guilt, followed in order by the agoraphobics with panic, generalized anxiety disorder and panic disorder subjects. Scores on the Anxiety Symptoms and Consequences Scale were used to predict intropunitiveness and extrapunitiveness for each diagnostic group. Results showed that intropunitiveness was related to anxiety symptoms differently for each diagnostic group. Overall, the study indicates that intropunitive hostility may be an important feature of anxiety disorders, especially panic with and without agoraphobia, and that the finding is worth further exploration with longitudinal studies.
High-Performance Ultrathin Organic–Inorganic Hybrid Silicon Solar Cells via Solution-Processed Interface Modification
Publisher: American Chemical Society (ACS)
Date: 22-06-2017
Abstract: Organic-inorganic hybrid solar cells based on n-type crystalline silicon and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) exhibited promising efficiency along with a low-cost fabrication process. In this work, ultrathin flexible silicon substrates, with a thickness as low as tens of micrometers, were employed to fabricate hybrid solar cells to reduce the use of silicon materials. To improve the light-trapping ability, nanostructures were built on the thin silicon substrates by a metal-assisted chemical etching method (MACE). However, nanostructured silicon resulted in a large amount of surface-defect states, causing detrimental charge recombination. Here, the surface was smoothed by solution-processed chemical treatment to reduce the surface/volume ratio of nanostructured silicon. Surface-charge recombination was dramatically suppressed after surface modification with a chemical, associated with improved minority charge-carrier lifetime. As a result, a power conversion efficiency of 9.1% was achieved in the flexible hybrid silicon solar cells, with a substrate thickness as low as ∼14 μm, indicating that interface engineering was essential to improve the hybrid junction quality and photovoltaic characteristics of the hybrid devices.
Graphene metalens for particle nanotracking
Publisher: Optica Publishing Group
Date: 15-07-2020
DOI: 10.1364/PRJ.397262
Abstract: Particle nanotracking (PNT) is highly desirable in lab-on-a-chip systems for flexible and convenient multiparameter measurement. An ultrathin flat lens is the preferred imaging device in such a system, with the advantage of high focusing performance and compactness. However, PNT using ultrathin flat lenses has not been demonstrated so far because PNT requires the clear knowledge of the relationship between the object and image in the imaging system. Such a relationship still remains elusive in ultrathin flat lens-based imaging systems because they operate based on diffraction rather than refraction. In this paper, we experimentally reveal the imaging relationship of a graphene metalens using nanohole arrays with micrometer spacing. The distance relationship between the object and image as well as the magnification ratio is acquired with nanometer accuracy. The measured imaging relationship agrees well with the theoretical prediction and is expected to be applicable to other ultrathin flat lenses based on the diffraction principle. By analyzing the high-resolution images from the graphene metalens using the imaging relationship, 3D trajectories of particles with high position accuracy in PNT have been achieved. The revealed imaging relationship for metalenses is essential in designing different types of integrated optical systems, including digital cameras, microfluidic devices, virtual reality devices, telescopes, and eyeglasses, and thus will find broad applications.
Slow Response of Carrier Dynamics in Perovskite Interface upon Illumination
Publisher: American Chemical Society (ACS)
Date: 28-08-2018
Abstract: The current-voltage hysteresis, as well as the performance instability of perovskite solar cells (PSCs) under a working condition, is serving as the major obstacle toward their commercialization while the exact fundamental mechanisms to these issues are still in debate. In this study, we investigated the slow variation of photogenerated carrier dynamics in a (FAPbI
Protocol for a randomised controlled trial investigating the effectiveness of an online e health application for the prevention of Generalised Anxiety Disorder
Publisher: Springer Science and Business Media LLC
Date: 21-03-2010
Ultrafast direct laser writing of 2D materials for multifunctional photonics devices [Invited]
Publisher: Shanghai Institute of Optics and Fine Mechanics
Date: 2020
Physical and psychological aspects of whiplash: Important considerations for primary care assessment
Publisher: Elsevier BV
Date: 04-2008
DOI: 10.1016/J.MATH.2007.11.003
Abstract: Whiplash is a heterogenous and in many, a complex condition involving both physical and psychological factors. Primary care practitioners are often the first healthcare contact for in iduals with a whiplash injury and as such play an important role in gauging prognosis as well as providing appropriate management for whiplash injured patients. It is imperative that factors associated with poor outcome are recognized and managed in the primary care environment at the crucial early acute stage post injury. This paper outlines the heterogeneity of the whiplash condition in terms of both physical (particularly the sensory presentation) and psychological characteristics and the relationships between these features. The clinical assessment of these factors will be explored as well as direction for appropriate early interventions. An early co-ordinated inter-professional management approach, particularly in patients with a complex clinical presentation involving central hyperexcitability and symptoms of posttraumatic stress will be required.
Metallic-Bonded Pt–Co for Atomically Dispersed Pt in the Co4N Matrix as an Efficient Electrocatalyst for Hydrogen Generation
Publisher: American Chemical Society (ACS)
Date: 02-11-2022
Abstract: Exploiting highly efficient electrocatalysts toward hydrogen evolution reaction (HER) has a significant role in the mass production of hydrogen energy through water electrolysis. Herein, ginkgo leaf-like Co
Microwave Synthesis of Pt Clusters on Black TiO2 with Abundant Oxygen Vacancies for Efficient Acidic Electrocatalytic Hydrogen Evolution
Publisher: Wiley
Date: 23-02-2023
Abstract: Oxygen vacancies‐enriched black TiO 2 is one promising support for enhancing hydrogen evolution reaction (HER). Herein, oxygen vacancies enriched black TiO 2 supported sub‐nanometer Pt clusters (Pt/TiO 2 ‐O V ) with metal support interactions is designed through solvent‐free microwave and following low‐temperature electroless approach for the first time. High‐temperature and strong reductants are not required and then can avoid the aggregation of decorated Pt species. Experimental and theoretical calculation verify that the created oxygen vacancies and Pt clusters exhibit synergistic effects for optimizing the reaction kinetics. Based on it, Pt/TiO 2 ‐O V presents remarkable electrocatalytic performance with 18 mV to achieve 10 mA cm −2 coupled with small Tafel slope of 12 mV dec −1 . This work provides quick synthetic strategy for preparing black titanium dioxide based nanomaterials.
Design of a dynamic multi-topological charge graphene orbital angular momentum metalens
Publisher: Optica Publishing Group
Date: 06-01-2023
DOI: 10.1364/OE.480946
Abstract: Traditional OAM generation devices are bulky and can generally only create OAM with one specific topological charge. Although metasurface-based devices have overcome the volume limitations, no tunable metasurface-based OAM generators have been demonstrated to date. Here, a dynamically tunable multi-topological charge OAM generator based on an ultrathin integrable graphene metalens is demonstrated by simulation using the detour phase technique and spatial multiplexing. Different topological charges can be designed on different focal planes. Stretching the OAM graphene metalens allows the focal plane and the topological values to be changed dynamically. This design method paves an innovative route toward miniaturization and integrating OAM beam-type photonic devices for practical applications.
Metal-Free 2D/2D van der Waals Heterojunction Based on Covalent Organic Frameworks for Highly Efficient Solar Energy Catalysis
Publisher: Springer Science and Business Media LLC
Date: 22-05-2023
Doping mechanism directed graphene applications for energy conversion and storage
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0TA11939C
Abstract: This review provides insight into the major mechanisms, structures, properties, and synthesis methods of doped graphene. The recent applications of doped graphene in energy conversion and storage are reviewed, and future prospects are highlighted.
Near-field mapping of three-dimensional woodpile photonic crystals by using supercontinuum generation
Publisher: IEEE
Date: 06-2007
A Randomized Controlled Trial of a Web-Based Early Intervention for Children and their Parents Following Unintentional Injury
Publisher: Oxford University Press (OUP)
Date: 11-11-2009
Abstract: The aim of this article was to evaluate the effectiveness of an information provision web-based early intervention via a randomized controlled trial for children and their parents following pediatric unintentional injury. Participants were randomly assigned to an intervention (n = 29) or a control group (n = 27) following baseline measurements. Further assessment was taken at 4-6 weeks and 6 months post-trauma event. Analyses revealed that children within the intervention group reported improved anxiety, in comparison to a worsening of symptoms for children in the control group. Furthermore, children who had higher baseline trauma scores reported the intervention to be helpful. The intervention showed promising results in its ability to aid child recovery.
Optical super-resolution effect induced by nonlinear characteristics of graphene oxide films
Publisher: Springer Science and Business Media LLC
Date: 2018
Graphene Metamaterial 3D Conformal Coating for Enhanced Light Harvesting
Publisher: American Chemical Society (ACS)
Date: 19-12-2022
Ammonium-ion energy storage devices for real-life deployment: storage mechanism, electrode design and system integration
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3EE02030D
Which method of posttraumatic stress disorder classification best predicts psychosocial function in children with traumatic brain injury?
Publisher: Elsevier BV
Date: 10-2010
DOI: 10.1016/J.JANXDIS.2010.05.011
Abstract: Controversy surrounds the classification of posttraumatic stress disorder (PTSD), particularly in children and adolescents with traumatic brain injury (TBI). In these populations, it is difficult to differentiate TBI-related organic memory loss from dissociative amnesia. Several alternative PTSD classification algorithms have been proposed for use with children. This paper investigates DSM-IV-TR and alternative PTSD classification algorithms, including and excluding the dissociative amnesia item, in terms of their ability to predict psychosocial function following pediatric TBI. A s le of 184 children aged 6-14 years were recruited following emergency department presentation and/or hospital admission for TBI. PTSD was assessed via semi-structured clinical interview (CAPS-CA) with the child at 3 months post-injury. Psychosocial function was assessed using the parent report CHQ-PF50. Two alternative classification algorithms, the PTSD-AA and 2 of 3 algorithms, reached statistical significance. While the inclusion of the dissociative amnesia item increased prevalence rates across algorithms, it generally resulted in weaker associations with psychosocial function. The PTSD-AA algorithm appears to have the strongest association with psychosocial function following TBI in children and adolescents. Removing the dissociative amnesia item from the diagnostic algorithm generally results in improved validity.
Professional Development Update
Publisher: Informa UK Limited
Date: 07-1996
Soft Plasmene Helical Nanostructures
Publisher: Wiley
Date: 29-01-2023
Abstract: Plasmene is recently defined as 2D arrays of plasmonic nanoparticles, which could be fabricated by the bottom‐up self‐assembly approach and demonstrated a wide range of applications in sensing, energy harvesting, nanophotonics and encryption. Herein, this work further demonstrates a 3D helical plasmonic nanostructures that can be fabricated from 2D plasmene nanosheet. Inspired by chocolate curls‐making process, a micro‐spatula‐based strategy is developed to selectively scrape substrate‐supported plasmene to free space, which spontaneously folds the plasmene nanosheet into various complex helical nanostructures with controlled dimensions. 3D nanospirals can also be obtained by focus ion beam (FIB)‐based lithography on free‐standing plasmene. Helical plasmene structures are robust, exhibiting elastic mechanical properties and chiral optical response. This methodology represents a versatile fabrication route combining both bottom‐up and top‐down approaches to create soft plasmonic helical structures for potential applications in next‐generation flexible nanophotonic devices.
Invited Article: Enhanced four-wave mixing in waveguides integrated with graphene oxide
Publisher: AIP Publishing
Date: 24-10-2018
DOI: 10.1063/1.5045509
Abstract: We demonstrate enhanced four-wave mixing (FWM) in doped silica waveguides integrated with graphene oxide (GO) layers. Owing to strong mode overlap between the integrated waveguides and GO films that have a high Kerr nonlinearity and low loss, the FWM efficiency of the hybrid integrated waveguides is significantly improved. We perform FWM measurements for different pump powers, wavelength detuning, GO coating lengths, and number of GO layers. Our experimental results show good agreement with theory, achieving up to ∼9.5-dB enhancement in the FWM conversion efficiency for a 1.5-cm-long waveguide integrated with 2 layers of GO. We show theoretically that for different waveguide geometries an enhancement in FWM efficiency of ∼20 dB can be obtained in the doped silica waveguides and more than 30 dB in silicon nanowires and slot waveguides. This demonstrates the effectiveness of introducing GO films into integrated photonic devices in order to enhance the performance of nonlinear optical processes.
Metal Halide Perovskite Alloy: Fundamental, Optoelectronic Properties and Applications
Publisher: Wiley
Date: 25-12-2022
Abstract: Metal halide perovskites (MHPs) have demonstrated great advances for photovoltaic and optoelectronic applications. However, owing to the presence of the synergy from lattice strain, defects of MHPs, and environment, MHPs suffer from phase transitions and degradation, resulting in the restriction of their practical applications and further commercialization. Multiple metal elements can coexist in MHPs to form alloys due to the high tolerance of lattice and the composition replaceability, which provides a novel strategy for improvement of performance and stability. In this review, the recent advances of alloy engineering of MHPs, focusing on the cation and the metal ion (A‐ and B‐site) alloy strategies, are reviewed. The alloy effects on the crystalline structure, optoelectronic properties, ferroelectricity, carrier dynamics, and stability of perovskites are interpreted. Finally, the prospect of this study is the challenges in the MHPs alloy engineering.
High tolerance detour-phase graphene-oxide flat lens
Publisher: Optica Publishing Group
Date: 16-11-2021
DOI: 10.1364/PRJ.434599
Abstract: Flat lenses thinner than a wavelength promise to replace conventional refractive lenses in miniaturized optical systems. However, Fresnel zone plate flat lens designs require dense annuli, which significantly challenges nanofabrication resolution. Herein, we propose a new implementation of detour phase graphene flat lens with flexible annular number and width. Several graphene metalenses demonstrated that with a flexible selection of the line density and width, the metalenses can achieve the same focal length without significant distortions. This will significantly weaken the requirement of the nanofabrication system which is important for the development of large-scale flat lenses in industry applications.
Inverse Design of Photonic Topological Insulators with Extra‐Wide Bandgaps
Publisher: Wiley
Date: 20-05-2019
Optimization of ionic-liquid based electrolyte concentration for high-energy density graphene supercapacitors
Publisher: Elsevier BV
Date: 03-2020
Complex sulfur speciation in scapolite - implications for the role of scapolite as a redox and fluid chemistry buffer in crustal fluids
Publisher: Elsevier BV
Date: 09-2023
FAST Search for Circumstellar Atomic Hydrogen. II. Is BD+30°3639 an Interacting Planetary Nebula?
Publisher: American Astronomical Society
Date: 27-07-2023
Abstract: The young, compact, very high surface brightness but low excitation planetary nebula (PN) BD+30°3639 is one of the very few PNe that have been reported to exhibit the 21 cm H i emission line. As part of a long-term program to search for circumstellar atomic hydrogen, we observed the 21 cm feature toward BD+30°3639 with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). Assuming a direct association between the PN and the detected H i emission, these new observations show that this surrounding emission is significantly more spatially extended than indicated by previous interferometric observations and can be resolved into two velocity components. The estimated H i mass is larger than 100 M ⊙ , invalidating an origin from the host star itself or its ejecta for the emitting material. We discuss the possibility that the extended H i emission stems from the interstellar medium (ISM) swept out over time by the stellar wind. Moreover, we report tentative detections of H i absorption features lying near and blueward of the systemic velocity of this PN, which are probably from a stalled asterosphere at the outer boundary of the expanding ionized region. The mass of the gas producing the H i absorption is insufficient to solve the so-called “PN missing mass problem.” We demonstrate the capability of FAST to investigate the interaction process between a PN and the surrounding ISM.
High-speed silicon-organic hybrid modulator enabled by sub-wavelength grating waveguide ring resonator
Publisher: OSA
Date: 2018
Dynamic modeling of superresolution photoinduced-inhibition nanolithography
Publisher: The Optical Society
Date: 11-07-2012
DOI: 10.1364/OE.20.016871
Near-perfect microlenses based on graphene microbubbles
Publisher: SPIE-Intl Soc Optical Eng
Date: 07-10-2020
Enhanced four-wave mixing in hybrid integrated waveguides with graphene oxide
Publisher: SPIE
Date: 27-02-2019
DOI: 10.1117/12.2508120
Recent advances on optical vortex generation
Publisher: Walter de Gruyter GmbH
Date: 29-08-2018
Abstract: This article reviews recent progress leading to the generation of optical vortex beams. After introducing the basics of optical vortex beams and their promising applications, we summarized different approaches for optical vortex generation by discrete components and laser cavities. We place particular emphasis on the recent development of vortex generation by the planar phase plates, which are able to engineer a spiral phasefront via dynamic or geometric phase in nanoscale, and highlight the independent operation of these two different phases which leads to a multifunctional optical vortex beam generation and independent spin-orbit interaction. We also introduced the recent progress on vortex lasing, including vortex beam generation from the output of bulk lasers by modification of conventional laser cavities with phase elements and from integrated on-chip microlasers. Similar approaches are also applied to generate fractional vortex beams carrying fractional topological charge. The advanced technology and approaches on design and nanofabrications enable multiple vortex beams generation from a single device via multiplexing, multicasting, and vortex array, open up opportunities for applications on data processing, information encoding/decoding, communication and parallel data processing, and micromanipulations.
Direct measurement of a radially polarized focused evanescent field facilitated by a single LCD
Publisher: Optica Publishing Group
Date: 2005
Abstract: In this paper, a tightly focused evanescent field produced by a total internal reflection objective lens under the illumination of a radially polarized beam generated using a single liquid crystal phase modulator is investigated. The field distributions have been directly mapped by a scanning near-field optical microscope. It is demonstrated both theoretically and experimentally that the introduction of radially polarized beam illumination combining with an annular beam illumination exhibits advantages in two aspects. On one hand, it corrects the focus elongation and splitting in a focused evanescent field associated with a linearly polarized beam. On the other hand, it significantly improves the lateral localization to approximately a quarter of the illumination wavelength, which is less than half of the size that is achievable under linearly polarized illumination.
Attributional style and panic disorder
Publisher: Elsevier BV
Date: 03-1990
DOI: 10.1016/0005-7916(90)90043-K
Abstract: This study investigated the relationship between the development of panic disorder and attribution style by administering the Attribution Style Questionnaire (ASQ) to 28 subjects with panic disorder with agoraphobia and 21 subjects with other anxiety disorders who had experienced a panic attack at some time. No significant differences were found between the groups suggesting that cognitive style as assessed by the ASQ may not predispose to the development of panic disorders. A factor analysis of the results indicated that the ASQ may not be appropriate for the assessment of patients with panic disorder. Alternative hypotheses for the development of panic disorder are discussed.
Achieving Large Band Gaps in 2D Symmetric and Asymmetric Photonic Crystals
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2017
Nanophotonics silicon solar cells: status and future challenges
Publisher: Walter de Gruyter GmbH
Date: 2015
Abstract: Light management plays an important role in high-performance solar cells. Nanostructures that could effectively trap light offer great potential in improving the conversion efficiency of solar cells with much reduced material usage. Developing low-cost and large-scale nanostructures integratable with solar cells, thus, promises new solutions for high efficiency and low-cost solar energy harvesting. In this paper, we review the exciting progress in this field, in particular, in the market, dominating silicon solar cells and pointing out challenges and future trends.
Mechanism of Photoinduced Phase Segregation in Mixed-Halide Perovskite Microplatelets and Its Application in Micropatterning
Publisher: American Chemical Society (ACS)
Date: 02-03-2022
Precisely decorating CdS on Zr-MOFs through pore functionalization strategy: A highly efficient photocatalyst for H-2 production
Publisher: Elsevier BV
Date: 09-2022
Self-assembled carbon dot-wrapped perovskites enable light trapping and defect passivation for efficient and stable perovskite solar cells
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TA00036E
Abstract: A strategy to utilize carbon dots for simultaneously improving photovoltaic performance and longevity of metal halide perovskite solar cells.
Effect of information provision on trauma symptoms following therapeutic writing
Publisher: Informa UK Limited
Date: 11-2006
Nanogratings and nanoholes fabricated by direct femtosecond laser writing in chalcogenide glasses
Publisher: Optica Publishing Group
Date: 18-03-2010
DOI: 10.1364/OE.18.006885
Integrated polarizers based on graphene oxide in waveguides and ring resonators
Publisher: SPIE
Date: 18-02-2020
DOI: 10.1117/12.2544584
Plasmonic nanostructures in photodetection, energy conversion and beyond
Publisher: Walter de Gruyter GmbH
Date: 29-06-2020
Abstract: This review article aims to provide a comprehensive understanding of plasmonic nanostructures and their applications, especially on the integration of plasmonic nanostructures into devices. Over the past decades, plasmonic nanostructures and their applications have been intensively studied because of their outstanding features at the nanoscale. The fundamental characteristics of plasmonic nanostructures, in particular, the electric field enhancement, the generation of hot electrons, and thermoplasmonic effects, play essential roles in most of the practical applications. In general, these three main characteristics of plasmonic nanostructures occur concomitantly when electromagnetic waves interact with plasmonic nanostructures. However, comprehensive review investigating these three main effects of plasmonic nanostructures simultaneously remains elusive. In this article, the fundamental characteristics of plasmonic nanostructures are discussed, especially the interactions between electromagnetic waves and plasmonic nanostructures that lead to the change in near-field electric fields, the conversion of photon energy into hot electrons through plasmon decay, and the photothermal effects at the nanoscale. The applications, challenges faced in these three areas and the future trends are also discussed. This article will provide guidance towards integration of plasmonic nanostructures for functional devices for both academic researchers and engineers in the fields of silicon photonics, photodetection, sensing, and energy harvesting.
Internet-delivered indicated prevention for anxiety disorders: A randomized controlled trial
Publisher: Cambridge University Press (CUP)
Date: 07-2003
Dynamic control of magnetization spot arrays with three-dimensional orientations
Publisher: Optica Publishing Group
Date: 05-01-2021
DOI: 10.1364/OE.412260
Abstract: We report a new paradigm for achieving magnetization spot arrays with controllable three-dimensional (3D) orientations. Toward this aim, we subtly design a tailored incident beam containing three parts and further demonstrate that the designed incident beam is phase-modulated radial polarization. Based on the raytracing model under tight focusing condition and the inverse Faraday effect on the magneto-optic (MO) film, the magnetization field components along the y -axis and z -axis directions are generated through the focus. In particular, we are able to garner orientation-tunable 3D magnetization under different numerical apertures of the focusing objectives by adjusting the ratios between the three parts of incident beam. Apart from a single magnetization spot, magnetization spot arrays capable of dynamically controlling 3D orientation in each spot can also be achieved by multi-zone plate (MZP) phase filter. Such a robust magnetization pattern is attributed to not only the constructive interferences of three orthogonal focal field components, but also the position translation of each magnetization spot resulting from shifting phase of the MZP phase filter. It is expected that the research outcomes can be beneficial to spintronics, magnetic encryption and multi-value MO parallelized storage.
The short-EMBU in Australia, Spain, and Venezuela: Factorial invariance, and associations with sex roles, self-esteem, and eysenckian personality dimensions
Publisher: Hogrefe Publishing Group
Date: 2005
DOI: 10.1027/1015-5759.21.1.56
Abstract: Abstract. The short(s)-EMBU (Swedish acronym for Egna Minnen Beträffande Uppfostran [My memories of upbringing]) consists of 23 items, is based on the early 81-item EMBU, and was developed out of the necessity of having a brief measure of perceived parental rearing practices when the clinical and/or research context does not adequately permit application of time-consuming test batteries. The s-EMBU comprises three subscales: Rejection, Emotional Warmth, and (Over)Protection. The factorial and/or construct validity and reliability of the s-EMBU were examined in s les comprising a total of 1950 students from Australia, Spain, and Venezuela. The data were presented for the three national groups separately. Findings confirmed the cross-national validity of the factorial structure underlying the s-EMBU. Rejection by fathers and mothers was consistently associated with high trait-neuroticism and low self-esteem in recipients of both sexes in each nation, as was high parental emotional warmth with high femininity (humility). The findings on factorial validity are in keeping with previous ones obtained in East Germany, Greece, Guatemala, Hungary, Italy, and Sweden. The s-EMBU is again recommended for use in several different countries as a reliable, functional equivalent to the original 81-item EMBU.
Dynamic generation of Debye diffraction-limited multifocal arrays for direct laser printing nanofabrication
Publisher: The Optical Society
Date: 31-01-2011
DOI: 10.1364/OL.36.000406
Double‐Key Optical Information Encryption Enabled by Multi‐State Excitation–Emission of Mn‐Doped Metal Chlorides
Publisher: Wiley
Date: 22-08-2023
The relationship between sensory and sympathetic nervous system changes and posttraumatic stress reaction following whiplash injury-a prospective study
Publisher: Elsevier BV
Date: 04-2006
DOI: 10.1016/J.JPSYCHORES.2005.08.016
Abstract: To investigate differences in sensory and sympathetic nervous system (SNS) function between whiplash-injured persons with and without a posttraumatic stress reaction (PTSR). To explore associations between sensory, SNS function, and persistent PTSR at 6 months postinjury. Seventy-six acutely (<1 month) whiplash-injured persons (10 with PTSR persisting to 6 months postinjury, 14 with early PTSR that resolved, and 52 with no PTSR) were prospectively investigated. Those with persistent PTSR showed sensory hypersensitivity and impaired peripheral vasoconstriction compared to those whose PTSR resolved and those without PTSR (P<.05). The early presence of sensory hypersensitivity was associated with PTSR at 6 months, but this relationship was mediated by pain and disability levels. Impaired vasoconstriction and higher pain and disability levels were associated with PTSR at 6 months. Sensory disturbances following whiplash injury are associated with persistent PTSR but may be mediated by levels of pain and disability.
Large third-order optical Kerr nonlinearity in 2D PdSe2 dichalcogenide films for nonlinear photonic devices
Publisher: SPIE
Date: 05-03-2021
DOI: 10.1117/12.2584029
Three-dimensional hybrid photonic crystals merged with localized plasmon resonances
Publisher: Optica Publishing Group
Date: 19-02-2010
DOI: 10.1364/OE.18.004491
Full-Stokes Polarization Perfect Absorption with Diatomic Metasurfaces
Publisher: American Chemical Society (ACS)
Date: 13-01-2021
Body weight, body image, and eating behaviours: Relationships with ethnicity and acculturation in a community sample of young Australian women
Publisher: Elsevier BV
Date: 09-2002
DOI: 10.1016/S1471-0153(02)00062-4
Abstract: A study was conducted to investigate associations between ethnicity and acculturation status and risk factors for eating disorders among young adult women. A community s le of 14,779 women aged 18-23 completed a comprehensive mail-out survey, which incorporated questions on country of birth, length of time spent in Australia, body weight, weight dissatisfaction, dieting, binge eating, and compensatory disordered eating behaviours. Results showed that risk factors for eating disorders were present across a range of ethnic groups. Further, a strong acculturation effect was observed, such that the longer the time spent in Australia, the more women reported weight-related values and behaviours similar to those of Australian-born women. Results challenge claims that risk factors for disordered eating are restricted to Caucasian females in Western societies. Implications for understanding ethnic and sociocultural influences on body weight, dieting, and disordered eating are considered.
More on the clinical and scientific relevance of 'symptom amplification' and psychological factors in pain [1] (multiple letters)
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 07-2004
Polarization characterization in the focal volume of high numerical aperture objectives
Publisher: Optica Publishing Group
Date: 10-05-2010
DOI: 10.1364/OE.18.010813
Multiple session early psychological intervention to prevent and treat post-traumatic stress disorder
Publisher: John Wiley & Sons, Ltd
Date: 08-07-2009
Smart Solar-Metal-Air Batteries Based on BiOCl Photocorrosion for Monolithic Solar Energy Conversion and Storage
Publisher: Research Square Platform LLC
Date: 03-08-2021
DOI: 10.21203/RS.3.RS-689298/V1
Abstract: Solar energy generation and storage are two distinct processes and integrating them in a single device is of great challenge. Herein, BiOCl hydrogel film electrode featuring excellent photocorrosion and regeneration properties acts as the anode to construct a novel type of smart Solar-Metal-Air Batteries (SMABs), which combine the characteristics of solar cell (direct photovoltaic conversion) and metal-air battery (electric energy storage and release interacting with atmosphere). The cyclic photocorrosion processes between BiOCl (Bi 3+ ) and Bi can simply be achieved by solar light illuminating and standing in dark, corresponding to the charging and discharging processes of the battery, respectively. Upon illumination, the device takes open-circuit configuration to charge itself from the sunlight. Photogenerated electrons in the conduction band of BiOCl reduce Bi 3+ to Bi 0 following the photocorrosion process of BiOCl and in the meantime, photogenerated positive charges (holes) initiate the oxygen evolution reaction to produce O 2 . Notably, in this system, the converted solar energy can be stored in the SMABs without the need of external batteries to store the electricity like those for the traditional solar cells. In the discharging process in the dark, Bi 0 spontaneously turns back to Bi 3+ producing electrons to induce oxygen reduction reaction occurring at the counter electrode (Pt/C) like metal-air battery. With an illumination of 15 min, the battery with an electrode area of 1 cm 2 can be continuously discharged for approximately 3,000 s, demonstrating a theoretical capacity of 384.75 mAh·g − 1 , which is higher than the theoretical capacity of lithium-ion batteries (LiCoO 2 , 274 mAh·g − 1 ). This novel type of SMABs is developed for the first time based on the unique photocorrosive and self-oxidation reaction of BiOCl to achieve photochemical energy generation and storage. The revealed fundamental mechanism and proposed device design create new solutions to the renewable energy harvesting and storage field. This class of solar light direct-charging battery is an effective step to fulfill the need for green and sustainable energy developments and exhibits great promise for the commercial market.
Anisotropic Third-Order Nonlinearity in Pristine and Lithium Hydride Intercalated Black Phosphorus
Publisher: American Chemical Society (ACS)
Date: 07-11-2018
Engineering Bismuth–Tin Interface in Bimetallic Aerogel with a 3D Porous Structure for Highly Selective Electrocatalytic CO2 Reduction to HCOOH
Publisher: Wiley
Date: 26-04-2021
Perovskite-based low-cost and high-efficiency hybrid halide solar cells
Publisher: Optica Publishing Group
Date: 11-08-2014
DOI: 10.1364/PRJ.2.000111
Height/width aspect ratio controllable two-dimensional sub-micron arrays fabricated with two-photon photopolymerization
Publisher: Elsevier BV
Date: 2004
Flexibly tunable high-quality-factor induced transparency in plasmonic systems
Publisher: Springer Science and Business Media LLC
Date: 24-01-2018
DOI: 10.1038/S41598-018-19869-Y
Abstract: The quality (Q) factor and tunability of electromagnetically induced transparency (EIT)-like effect in plasmonic systems are restrained by the intrinsic loss and weak adjustability of metals, limiting the performance of the devices including optical sensor and storage. Exploring new schemes to realize the high Q-factor and tunable EIT-like effect is particularly significant in plasmonic systems. Here, we present an ultrahigh Q-factor and flexibly tunable EIT-like response in a novel plasmonic system. The results illustrate that the induced transparency distinctly appears when surface plasmon polaritons excited on the metal satisfy the wavevector matching condition with the guided mode in the high-refractive index (HRI) layer. The Q factor of the EIT-like spectrum can exceed 2000, which is remarkable compared to that of other plasmonic systems such as plasmonic metamaterials and waveguides. The position and lineshape of EIT-like spectrum are strongly dependent on the geometrical parameters. An EIT pair is generated in the splitting absorption spectra, which can be easily controlled by adjusting the incident angle of light. Especially, we achieve the dynamical tunability of EIT-like spectrum by changing the Fermi level of graphene inserted in the system. Our results will open a new avenue toward the plasmonic sensing, spectral shaping and switching.
First-row transition metal compounds for aqueous metal ion batteries
Publisher: Elsevier BV
Date: 12-2021
Two-Dimensional CH3NH3PbI3 Perovskite Nanosheets for Ultrafast Pulsed Fiber Lasers
Publisher: American Chemical Society (ACS)
Date: 29-03-2017
Abstract: Even though the nonlinear optical effects of solution processed organic-inorganic perovskite films have been studied, the nonlinear optical properties in two-dimensional (2D) perovskites, especially their applications for ultrafast photonics, are largely unexplored. In comparison to bulk perovskite films, 2D perovskite nanosheets with small thicknesses of a few unit cells are more suitable for investigating the intrinsic nonlinear optical properties because bulk recombination of photocarriers and the nonlinear scattering are relatively small. In this research, we systematically investigated the nonlinear optical properties of 2D perovskite nanosheets derived from a combined solution process and vapor phase conversion method. It was found that 2D perovskite nanosheets have stronger saturable absorption properties with large modulation depth and very low saturation intensity compared with those of bulk perovskite films. Using an all dry transfer method, we constructed a new type of saturable absorber device based on single piece 2D perovskite nanosheet. Stable soliton state mode-locking was achieved, and ultrafast picosecond pulses were generated at 1064 nm. This work is likely to pave the way for ultrafast photonic and optoelectronic applications based on 2D perovskites.
Analysis of Four-Wave Mixing in Silicon Nitride Waveguides Integrated With 2D Layered Graphene Oxide Films
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2021
Synergy of Bi2O3 and RuO2 Nanocatalysts for Low-Overpotential and Wide pH-Window Electrochemical Ammonia Synthesis
Publisher: Wiley
Date: 05-11-2021
Abstract: Electrocatalytic nitrogen reduction reaction (NRR) under ambient conditions is still seriously impeded by the inferior NH 3 yield and low Faradaic efficiency, especially at low overpotentials. Herein, we report the synthesis of nano‐sized RuO 2 and Bi 2 O 3 particles grown on functionalized exfoliated graphene (FEG) through in situ electrodeposition, denoted as RuO 2 −Bi 2 O 3 /FEG. The prepared self‐supporting RuO 2 −Bi 2 O 3 /FEG hybrid with a Bi mass loading of 0.70 wt% and Ru mass loading of 0.04 wt% shows excellent NRR performance at low overpotentials in acidic, neutral and alkaline electrolytes. It achieves a large NH 3 yield of 4.58±0.16 μg NH3 h −1 cm −2 with a high Faradaic efficiency of 14.6 % at −0.2 V versus reversible hydrogen electrode in 0.1 M Na 2 SO 4 electrolyte. This performance benefits from the synergistic effect between Bi 2 O 3 and RuO 2 which respectively have a fairly strong interaction of Bi 6p orbitals with the N 2p band and abundant supply of *H, as well as the binder‐free characteristic and the convenient electron transfer via graphene nanosheets. This work highlights a new electrocatalyst design strategy that combines transition and main‐group metal elements, which may provide some inspirations for designing low‐cost and high‐performance NRR electrocatalysts in the future.
CHARGE CARRIER AND MOBILE ION DYNAMIC PROCESSES IN PEROVSKITE SOLAR CELLS: PROGRESS AND PROSPECT
Publisher: AIP Publishing LLCMelville, New York
Date: 30-12-2020
DOI: 10.1063/9780735422414_002
Abstract: Perovskite solar cells have achieved emerging conversion efficiency exceeding 25% in less than one decade, comparable to the record efficiency of silicon solar cells. Therefore perovskites attract considerable research interest as excellent materials of light-harvesting due to their great potential for the next generation of high-efficiency low-cost photovoltaics, in particular flexible solar cells that fill the gap of silicon photovoltaics. The excellent performance of photovoltaics is generally ascribed to the unique optoelectronic properties, which also make perovskites excellent candidates for other photonics applications. Charge carrier dynamics are significantly relevant to the conversion efficiency of a solar cell, and therefore the charge carrier dynamics have been intensively investigated in recent years by various time-resolved spectroscopic techniques. Different from the conventional semiconductors, perovskites are mixed ionic–electronic conductors, and mobile ions play important roles in the performance of the photovoltaics. The interaction between mobile ions and charge carriers exhibit a significant impact on the carrier dynamics and eventually on the conversion efficiency and stability of performance. This chapter reviews the progress of the investigation of charge carriers in perovskite photovoltaics. In the femtosecond timescale, a significantly slowed cooling of hot carriers is confirmed, which is promising to hot carrier solar cells and probably high-efficiency photocatalysis in the future. Charge carrier recombination has been intensively investigated. Defect trapping, charge carrier transport and transfer, and carrier recombination in the interface are closely relevant to the conversion efficiency and stability. Mobile ions are confirmed to play an important role in the carrier dynamics in the macroscopic timescale. I-V hysteresis and stability of the performance are usually considered to correlate to the mobile ions. In the final section, we discuss the problems that require urgent attention in perovskite solar cells for performance improvement and commercialization.
Multiple session early psychological intervention to prevent and treat post-traumatic stress disorder
Publisher: John Wiley & Sons, Ltd
Date: 23-01-2008
Hybridized Graphene for Supercapacitors: Beyond the Limitation of Pure Graphene
Publisher: Wiley
Date: 26-02-2021
Abstract: Graphene‐based supercapacitors have been attracting growing attention due to the predicted intrinsic high surface area, high electron mobility, and many other excellent properties of pristine graphene. However, experimentally, the state‐of‐the‐art graphene electrodes face limitations such as low surface area, low electrical conductivity, and low capacitance, which greatly limit their electrochemical performances for supercapacitor applications. To tackle these issues, hybridizing graphene with other species (e.g., atom, cluster, nanostructure, etc.) to enlarge the surface area, enhance the electrical conductivity, and improve capacitance behaviors are strongly desired. In this review, different hybridization principles (spacers hybridization, conductors hybridization, heteroatoms doping, and pseudocapacitance hybridization) are discussed to provide fundamental guidance for hybridization approaches to solve these challenges. Recent progress in hybridized graphene for supercapacitors guided by the above principles are thereafter summarized, pushing the performance of hybridized graphene electrodes beyond the limitation of pure graphene materials. In addition, the current challenges of energy storage using hybridized graphene and their future directions are discussed.
Integrated Wavelength Beam Emitter on Silicon for Two-Dimensional Optical Scanning
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2019
Multiple Metasomatism beneath the Nógrád–Gömör Volcanic Field (Northern Pannonian Basin) Revealed by Upper Mantle Peridotite Xenoliths
Publisher: Oxford University Press (OUP)
Date: 06-2017
Broadband optical absorptions in inversed woodpile metallic photonic crystals
Publisher: The Optical Society
Date: 02-07-2012
DOI: 10.1364/OME.2.000996
Attribution of panic attacks: Patient perspective
Publisher: Elsevier BV
Date: 1988
Eating, mood, and gender in a noneating disorder population
Publisher: Elsevier BV
Date: 08-2003
Enhanced Kerr Optical Nonlinearity of Waveguides Integrated with Graphene Oxide
Publisher: IEEE
Date: 08-2019
Fabrication and Characterization of 2D Layered Perovskites with a Gradient Band Gap
Publisher: American Chemical Society (ACS)
Date: 19-07-2023
Tailoring reduction extent of flash-reduced graphene oxides for high performance supercapacitors
Publisher: Elsevier BV
Date: 12-2020
Enhanced Spectral Broadening with Femtosecond Optical Pulses in Silicon Nanowires with Integrated 2D Graphene Oxide Films
Publisher: MDPI AG
Date: 25-04-2022
Resilient Graphene Ultrathin Flat Lens in Aerospace, Chemical, and Biological Harsh Environments
Publisher: American Chemical Society (ACS)
Date: 07-05-2019
Abstract: The development of ultrathin flat lenses has revolutionized the lens technologies and holds great promise for miniaturizing the conventional lens system in integrated photonic applications. In certain applications, the lenses are required to operate in harsh and/or extreme environments, for ex le aerospace, chemical, and biological environments. Under such circumstances, it is critical that the ultrathin flat lenses can be resilient and preserve their outstanding performance. However, the majority of the demonstrated ultrathin flat lenses are based on metal or semiconductor materials that have poor chemical, thermal, and UV stability, which limit their applications. Herein, we experimentally demonstrate a graphene ultrathin flat lens that can be applied in harsh environments for different applications, including a low Earth orbit space environment, strong corrosive chemical environments (pH = 0 and pH = 14), and biochemical environment. The graphene lenses have extraordinary environmental stability and can maintain a high level of structural integrity and outstanding focusing performance under different test conditions. Thus, it opens tremendous practical application opportunities for ultrathin flat lenses.
2D Layered Graphene Oxide Films Integrated with Micro‐Ring Resonators for Enhanced Nonlinear Optics
Publisher: Wiley
Date: 11-03-2020
Experimental investigation of the composition of incipient melts in upper mantle peridotites in the presence of CO2 and H2O
Publisher: Elsevier BV
Date: 09-2021
Primary Melt Compositions in the Earth's Mantle
Publisher: Elsevier
Date: 2018
Enhanced Kerr nonlinear performance in graphene oxide-coated silicon and silicon nitride waveguides
Publisher: Optica Publishing Group
Date: 2021
DOI: 10.1364/CLEO_SI.2021.SF2O.7
Abstract: Graphene oxide films are integrated with silicon and silicon nitride waveguides to demonstrate enhanced Kerr nonlinearity. Self-phase modulation with a broadening factor of 4.34 and four-wave mixing with ~9.1 dB conversion efficiency improvement are achieved.
Engineering stop gaps of inorganic-organic polymeric 3D woodpile photonic crystals with post-thermal treatment
Publisher: Optica Publishing Group
Date: 20-11-2008
DOI: 10.1364/OE.16.020073
Abstract: A method is reported for improving the spatial resolution and engineering the stop gaps of the inorganic-organic 3D woodpile photonic crystals (PhCs). The approach is based on the two-photon polymerization (2PP) of an inorganic-organic hybrid material and a post-thermal treatment (PTT) process. The effects of PTT on polymerized 1D, 2D and 3D structures have been characterized. Ultimately, the feature size of the suspended rods has been reduced to approximately 33 nm and the spatial resolution of inorganic-organic 3D woodpile PhCs has been improved from approximately 150 nm to approximately 86 nm. The approach is also demonstrated as a powerful tool to engineer the stop gaps of 3D PhCs. In particular, a combination of PTT and the threshold fabrication technique leads to the stop gap of a 3D woodpile PhC that can be tuned over a large wavelength range of approximately 318 nm from the near-infrared to visible region.
A Metamaterial Emitter for Highly Efficient Radiative Cooling
Publisher: Wiley
Date: 02-04-2015
Carbonized polymer dots derived from metformin and l -arginine for tumor cell membrane- and mitochondria-dual targeting therapy
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3NR04145J
Graphene-Based Multilayered Metamaterials with Phototunable Architecture for on-Chip Photonic Devices
Publisher: American Chemical Society (ACS)
Date: 27-02-2019
Nonlinear Nanocomposites for Three-Dimensional Photonic Crystals Using Two-Photon Polymerization
Publisher: OSA
Date: 2010
The temporal development of fatty infiltrates in the neck muscles following whiplash injury: An association with pain and posttraumatic stress
Publisher: Public Library of Science (PLoS)
Date: 16-06-2011
Solar Energy Catalysis
Publisher: Wiley
Date: 31-05-2022
Abstract: When it comes to using solar energy to promote catalytic reactions, photocatalysis technology is the first choice. However, sunlight can not only be directly converted into chemical energy through a photocatalytic process, it can also be converted through different energy‐transfer pathways. Using sunlight as the energy source, photocatalytic reactions can proceed independently, and can also be coupled with other catalytic technologies to enhance the overall catalytic efficiency. Therefore, sunlight‐driven catalytic reactions are erse, and need to be given a specific definition. We propose a timely perspective for catalytic reactions driven by sunlight and give them a specific definition, namely “solar energy catalysis”. The concept of different types of solar energy catalysis, such as photocatalysis, photothermal catalysis, solar cell powered electrocatalysis, and pyroelectric catalysis, are highlighted. Finally, their limitations and future research directions are discussed.
Determining In-Plane Carrier Diffusion in Two-Dimensional Perovskite Using Local Time-Resolved Photoluminescence
Publisher: American Chemical Society (ACS)
Date: 13-05-2020
Thickness tunable Kerr nonlinearity in BiOBr nanoflakes
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.C10G_1
Abstract: We report a high Kerr optical nonlinearity in BiOBr nanoflakes that varies with thickness via Z-Scan technique. We integrate BiOBr nanoflakes onto silicon nanowires and characterize the linear optical properties of the hybrid integrated devices. © 2020 The Author(s)
Enhanced Supercontinuum Generation in Integrated Waveguides Incorporated with Graphene Oxide Films
Publisher: Wiley
Date: 25-01-2023
Abstract: Enhanced supercontinuum generation (SCG) is experimentally demonstrated in integrated silicon nitride (Si 3 N 4 ) waveguides incorporating highly nonlinear graphene oxide (GO) in the form of 2D films. On‐chip integration of the 2D GO films with precise control of their thickness is realized by using a transfer‐free and layer‐by‐layer coating method. The control of the film length and coating position is achieved via window opening in the upper silica cladding of the photonic integrated chips. Detailed SCG measurements are performed using the fabricated devices with different waveguide geometries and GO film thicknesses, and the results are compared with devices without GO. Significantly improved spectral broadening of ultrashort optical pulses with ultrahigh peak powers exceeding 1000 W is observed for the hybrid devices, achieving up to 2.4 times improvement in the spectral bandwidth relative to devices without GO. Theoretical analyses for the influence of GO film thickness, coating length, coating position, and waveguide geometry are also provided by fitting the experimental results with theory, showing that there is still significant room for further improvement. This work opens up a new avenue toward improving the SCG performance of photonic integrated devices by incorporating functional 2D materials.
Strong third-order Kerr nonlinearity in 2D PdSe2 dichalcogenide films
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.C10G_3
Abstract: We characterize the third-order optical nonlinearity in PdSe 2 dichalcogenide films via the Z-Scan technique. A strong and negative (self-defocusing) Kerr nonlinearity ( n 2 ) of ∼ ‒ 7.65×10 -16 m 2 /W is observed at 800 nm. © 2020 The Author(s)
The current status of psychological debriefing
Publisher: BMJ
Date: 28-10-2000
New photoresists for super-resolution photo-inhibition nanofabrication
Publisher: IEEE
Date: 08-2011
Ultrahigh heating rate induced micro-explosive production of graphene for energy storage
Publisher: Elsevier BV
Date: 12-2019
Traumatic Injury and Traumatic Stress
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 12-2011
Multifunctional graphene oxide paper embodied structural dielectric capacitor based on carbon fibre reinforced composites
Publisher: Elsevier BV
Date: 07-2018
Orientation-dependent local density of states in three-dimensional photonic crystals
Publisher: American Physical Society (APS)
Date: 06-01-2012
2D optical materials and the implications for photonics
Publisher: AIP Publishing
Date: 08-2019
DOI: 10.1063/1.5120030
Abstract: The successful exfoliation of monolayer graphene has triggered eruptive research and development efforts of two-dimensional (2D) materials in the formats of monolayers, bilayers, few layers, and heterostructures. With properties distinct from their bulk counterparts, 2D materials enable tightly confined light and phonons, unprecedentedly controlled electrons, spins, and excitons, which evoke fundamental new science and offer new paradigm technologies for highly integrated multifunctional optoelectronic devices. In this editorial, we briefly review the interesting new advances in the past few years and highlight the remaining challenges and identified opportunities. As a dedicated research journal serving the photonics community, APL Photonics eagerly looks forward to seeing more exciting findings in the 2D material photonics area to be disseminated in such an excellent platform over the coming years.
Zinc Anode for Mild Aqueous Zinc-Ion Batteries: Challenges, Strategies, and Perspectives
Publisher: Springer Science and Business Media LLC
Date: 03-01-2022
DOI: 10.1007/S40820-021-00782-5
Abstract: The rapid advance of mild aqueous zinc-ion batteries (ZIBs) is driving the development of the energy storage system market. But the thorny issues of Zn anodes, mainly including dendrite growth, hydrogen evolution, and corrosion, severely reduce the performance of ZIBs. To commercialize ZIBs, researchers must overcome formidable challenges. Research about mild aqueous ZIBs is still developing. Various technical and scientific obstacles to designing Zn anodes with high stripping efficiency and long cycling life have not been resolved. Moreover, the performance of Zn anodes is a complex scientific issue determined by various parameters, most of which are often ignored, failing to achieve the maximum performance of the cell. This review proposes a comprehensive overview of existing Zn anode issues and the corresponding strategies, frontiers, and development trends to deeply comprehend the essence and inner connection of degradation mechanism and performance. First, the formation mechanism of dendrite growth, hydrogen evolution, corrosion, and their influence on the anode are analyzed. Furthermore, various strategies for constructing stable Zn anodes are summarized and discussed in detail from multiple perspectives. These strategies are mainly ided into interface modification, structural anode, alloying anode, intercalation anode, liquid electrolyte, non-liquid electrolyte, separator design, and other strategies. Finally, research directions and prospects are put forward for Zn anodes. This contribution highlights the latest developments and provides new insights into the advanced Zn anode for future research.
The use of a real-time computer diary for data acquisition and processing
Publisher: Elsevier BV
Date: 1990
DOI: 10.1016/0005-7967(90)90061-M
Abstract: Behavioural researchers have long relied on the use of diaries for the collection of self-report data. We discuss the characteristics of a programmable hand-held computer used to collect hourly and event generated data for 7 days on 20 subjects with panic disorder. In the application described, subjects answered a series of 19 or more questions on the hour from 0700 to 2300 or when they were having a panic attack. Subjects completed 88% of all the hourly ratings (range 64-98%). The system was well accepted by the subjects and provided relatively inexpensive data collection and management.
Optimized Electroless Silver Coating for Optical and Plasmonic Applications
Publisher: Springer Science and Business Media LLC
Date: 18-03-2012
Challenges in the development of metal-halide perovskite single crystal solar cells
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2TA08827D
Abstract: Metal halide perovskites (MHPs), as a new generation optoelectronic materials, have attracted a surge of attention due to their remarkable intrinsic properties.
Predicting children's post-traumatic stress symptoms following hospitalization for accidental injury: Combining the Child Trauma Screening Questionnaire and heart rate
Publisher: Elsevier BV
Date: 12-2008
DOI: 10.1016/J.JANXDIS.2008.02.007
Abstract: This study investigated the utility of combining the Child Trauma Screening Questionnaire (CTSQ) [Kenardy, J. A., Spence, S. H., & Macleod, A. C. (2006). Screening for post-traumatic stress disorder in children after accidental injury. Pediatrics, 118, 1002-1009] and children's heart rate (HR emergency department and 24-h post-admission) to identify children likely to develop post-traumatic stress disorder (PTSD) symptoms at 1 and 6 months post-injury. Children completed the CTSQ within 2 weeks of injury. PTSD symptoms were assessed with the Anxiety Disorders Interview Schedule for DSM-IV [Silverman, W. K., & Albano, A. M. (1996). Anxiety Disorders Interview Schedule for DSM-IV, Child Version, Parent Interview Schedule. Orlando, Florida: The Psychological Corporation], for 79 children aged 7-16 years. A combination of the CTSQ plus HR (CTSQ-HR) was better than the CTSQ alone or HR alone at identifying children likely to develop PTSD symptoms. These findings suggest that the CTSQ-HR screen may increase identification of children who are likely to develop PTSD symptoms, enabling development of targeted prevention programs.
Ampoule method fabricated sulfur vacancy-rich N-doped ZnS electrodes for ammonia production in alkaline media
Publisher: Springer Science and Business Media LLC
Date: 12-04-2021
DOI: 10.1007/S40243-021-00193-X
Abstract: The electrochemical production of green and low-cost ammonia requests the development of high-performance electrocatalysts. In this work, the oule method was applied to modulate the surface of the zinc electrode by implanting defects and low-valent active sites. The N-doped ZnS electrocatalyst was thus generated by sulfurization with thiourea and applied for electrocatalytic nitrogen reduction reaction (ENRR). Given the rich sulfur vacancies and abundant Zn-N active sites on the surface, excellent catalytic activity and selectivity were obtained, with an NH 3 yield rate of 2.42 × 10 –10 mol s −1 cm −2 and a Faradaic efficiency of 7.92% at − 0.6 V vs. RHE in 0.1 M KOH solution. Moreover, the as-synthesized zinc electrode exhibits high stability after five recycling tests and a 24 h potentiostatic test. The comparison with Zn foil, non-doping ZnS/Zn and recent metal sulfide electrocatalysts further demonstrated advanced catalytic performance of N@ZnS/Zn for ENRR. By simple synthesis, S vacancies, and N-doping defects, this promising electrocatalyst would represent a good addition to the arena of transition-metal-based catalysts with superior performance in ENRR. Graphic abstract
Enhancement of spontaneous emission in three-dimensional low refractive-index photonic crystals with designed defects
Publisher: AIP Publishing
Date: 13-08-2012
DOI: 10.1063/1.4745923
Phobic anxiety in 11 nations: part II. Hofstede’s dimensions of national cultures predict national-level variations
Publisher: Elsevier BV
Date: 08-2004
THE IMPORTANCE OF COGNITIONS IN PANIC ATTACKS
Publisher: Elsevier BV
Date: 1988
Multiple session early psychological interventions for the prevention of post-traumatic stress disorder
Publisher: Wiley
Date: 08-07-2009
Development of motor system dysfunction following whiplash injury
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 05-2003
DOI: 10.1016/S0304-3959(02)00420-7
Abstract: Dysfunction in the motor system is a feature of persistent whiplash associated disorders. Little is known about motor dysfunction in the early stages following injury and of its progress in those persons who recover and those who develop persistent symptoms. This study measured prospectively, motor system function (cervical range of movement (ROM), joint position error (JPE) and activity of the superficial neck flexors (EMG) during a test of cranio-cervical flexion) as well as a measure of fear of re-injury (TAMPA) in 66 whiplash subjects within 1 month of injury and then 2 and 3 months post injury. Subjects were classified at 3 months post injury using scores on the neck disability index: recovered ( 30). Motor system function was also measured in 20 control subjects. All whiplash groups demonstrated decreased ROM and increased EMG (compared to controls) at 1 month post injury. This deficit persisted in the group with moderate/severe symptoms but returned to within normal limits in those who had recovered or reported persistent mild pain at 3 months. Increased EMG persisted for 3 months in all whiplash groups. Only the moderate/severe group showed greater JPE, within 1 month of injury, which remained unchanged at 3 months. TAMPA scores of the moderate/severe group were higher than those of the other two groups. The differences in TAMPA did not impact on ROM, EMG or JPE. This study identifies, for the first time, deficits in the motor system, as early as 1 month post whiplash injury, that persisted not only in those reporting moderate/severe symptoms at 3 months but also in subjects who recovered and those with persistent mild symptoms.
Graphene oxide thin film structural dielectric capacitors for aviation static electricity harvesting and storage
Publisher: Elsevier BV
Date: 11-2020
Multiple session early psychological interventions for the prevention of post-traumatic stress disorder
Publisher: Wiley
Date: 08-08-2019
Observation of the inverse Doppler effect in negative-index materials at optical frequencies
Publisher: Springer Science and Business Media LLC
Date: 06-03-2011
Purpose-built, Web-based Professional Portfolios: Reflective, Developmental and Showcase
Publisher: Edith Cowan University
Date: 05-2017
A novel cover material improves cooling energy and fertigation efficiency for glasshouse eggplant production
Publisher: Elsevier BV
Date: 07-2022
Giant third-order nonlinearity from low-loss electrochemical graphene oxide film with a high power stability
Publisher: AIP Publishing
Date: 28-11-2016
DOI: 10.1063/1.4969068
Abstract: Giant third-order nonlinear absorption and refraction of electrochemical graphene oxide (EGO) film were investigated in the femtosecond regime using the single beam Z-scan technique. The excellent chemical stability of the EGO film under high-power illumination up to 400 mJ/cm2 is demonstrated, which can be attributed to the low oxidation degree revealed by the optical and Raman spectroscopies. High and broadband linear transmission over 70% has been observed from the visible to the infrared range. The low-loss EGO film with giant third-order nonlinearity, excellent chemical stability, large-scale preparation and flexible integration has a great potential for high-power nonlinear optical applications.
Research in anxiety and fear: An australian perspective
Publisher: Cambridge University Press (CUP)
Date: 09-1991
All-optical switch with 1 ps response time enabled by graphene oxide infiltrated subwavelength grating waveguide
Publisher: SPIE
Date: 20-02-2017
DOI: 10.1117/12.2252640
Transient Energy Reservoir in 2D Perovskites
Publisher: Wiley
Date: 20-08-2019
Structured graphene metamaterial selective absorbers for high efficiency and omnidirectional solar thermal energy conversion
Publisher: Springer Science and Business Media LLC
Date: 13-03-2020
DOI: 10.1038/S41467-020-15116-Z
Abstract: An ideal solar-thermal absorber requires efficient selective absorption with a tunable bandwidth, excellent thermal conductivity and stability, and a simple structure for effective solar thermal energy conversion. Despite various solar absorbers having been demonstrated, these conditions are challenging to achieve simultaneously using conventional materials and structures. Here, we propose and demonstrate three-dimensional structured graphene metamaterial (SGM) that takes advantages of wavelength selectivity from metallic trench-like structures and broadband dispersionless nature and excellent thermal conductivity from the ultrathin graphene metamaterial film. The SGM absorbers exhibit superior solar selective and omnidirectional absorption, flexible tunability of wavelength selective absorption, excellent photothermal performance, and high thermal stability. Impressive solar-to-thermal conversion efficiency of 90.1% and solar-to-vapor efficiency of 96.2% have been achieved. These superior properties of the SGM absorber suggest it has a great potential for practical applications of solar thermal energy harvesting and manipulation.
Engineering local environment of ruthenium by defect-tuned SnO2 over carbon cloth for neutral-media N2 electroreduction
Publisher: Elsevier BV
Date: 08-2022
Psychosocial Sequelae of the 1989 Newcastle Earthquake: I. Community Disaster Experiences and Psychological Morbidity 6 Months Post-Disaster
Publisher: Cambridge University Press (CUP)
Date: 05-1995
DOI: 10.1017/S0033291700033468
Abstract: A stratified random s le of 3007 Australian adults completed a screening questionnaire 6 months after the 1989 Newcastle earthquake. Information was obtained on initial earthquake experiences and reactions, use of specific services, social support, coping strategies and psychological morbidity. This questionnaire was the first phase of the Quake Impact Study, a longitudinal project investigating the psychosocial impact of the earthquake. Two weighted indices of exposure were developed: a threat index, which measured exposure to injury or the possibility of injury and a disruption index, which measured experiences of property damage, displacement and other losses. Levels of exposure to threat and disruption events were significant predictors of morbidity on both the General Health Questionnaire and Impact of Event Scale, as were coping style and gender. Effects of exposure to threat and disruption were largely additive, with higher exposure being associated with greater use of support services, higher perceived stressfulness and more severe psychological morbidity. Use of avoidance as a coping strategy, female gender, lower social support and being older were also associated with higher post-disaster psychological distress. It was estimated that 14·8% of the population was exposed to high levels of threat or disruption, of whom approximately 25% experienced moderate to severe psychological distress as a direct result of the disaster. It was further estimated that 18·3% of those exposed to high levels of threat were at risk of developing post-traumatic stress disorder, representing approximately 2% of the city's adult population.
Early psychological interventions to treat acute traumatic stress symptoms.
Publisher: Wiley
Date: 17-03-2010
Enhanced nonlinear optics in nanowires, waveguides, and ring resonators integrated with graphene oxide films
Publisher: SPIE
Date: 05-03-2022
DOI: 10.1117/12.2607904
Broadband graphene oxide anti-reflection coating on silicon nanostructures
Publisher: OSA
Date: 2017
Multimodality Across Classrooms
Publisher: Routledge
Date: 14-08-2018
Ultraviolet Plasmonic Aluminium Nanoparticles for Highly Efficient Light Incoupling on Silicon Solar Cells
Publisher: MDPI AG
Date: 24-05-2016
DOI: 10.3390/NANO6060095
Computational Investigation of MgH2/Graphene Heterojunctions for Hydrogen Storage
Publisher: American Chemical Society (ACS)
Date: 20-01-2021
Graphene oxide thin films for functional photonic devices
Publisher: OSA
Date: 2016
All-angle negative refraction flatlens with a broad bandwidth
Publisher: Elsevier BV
Date: 11-2017
Electrocatalytic CO2 reduction towards industrial applications
Publisher: Wiley
Date: 15-06-2022
DOI: 10.1002/CEY2.230
Abstract: Recently, research on the electrocatalytic CO 2 reduction reaction (eCO 2 RR) has attracted considerable attention due to its potential to resolve environmental problems caused by CO 2 while utilizing clean energy and producing high‐value‐added products. Considerable theoretical research in the lab has demonstrated its feasibility and prospect. However, industrialization is mandatory to realize the economic and social value of eCO 2 RR. For industrial application of eCO 2 RR, more criteria have been proposed for eCO 2 RR research, including high current density (above 200 mA cm −2 ), high product selectivity (above 90%), and long‐term stability. To fulfill these criteria, the eCO 2 RR system needs to be systematically designed and optimized. In this review, recent research on eCO 2 RR for industrial applications is summarized. The review starts with focus on potential industrial catalysts in eCO 2 RR. Next, potential industrial products are proposed in eCO 2 RR. These products, including carbon monoxide, formic acid, ethylene, and ethanol, all have high market demand, and have shown high current density and product selectivity in theoretical research. Notably, the innovative components and strategy for industrializing the eCO 2 RR system are also highlighted here, including flow cells, seawater electrolytes, solid electrolytes, and a two‐step method. Finally, some instructions and possible future avenues are presented for the prospects of future industrial application of eCO 2 RR.
Information-provision intervention for children and their parents following pediatric accidental injury
Publisher: Springer Science and Business Media LLC
Date: 18-03-2008
Beyond Phototherapy: Recent Advances in Multifunctional Fluorescent Nanoparticles for Light‐Triggered Tumor Theranostics
Publisher: Wiley
Date: 16-08-2018
In Situ Third‐Order Non‐linear Responses During Laser Reduction of Graphene Oxide Thin Films Towards On‐Chip Non‐linear Photonic Devices
Publisher: Wiley
Date: 17-03-2014
Abstract: High-quality continuous (GO) thin films are prepared by a self-assembly method. Z-scan measurements during the laser-induced reduction process unveil in situ nonlinear responses in the GO film. Third-order nonlinear responses of the GO film can be tuned dynamically by varying the laser input fluence. GO thin films with tunable nonlinear responses and versatile patterning opportunities by using direct laser writing may serve as promising solid-state materials for novel nonlinear functional devices.
Bismuth stabilized by ZIF derivatives for electrochemical ammonia production: Proton donation effect of phosphorus dopants
Publisher: Springer Science and Business Media LLC
Date: 22-08-2022
Enhanced optical nonlinearities of hybrid graphene oxide films functionalized with gold nanoparticles
Publisher: AIP Publishing
Date: 20-07-2015
DOI: 10.1063/1.4927387
Abstract: We report a flexible method to functionalize highly transparent graphene oxide (GO) film with gold nanoparticles (AuNPs). Nonlinear absorption and refraction of the hybrid films are measured, which are strongly enhanced and tunable by different AuNP concentrations compared to both GO and AuNP-only s les. The enhanced nonlinearity is due to the effective functionalization of the hybrid films, which is verified by the ultraviolet-visible and Fourier-transform infrared spectra. Our low-loss hybrid GO-AuNP films provide a solid-state material platform for erse nonlinear applications. The functionalizing method can serve as a universal strategy to manipulate the physical properties of hybrid GO.
On-chip energy storage integrated with solar cells using a laser scribed graphene oxide film
Publisher: AIP Publishing
Date: 20-07-2015
DOI: 10.1063/1.4927145
Height controllable two-dimensional photonic crystal structures fabricated with two-photon photopolymerisation
Publisher: IEEE
Date: 2003
Strong tangential force within a small trapping volume under near-field Laguerre-Gaussian beam illumination
Publisher: Optica Publishing Group
Date: 11-09-2008
DOI: 10.1364/OE.16.015191
Abstract: Near-field rotation of a trapped particle under focused evanescent Laguerre-Gaussian beam illumination is theoretically investigated by mapping the two-dimensional transverse trapping efficiency exerting on the particle. It is revealed that the severe focal field deformation associated with a focused evanescent Laguerre-Gaussian beam causes a significant impact on the transverse trapping performance of the microparticle. Compared with the far-field trapping force, strong tangential force components have been observed in the transverse efficiency mapping, which potentially lead to rotational motions to the particle within a small trapping volume in the optical near-field.
Photophysics of 2D Organic–Inorganic Hybrid Lead Halide Perovskites: Progress, Debates, and Challenges
Publisher: Wiley
Date: 29-01-2021
Abstract: 2D organic–inorganic hybrid Ruddlesden–Popper perovskites (RPPs) have recently attracted increasing attention due to their excellent environmental stability, high degree of electronic tunability, and natural multiquantum‐well structures. Although there is a rapid development of photoelectronic applications in solar cells, photodetectors, light emitting diodes (LEDs), and lasers based on 2D RPPs, the state‐of‐the‐art performance is far inferior to that of the existing devices because of the limited understanding on fundamental physics, especially special photophysics in carrier dynamics, excitonic fine structures, excitonic quasiparticles, and spin‐related effect. Thus, there is still plenty of room to improve the performances of photoelectronic devices based on 2D RPPs by enhancing knowledge on fundamental photophysics. This review highlights the special photophysics of 2D RPPs that is fundamentally different from the conventional 3D congeners. It also provides the most recent progress, debates, challenges, prospects, and in‐depth understanding of photophysics in 2D perovskites, which is significant for not only boosting performance of solar cells, LEDs, photodetectors, but also future development of applications in lasers, spintronics, quantum information, and integrated photonic chips.
Multicenter Clinical Investigation of a New Active Osseointegrated Steady-State Implant System.
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 17-08-2020
DOI: 10.1097/MAO.0000000000002794
Abstract: A new active transcutaneous bone conduction hearing implant system that uses piezoelectric technology has been developed: an active osseointegrated steady-state implant system (OSI). This was the first clinical investigation undertaken to demonstrate clinical performance, safety, and benefit of the new implant system. A multicenter prospective within-subject clinical investigation was conducted. Fifty-one adult subjects with mixed and conductive hearing loss (MHL/CHL, n = 37) and single-sided sensorineural deafness (SSD, n = 14) were included. Audiological evaluations included audiometric thresholds, speech recognition in noise, and quiet. Hearing and health-related patient-reported outcomes (PROs health utilities index [HUI], abbreviated profile of hearing aid benefit [APHAB], and speech, spatial of qualities of hearing scale [SSQ]), daily use, surgical and safety parameters were collected. Intra- and postoperative complications were few. One implant was removed before activation due to post-surgical infection. Compared with the preoperative softband tests, a significant improvement in speech recognition-in-noise was observed in the MHL/CHL group (–7.3 dB, p ≤ 0.0001) and the SSD group (–8.1 dB, p = 0.0008). In quiet, word recognition improved in the MHL/CHL group, most markedly at lower intensity input of 50 dB SPL (26.7%, p ≤ 0.0001). The results of all PROs showed a significant improvement with the new device compared with preoperative softband in the MHL/CHL group. In the SSD group significant improvements were observed in the APHAB and SSQ questionnaires. The results confirmed the clinical safety, performance, and benefit of this new treatment modality for subjects with CHL, MHL, and SSD.
Tuning the properties of flash-reduced graphene oxide electrodes for supercapacitor applications
Publisher: SPIE
Date: 31-12-2019
DOI: 10.1117/12.2543097
BiOBr nanoflakes with strong Kerr nonlinearity towards hybrid integrated photonic devices
Publisher: SPIE
Date: 18-02-2020
DOI: 10.1117/12.2546243
Evolution of interfacial coupling interaction of Ni-Ru species for pH-universal water splitting
Publisher: Elsevier BV
Date: 12-2021
Enhanced four-wave mixing in micro-ring resonators integrated with layered graphene oxide films
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEO_SI.2020.SM4L.5
Abstract: We experimentally demonstrate enhanced four-wave mixing in micro-ring resonators (MRRs) integrated with graphene oxide films. We achieve up to ~7.6-dB enhancement in conversion efficiency for a uniformly coated MRR and ~10.3-dB for a patterned device.
Small molecule π-conjugated electron acceptor for highly enhanced photocatalytic nitrogen reduction of BiOBr
Publisher: Elsevier BV
Date: 05-2022
Psychosocial and non-psychosocial risk factors for the new diagnosis of diabetes in elderly women
Publisher: Elsevier BV
Date: 10-2006
Surface-Enhanced Raman Scattering Performances of GO/AuNRs Composite Substrates Excited by Radially Polarized Light
Publisher: Shanghai Institute of Optics and Fine Mechanics
Date: 2019
A randomized controlled trial of online versus clinic-based CBT for adolescent anxiety
Publisher: American Psychological Association (APA)
Date: 10-2011
DOI: 10.1037/A0024512
Abstract: The study examined the relative efficacy of online (NET) versus clinic (CLIN) delivery of cognitive behavior therapy (CBT) in the treatment of anxiety disorders in adolescents. Participants included 115 clinically anxious adolescents aged 12 to 18 years and their parent(s). Adolescents were randomly assigned to NET, CLIN, or wait list control (WLC) conditions. The treatment groups received equivalent CBT content. Clinical diagnostic interviews and questionnaire assessments were completed 12 weeks after baseline and at 6- and 12-month follow-ups. Assessment at 12 weeks post-baseline showed significantly greater reductions in anxiety diagnoses and anxiety symptoms for both NET and CLIN conditions compared with the WLC. These improvements were maintained or further enhanced for both conditions, with minimal differences between them, at 6- and 12-month follow-ups. Seventy-eight percent of adolescents in the NET group (completer s le) no longer met criteria for the principal anxiety diagnosis at 12-month follow-up compared with 80.6% in the CLIN group. Ratings of treatment credibility from both parents and adolescents were high for NET and equivalent to CLIN. Satisfaction ratings by adolescents were equivalent for NET and CLIN conditions, whereas parents indicated slightly higher satisfaction ratings for the CLIN format. Online delivery of CBT, with minimal therapist support, is equally efficacious as clinic-based, face-to-face therapy in the treatment of anxiety disorders among adolescents. This approach offers a credible alternative to clinic-based therapy, with benefits of reduced therapist time and greater accessibility for families who have difficulty accessing clinic-based CBT.
Three-dimensional nanoscale far-field focusing of radially polarized light by scattering the SPPs with an annular groove
Publisher: Optica Publishing Group
Date: 23-06-2010
DOI: 10.1364/OE.18.014664
Influences of ethnicity and socioeconomic status on the body dissatisfaction and eating behaviour of Australian children and adolescents
Publisher: Elsevier BV
Date: 2005
DOI: 10.1016/J.EATBEH.2004.05.001
Abstract: The present study examined the association between socioeconomic status (SES), ethnicity, body dissatisfaction, and eating behaviours of 10- to 18-year-old children and adolescents. The study participants (N = 768) were categorised as Caucasian (74.7%), Chinese or Vietnamese (18.2%), and Italian or Greek (7.0%), and high (82%), middle (8.6%), and low SES (9.4%) according to parents' occupations. The chi(2), Mann-Whitney U test and Kruskal-Wallis test and logistic regression model were used to determine the interaction between variables. Females and older participants were more likely to desire a body figure that was thinner than their perceived current figure. Furthermore, the same groups were also more likely to be preoccupied with eating problems (females 7.1% vs. males 1.4% for participants aged 15-18 years, 7.8% vs. participants aged 10-14 years, 3.9%). The body dissatisfaction gender difference was females 42.8% vs. males 11.8%, and participants aged 15-18 years 41.7% vs. those aged 10-14 years, 28.3%. Participants whose parents were managers rofessionals were more likely to desire a body figure that was thinner than their perceived current figure than those from white-collar and blue-collar families. This was also the case for Caucasian Australians compared to those from Chinese or Vietnamese backgrounds. In conclusion, age and gender differences in body image and problems in eating behaviour were evident among children and adolescents. However, there was no significant SES and ethnic difference in the proportion of participants with eating problems and body dissatisfaction.
An Emerging Lead-Free Double-Perovskite Cs2AgFeCl6:In Single Crystal
Publisher: Wiley
Date: 06-09-2020
Energetic Aqueous Batteries
Publisher: Wiley
Date: 06-2022
Abstract: Rechargeable aqueous batteries are considered to be one of the most effective energy storage technologies to balance the cost‐efficiency, safety, and energy ower demands. The further progress of aqueous batteries with high energy density is needed to meet the ever‐increasing energy‐storage demands. This review highlights the strategies proposed so far to pursue the high energy density aqueous batteries, including the aspects of the electrolytes (from concentrated to dilute), the electrode chemistry (from inserted to converted), the cathode materials (from inorganic to organic), the anode materials (from compound to metallic), and the battery configurations (from integrated to decoupled). Critical appraisals of the emerging electrochemistry are presented for addressing the key issues in boosting the energy densities. Finally, the authors render insights into the future development of high‐energy aqueous batteries.
Designing broad phononic band gaps for in-plane modes
Publisher: Elsevier BV
Date: 03-2018
Reply to Németh and Garvie: Evidence for lonsdaleite in ureilite meteorites
Publisher: Proceedings of the National Academy of Sciences
Date: 08-05-2023
Computers in Cognitive‐Behaviour Therapy
Publisher: Informa UK Limited
Date: 11-1993
Functional three-dimensional nonlinear nanostructures in a gold ion nanocomposite
Publisher: IEEE
Date: 08-2011
Stable continuous-wave mode-locked laser from a 1645 nm Er:YAG ceramic oscillator
Publisher: IOP Publishing
Date: 17-01-2022
DOI: 10.35848/1882-0786/AC481C
Abstract: We demonstrate stable continuous-wave mode-locking (CWML) pulses around 1645 nm by employing a homemade Er:YAG ceramic. By using a fiber laser and semiconductor saturable absorber mirror (SESAM) with a modulation depth of 1.2%, we get ML pulses with an output average power up to 815 mW, a pulse width shortened as ∼4 ps, and a peak power of ∼1.8 kW. With the SESAM of the modulation depth of 2.4%, second-order harmonic ML pulses were also obtained. As far as we know, this is the first report of CWML from Er 3+ -doped ceramics and also the shortest pulse duration in Er 3+ -doped solid-state oscillators.
Characterization of the sub-continental lithospheric mantle beneath the Cameroon volcanic line inferred from alkaline basalt hosted peridotite xenoliths from Barombi Mbo and Nyos Lakes
Publisher: Elsevier BV
Date: 11-2015
Computational Investigation of MgH2/NbOx for Hydrogen Storage
Publisher: American Chemical Society (ACS)
Date: 16-04-2021
Enhanced Kerr Nonlinearity and Nonlinear Figure of Merit in Silicon Nanowires Integrated with 2D Graphene Oxide Films
Publisher: American Chemical Society (ACS)
Date: 29-06-2020
Brief Report: Children's Responses to Trauma- and Nontrauma-related Hospital Admission: A Comparison Study
Publisher: Oxford University Press (OUP)
Date: 18-10-2007
Abstract: This study aims to investigate and compare psychological responses in children and parents 1 month after trauma- and nontrauma-related hospital admission. Two hundred and five children aged 7-16 years (and their parents) were assessed for posttraumatic stress disorder (PTSD), other psychopathology, and distress 1 month after trauma-related (Trauma Group n = 101) and nontrauma-related hospital admission (Non-Trauma Group n = 104). Clinically elevated PTSD symptom levels were more prevalent in children admitted for trauma-related (18%) than nontrauma-related reasons (4%). Parents also experienced posttraumatic distress, although rates of clinically elevated symptom levels did not differ between the Trauma (11%) and Non-Trauma (8%) groups. Other pathology and distress in children and parents were comparable across groups. Children experienced greater posttraumatic distress following trauma-related hospital admission, while parents' experience of their child's hospitalization is equally distressing regardless of the reason for admission.
Virtual reality exposure was as effective as standard exposure for reducing fear of flying
Publisher: BMJ
Date: 05-2001
DOI: 10.1136/EBMH.4.2.52
Revealing Dynamic Effects of Mobile Ions in Halide Perovskite Solar Cells Using Time‐Resolved Microspectroscopy
Publisher: Wiley
Date: 11-10-2020
One-step synthesis of nail-like Mn-doped CdS/CdBr2 hetero-nanostructures for potential lasing application
Publisher: IOP Publishing
Date: 21-12-2018
Abstract: Nanoscale heterostructures, which incorporate two or more materials such as core-shell nanocrystals, core-crown nanoplates, or seeded nanorods, allow better control of the optical, electrical and magnetic properties that are inaccessible in single component nanostructure, yet their variety and controlled growth are still challenging. Here, a nail-like Mn-doped CdS/CdBr
Layer structured materials for ambient nitrogen fixation
Publisher: Elsevier BV
Date: 06-2022
Online CBT in the treatment of child and adolescent anxiety disorders: Issues in the development of BRAVE-ONLINE and two case illustrations
Publisher: Cambridge University Press (CUP)
Date: 07-2008
DOI: 10.1017/S135246580800444X
Abstract: This paper describes the rationale for and development of an online cognitive-behavioural treatment for child and adolescent anxiety (BRAVE–ONLINE). It highlights the challenges involved in adapting a clinic-based intervention for delivery using the internet, with separate sessions for parents and their children (or adolescents). We outline strategies to ensure that young people remain engaged in online therapy, and describe techniques designed to optimize the alliance between clients and the online therapist. Two case studies are presented that illustrate the practical and technical aspects of implementing the intervention, and demonstrate the feasibility of achieving successful outcomes using online delivery of CBT for child and adolescent anxiety. However, firm conclusions regarding the efficacy of this approach cannot be drawn until the results of randomized controlled trials are available. The paper identifies directions for future research.
Enhanced FWM in SiN nanowires integrated with 2D graphene oxide films
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.P4_15
Abstract: Enhanced four-wave mixing in silicon nitride waveguides integrated with 2D graphene oxide (GO) films is experimentally demonstrated. We achieve a high conversion efficiency improvement of ~7.3 dB for a 2-cm-long waveguide with monolayer GO film.
Flat Lenses Based on 2D Perovskite Nanosheets
Publisher: Wiley
Date: 11-2020
A Biomimetic Supramolecular Approach for Charge Transfer between Donor and Acceptor Chromophores with Aggregation‐Induced Emission
Publisher: Wiley
Date: 16-09-2018
Abstract: Supramolecular assembly of chromophores with inherent resistance to aggregation-induced self-quenching is significant to applications such as chemical sensing and organic light emitting diodes (OLEDs). In this work, molecular gels with aggregation-induced emission (AIE) are constructed by simply coassembling AIE chromophores (electron donor or acceptor) with a nonfluorescent molecular gelator. The binary gels are fluorescent even at very low concentrations of the AIE chromophores, indicating that the rotation of their aromatic cores is restricted in the gel network. In tertiary gels, the fluorescence of the donor chromophore can be efficiently reduced by the acceptor chromophore through a combination of static and dynamic quenching process, via charge transfer from the donor to the acceptor. This work demonstrates a convenient approach to fabricate a supramolecular charge transfer system using an AIE donor and acceptor.
Integrated waveguide and micro-ring resonator polarizers with 2D layered graphene oxide films
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.P4_14
Abstract: We experimentally demonstrate integrated waveguide and micro-ring resonator polarizers incorporating two-dimensional layered graphene oxide films, with a high polarization dependent loss of 53.8 dB and a high polarization extinction ratio of 8.3 dB, respectively.
Enhanced four-wave mixing in micro-ring resonators with integrated 2D layered graphene oxide films
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.C11E_4
Abstract: Two-dimensional layered graphene oxide films are integrated with micro-ring resonators to experimentally demonstrate enhanced four-wave mixing, achieving up to ~7.6-dB enhancement in conversion efficiency for a uniformly coated device and ~10.3-dB for a patterned device.
Visualizing the Impact of Light Soaking on Morphological Domains in an Operational Cesium Lead Halide Perovskite Solar Cell
Publisher: American Chemical Society (ACS)
Date: 12-12-2019
DOI: 10.1021/ACS.JPCLETT.9B03210
Abstract: The dynamics of photogenerated carriers and mobile ions in operational cesium lead halide (CsPbI
Design of lumpy metallic nanoparticles for broadband and wide-angle light scattering
Publisher: AIP Publishing
Date: 10-2012
DOI: 10.1063/1.4757135
Abstract: Broadband and wide-angle light scattering media are highly desirable in photonic applications. In this paper, we theoretically investigate the light scattering properties of lumpy nanoparticles of silver, aluminum, and copper compared to those of smooth nanospheres with the same volume. The lumpy nanoparticles are found to provide broadband scattering enhancement over the smooth nanoparticles in a variety of dielectric environments. A maximum 18% enhancement in angular scattering for Al lumpy particles was found. More importantly, near-field scattering intensity mapping confirms that the enhanced scattering is achieved in all directions, making them more attractive in erse photonic applications.
Biomimetic and plasmonic hybrid light trapping for highly efficient ultrathin crystalline silicon solar cells
Publisher: The Optical Society
Date: 16-02-2016
DOI: 10.1364/OE.24.00A506
External stokes shift of perovskite nanocrystals enlarged by photon recycling
Publisher: AIP Publishing
Date: 07-01-2019
DOI: 10.1063/1.5081805
Abstract: Lead halide perovskite nanocrystals (NCs) have rapidly emerged as promising materials for low-cost and high-efficiency photovoltaic, optoelectronic, and photonic devices. The Stokes shift is a crucial parameter affecting their performance. In this work, we find that the external Stokes shift is strongly dependent on photon recycling. Due to the nonlinear nature of the quantum confinement effect (QCE), the bandgap distribution becomes extremely broad when the sizes are ultra-small, resulting in many repetitions of photon recycling and substantial emission redshift. Thereby, the smaller NCs exhibit larger external Stokes shifts. In detail, for the small NCs with the most probable size of 6.4 nm, the intrinsic Stokes shift is about 71 meV, but the observed external Stokes shift becomes 143.4 meV in the concentrated solution, whereas the intrinsic and apparent Stokes shifts are 69 and 97.6 meV for large NCs of 9.7 nm. Therefore, photon recycling significantly contributes to the external Stokes shift of perovskite NCs, in particular for the ultra-small sizes with strong QCE. This finding will add to the growing fundamental physical understanding of perovskites, which is of great interest due to their applications in photovoltaics and other fields.
Use of radially polarized beams in three-dimensional photonic crystal fabrication with the two-photon polymerization method
Publisher: Optica Publishing Group
Date: 18-06-2009
DOI: 10.1364/OL.34.001918
Abstract: Radially polarized ultrafast laser beams are used in the fabrication of three-dimensional photonic crystals with the two-photon polymerization technique in organic-inorganic hybrid materials. It has been found that when a radially polarized beam is employed, the lateral size of the fabricated polymer rods is decreased by 27.5% from 138 to 100 nm under a threshold fabrication condition, leading to a 17.35% reduction in the filling ratio of the photonic crystal. A comparison of the stop gaps between radially polarized and linearly polarized beam illumination shows a higher suppression ratio in transmission and a wider wavelength range in the former case owing to the favorable tuning of the filling ratio of the three-dimensional photonic crystals.
Prognostic indices with brief and standard CBT for panic disorder: I. Predictors of outcome
Publisher: Cambridge University Press (CUP)
Date: 10-05-2007
DOI: 10.1017/S0033291707000670
Abstract: Although the effectiveness of cognitive behavioural therapy (CBT) in the management of panic disorder (PD) is now well established, there have been few studies of predictors of outcome with this patient group using clinical effectiveness trial data, a hypothesis-testing model, and a dependent measure of clinically significant change. The data for this study came from a randomized controlled trial of three forms of CBT delivery for PD with and without agoraphobia (two 6-week CBT programmes, one of which was computer assisted, and one therapist-directed 12-week CBT programme), comprising a total of 186 patients across two sites. Based on previous related research, five hypothesized predictors of post-treatment and follow-up outcome were identified and examined, using a series of bivariate and multivariate analyses. The results in general supported the hypotheses. Strength of blood/injury fears, age of initial onset of panic symptoms, co-morbid social anxieties and degree of agoraphobic avoidance were predictive of both measures of post-treatment outcome. Degree of residual social difficulties and the continued use of anxiolytics at post-treatment were also shown to predict poor outcome at the 6-month follow-up. However, strength of continuing dysfunctional agoraphobic cognitions by the end of active treatment did not predict outcome at follow-up for the s le as a whole. The identification of consistent predictors of outcome with CBT has many clinical and research benefits. As CBT, however, is being delivered increasingly in a variety of brief formats, further research is required to identify moderators of response to these ‘non-standard’ treatment formats.
Enhanced self-phase modulation in silicon-on-insulator nanowires integrated with 2D layered graphene oxide films
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.C11E_1
Abstract: Two-dimensional layered graphene oxide (GO) films are integrated with silicon-on-insulator nanowires to experimentally demonstrate enhanced self-phase modulation, achieving high broadening factor of up to 4.14 for a device patterned with 0.4-mm-long, 10 layers of GO.
Graphene oxide for enhanced self-phase modulation in silicon nitride waveguides
Publisher: SPIE
Date: 17-03-2023
DOI: 10.1117/12.2648005
A Comparison of Delivery Methods of Cognitive-Behavioral Therapy for Panic Disorder: An International Multicenter Trial
Publisher: American Psychological Association (APA)
Date: 2003
Two-photon reduction: a cost-effective method for fabrication of functional metallic nanostructures
Publisher: Springer Science and Business Media LLC
Date: 13-01-2017
High-performance multi-morphology porous wick fabricated using a composite pore former
Publisher: Elsevier BV
Date: 11-2023
Design and Optimization of Four-Wave Mixing in Microring Resonators Integrated With 2D Graphene Oxide Films
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2021
Efficient Energy Funnelling by Engineering the Bandgap of a Perovskite: Förster Resonance Energy Transfer or Charge Transfer?
Publisher: American Chemical Society (ACS)
Date: 30-06-2020
Lead-free metal-halide double perovskites: from optoelectronic properties to applications
Publisher: Walter de Gruyter GmbH
Date: 06-2020
Abstract: Lead (Pb) halide perovskites have witnessed highly promising achievements for high-efficiency solar cells, light-emitting diodes (LEDs), and photo/radiation detectors due to their exceptional optoelectronic properties. However, compound stability and Pb toxicity are still two main obstacles towards the commercialization of halide perovskite-based devices. Therefore, it is of substantial interest to search for non-toxic candidates with comparable photophysical characteristics. Metal-halide double perovskites (MHDPs), A 2 BBʹX 6 , are recently booming as promising alternatives for Pb-based halide-perovskites for their non-toxicity and significantly enhanced chemical and thermodynamic stability. Moreover, this family exhibits rich combinatorial chemistry with tuneable optoelectronic properties and thus a great potential for a broad range of optoelectronic/electronic applications. Herein, we present a comprehensive review of the MHDPs synthesized so far, and classified by their optical and electronic properties. We systematically generalize their electronic structure by both theoretical and experimental efforts to prospect the relevant optoelectronic properties required by different applications. The progress of the materials in various applications is explicated in view of the material structure-function relationship. Finally, a perspective outlook to improve the physical and optoelectronic properties of the materials is proposed aiming at fostering their future development and applications.
Simultaneous broadband light trapping and fill factor enhancement in crystalline silicon solar cells induced by Ag nanoparticles and nanoshells
Publisher: The Optical Society
Date: 16-08-2012
DOI: 10.1364/OE.20.00A694
Near-field light concentration of ultra-small metallic nanoparticles for absorption enhancement in a-Si solar cells
Publisher: AIP Publishing
Date: 11-03-2009
DOI: 10.1063/1.4794420
Abstract: Near-field light concentration from plasmonic nanostructures was predicted to significantly improve solar cell conversion efficiency since the inception of plasmonic solar cells. However the challenge remains in designing effective nanostructures for useful near-field enhancement much exceeding the detrimental ohmic loss and light blockage losses in solar cells. We propose and demonstrate ultra-small (a few nanometers) gold nanoparticles integrated in amorphous silicon solar cells between the front electrode and the photoactive layer. Significant enhancements in both the photocurrent (14.1%) and fill factor (12.3%) have been achieved due to the strong plasmonic near-field concentration and the reduced contact resistance, respectively.
Carbon-based absorbers for solar evaporation: Steam generation and beyond
Publisher: Elsevier BV
Date: 09-2020
Graphenized Carbon Nanofiber: A Novel Light‐Trapping and Conductive Material to Achieve an Efficiency Breakthrough in Silicon Solar Cells
Publisher: Wiley
Date: 31-10-2014
Abstract: An innovative 1D material--graphenized carbon nanofiber--is designed and synthesized. The nanofiber exhibits superior light-scattering properties, ultralow absorption loss, and high electrical conductivity, and enables a wide range of applications. Simply integrating the nanofibers with the state-of-the-art silicon solar cells leads to a leaping efficiency boost of 3.8%, almost five times higher than the current world record.
Water concentrations and hydrogen isotope compositions of alkaline basalt-hosted clinopyroxene megacrysts and amphibole clinopyroxenites: the role of structural hydroxyl groups and molecular water
Publisher: Springer Science and Business Media LLC
Date: 15-04-2016
Long-Distance Ionic Diffusion in Cesium Lead Mixed Halide Perovskite Induced by Focused Illumination
Publisher: American Chemical Society (ACS)
Date: 15-10-2019
Constraints on the thickness and seismic properties of the lithosphere in an extensional setting (Nógrád-Gömör Volcanic Field, Northern Pannonian Basin)
Publisher: Springer Science and Business Media LLC
Date: 23-01-2015
Laser fabricated ultrathin flat lens in sub-nanometer thick monolayer transition metal dichalcogenides crystal
Publisher: OSA
Date: 2016
Surface and interface chemistry in metal‐free electrocatalysts for electrochemical CO2 reduction
Publisher: Wiley
Date: 02-02-2022
DOI: 10.1002/SMM2.1090
Abstract: The electrochemical reduction of carbon dioxide (CO 2 ) into value‐added fuels and chemicals presents a sustainable route to alleviate CO 2 emissions, promote carbon‐neutral cycles and reduce the dependence on fossil fuels. Considering the thermodynamic stability of the CO 2 molecule and sluggish reaction kinetics, it is still a challenge to design highly efficient electrocatalysts for the CO 2 reduction reaction (CO 2 RR). It has been found that the surface and interface chemistry of electrocatalysts can modulate the electronic structure and increase the active sites, which is favorable for CO 2 adsorption, electron transfer, mass transport, and optimizing adsorption strength of reaction intermediates. However, the effect of surface and interface chemistry on metal‐free electrocatalysts (MFEs) for CO 2 RR has not been comprehensively reviewed. Herein, we discuss the importance of the surface and interface chemistry on MFEs for improving the electrochemical CO 2 RR performance based on thermodynamic and kinetic views. The fundamentals and challenges of CO 2 RR are firstly presented. Then, the recent advances of the surface and interface chemistry in improving reaction rate and overcoming reaction constraints are reviewed from regulating electronic structure, active sites, electron transfer, mass transport, and intermediate binding energy. Finally, the research challenges and prospects are proposed to suggest the future designs of advanced MFEs in CO 2 RR.
A frozen matrix hybrid optical nonlinear system enhanced by a particle lens
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5NR03304G
Abstract: In this work, a Graphene Oxide (GO) nano-sheet and SiO 2 micro-bead hybrid system based on a frozen matrix was investigated for its enhanced optical nonlinear performance.
Nanophotonics silicon solar cells
Publisher: CRC Press
Date: 28-07-2017
Ultrafast Carrier Dynamics in 2D NbTe2 Films: Implications for Photonic and Optoelectronic Devices
Publisher: American Chemical Society (ACS)
Date: 09-12-2022
Tuberculosis detection from raw sputum samples using Au-electroplated screen-printed electrodes as E-DNA sensor
Publisher: Frontiers Media SA
Date: 21-11-2022
DOI: 10.3389/FCHEM.2022.1046930
Abstract: Tuberculosis (TB) remains a leading cause of death globally, especially in underdeveloped nations. The main impediment to TB eradication is a lack of efficient diagnostic tools for disease diagnosis. In this work, label free and ultrasensitive electrochemical DNA biosensor for detecting Mycobacterium tuberculosis has been developed based on the electrodeposition of gold nanoparticles on the surface of carbon screen-printed carbon electrode (Zensors) for signal lification. Particularly, screen-printed electrodes were modified by electrochemical deposition of Au to enhance the conductivity and facilitate the immobilization of ssDNA probes via Au-S bonds. The electrochemically modified SPEs were characterized using Scanning electron microscopy/Energy Dispersive X-Ray Analysis (SEM/EDX) and X-Ray Diffraction (XRD). Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques were used to investigate the DNA hybridization between single-stranded (ssDNA) probe and target DNA (tDNA). Under the ideal conditions, DPV exhibited a correlation coefficient R2 = 0.97, when analyzed with different tDNA concentrations. The proposed DNA biosensor exhibits a good detection range from 2 to 10 nm with a low detection limit of 1.91 nm, as well as high selectivity that, under ideal conditions, distinguishes non-complementary DNA from perfectly matched tDNA. By eliminating the need for DNA purification, this work paves the path for creating disposable biosensors capable of detecting DNA from raw sputum s les.
Generation of an axially super-resolved quasi-spherical focal spot using an amplitude-modulated radially polarized beam
Publisher: The Optical Society
Date: 22-06-2011
DOI: 10.1364/OL.36.002471
Enhanced Self-Phase Modulation in Silicon Nitride Waveguides Integrated With 2D Graphene Oxide Films
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Disordered eating, weight dissatisfaction and dieting in relation to unwanted childhood sexual experiences in a community sample
Publisher: Elsevier BV
Date: 03-1998
DOI: 10.1016/S0022-3999(97)00258-4
Abstract: A study was conducted to examine the relationships among eating pathology, weight dissatisfaction and dieting, and unwanted sexual experiences in childhood. An unselected community s le of 201 young and 268 middle-aged women were administered questionnaires assessing eating behaviors and attitudes, and past and current sexual abuse. Results showed differential relationships among these factors for the two age cohorts: for young women, past sexual abuse predicted weight dissatisfaction, but not dieting or disordered eating behaviors, whereas for middle-aged women, past abuse was predictive of disordered eating, but not dieting or weight dissatisfaction. Current physical or sexual abuse was also found to be predictive of disordered eating for the young women. These findings underscore the complexity of the relationships among unwanted sexual experiences and eating and weight pathology, and suggest that the timing of sexual abuse, and the age of the woman, are important mediating factors.
Performance anxiety, social phobia, and setting effects in instrumental music students
Publisher: Elsevier BV
Date: 1993
Single-shot production of Janus graphene thin film for solar steam generation with 94.5% efficiency
Publisher: Elsevier BV
Date: 10-2022
New insight into carrier transport in 2D layered perovskites
Publisher: Elsevier BV
Date: 04-2022
Characterization of Acute Whiplash-Associated Disorders
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 2004
Amplification and spontaneous emission of Er-doped fiber both in theory and experiment
Publisher: SPIE
Date: 29-10-2001
DOI: 10.1117/12.446531
Two-dimensional material functional devices enabled by direct laser fabrication
Publisher: Springer Science and Business Media LLC
Date: 12-12-2017
Direction-dependent spontaneous emission from near-infrared quantum dots at the angular band edges of a three-dimensional photonic crystal
Publisher: AIP Publishing
Date: 17-12-2007
DOI: 10.1063/1.2824388
Abstract: Engineering spontaneous emission from light emitters embedded within three-dimensional photonic crystals is of great significance in both fundamental research of quantum optics and applications of microphotonic devices. In this letter, we report on the effective modification of spontaneous emission from near-infrared PbSe quantum dots infiltrated in a three-dimensional woodpile polymeric photonic crystal through adjusting its angle-dependent stop gaps. A significant inhibition effect as well as a pronounced enhancement of the spontaneous emission are observed in the midgap and at the center of the band edge, respectively. The observed phenomenon can be understood from the stretched exponential model on decay dynamics.
Prognostic indices with brief and standard CBT for panic disorder: II. Moderators of outcome
Publisher: Cambridge University Press (CUP)
Date: 10-05-2007
DOI: 10.1017/S0033291707000682
Abstract: Despite the growth of reduced therapist-contact cognitive behavioural therapy (CBT) programmes, there have been few systematic attempts to determine prescriptive indicators for such programmes vis-à-vis more standard forms of CBT delivery. The present study aimed to address this in relation to brief (6-week) and standard (12-week) therapist-directed CBT for panic disorder (PD) with and without agoraphobia. Higher baseline levels of severity and associated disability/co-morbidity were hypothesized to moderate treatment effects, in favour of the 12-week programme. Analyses were based on outcome data from two out of three treatment groups ( n =72) from a recent trial of three forms of CBT delivery for PD. The dependent variables were a continuous composite panic/anxiety score and a measure of clinical significance. Treatment×predictor interactions were examined using multiple and logistic regression analyses. As hypothesized, higher baseline severity, disability or co-morbidity as indexed by strength of dysfunctional agoraphobic cognitions duration of current episode of PD self-ratings of panic severity and the 36-item Short Form Health Survey (SF-36) (Mental component) score were all found to predict poorer outcome with brief CBT. A similar trend was apparent in relation to baseline level of depression. With high and low end-state functioning as the outcome measure, however, only the treatment×agoraphobic cognitions interaction was found to be significant. While there was no evidence that the above variables necessarily contraindicate the use of brief CBT, they were nevertheless associated with greater overall levels of post-treatment improvement with the 12-week approach.
Epidemiology of Traumatic Epidural Hematoma in Young Age
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 10-2011
Recent Progress of Vacancy Engineering for Electrochemical Energy Conversion Related Applications
Publisher: Wiley
Date: 06-12-2020
Activity and affect: Repeated within-participant assessment in people after joint replacement surgery.
Publisher: American Psychological Association (APA)
Date: 02-2009
DOI: 10.1037/A0014864
Abstract: Between-participant research has shown that high negative affectivity predicts greater activity limitations and vice versa. This study examined both between- and within-participant associations of negative and positive affectivity with activity levels using ecological momentary assessment. Participants were 25 people who had undergone joint replacement surgery 12 months previously. Participants made multiple reports of their activity and positive and negative affectivity over a single day using a computerized diary. Activity was also objectively recorded using an activity monitor. The following day, participants made a self-report of their activity over the measurement day and general positive and negative affectivity levels were recorded. Higher self-reported walking time over the whole measurement day was associated with higher general positive affectivity but not negative affectivity. However, using ecological momentary assessment, higher diary reports of negative affectivity predicted increased activity levels while positive affectivity neither predicted nor was predicted by activity. These findings demonstrate the importance of within-participant methodology in detecting subtle and immediate effects of in iduals' mood on behavior that may differ from findings investigating between-participant effects over longer time periods.
Fabrication Technologies for the On‐Chip Integration of 2D Materials
Publisher: Wiley
Date: 07-01-2022
Abstract: With compact footprint, low energy consumption, high scalability, and mass producibility, chip‐scale integrated devices are an indispensable part of modern technological change and development. Recent advances in 2D layered materials with their unique structures and distinctive properties have motivated their on‐chip integration, yielding a variety of functional devices with superior performance and new features. To realize integrated devices incorporating 2D materials, it requires a erse range of device fabrication techniques, which are of fundamental importance to achieve good performance and high reproducibility. This paper reviews the state‐of‐art fabrication techniques for the on‐chip integration of 2D materials. First, an overview of the material properties and on‐chip applications of 2D materials is provided. Second, different approaches used for integrating 2D materials on chips are comprehensively reviewed, which are categorized into material synthesis, on‐chip transfer, film patterning, and property tuning/modification. Third, the methods for integrating 2D van der Waals heterostructures are also discussed and summarized. Finally, the current challenges and future perspectives are highlighted.
Flash‐Induced Ultrafast Production of Graphene/MnO with Extraordinary Supercapacitance
Publisher: Wiley
Date: 18-06-2021
Abstract: Production of high‐capacitance electrodes beyond the theoretical limit of 550 F g −1 of pure graphene materials is highly desired for energy storage applications, yet remains an open challenge, especially with a facile and simple process. By rational design of reaction condition guided by theoretical analysis, the ultrafast (within millisecond) fabrication of high‐performance graphene/MnO electrodes via a low‐cost and one‐step flash reduction process is proposed and demonstrated. This simple method enables high‐quality porous graphene networks and the effective synthesis of embedding pseudocapacitive‐active MnO nanomaterials simultaneously. Due to the high‐density and homogeneous distribution of MnO nano‐needles on 3D graphene networks, an ultrahigh capacitance (up to 1706 F g −1 based on electrode mass and 2150 F g −1 based on MnO mass only) is demonstrated. Functional supercapacitor prototype further illustrates the broad potential applications enabled by the fabricated electrodes in energy storage, sensing, and catalysts.
Design of P-Doped Mesoporous Carbon Nitrides as High-Performance Anode Materials for Li-Ion Battery
Publisher: American Chemical Society (ACS)
Date: 28-04-2020
PHOBIC ANXIETY IN PANIC DISORDER - COGNITION, HEART-RATE, AND SUBJECTIVE ANXIETY
Publisher: Elsevier BV
Date: 10-1993
Low cost and high performance Al nanoparticles for broadband light trapping in Si wafer solar cells
Publisher: AIP Publishing
Date: 09-04-2012
DOI: 10.1063/1.3703121
Abstract: In this paper low cost and earth abundant Al nanoparticles are simulated and compared with noble metal nanoparticles Ag and Au for plasmonic light trapping in Si wafer solar cells. It has been found tailored Al nanoparticles enable broadband light trapping leading to a 28.7% photon absorption enhancement in Si wafers, which is much larger than that induced by Ag or Au. Once combined with the SiNx anti-reflection coating, Al nanoparticles can produce a 42.5% enhancement, which is 4.3% higher than the standard SiNx due to the increased absorption in both the blue and near-infrared regions.
Smart Solar-Metal-Air Batteries Based on BiOCl Photocorrosion for Monolithic Solar Energy Conversion and Storage
Publisher: Wiley
Date: 07-12-2022
Abstract: Herein, a BiOCl hydrogel film electrode featuring excellent photocorrosion and regeneration properties acts as the anode to construct a novel type of smart solar–metal–air batteries (SMABs), which combines the characteristics of solar cells (direct photovoltaic conversion) and metal–air batteries (electric energy storage and release interacting with atmosphere). The cyclic photocorrosion processes between BiOCl (Bi 3+ ) and Bi can simply be achieved by solar light illumination and standing in the dark. Upon illumination, the device takes open‐circuit configuration to charge itself from the sunlight. Notably, in this system, the converted solar energy can be stored in the SMABs without the need of external assistance. In the discharging process in the dark, Bi 0 spontaneously turns back to Bi 3+ producing electrons to induce the oxygen reduction reaction. With an illumination of 15 min, the battery with an electrode area of 1 cm 2 can be continuously discharged for ≈3000 s. Taking elemental Bi as the calculation object, the theoretical capacity of the SMABs is 384.75 mAh g ‐1 , showing its potential application in energy storage. This novel type of SMABs is developed based on the unique photocorrosive and self‐oxidation reaction of BiOCl to achieve photochemical energy generation and storage.
Hetero-structured lumpy nanoparticle conformal structure for high absorbance of ultrathin film amorphous silicon solar cells
Publisher: AIP Publishing
Date: 16-12-2013
DOI: 10.1063/1.4851238
Abstract: We present a concept for enhancing the absorbance of amorphous-silicon solar cells by using hetero-structured nanoparticles consisting of dielectric core particles combined with small metallic surface nanoparticles half embedded in the core to harness both the scattering effect and the near field light concentration. Through optimising key parameters, including the relative distance of the nanoparticles to the solar cell, the radius ratio of the core to the surface nanoparticles, and the refractive index of the core particles, the short circuit current density in a 20 nm nanoparticle-integrated active layer is equivalent to that in a 300 nm flat active layer.
Broadband Enhancement in Thin-Film Amorphous Silicon Solar Cells Enabled by Nucleated Silver Nanoparticles
Publisher: American Chemical Society (ACS)
Date: 08-02-2012
DOI: 10.1021/NL203463Z
Abstract: Recently plasmonic effects have gained tremendous interest in solar cell research because they are deemed to be able to dramatically boost the efficiency of thin-film solar cells. However, despite of the intensive efforts, the desired broadband enhancement, which is critical for real device performance improvement, has yet been achieved with simple fabrication and integration methods appreciated by the solar industry. We propose in this paper a novel idea of using nucleated silver nanoparticles to effectively scatter light in a broadband wavelength range to realize pronounced absorption enhancement in the silicon absorbing layer. Since it does not require critical patterning, experimentally these tailored nanoparticles were achieved by the simple, low-cost and upscalable wet chemical synthesis method and integrated before the back contact layer of the amorphous silicon thin-film solar cells. The solar cells incorporated with 200 nm nucleated silver nanoparticles at 10% coverage density clearly demonstrate a broadband absorption enhancement and significant superior performance including a 14.3% enhancement in the short-circuit photocurrent density and a 23% enhancement in the energy conversion efficiency, compared with the randomly textured reference cells without nanoparticles. Among the measured plasmonic solar cells the highest efficiency achieved was 8.1%. The significant enhancement is mainly attributed to the broadband light scattering arising from the integration of the tailored nucleated silver nanoparticles.
Cognitive behaviour therapy for panic disorder: Long-term follow up
Publisher: Informa UK Limited
Date: 06-2005
DOI: 10.1080/16506070410005410
Abstract: This paper describes a long-term follow-up of patients with panic disorder who received cognitive behaviour therapy within a randomized controlled trial. Of 89 patients eligible for follow-up, 28 (31.5%) were reassessed 6-8 years after commencement of treatment in the trial. No differences were found between those who were followed up and those lost to follow-up on most baseline measures including measures of panic-related psychopathology, or depression. Outcomes at long-term follow-up were significantly better than baseline measures of panic, avoidance and depression. In this sub-s le the effect of cognitive behaviour therapy for panic disorder appears to maintain over the long-term.
The use of hand-held computers as an adjunct to cognitive-behavior therapy
Publisher: Elsevier BV
Date: 03-1996
Free-standing graphene oxide mid-infrared polarizers
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0NR01619E
Abstract: Mid-infrared free-standing graphene oxide polarizers with working wavelengths from 2 μm to 14 μm, and an extinction ratio of 20 dB.
A Varifocal Graphene Metalens for Broadband Zoom Imaging Covering the Entire Visible Region
Publisher: American Chemical Society (ACS)
Date: 16-02-2021
Layer number dependent exciton dissociation and carrier recombination in 2D Ruddlesden–Popper halide perovskites
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TC01656C
Abstract: Different dynamics of excitons and free carriers in 2D Ruddlesden–Popper halide perovskites with layer numbers of n = 1 and n ≥ 2.
Enhanced photothermal therapy assisted with gold nanorods using a radially polarized beam
Publisher: AIP Publishing
Date: 08-02-2010
DOI: 10.1063/1.3302461
Abstract: We report on the use of a radially polarized beam for photothermal therapy of cancer cells labeled with gold nanorods. Due to a three-dimensionally distributed electromagnetic field in the focal volume, the radially polarized beam is proven to be a highly efficient laser mode to excite gold nanorods randomly oriented in cancer cells. As a result, the energy fluence for effective cancer cell damage is reduced to one fifth of that required for a linearly polarized beam, which is only 9.3% of the medical safety level.
Masculinity–femininity as a national characteristic and its relationship with national agoraphobic fear levels: Fodor’s sex role hypothesis revitalized
Publisher: Elsevier BV
Date: 07-2003
DOI: 10.1016/S0005-7967(02)00188-2
Abstract: Hofstede's dimension of national culture termed Masculinity-Femininity [. Cultures and organizations: software of the mind. London: McGraw-Hill] is proposed to be of relevance for understanding national-level differences in self-assessed agoraphobic fears. This prediction is based on the classical work of Fodor [. In: V. Franks & V. Burtle (Eds.), Women in therapy: new psychotherapies for a changing society. New York: Brunner/Mazel]. A unique data set comprising 11 countries (total N=5491 students) provided the opportunity of scrutinizing this issue. It was hypothesized and found that national Masculinity (the degree to which cultures delineate sex roles, with masculine or tough societies making clearer differentiations between the sexes than feminine or modest societies do) would correlate positively with national agoraphobic fear levels (as assessed with the Fear Survey Schedule-III). Following the correction for sex and age differences across national s les, a significant and large effect-sized national-level (ecological) r=+0.67 (P=0.01) was found. A highly feminine society such as Sweden had the lowest, whereas the ch ion among the masculine societies, Japan, had the highest national Agoraphobic fear score.
Sequential Lonsdaleite to Diamond Formation in Ureilite Meteorites via In Situ Chemical Fluid/Vapor Deposition
Publisher: Proceedings of the National Academy of Sciences
Date: 12-09-2022
Abstract: Ureilite meteorites are arguably our only large suite of s les from the mantle of a dwarf planet and typically contain greater abundances of diamond than any known rock. Some also contain lonsdaleite, which may be harder than diamond. Here, we use electron microscopy to map the relative distribution of coexisting lonsdaleite, diamond, and graphite in ureilites. These maps show that lonsdaleite tends to occur as polycrystalline grains, sometimes with distinctive fold morphologies, partially replaced by diamond + graphite in rims and cross-cutting veins. These observations provide strong evidence for how the carbon phases formed in ureilites, which, despite much conjecture and seemingly conflicting observations, has not been resolved. We suggest that lonsdaleite formed by pseudomorphic replacement of primary graphite shapes, facilitated by a supercritical C-H-O-S fluid during rapid decompression and cooling. Diamond + graphite formed after lonsdaleite via ongoing reaction with C-H-O-S gas. This graphite lonsdaleite diamond + graphite formation process is akin to industrial chemical vapor deposition but operates at higher pressure (∼1–100 bar) and provides a pathway toward manufacture of shaped lonsdaleite for industrial application. It also provides a unique model for ureilites that can reconcile all conflicting observations relating to diamond formation.
Changes in the oral cavity might reflect psychological disorders in some patients
Publisher: Wiley
Date: 17-02-2011
DOI: 10.1111/J.2041-1626.2011.00047.X
Abstract: The treatment of oral dysesthesias, such as burning mouth syndrome, can be challenging. Patient acceptance of the role of psychological etiological factors might be improved if there are clinical signs that patients could confirm themselves, which could be used as reinforcement of clinical discussions. Published associations between psychological disorder and various oral signs and symptoms are not suited to this purpose, as they are ambiguous in origin and implication. Others, used clinically in this situation, are not supported by published literature. Therefore, the purpose of this study was to determine if a demonstrable relationship could be established between psychological profile and the appearance and function of the oral cavity. Seventy-nine participants underwent an oral examination and completed a Depression Anxiety Stress Scale-21 questionnaire. Correlations were calculated between clinical variables and the raw Depression Anxiety Stress Scale scores. Univariate analyses determined variables with significant differences between a high-risk and normal group, and multiple logistic regression models were calculated for these. Various oral signs and symptoms were found to correlate with depression, anxiety, and/or stress, with some predictive of psychological disturbance. These signs and symptoms might be used to reinforce the psychological aspects of an oral dysesthesia.
Hyperventilation and panic attacks
Publisher: SAGE Publications
Date: 06-1990
DOI: 10.3109/00048679009077691
Abstract: The role of hyperventilation in the aetiology of panic attacks is still unclear. This paper briefly reviews the role of hyperventilation and abnormal respiration to panic attacks and examines the experimental evidence. Evidence has been found that physiological variables such as paCO 2 and pH are involved in the aetiology of panic attacks and panic disorder but the extent and the nature of the involvement of cognitive variables is undetermined. Based on current evidence, there is a need to integrate cognitive variables with the physiological framework proposed by the hyperventilation theory. Until clear experimental evidence is produced about the relationships between cognitive and physiological factors, the applicability of hyperventilation in the aetiology and treatment of panic attacks remains in question.
Diffraction-Limited Imaging with a Graphene Metalens*
Publisher: IOP Publishing
Date: 10-2020
DOI: 10.1088/0256-307X/37/10/106801
Abstract: Planar graphene metalens has demonstrated advantages of ultrathin thickness (200 nm), high focusing resolution (343 nm) and efficiency ( %) and robust mechanical strength and flexibility. However, diffraction-limited imaging with such a graphene metalens has not been realized, which holds the key to designing practical integrated imaging systems. In this work, the imaging rule for graphene metalenses is first derived and theoretically verified by using the Rayleigh-Sommerfeld diffraction theory to simulate the imaging performance of the 200 nm ultrathin graphene metalens. The imaging rule is applicable to graphene metalenses in different immersion media, including water or oil. Based on the theoretical prediction, high-resolution imaging using the graphene metalens with diffraction-limited resolution (500 nm) is demonstrated for the first time. This work opens the possibility for graphene metalenses to be applied in particle tracking, microfluidic chips and biomedical devices.
Effective Suppressing Phase Segregation of Mixed‐Halide Perovskite by Glassy Metal‐Organic Frameworks
Publisher: Wiley
Date: 24-08-2023
Abstract: Lead mixed‐halide perovskites offer tunable bandgaps for optoelectronic applications, but illumination‐induced phase segregation can quickly lead to changes in their crystal structure, bandgaps, and optoelectronic properties, especially for the Br–I mixed system because CsPbI3 tends to form a non‐perovskite phase under ambient conditions. These behaviors can impact their performance in practical applications. By embedding such mixed‐halide perovskites in a glassy metal‐organic framework, a family of stable nanocomposites with tunable emission is created. Combining cathodoluminescence with elemental mapping under a transmission electron microscope, this research identifies a direct relationship between the halide composition and emission energy at the nanoscale. The composite effectively inhibits halide ion migration, and consequently, phase segregation even under high‐energy illumination. The detailed mechanism, studied using a combination of spectroscopic characterizations and theoretical modeling, shows that the interfacial binding, instead of the nanoconfinement effect, is the main contributor to the inhibition of phase segregation. These findings pave the way to suppress the phase segregation in mixed‐halide perovskites toward stable and high‐performance optoelectronics.
Exceeding the limit of plasmonic light trapping in textured screen-printed solar cells using Al nanoparticles and wrinkle-like graphene sheets
Publisher: Springer Science and Business Media LLC
Date: 02-08-2013
DOI: 10.1038/LSA.2013.48
Abstract: The solar cell market is predominantly based on textured screen-printed solar cells. Due to parasitic absorption in nanostructures, using plasmonic processes to obtain an enhancement that exceeds 2.5% of the short-circuit photocurrent density is challenging. In this paper, a 7.2% enhancement in the photocurrent density can be achieved through the integration of plasmonic Al nanoparticles and wrinkle-like graphene sheets. For the first time, we experimentally achieve Al nanoparticle-enhanced solar cells. An innovative thermal evaporation method is proposed to fabricate low-coverage Al nanoparticle arrays on solar cells. Due to the ultraviolet (UV) plasmon resonance of Al nanoparticles, the performance enhancement of the solar cells is significantly greater than that from Ag nanoparticles. Subsequently, we deposit wrinkle-like graphene sheets over the Al nanoparticle-enhanced solar cells. Compared with planar graphene sheets, the bend carbon layer also exhibits a broadband light-trapping effect. Our results exceed the limit of plasmonic light trapping in textured screen-printed silicon solar cells.
Unsaturated p-Metal-Based Metal–Organic Frameworks for Selective Nitrogen Reduction under Ambient Conditions
Publisher: American Chemical Society (ACS)
Date: 10-09-2020
A critical review on multifunctional composites as structural capacitors for energy storage
Publisher: Elsevier BV
Date: 03-2018
Observation of Emergent Dirac Physics at the Surfaces of Acoustic Higher‐Order Topological Insulators
Publisher: Wiley
Date: 26-06-2022
Abstract: Using 3D sonic crystals as acoustic higher‐order topological insulators (HOTIs), 2D surface states described by spin‐1 Dirac equations at the interfaces between the two sonic crystals with distinct topology but the same crystalline symmetry are discovered. It is found that the Dirac mass can be tuned by the geometry of the two sonic crystals. The sign reversal of the Dirac mass reveals a surface topological transition where the surface states exhibit zero refractive index behavior. When the surface states are gapped, 1D hinge states emerge due to the topology of the gapped surface states. The zero refractive index behavior and the emergent topological hinge states are confirmed experimentally. This study reveals a multidimensional Wannier orbital control that leads to extraordinary properties of surface states and unveils an interesting topological mechanism for the control of surface waves.
Fundamental Transport Mechanisms and Advancements of Graphene Oxide Membranes for Molecular Separation
Publisher: American Chemical Society (ACS)
Date: 06-03-2019
Direct generation of ultrafast vortex beam from a Tm:CaYAlO4 oscillator featuring pattern matching of a folded-cavity resonator
Publisher: Optica Publishing Group
Date: 10-11-2021
DOI: 10.1364/OE.437584
Abstract: Optical vortices, beams with spiral wavefronts and screw phase dislocations have been explored in applications in optical manipulation, quantum optics, and the next generation of optical communications. In traditional methods, optical vortices are generated using space light modulators or spiral phase plates, which would sharply decrease the integration of optical systems. Different from previous transverse mode conversion outside the cavity, here we experimentally demonstrate a direct generation of ultrafast vortex beam from a Tm:CaYAlO 4 oscillator by pattern matching of a six-mirror-folded-cavity resonator. By accurately adjusted the angle of the end mirror and the distance L between the M4 and the SESAMs to control the beam diameter of laser incidence on the gain medium in the sagittal and tangential planes, a stable 2 µm ultrafast vortex laser emission of annular Laguerre–Gaussian (LG) mode was obtained with a maximum output power of 327 mW and pulse duration of 2.1 ps. A simple YAG crystal plate was used as handedness selector and a homemade Mach–Zehnder (MZ) interferometer has verified the vortical property of the LG 01 mode. By furtherly controlling the cavity mode pattern matching, other stable transverse-mode operations for TEM 00 , high-order Hermite-Gaussian (HG) transverse mode and doughnut-shaped beams were successfully realized. This work provides a flexible and reliable way to generate mid-infrared ultrafast vortex beams and is of special significance for applications in the areas of molecular spectroscopy and organic material processing amongst others.
Near-field visualization of focal depth modulation by step corrugated plasmonic slits
Publisher: AIP Publishing
Date: 13-04-2009
DOI: 10.1063/1.3120542
Abstract: Nanometric plasmonic slits with stepped corrugations have been designed and fabricated to achieve plasmonic focusing and focal depth modulation. A scanning near-field optical microscope is employed to directly visualize the transmitted light from the slits. The near-field and far-field two-dimensional images taken at different planes parallel to the slit surface unambiguously demonstrated the focusing effect of the nanoslits. Furthermore, by forming stepped corrugations with either a concave or a convex profile on both sides of the slits, the phase of the transmitted beam can be effectively manipulated, thus allowing an accurate tuning of the focal depth.
Integrating Covalent Organic Framework with Transition Metal Phosphide for Noble‐Metal‐Free Visible‐Light‐Driven Photocatalytic H2 Evolution
Publisher: Wiley
Date: 25-05-2022
Abstract: 2D covalent organic frameworks (COFs) are considered as one kind of the most promising crystalline porous materials for solar‐driven hydrogen production. However, adding noble metal co‐catalysts into the COFs‐based photocatalytic system is always indispensable. Herein, through a simple solvothermal synthesis method, TpPa‐1‐COF, a typical 2D COF, which displays a wide light absorption region, is rationally combined with transition metal phosphides (TMPs) to fabricate three TMPs/TpPa‐1‐COF hybrid materials, named Ni 12 P 5 (Ni 2 P or CoP)/TpPa‐1‐COF. The incorporated TMPs can be served as electron collectors for accelerating the transfer of charges on TpPa‐1‐COF, thus the composites are demonstrated to be efficient photocatalysts for promoting water splitting. Benefitting from the richer surface reactive sites and lower H* formation energy barrier, the Ni 12 P 5 can most effectively improve the photocatalytic performance of the TpPa‐1‐COF, and the H 2 evolution rate can reach up to 31.6 µmol h −1 , approximately 19 times greater than pristine TpPa‐1‐COF (1.65 µmol h −1 ), and is comparable to the Pt/TpPa‐1‐COF (38.8 µmol h −1 ). This work is the first ex le of combining COFs with TMPs to construct efficient photocatalysts, which may offer new insight for constructing noble‐metal‐free COF‐based photocatalysts.
Transparent gold nano-membranes for the enhanced light trapping of the indium tin oxide films
Publisher: The Optical Society
Date: 17-01-2014
DOI: 10.1364/OME.4.000321
Psychosocial sequelae of the 1989 Newcastle earthquake: III. Role of vulnerability factors in post-disaster morbidity
Publisher: Cambridge University Press (CUP)
Date: 1997
DOI: 10.1017/S003329179600428X
Abstract: Background . This paper examines the contributions of dispositional and non-dispositional factors to post-disaster psychological morbidity. Data reported are from the 845 participants in the longitudinal component of the Quake Impact Study. Methods . The phase 1 survey was used to construct dimensional indices of threat and disruption exposure. Subsequently, a range of dispositional characteristics were measured, including neuroticism, personal hopefulness and defence style. The main morbidity measures were the General Health Questionnaire (GHQ-12) and Impact of Event Scale (IES). Results . Dispositional characteristics were the best predictors of psychological morbidity throughout the 2 years post-disaster, contributing substantially more to the variance in morbidity (12–39%) than did initial exposure (5–12%), but the extent of their contribution was greater for general (GHQ-12) than for post-traumatic (IES) morbidity. Among the non-dispositional factors, avoidance coping contributed equally to general and post-traumatic morbidity ( pr = 0·24). Life events since the earthquake ( pr = 0·18), poor social relationships ( pr =−0·25) and ongoing earthquake-related disruptions ( pr = 0·22) also contributed to general morbidity, while only the latter contributed significantly to post-traumatic morbidity ( pr = 0·15). Conclusions . Medium-term post-earthquake morbidity appears to be a function of multiple factors whose contributions vary depending on the type of morbidity experienced and include trait vulnerability, the nature and degree of initial exposure, avoidance coping and the nature and severity of subsequent events.
Protocol for a randomised controlled trial of risk screening and early intervention comparing child- and family-focused cognitive-behavioural therapy for PTSD in children following accidental injury
Publisher: Springer Science and Business Media LLC
Date: 16-11-2010
IrOx@In2O3 Heterojunction from Individually Crystallized Oxides for Weak‐Light‐Promoted Electrocatalytic Water Oxidation
Publisher: Wiley
Date: 16-11-2021
Abstract: Multi‐field coupling, especially photo‐assisted electrocatalysis, has recently been studied to further improve the oxygen evolution reaction (OER). In this study, an n‐type cubic In 2 O 3 semiconductor is employed for the first time to load IrO x species (Ir‐In 2 O 3 mass ratio: 17.6 %). Consequently, the IrO x @In 2 O 3 heterojunction, which exhibits outstanding OER performance promoted by weak‐light irradiation, is formed. Notably, IrO x (approximately 1.7 nm in size) and In 2 O 3 are observed to crystallize independently during heterogeneous nucleation with no Ir atoms doped in the In 2 O 3 lattice. This avoids Ir loss and ensures the full exposure of all Ir‐based sites. The IrO x @In 2 O 3 heterojunction exhibits enhanced electrocatalytic water oxidation with overpotential values of 190 and 231 mV at current densities of 10 and 50 mA cm −2 , surpassing all IrO x ‐based catalyst results reported to date. Nano‐sized IrO x on the surface, irradiated by the weak‐light beam of LED‐365 (1.8 mW cm −2 ), can be fully activated as an OER site. Moreover, the overpotential is further reduced to 176 and 210 mV to deliver the corresponding current. This work is anticipated to aid in the design of more efficient multi‐field coupling OER systems.
Bound States in the Continuum in Anisotropic Plasmonic Metasurfaces
Publisher: American Chemical Society (ACS)
Date: 06-2020
Strong broadband scattering of anisotropic plasmonic nanoparticles synthesized by controllable growth: effects of lumpy morphology
Publisher: The Optical Society
Date: 11-12-2012
DOI: 10.1364/OME.3.000027
Dual-Polarization Second-Order Photonic Topological Insulators
Publisher: American Physical Society (APS)
Date: 17-03-2021
Map-based cloning identifies velvet A as a critical component of virulence in Fusarium pseudograminearum during infection of wheat heads
Publisher: Elsevier BV
Date: 03-2021
Functional photonic metamaterials
Publisher: IEEE
Date: 10-2011
Triggering the Passivation Effect of Potassium Doping in Mixed‐Cation Mixed‐Halide Perovskite by Light Illumination
Publisher: Wiley
Date: 30-04-2019
Stroke management: Updated recommendations for treatment along the care continuum
Publisher: Wiley
Date: 05-2012
DOI: 10.1111/J.1445-5994.2012.02774.X
Abstract: The Australian Clinical Guidelines for Stroke Management 2010 represents an update of the Clinical Guidelines for Stroke Rehabilitation and Recovery (2005) and the Clinical Guidelines for Acute Stroke Management (2007). For the first time, they cover the whole spectrum of stroke, from public awareness and prehospital response to stroke unit and stroke management strategies, acute treatment, secondary prevention, rehabilitation and community care. The guidelines also include recommendations on transient ischaemic attack. The most significant changes to previous guideline recommendations include the extension of the stroke thrombolysis window from 3 to 4.5 h and the change from positive to negative recommendations for the use of thigh-length antithrombotic stockings for deep venous thrombosis prevention and the routine use of prolonged positioning for contracture management.
Insight into the Reactivity of Carbon Structures for Nitrogen Reduction Reaction
Publisher: American Chemical Society (ACS)
Date: 07-12-2021
Formation of high index three-dimensional inverse woodpile photonic crystals by single infiltration
Publisher: IEEE
Date: 06-2007
Effect of a selective serotonin uptake inhibitor in agoraphobia with panic attacks A double‐blind comparison of zimeldine, imipramine and placebo
Publisher: Wiley
Date: 1986
DOI: 10.1111/J.1600-0447.1986.TB02666.X
Abstract: A double-blind clinical trial of zimeldine, a potent inhibitor of central serotonin reuptake, versus imipramine and placebo was carried out on 44 patients suffering from agoraphobia with panic attacks. Zimeldine was a superior treatment on all rating scales other than a global rating scale which did not reach statistically significant superiority. Imipramine was not shown to be superior to placebo. The implications of these results for further research on the underlying pathophysiology of agoraphobia with panic attacks are discussed.
Electrical and Structural Dual Function of Oxygen Vacancies for Promoting Electrochemical Capacitance in Tungsten Oxide
Publisher: Wiley
Date: 12-2020
All-Optical Generation of Multifunctional and Tunable Longitudinal Magnetization Textures
Publisher: Wiley
Date: 22-06-2022
Abstract: An all‐optical strategy for creating multifunctional and tunable longitudinal magnetization textures is demonstrated. This is realized by flexibly engineering the coherent interferences of two counter‐propagating azimuthally polarized vortex beams possessing on‐demand phase and litude encoding in a 4π optical microscopic setup. In doing so, one can access not only the regular longitudinal magnetization patterns including bright spheroid/needle, dark cage/channel, and bright‐dark alternating chain/comb, but also the exotic twisted counterparts with controllable number of turns, thereby making versatile magnetization on the targeted magneto‐optical media with integrated footprint possible. The presented research findings may hold tremendous potential in multidimensional high density and low energy consumption optomagnetic storage and photonics of spin, and beyond.
Tailoring pores in graphene-based materials: from generation to applications
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7TA04692H
Abstract: Combining the merits from both porous material and graphene, porous graphene-based materials have received significant attention due to their unique porous structures, large surface areas and prominent electrical conductivity.
Influence of rear located silver nanoparticle induced light losses on the light trapping of silicon wafer-based solar cells
Publisher: AIP Publishing
Date: 24-09-2014
DOI: 10.1063/1.4896486
Abstract: Management of the light losses associated with silver nanoparticle integrated plasmonic back reflectors in silicon wafer solar cells is critical to realize performance enhancement. The light losses, including the intrinsic absorption loss from silver nanoparticles and the additional absorption loss induced by the void plasmons in the aluminum reflectors, are quantitatively studied for cells with different front surface morphologies. The study reveals that silver nanoparticles are effective to enhance the photocurrent in cells with planar front surface, while the absorption enhancement can be significantly offset by the plasmonic losses in the textured cells, contributing to marginal or even decreased photocurrent.
Enhanced Four‐Wave Mixing in Silicon Nitride Waveguides Integrated with 2D Layered Graphene Oxide Films
Publisher: Wiley
Date: 19-10-2020
Design of a structural power composite using graphene oxide as a dielectric material layer
Publisher: Elsevier BV
Date: 04-2018
Energy Funneling in Quasi‐2D Ruddlesden–Popper Perovskites: Charge Transfer versus Resonant Energy Transfer
Publisher: Wiley
Date: 05-11-2021
Abstract: The quasi‐2D Ruddlesden–Popper perovskites contain a collection of grains with inhomogeneous bandgaps, enabling efficient energy funneling from high‐bandgap grains (donors) to low‐bandgap grains (acceptors), leading to localization of carriers and suppression of defect trapping. However, the exact mechanism for the energy funneling is still fiercely debated. Charge transfer (CT) via carrier diffusion and Förster resonance energy transfer (FRET) based on dipole interactions are the two conceivable models. Herein, by controlling the degree of energy funneling, both carrier dynamics of donors and acceptors are investigated. Transient absorption (TA) results suggest that the energy funneling mainly occurs at a timescale longer than the FRET mechanism. Moreover, the degree of energy funneling is revealed and the carrier diffusion lengths display a similar dependence on temperature, evidencing the interdomain energy funneling is dominated by CT. This work provides a significant insight into energy funneling mechanism that is important for future developments of optoelectronic devices.
Highly Non‐Linear Quantum Dot Doped Nanocomposites for Functional Three‐Dimensional Structures Generated by Two‐Photon Polymerization
Publisher: Wiley
Date: 02-06-2010
Preparation and Evaluation of Single and Co-Engineered Combination Inhalation Carrier Formulations for the Treatment of Asthma
Publisher: Elsevier BV
Date: 11-2012
DOI: 10.1002/JPS.23304
Spectral redistribution in spontaneous emission from quantum-dot- infiltrated 3D woodpile photonic crystals for telecommunications
Publisher: Wiley
Date: 19-09-2007
Nanostructured Plasmonic Medium for Terahertz Bandwidth All‐Optical Switching
Publisher: Wiley
Date: 24-10-2011
Abstract: Periodic nanostructuring can enhance the optical nonlinearity of plasmonic metals by several orders of magnitude. By patterning a gold film, the largest sub-100 femtosecond nonlinearity is achieved, which is suitable for terahertz rate all-optical data processing as well as ultrafast optical limiters and saturable absorbers.
Engineering van der Waals Materials for Advanced Metaphotonics
Publisher: American Chemical Society (ACS)
Date: 24-06-2022
DOI: 10.1021/ACS.CHEMREV.2C00048
Abstract: The outstanding chemical and physical properties of 2D materials, together with their atomically thin nature, make them ideal candidates for metaphotonic device integration and construction, which requires deep subwavelength light-matter interaction to achieve optical functionalities beyond conventional optical phenomena observed in naturally available materials. In addition to their intrinsic properties, the possibility to further manipulate the properties of 2D materials via chemical or physical engineering dramatically enhances their capability, evoking new science on light-matter interaction, leading to leaped performance of existing functional devices and giving birth to new metaphotonic devices that were unattainable previously. Comprehensive understanding of the intrinsic properties of 2D materials, approaches and capabilities for chemical and physical engineering methods, the resulting property modifications and novel functionalities, and applications of metaphotonic devices are provided in this review. Through reviewing the detailed progress in each aspect and the state-of-the-art achievement, insightful analyses of the outstanding challenges and future directions are elucidated in this cross-disciplinary comprehensive review with the aim to provide an overall development picture in the field of 2D material metaphotonics and promote rapid progress in this fast emerging and prosperous field.
Origin and physical effects of edge states in two-dimensional Ruddlesden-Popper perovskites
Publisher: Elsevier BV
Date: 06-2022
Parental Response to Child Injury: Examination of Parental Posttraumatic Stress Symptom Trajectories Following Child Accidental Injury
Publisher: Oxford University Press (OUP)
Date: 25-04-2010
Abstract: Trajectory analyses were used to empirically differentiate patterns of posttraumatic stress symptoms in parents following child accidental injury and explore the relationship between parent and child recovery patterns. Parent (n = 189) self-reported symptoms from acute to 2 years post accident were examined to (1) identify distinct parent symptom trajectories (2) identify risk factors and (3) explore the patterns of children and parents together. Analysis revealed three distinct symptom trajectory groups for parents: resilient (78%) clinical level acute symptoms that declined to below clinical level by 6 months (recovery 8%) and chronic subclinical (14%). Children of resilient parents were most likely to be resilient. Half of the children of parents with chronic subclinical trajectories were likely to have chronic trajectories. Clinicians cannot rely only on clinical level symptoms in parents to identify high risk families but include families where the parent has subclinical level symptoms.
Lifetime distribution of spontaneous emission from emitter(s) in three-dimensional woodpile photonic crystals
Publisher: The Optical Society
Date: 06-2011
DOI: 10.1364/OE.19.011623
Observation of multiple higher-order stopgaps from three-dimensional chalcogenide glass photonic crystals
Publisher: Optica Publishing Group
Date: 09-10-2008
DOI: 10.1364/OL.33.002311
Abstract: For the first time to our knowledge the observation of near-IR multiple higher-order stopgaps in three-dimensional photonic crystals (PhCs) fabricated using the direct-laser-writing method in thick chalcogenide glass films is reported. The fabrication and etching conditions necessary to realize well-defined structures are presented. The fabricated PhCs exhibit higher-order stopgaps, which are only evident in high-quality structures. The higher-order stopgaps observed permit these high-refractive-index and high-nonlinear PhCs to be used directly as functional photonic devices operating at telecommunication wavelengths without further miniaturizing structural dimensions.
Light-limited photosynthesis under energy-saving film decreases eggplant yield
Publisher: Wiley
Date: 29-08-2020
DOI: 10.1002/FES3.245
Highly Thermally Conductive Dielectric Nanocomposites with Synergistic Alignments of Graphene and Boron Nitride Nanosheets
Publisher: Wiley
Date: 12-03-2020
Highly efficient flexible structured metasurface by roll-to-roll printing for diurnal radiative cooling
Publisher: Springer Science and Business Media LLC
Date: 25-10-2023
Role of Surface Recombination in Halide Perovskite Nanoplatelets
Publisher: American Chemical Society (ACS)
Date: 27-08-2018
Evolutionary topology optimization of periodic composites for extremal magnetic permeability and electrical permittivity
Publisher: Springer Science and Business Media LLC
Date: 31-01-2012
Inverse design of higher-order photonic topological insulators
Publisher: American Physical Society (APS)
Date: 05-2020
NEUROTICISM AND AGE OF ONSET FOR AGORAPHOBIA WITH PANIC ATTACKS
Publisher: Elsevier BV
Date: 09-1909
DOI: 10.1016/0005-7916(90)90006-7
Abstract: The study of the age of onset of psychiatric conditions can provide some clues to the aetiology of these disorders. A number of studies have examined the age of onset in agoraphobia but results have varied. This may be associated with small s le sizes or differences in populations. There has been very little work examining the factors determining age of onset. The present study examines age of onset in relation to sex and personality. Results indicate no sex differences in age of onset, but an association with age and high levels of neuroticism.
Towards enhanced energy density of graphene-based supercapacitors: Current status, approaches, and future directions
Publisher: Elsevier BV
Date: 08-2018
Plasmon-induced long-lived hot electrons in degenerately doped molybdenum oxides for visible-light-driven photochemical reactions
Publisher: Elsevier BV
Date: 05-2022
The Course of Posttraumatic Stress in Children: Examination of Recovery Trajectories Following Traumatic Injury
Publisher: Oxford University Press (OUP)
Date: 17-06-2009
Abstract: Group-based trajectory modeling was used to identify patterns of posttraumatic stress symptom (PTSS) in children 6-16 years following accidental injury. The aims were to: (a) identify probable groups of children following distinct trajectories, and (b) identify risk factors affecting the probability of group membership. Children's Impact of Events Scale (n = 190) was used to assess PTSS up to 2 years post injury. Age, gender, type of injury, and preinjury behavior were assessed as risk factors. Three distinct trajectory groups were identified: resilient (57%), elevated stress symptoms which recovered quickly (33%), and chronic (10%). Younger children were more likely to be in the recovery group. Those with serious injuries were more likely to be in the chronic group. Preinjury child behavior problems were predictive of recovery and high chronic symptoms. Identification of distinct PTSS trajectory groups has implications for understanding the course and treatment of PTSS in children.
Fast Parallel Fabrication of Three-dimensional Photonic Crystals Using the Dynamic Laser Printing Technique
Publisher: OSA
Date: 2010
Children's narrative memory for accidents and their post-traumatic distress
Publisher: Wiley
Date: 2007
DOI: 10.1002/ACP.1294
Laser trimming of graphene oxide for functional photonic applications
Publisher: IOP Publishing
Date: 23-01-2017
Chemical Stabilization of 1T′ Phase Transition Metal Dichalcogenides with Giant Optical Kerr Nonlinearity
Publisher: American Chemical Society (ACS)
Date: 03-02-2017
DOI: 10.1021/JACS.6B13238
Abstract: The 2H-to-1T' phase transition in transition metal dichalcogenides (TMDs) has been exploited to phase-engineer TMDs for applications in which the metallicity of the 1T' phase is beneficial. However, phase-engineered 1T'-TMDs are metastable thus, stabilization of the 1T' phase remains an important challenge to overcome before its properties can be exploited. Herein, we performed a systematic study of the 2H-to-1T' phase evolution by lithiation in ultrahigh vacuum. We discovered that by hydrogenating the intercalated Li to form lithium hydride (LiH), unprecedented long-term (>3 months) air stability of the 1T' phase can be achieved. Most importantly, this passivation method has wide applicability for other alkali metals and TMDs. Density functional theory calculations reveal that LiH is a good electron donor and stabilizes the 1T' phase against 2H conversion, aided by the formation of a greatly enhanced interlayer dipole-dipole interaction. Nonlinear optical studies reveal that air-stable 1T'-TMDs exhibit much stronger optical Kerr nonlinearity and higher optical transparency than the 2H phase, which is promising for nonlinear photonic applications.
Optimization of enhanced absorption in 3D-woodpile metallic photonic crystals
Publisher: Optica Publishing Group
Date: 15-04-2010
DOI: 10.1364/OE.18.009048
Observation of the inverse Doppler effect in negative-index materials at optical frequencies
Publisher: Springer Science and Business Media LLC
Date: 30-06-2011
Tailoring mechanical and electrical properties of graphene oxide film for structural dielectric capacitors
Publisher: Elsevier BV
Date: 2021
Graphene Multilayer Photonic Metamaterials: Fundamentals and Applications
Publisher: Wiley
Date: 03-03-2021
High-photosensitive resin for super-resolution direct-laser-writing based on photoinhibited polymerization
Publisher: The Optical Society
Date: 22-09-2011
DOI: 10.1364/OE.19.019486
Enhanced light trapping in the silicon substrate with plasmonic Ag nanocones
Publisher: The Optical Society
Date: 06-02-2013
DOI: 10.1364/OL.38.000395
Preparation and Electrocatalytic Properties of Polydopamine Functionalized Reduced Graphene Oxide-Silver Nanocomposites
Publisher: Springer Science and Business Media LLC
Date: 05-08-2015
High speed and low power consumption modulator based on electro-optic polymer infiltrated subwavelength grating waveguide ring resonator (Conference Presentation)
Publisher: SPIE
Date: 28-04-2017
DOI: 10.1117/12.2253092
Hybrid anisotropic plasmonic metasurfaces with multiple resonances of focused light beams
Publisher: American Chemical Society (ACS)
Date: 30-08-2021
Detour-phased perovskite ultrathin planar lens using direct femtosecond laser writing
Publisher: Optica Publishing Group
Date: 22-11-2022
DOI: 10.1364/PRJ.472321
Abstract: Perovskite-enabled optical devices have drawn intensive interest and have been considered promising candidates for integrated optoelectronic systems. As one of the important photonic functions, optical phase modulation previously was demonstrated with perovskite substrate and complex refractive index engineering with laser scribing. Here we report on the new scheme of achieving efficient phase modulation by combining detour phase design with 40 nm ultrathin perovskite films composed of nanosized crystalline particles. Phase modulation was realized by binary litude patterning, which significantly simplifies the fabrication process. Perovskite nanocrystal films exhibit significantly weak ion migration effects under femtosecond laser writing, resulting in smooth edges along the laser ablated area and high diffractive optical quality. Fabrication of a detour-phased perovskite ultrathin planar lens with a diameter of 150 μm using femtosecond laser scribing was experimentally demonstrated. A high-performance 3D focus was observed, and the fabrication showed a high tolerance with different laser writing powers. Furthermore, the high-quality imaging capability of perovskite ultrathin planar lenses with a suppressed background was also demonstrated.
Large-size, high-uniformity, random silver nanowire networks as transparent electrodes for crystalline silicon wafer solar cells
Publisher: The Optical Society
Date: 02-04-2013
DOI: 10.1364/OE.21.00A355
On chip chirality-distinguishing beamsplitter
Publisher: The Optical Society
Date: 02-10-2017
DOI: 10.1364/OE.25.024861
Temperature dependence of [100](010) and [001](010) dislocation mobility in natural olivine
Publisher: Elsevier BV
Date: 05-2016
A Meta‐Analysis of Risk Factors That Predict Psychopathology Following Accidental Trauma
Publisher: Wiley
Date: 24-03-2008
DOI: 10.1111/J.1744-6155.2008.00141.X
Abstract: This meta-analysis aimed to explore the risk factors that place a child at risk of psychopathology following accidental trauma. The predictive power of 8 factors was examined via transforming and combining the effect sizes to yield a weighted average effect size for each factor. The results indicated that the majority of effect sizes, although significant, were inconsistent across the studies, yielding little conclusive evidence. However, pretrauma psychopathology and threat to life were strong and consistent predictors. Information gathered from such meta-analyses could be used in the identification of at-risk children and the development of screening tools. However, further widespread and comprehensive reviews of the potential risk factors and their relationships to psychopathology need to be investigated.
Disordered eating behaviours in women with Type 2 diabetes mellitus
Publisher: Elsevier BV
Date: 06-2001
DOI: 10.1016/S1471-0153(01)00028-9
Abstract: The aim of the article is to investigate the relationship between disordered eating, particularly binge eating, and Type 2 diabetes in women. Subjects included 215 women with Type 2 diabetes (mean age: 58.9 years, mean body mass index (BMI)=33.5 kg/m(2)). Measurements included a structured clinical interview for disordered eating (Eating Disorder Examination, EDE), self-report measures of psychological functioning, glycosylated haemoglobin A1c, BMI. A total of 20.9% of women was binge eating regularly. Binge eating was associated with poorer well being, earlier age of diagnosis, poorer self-efficacy for diet and exercise self-management, and higher BMI. Binge eating frequency predicted blood glucose control after controlling for BMI and exercise level. A history of binge eating independently predicted age of diagnosis of diabetes. Binge eating is relatively common in women with Type 2 diabetes. The relationship between binge eating severity and diabetic control is not explained by overweight. Binge eating may be an independent risk factor for Type 2 diabetes.
Low-overpotential electrochemical ammonia synthesis using BiOCl-modified 2D titanium carbide MXene
Publisher: Elsevier BV
Date: 2022
An ultrahigh sensitivity micro-cliff graphene wearable pressure sensor made by instant flash light exposure
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1NR04333A
Abstract: A graphene micro-cliff pressure sensor, fabricated using a single flashlight exposure, features ultrahigh sensitivity, fast response and low detection limit.
Group therapy for binge eating in Type 2 diabetes: A randomized trial
Publisher: Wiley
Date: 03-2002
Graphene Metapixels for Dynamically Switchable Structural Color
Publisher: American Chemical Society (ACS)
Date: 14-05-2021
A Theoretical Study of Infrared Spectra of Highly Positively Charged C60 Fullerenes and Their Relevance to Observed UIE Features
Publisher: American Astronomical Society
Date: 07-2022
Complexities in Understanding the Role of Compensation-Related Factors on Recovery From Whiplash-Associated Disorders
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 12-2011
Spectroscopic Insight into Efficient and Stable Hole Transfer at the Perovskite/Spiro-OMeTAD Interface with Alternative Additives
Publisher: American Chemical Society (ACS)
Date: 20-01-2021
Use of two-photon polymerization for continuous gray-level encoding of diffractive optical elements
Publisher: AIP Publishing
Date: 12-02-2007
DOI: 10.1063/1.2426923
Abstract: Generation of continuous gray levels in three-dimensional diffractive optical elements has remained a challenge with the current semiconductor microfabrication method. In this letter, the authors propose and demonstrate the use of the two-photon polymerization method for fabricating three-dimensional diffractive optical elements of continuous gray levels. This method is a mask-free and low-cost single-step process. It is shown that the multilevel-phase-encoded diffractive optical element fabricated in inorganic-organic hybrid polymer material facilitates the intensity distribution synthesis with a high diffraction efficiency approaching the theoretical limit.
Tracking Dynamic Phase Segregation in Mixed‐Halide Perovskite Single Crystals under Two‐Photon Scanning Laser Illumination
Publisher: Wiley
Date: 23-05-2019
Tuning the florescence color of gradient bandgap perovskite nanoplate by direct laser writing
Publisher: SPIE
Date: 31-12-2019
DOI: 10.1117/12.2539852
The Dominant Energy Transport Pathway in Halide Perovskites: Photon Recycling or Carrier Diffusion?
Publisher: Wiley
Date: 04-2019
Comparison of palmtop-computer-assisted brief cognitive-behavioral treatment to cognitive-behavioral treatment for panic disorder
Publisher: American Psychological Association (APA)
Date: 1997
The clinical relevance of symptom amplification [1] (multiple letters)
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 02-2004
Large Third-Order Optical Kerr Nonlinearity in Nanometer-Thick PdSe2 2D Dichalcogenide Films: Implications for Nonlinear Photonic Devices
Publisher: American Chemical Society (ACS)
Date: 29-06-2020
Topology‐Optimized 3D Photonic Structures with Maximal Omnidirectional Bandgaps
Publisher: Wiley
Date: 20-09-2018
The 5-Item Mental Health Index Predicts the Initial Diagnosis of Nonfatal Stroke in Older Women
Publisher: Mary Ann Liebert Inc
Date: 07-2008
Abstract: Relatively little is known about psychosocial risk factors for the onset of stroke. The aim of this paper is to identify independent psychosocial risk factors for subsequent reported new diagnoses of stroke in older women. A prospective cohort study of women initially aged between 70 and 75 years was first surveyed in 1996 and again in 1999. During this interval, from a final s le of 7839 participants, 174 women reported that a doctor had diagnosed them with stroke for the first time. A range of psychosocial risk factors measured in 1996 (life events, Mental Health Index [MHI-5], having a partner, Perceived Stress Scale, Duke Social Support Index, educational attainment, location of residence, feelings of time pressure) were entered into binary logistic regression models to examine which would predict the self-reported new diagnosis of stroke over the 3-year period after adjusting for a range of biomedical risk factors and the frequency of general practitioner visits in 1996. Only the MHI-5 proved to be a significant predictor of self-reported new stroke diagnosis. The MHI-5 remained a significant risk factor (OR 1.61, 95% CI 1.01-2.55, p < 0.05) even after adjusting for a range of other possible risk factors (body mass index, physical activity, alcohol status, diabetes, heart disease, hypertension, nutritional risk) and frequency of general practitioner visits. Poor mental health appears to be a risk factor for the self-reported new diagnosis of stroke in older women. The 5-item MHI may be a useful instrument for researchers investigating the relationship between psychosocial variables and stroke in older women and for clinicians who wish to identify those at risk for stroke.
Novel Optical and Photonic Devices based on 2D Materials: feature issue introduction
Publisher: Optica Publishing Group
Date: 04-05-2020
DOI: 10.1364/OME.396413
Abstract: Since the isolation of graphene in 2004, two-dimensional (2D) materials with unique optical and electronic properties have attracted a wide interest and tremendous research, opening some promising applications in electronics, photonics and optoelectronics. This feature issue is aimed to capture the current state-of-the art, new trends and directions in 2D-material-based optical and photonic devices, and seven research articles are collected in this issue.
Physical and psychological factors maintain long-term predictive capacity post-whiplash injury
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 05-2006
Five-fold plasmonic Fano resonances with giant bisignate circular dichroism
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8NR05277H
Abstract: Chiral metamaterials with versatile designs can exhibit orders of magnitude enhancement in chiroptical responses compared with that of the natural chiral media.
Light soak study of perovskite-based materials via scanning imaging spectroscopy
Publisher: SPIE
Date: 31-12-2019
DOI: 10.1117/12.2539988
Enhanced four-wave mixing in graphene oxide coated waveguides
Publisher: OSA
Date: 2018
Engineering the carrier dynamics of g-C3N4 by rolling up planar sheets into nanotubes via ultrasonic cavitation
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8NR06560H
Abstract: A simple and clean ultrasonic method is developed to curve 2D g-C 3 N 4 sheets into 1D nanotubes.
An accurate design of graphene oxide ultrathin flat lens based on Rayleigh-Sommerfeld theory
Publisher: Opto-Electronic Advances
Date: 2018
Psychosocial sequelae of the 1989 Newcastle earthquake: II. Exposure and morbidity profiles during the first 2 years post-disaster
Publisher: Cambridge University Press (CUP)
Date: 1997
DOI: 10.1017/S0033291796004278
Abstract: Background . A s le of 1089 Australian adults was selected for the longitudinal component of the Quake Impact Study, a 2-year, four-phase investigation of the psychosocial effects of the 1989 Newcastle earthquake. Of these, 845 (78%) completed a survey 6 months post-disaster as well as one or more of the three follow-up surveys. Methods . The phase 1 survey was used to construct dimensional indices of self-reported exposure to threat the disruption and also to classify subjects by their membership of five ‘at risk’ groups (the injured the displaced owners of damaged small businesses helpers in threat and non-threat situations). Psychological morbidity was assessed at each phase using the 12-item General Health Questionnaire (GHQ-12) and the Impact of Event Scale (IES). Results . Psychological morbidity declined over time but tended to stabilize at about 12 months post-disaster for general morbidity (GHQ-12) and at about 18 months for trauma-related (IES) morbidity. Initial exposure to threat and/or disruption were significant predictors of psychological morbidity throughout the study and had superior predictive power to membership of the targeted ‘at risk’ groups. The degree of ongoing disruption and other life events since the earthquake were also significant predictors of morbidity. The injured reported the highest levels of distress, but there was a relative absence of morbidity among the helpers. Conclusions . Future disaster research should carefully assess the threat and disruption experiences of the survivors at the time of the event and monitor ongoing disruptions in the aftermath in order to target interventions more effectively.
Similar factors predict disability and posttraumatic stress disorder trajectories after whiplash injury
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 06-2011
Improved multicrystalline Si solar cells by light trapping from Al nanoparticle enhanced antireflection coating
Publisher: The Optical Society
Date: 21-03-2013
DOI: 10.1364/OME.3.000489
Efficiency enhancement of screen-printed multicrystalline silicon solar cells by integrating gold nanoparticles via a dip coating process
Publisher: The Optical Society
Date: 20-01-2012
DOI: 10.1364/OME.2.000190
An electro-activated bimetallic zinc-nickel hydroxide cathode for supercapacitor with super-long 140,000 cycle durability
Publisher: Elsevier BV
Date: 04-2021
Controllable Acceleration and Deceleration of Charge Carrier Transport in Metal‐Halide Perovskite Single‐Crystal by Cs‐Cation Induced Bandgap Engineering
Publisher: Wiley
Date: 28-04-2022
Abstract: Charge carrier transport in materials is of essential importance for photovoltaic and photonic applications. Here, the authors demonstrate a controllable acceleration or deceleration of charge carrier transport in specially structured metal‐alloy perovskite (MACs)PbI 3 (MA= CH 3 NH 3 ) single‐crystals with a gradient composition of CsPbI 3 /(MA 1− x Cs x )PbI 3 /MAPbI 3 . Depending on the Cs‐cation distribution in the structure and therefore the energy band alignment, two different effects are demonstrated: i) significant acceleration of electron transport across the depth driven by the gradient band alignment and suppression of electron–hole recombination, benefiting for photovoltaic and detector applications and ii) decelerated electron transport and thus improved radiative carrier recombination and emission efficiency, highly beneficial for light and display applications. At the same time, the top Cs‐layer results in hole localization in the top layer and surface passivation. This controllable acceleration and deceleration of electron transport is critical for various applications in which efficient electron–hole separation and suppressed nonradiative electron–hole recombination is demanded.
Tailoring specific properties of polymer-based composites by using graphene and its associated compounds
Publisher: Informa UK Limited
Date: 02-04-2020
Microstructural design for 2D photonic crystals with large polarization-independent band gaps
Publisher: Elsevier BV
Date: 11-2017
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Amount: $375,000.00
Funder: Australian Research Council
View Funded ActivityDiscovery Projects - Grant ID: DP220100603
Start Date: 04-2022
End Date: 04-2025
Amount: $570,000.00
Funder: Australian Research Council
View Funded ActivityARC Future Fellowships - Grant ID: FT210100806
Start Date: 04-2022
End Date: 04-2026
Amount: $1,065,428.00
Funder: Australian Research Council
View Funded ActivityLinkage Projects - Grant ID: LP210200345
Start Date: 10-2023
End Date: 10-2026
Amount: $686,081.00
Funder: Australian Research Council
View Funded ActivityLinkage Projects - Grant ID: LP210200504
Start Date: 12-2022
End Date: 11-2025
Amount: $548,000.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE230100024
Start Date: 2023
End Date: 12-2023
Amount: $909,754.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE110100121
Start Date: 2011
End Date: 12-2012
Amount: $360,000.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE230100005
Start Date: 2023
End Date: 12-2023
Amount: $852,787.00
Funder: Australian Research Council
View Funded ActivityARC Centres Of Excellence - Grant ID: CE230100006
Start Date: 2023
End Date: 12-2029
Amount: $34,948,820.00
Funder: Australian Research Council
View Funded ActivityDiscovery Projects - Grant ID: DP190103186
Start Date: 2019
End Date: 12-2021
Amount: $340,000.00
Funder: Australian Research Council
View Funded ActivityIndustrial Transformation Training Centres - Grant ID: IC180100005
Start Date: 03-2019
End Date: 03-2025
Amount: $4,889,410.00
Funder: Australian Research Council
View Funded Activity