ORCID Profile
0000-0003-4581-0560
Current Organisations
UNSW Sydney
,
Macquarie University
,
University of Technology Sydney
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
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)
Functional Materials | Materials Engineering | Functional materials | Materials engineering | Composite and Hybrid Materials | Nanomaterials | Renewable Power and Energy Systems Engineering (excl. Solar Cells) | Composite and hybrid materials | Ceramics | Structural Chemistry and Spectroscopy | Energy Generation, Conversion and Storage Engineering | Condensed Matter Physics | Sensor Technology (Chemical aspects) | Technical, Further and Workplace Education | Nanomaterials | Nanotechnology | Photonics optoelectronics and optical communications | Nanoscale characterisation | Nanotechnology | Teacher Education and Professional Development of Educators | Photonics, Optoelectronics and Optical Communications | Nanotechnology not elsewhere classified | Electrochemical energy storage and conversion | Medical Devices | Electrical and Electronic Engineering | Education Systems | Electronic and Magnetic Properties of Condensed Matter; Superconductivity
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in Technology | Energy Storage (excl. Hydrogen) | Ceramics | Expanding Knowledge in the Chemical Sciences | Management of Greenhouse Gas Emissions from Electricity Generation | Computer Hardware and Electronic Equipment not elsewhere classified | Education and Training Systems Policies and Development | Consumer Electronic Equipment (excl. Communication Equipment) | Integrated Circuits and Devices | Management of Greenhouse Gas Emissions from Manufacturing Activities | Teacher and Instructor Development | Diagnostic Methods | Medical Instruments | Expanding Knowledge in the Physical Sciences | Expanding Knowledge in Engineering | Health Status (e.g. Indicators of Well-Being) |
Related Links
Publications
Correlating morphology and doping effects with the carbon monoxide catalytic activity of Zn doped CeO2 nanocrystals
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7CY01999H
Abstract: The morphology-dependent doping effects on CeO 2 nanocrystals were investigated for the catalytic oxidation of carbon monoxide (CO).
Growth and electrical properties of ZnO films prepared by chemical bath deposition method
Publisher: Wiley
Date: 04-2009
Recent advances in water-induced electricity generation based on 2D materials: A review
Publisher: Springer Science and Business Media LLC
Date: 10-11-2022
Realizing high reversibility and safety of Zn anode via binary mixture of organic solvents
Publisher: Elsevier BV
Date: 03-2023
Synthesis and Mechanism of High Structural Stability of Nickel-Rich Cathode Materials by Adjusting Li-Excess
Publisher: American Chemical Society (ACS)
Date: 14-08-2020
Composition dependence of the microstructure and soft magnetic properties of Fe-based amorphous/nanocrystalline alloys: A review study
Publisher: Elsevier BV
Date: 05-2014
Tuning the phase and morphology of In2O3nanocrystals via simple solution routes
Publisher: IOP Publishing
Date: 19-09-2007
Threshold Switching Induced by Controllable Fragmentation in Silver Nanowire Networks
Publisher: American Chemical Society (ACS)
Date: 09-01-2018
Abstract: Silver nanowire (Ag NW) networks have been widely studied because of a great potential in various electronic devices. However, nanowires usually undergo a fragmentation process at elevated temperatures due to the Rayleigh instability that is a result of reduction of surface/interface energy. In this case, the nanowires become completely insulating due to the formation of randomly distributed Ag particles with a large distance and further applications are hindered. Herein, we demonstrate a novel concept based on the combination of ultraviolet/ozone irradiation and a low-temperature annealing process to effectively utilize and control the fragmentation behavior to realize the resistive switching performances. In contrast to the conventional fragmentation, the designed Ag/AgO
Development of ferroelectric oxides based resistive switching materials
Publisher: Informa UK Limited
Date: 30-08-2017
Electric double-layer transistors: a review of recent progress
Publisher: Springer Science and Business Media LLC
Date: 03-06-2015
Highly Efficient and Selective Cu/MnOx Catalysts for Carbon Dioxide Reduction
Publisher: American Chemical Society (ACS)
Date: 21-06-2018
Valence-Regulated Metal Doping of Mixed-Halide Perovskites to Modulate Phase Segregation and Solar Cell Performance
Publisher: American Chemical Society (ACS)
Date: 27-10-2022
Relieving Stress Concentration through Anion–Cation Codoping toward Highly Stable Nickel-Rich Cathode
Publisher: American Chemical Society (ACS)
Date: 04-10-2023
An integrated surface coating strategy to enhance the electrochemical performance of nickel-rich layered cathodes
Publisher: Elsevier BV
Date: 2022
Recent progress in artificial synaptic devices: Materials, processing and applications
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TC01211H
Abstract: This review focuses on recent development in artificial synaptic devices, including working principles, device structures, processing techniques, energy consumption, the functional materials of artificial synapses and applications.
Vanadium doped 1T MoS2 nanosheets for highly efficient electrocatalytic hydrogen evolution in both acidic and alkaline solutions
Publisher: Elsevier BV
Date: 04-2021
Engineering Silver Nanowire Networks: From Transparent Electrodes to Resistive Switching Devices
Publisher: American Chemical Society (ACS)
Date: 06-06-2017
Abstract: Metal nanowires (NWs) networks with high conductance have shown potential applications in modern electronic components, especially the transparent electrodes over the past decade. In metal NW networks, the electrical connectivity of nanoscale NW junction can be modulated for various applications. In this work, silver nanowire (Ag NW) networks were selected to achieve the desired functions. The Ag NWs were first synthesized by a classic polyol process, and spin-coated on glass to fabricate transparent electrodes. The as-fabricated electrode showed a sheet resistance of 7.158 Ω □
Synergistic Effect of Nitrogen–Sulfur Codoping on Honeycomb-like Carbon-Based High-Energy-Density Zinc-Ion Hybrid Supercapacitors
Publisher: American Chemical Society (ACS)
Date: 27-02-2023
Construction of Z-Scheme System for Enhanced Photocatalytic H2 Evolution Based on CdS Quantum Dots/CeO2 Nanorods Heterojunction
Publisher: American Chemical Society (ACS)
Date: 05-01-2018
Magnetic and Conductive Liquid Metal Gels
Publisher: American Chemical Society (ACS)
Date: 08-04-2020
Flexible, Printable Soft‐X‐Ray Detectors Based on All‐Inorganic Perovskite Quantum Dots
Publisher: Wiley
Date: 06-06-2019
Abstract: Metal halide perovskites represent a family of the most promising materials for fascinating photovoltaic and photodetector applications due to their unique optoelectronic properties and much needed simple and low-cost fabrication process. The high atomic number (Z) of their constituents and significantly higher carrier mobility also make perovskite semiconductors suitable for the detection of ionizing radiation. By taking advantage of that, the direct detection of soft-X-ray-induced photocurrent is demonstrated in both rigid and flexible detectors based on all-inorganic halide perovskite quantum dots (QDs) synthesized via a solution process. Utilizing a synchrotron soft-X-ray beamline, high sensitivities of up to 1450 µC Gy
Synthesis of Room-Temperature Ferromagnetic Co-Doped ZnO Nanocrystals under a High Magnetic Field
Publisher: American Chemical Society (ACS)
Date: 29-03-2007
DOI: 10.1021/JP0684067
UV irradiation induced reversible graphene band gap behaviors
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TC03466G
Abstract: Both experiments and DFT calculations show UV irradiation can tune the band gap of graphene. Most importantly, such a band gap transition is reversible and can be controlled by the alternative treatment of UV irradiation and dark storage.
Digital to analog resistive switching transition induced by graphene buffer layer in strontium titanate based devices
Publisher: Elsevier BV
Date: 02-2018
DOI: 10.1016/J.JCIS.2017.10.113
Abstract: Resistive switching behaviour can be classified into digital and analog switching based on its abrupt and gradual resistance change characteristics. Realizing the transition from digital to analog switching in the same device is essential for understanding and controlling the performance of the devices with various switching mechanisms. Here, we investigate the resistive switching in a device made with strontium titanate (SrTiO
A Solution‐Processed All‐Perovskite Memory with Dual‐Band Light Response and Tri‐Mode Operation
Publisher: Wiley
Date: 05-01-2022
Abstract: Integrating multiple semiconductors with distinct physical properties is a practical design strategy for realizing novel optoelectronic devices with unprecedented functionalities. In this work, a photonic resistive switching (RS) memory is demonstrated based on solution‐processed bilayers of strontium titanate (SrTiO 3 or STO) quantum dots (QDs) and all‐inorganic halide perovskite CsPbBr 3 (CPB) with an Ag/STO/CPB/Au architecture. Compared with the single‐layer STO or CPB RS device, the double‐layer device shows considerably improved RS performance with a high switching ratio over 10 5 , an endurance of 3000 cycles, and a retention time longer than 2 × 10 4 s. The formation of heterojunction between STO and CPB significantly enhances the high resistance state, and the separation of the active silver electrode and the CPB layer contributes to the long‐term stability. More importantly, the photonic RS device exhibits UV–visible dual‐band response due to the photogating effect and the light‐induced modification of the heterojunction barrier. Last, tri‐mode operation, i.e., photodetector, memory, and photomemory, is demonstrated via tailoring the light and electric stimuli. This bilayer device architecture provides a unique approach toward enhancing the performance of photoresponsive data‐storage devices.
Fabrication of High-Performance CsPbBr3 Perovskite Quantum Dots/Polymer Composites via Photopolymerization: Implications for Luminescent Displays and Lighting
Publisher: American Chemical Society (ACS)
Date: 19-12-2022
Indigo: A Natural Molecular Passivator for Efficient Perovskite Solar Cells
Publisher: Wiley
Date: 09-2022
Colossal barocaloric effects in the complex hydride Li$$_{2}$$B$$_{12}$$H$$_{12}$$
Publisher: Springer Science and Business Media LLC
Date: 07-06-2021
DOI: 10.1038/S41598-021-91123-4
Abstract: Traditional refrigeration technologies based on compression cycles of greenhouse gases pose serious threats to the environment and cannot be downscaled to electronic device dimensions. Solid-state cooling exploits the thermal response of caloric materials to changes in the applied external fields (i.e., magnetic, electric and/or mechanical stress) and represents a promising alternative to current refrigeration methods. However, most of the caloric materials known to date present relatively small adiabatic temperature changes ( $$|\Delta T| \sim 1$$ | Δ T | ∼ 1 to 10 K) and/or limiting irreversibility issues resulting from significant phase-transition hysteresis. Here, we predict by using molecular dynamics simulations the existence of colossal barocaloric effects induced by pressure (isothermal entropy changes of $$|\Delta S| \sim 100$$ | Δ S | ∼ 100 J K $$^{-1}$$ - 1 kg $$^{-1}$$ - 1 ) in the energy material Li $$_{2}$$ 2 B $$_{12}$$ 12 H $$_{12}$$ 12 . Specifically, we estimate $$|\Delta S| = 367$$ | Δ S | = 367 J K $$^{-1}$$ - 1 kg $$^{-1}$$ - 1 and $$|\Delta T| = 43$$ | Δ T | = 43 K for a small pressure shift of P = 0.1 GPa at $$T = 480$$ T = 480 K. The disclosed colossal barocaloric effects are originated by a fairly reversible order–disorder phase transformation involving coexistence of Li $$^{+}$$ + diffusion and (BH) $$_{12}^{-2}$$ 12 - 2 reorientational motion at high temperatures.
Carbon nanofiber-reinforced strain sensors with high breathability and anisotropic sensitivity
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TA08521B
Abstract: In this work, we present a new method of creating fibre-metal composites to effectively modulate the in-plane fracture behaviour of brittle conductive thin metal films on stretchable PDMS substrates via insertion of a toughening interlayer of CNFs.
Sodium ion stabilized ammonium vanadate as a high-performance aqueous zinc-ion battery cathode
Publisher: Elsevier BV
Date: 10-2022
Oxygen-vacancy induced magnetic phase transitions in multiferroic thin films
Publisher: Springer Science and Business Media LLC
Date: 05-06-2020
DOI: 10.1038/S41524-020-0344-3
Abstract: Multiferroics in which giant ferroelectric polarization and magnetism coexist are of tremendous potential for engineering disruptive applications in information storage and energy conversion. Yet the functional properties of multiferroics are thought to be affected detrimentally by the presence of point defects, which may be abundant due to the volatile nature of some constituent atoms and the high temperatures involved in the synthesis of materials. Here, we demonstrate with theoretical methods that oxygen vacancies may enhance the functionality of multiferroics by radically changing their magnetic interactions in thin films. Specifically, oxygen vacancies may restore missing magnetic super-exchange interactions in large axial ratio phases, leading to full antiferromagnetic spin ordering, and induce the stabilization of ferrimagnetic states with considerable net magnetizations. Our theoretical study should help to clarify the origins of long-standing controversies in bismuth ferrite and improve the design of technological applications based on multiferroics.
Electrochemical Processes in Manufacturing
Publisher: Springer London
Date: 30-09-2014
Facile Synthesis, Characterization of ZnO Nanotubes and Nanoflowers in an Aqueous Solution
Publisher: Wiley
Date: 26-02-2010
Ethanol-directed morphological evolution of hierarchical CeOx architectures as advanced electrochemical capacitors
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA02962G
Abstract: A facile and versatile electrochemical synthesis route was adopted to construct various CeO x hierarchical nano-microstructures for advanced electrochemical capacitors.
Enhanced performance of doped BiOCl nanoplates for photocatalysis: understanding from doping insight into improved spatial carrier separation
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7TA02724A
Abstract: Doped BiOCl nanoplates enclosed with (001) and (110) facets were fabricated to demonstrate the role of doping in promoting spatial carrier separation.
Linking Phase Segregation and Photovoltaic Performance of Mixed-Halide Perovskite Films through Grain Size Engineering
Publisher: American Chemical Society (ACS)
Date: 04-2021
The effect of heat treatment and cyclic loading on nanoindentation behaviour of FeSiB amorphous alloy
Publisher: Elsevier BV
Date: 02-2016
Unique FeP@C with polyhedral structure in-situ coated with reduced graphene oxide as an anode material for lithium ion batteries
Publisher: Elsevier BV
Date: 11-2020
Structure and defect strategy towards high-performance copper niobate as anode for Li-ion batteries
Publisher: Elsevier BV
Date: 2023
Oxygen vacancies and band gap engineering of vertically aligned MnO2 porous nanosheets for efficient oxygen evolution reaction
Publisher: Elsevier BV
Date: 10-2021
Oxygen Defect and Cl–-Doped Modulated TiNb2O7 Compound with High Rate Performance in Lithium-Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 11-09-2023
Aqueous synthesis of single-crystalline ZnO prisms on graphite substrates
Publisher: Elsevier BV
Date: 2011
Fast synthesis, optical and bio-sensor properties of SnO2 nanostructures by electrochemical deposition
Publisher: Elsevier BV
Date: 04-2011
Boosting moisture induced electricity generation from graphene oxide through engineering oxygen-based functional groups
Publisher: Elsevier BV
Date: 04-2022
Tunable Type I and II heterojunction of CoOx nanoparticles confined in g-C3 N4 nanotubes for photocatalytic hydrogen production
Publisher: Elsevier BV
Date: 05-2019
Formation and photocatalytic activity of BaTiO<inf>3</inf> nanocubes via hydrothermal process
Publisher: Hindawi Limited
Date: 2015
DOI: 10.1155/2015/692182
Abstract: We reported a facile hydrothermal approach to synthesize BaTiO 3 nanocubes with controlled sizes for degradation of methylene blue (MB). The nanocubes with reaction time of 48 hours exhibited the highest photocatalytic efficiency, owing to their narrower size distribution and better crystallinity compared to those of 24 hours and, at the meantime, smaller particle size than those of 72 hours. This work also demonstrated the degradation of methylene orange (MO) using BaTiO 3 nanocubes synthesized for 48 hours. Compared with the removal of MB, BaTiO 3 had lower photocatalytic activity on MO, mainly due to the poorer absorption behavior of MO on the surface of BaTiO 3 nanocubes. The degradation efficiency for each photocatalytic reaction was calculated. The possible mechanism of the photocatalytic decomposition on MB has been addressed as well.
Optical and adsorption properties of ZnO nanotubes prepared from aqueous solutions
Publisher: IEEE
Date: 2010
Controlled fabrication of Pr(OH)3 nanowires for enhanced photocatalytic activities
Publisher: Elsevier BV
Date: 2019
PBC@cellulose-filter paper separator design with efficient ion transport properties toward stabilized zinc-ion battery
Publisher: Elsevier BV
Date: 10-2022
Bridging NiCo layered double hydroxides and Ni3S2 for bifunctional electrocatalysts
Publisher: Elsevier BV
Date: 07-2021
Improving thermal and electrical stability of silver nanowire network electrodes through integrating graphene oxide intermediate layers
Publisher: Elsevier BV
Date: 04-2020
Lab free protein-based moisture electric generators with a high electric output
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3EE00770G
Abstract: Illustration of protein-based MEG generating electricity by absorbing water from moisture.
Optimizing surface chemistry of PbS colloidal quantum dot for highly efficient and stable solar cells via chemical binding
Publisher: Wiley
Date: 27-11-2021
Abstract: The surface chemistry of colloidal quantum dots (CQD) play a crucial role in fabricating highly efficient and stable solar cells. However, as‐synthesized PbS CQDs are significantly off‐stoichiometric and contain inhomogeneously distributed S and Pb atoms at the surface, which results in undercharged Pb atoms, dangling bonds of S atoms and uncapped sites, thus causing surface trap states. Moreover, conventional ligand exchange processes cannot efficiently eliminate these undesired atom configurations and defect sites. Here, potassium triiodide (KI 3 ) additives are combined with conventional PbX 2 matrix ligands to simultaneously eliminate the undercharged Pb species and dangling S sites via reacting with molecular I 2 generated from the reversible reaction KI 3 ⇌ I 2 + KI. Meanwhile, high surface coverage shells on PbS CQDs are built via PbX 2 and KI ligands. The implementation of KI 3 additives remarkably suppresses the surface trap states and enhances the device stability due to the surface chemistry optimization. The resultant solar cells achieve the best power convention efficiency of 12.1% and retain 94% of its initial efficiency under 20 h continuous operation in air, while the control devices with KI additive deliver an efficiency of 11.0% and retains 87% of their initial efficiency under the same conditions.
Reversible transition of graphene from hydrophobic to hydrophilic in the presence of an electric field
Publisher: American Chemical Society (ACS)
Date: 04-09-2012
DOI: 10.1021/JP3050466
Power generation for wearable systems
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0EE03911J
Abstract: The mechanisms, figures of merit, and systems for wearable power generation are reviewed in this article. Future perspectives lie in breakthrough technologies of fiber electronics, fully printable, flexible SoC, and IoT-enabled self-awareness systems.
Voltage sweep modulated conductance quantization in oxide nanocomposites
Publisher: Royal Society of Chemistry (RSC)
Date: 10-10-2014
DOI: 10.1039/C4TC01984A
Interface Thermodynamic State-Induced High-Performance Memristors
Publisher: American Chemical Society (ACS)
Date: 21-01-2014
DOI: 10.1021/LA404389B
Abstract: A new class of memristors based on long-range-ordered CeO2 nanocubes with a controlled degree of self-assembly is presented, in which the regularity and range of the nanocubes can be greatly improved with a highly concentrated dispersed surfactant. The magnitudes of the hydrophobicity and surface energy components as functions of surfactant concentration were also investigated. The self-assembled nanostructure was found to demonstrate excellent degradation in device threshold voltage with excellent uniformity in resistive switching parameters, particularly a set voltage distribution of ∼ 0.2 V over 30 successive cycles and a fast response time for writing (0.2 μs) and erasing (1 μs) operations, thus offering great potential for nonvolatile memory applications with high performance at low cost.
Synergistic effects of an artificial carbon coating layer and Cu2+-electrolyte additive for high-performance zinc-based hybrid supercapacitors
Publisher: Elsevier BV
Date: 10-2022
Novel two-dimensional Bi4V2O11 nanosheets: controllable synthesis, characterization and insight into the band structure
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7CE02151H
Abstract: Novel two-dimensional Bi 4 V 2 O 11 nanosheets were controllably prepared using a stable [Bi(EDTA)] − complex, and their band structures were investigated as well.
Probing complementary memristive characteristics in oxide based memory device via non-conventional chronoamperometry approach
Publisher: AIP Publishing
Date: 18-01-2016
DOI: 10.1063/1.4940384
Abstract: In this letter, the resistive switching characteristics of CeO2 based memristor are investigated by utilizing an unusual, non-conventional, and a unique approach of “chrono erometry.” This methodology provides useful insights into memristive characterization for achieving configurable device functionalities such as categorization of minimum threshold potential to prompt switching behaviour, tuneable on/off ratios with accessible multi-level data storage states, etc. Moreover, the analytical studies on carrier drift/diffusion controlled-memristor response and the estimation of time constants at various applied fixed potentials provide tangible evidence to support valence change mechanism in CeO2 based memristors.
Quantum dots for photovoltaics
Publisher: Wiley
Date: 17-04-2021
Electrochemical performance of Li1.2Ni0.2Mn0.6O2 coated with a facilely synthesized Li1.3Al0.3Ti1.7(PO4)3
Publisher: Elsevier BV
Date: 11-2018
Recent progress in high Bs and low Hc Fe-based nanocrystalline alloys
Publisher: Walter de Gruyter GmbH
Date: 2014
Highly dispersed platinum deposited on nitrogen-doped vertical graphene array for efficient electrochemical hydrogen evolution
Publisher: IOP Publishing
Date: 25-07-2022
Abstract: The electrochemical hydrogen evolution is a key technology for future renewable energy conversion and storage. Platinum is the most efficient catalyst for hydrogen evolution reaction (HER), but its mass activity should be boosted further. Herein, we deposited platinum on nitrogen-doped vertical graphene through an atomic layer deposition method. Aberration-corrected high-angle annular dark-field scanning transmission electron microscopy confirmed that the platinum was highly dispersed on the array substrate. On account of the array structure and high dispersion of platinum, the synthesized catalyst exhibited high HER performance with a low overpotential of 42 mV at 10 mA cm −2 and a low Tafel slope of 52.2 mV dec −1 . Significantly, the synthesized catalyst exhibited a high mass activity of 4.45 A mg −1 Pt , which was ∼13 times higher than that of commercial Pt/C.
A facile approach to enhance the hydrogen evolution reaction of electrodeposited MoS2 in acidic solutions
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2NJ04547H
Abstract: Binder-free Ni modified-MoS 2 electrocatalysts with superior hydrogen evolution reaction (HER) catalytic performance were fabricated by a facile electrodeposition method.
Active site engineering by surface sulfurization for a highly efficient oxygen evolution reaction: A case study of Co3O4 electrocatalysts
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TA08211A
Abstract: Enhanced catalytic activity of Co 3 O 4 @CoS x through surface sulfurization.
Effect of Ni doping on the structure and properties of In2O3 nanocrystals prepared under magnetic field
Publisher: Elsevier BV
Date: 08-2014
Stabilizing the Unstable: Chromium Coating on NiMo Electrode for Enhanced Stability in Intermittent Water Electrolysis
Publisher: American Chemical Society (ACS)
Date: 29-08-2022
Abstract: Hydrogen production through water electrolysis is a promising method to utilize renewable energy in the context of urgent need to phase out fossil fuels. Nickel-molybdenum (NiMo) electrodes are among the best performing non-noble metal-based electrodes for hydrogen evolution reaction in alkaline media (alkaline HER). Albeit exhibiting stable performance in electrolysis at a constant power supply (i.e., constant electrolysis), NiMo electrodes suffer from performance degradation in electrolysis at an intermittent power supply (i.e., intermittent electrolysis), which is emblematic of electrolysis powered directly by renewable energy (such as wind and solar power sources). Here we reveal that NiMo electrodes were oxidized by dissolved oxygen during power interruption, leading to vanishing of metallic Ni active sites and loss of conductivity in MoO
Angstrom‐Confined Electrochemical Synthesis of Sub‐Unit‐Cell Non‐Van Der Waals 2D Metal Oxides
Publisher: Wiley
Date: 17-06-2023
Abstract: Bottom‐up electrochemical synthesis of atomically thin materials is desirable yet challenging, especially for non‐van der Waals (non‐vdW) materials. Thicknesses below a few nanometers have not been reported yet, posing the question how thin can non‐vdW materials be electrochemically synthesized. This is important as materials with (sub‐)unit‐cell thickness often show remarkably different properties compared to their bulk form or thin films of several nanometers thickness. Here, a straightforward electrochemical method utilizing the angstrom‐confinement of laminar reduced graphene oxide (rGO) nanochannels is introduced to obtain a centimeter‐scale network of atomically thin ( .3 Å) 2D‐transition metal oxides (2D‐TMO). The angstrom‐confinement provides a thickness limitation, forcing sub‐unit‐cell growth of 2D‐TMO with oxygen and metal vacancies. It is showcased that Cr 2 O 3 , a material without significant catalytic activity for the oxygen evolution reaction (OER) in bulk form, can be activated as a high‐performing catalyst if synthesized in the 2D sub‐unit‐cell form. This method displays the high activity of sub‐unit‐cell form while retaining the stability of bulk form, promising to yield unexplored fundamental science and applications. It is shown that while retaining the advantages of bottom‐up electrochemical synthesis, like simplicity, high yield, and mild conditions, the thickness of TMO can be limited to sub‐unit‐cell dimensions.
Tuning the crystal structure and magnetic properties of Fe doped In2O3 nanocrystals
Publisher: AIP Publishing
Date: 24-12-2007
DOI: 10.1063/1.2815661
Abstract: Fe doped In2O3 nanocrystals were synthesized by a coprecipitation method under external magnetic fields. X-ray diffraction data and high-resolution transmission electron microscopy analyses indicated the formation of single phase without any parasitic phases. The crystal structure of the nanocrystals is tuned by changing Fe concentrations and intensities of magnetic fields. Room temperature ferromagnetism in Fe doped In2O3 nanocrystals can be activated by suitable magnetic fields.
Highly Selective Metal‐Free Electrochemical Production of Hydrogen Peroxide on Functionalized Vertical Graphene Edges
Publisher: Wiley
Date: 05-11-2022
Abstract: Electrochemical generation of hydrogen peroxide (H 2 O 2 ) is an attractive alternative to the energy‐intensive anthraquinone oxidation process. Metal‐free carbon‐based materials such as graphene show great promise as efficient electrocatalysts in alkaline media. In particular, the graphene edges possess superior electrochemical properties than the basal plane. However, identification and enhancement of the catalytically active sites at the edges remain challenging. Furthermore, control of surface wettability to enhance gas diffusion and promote the performance in bulk electrolysis is largely unexplored. Here, a metal‐free edge‐rich vertical graphene catalyst is synthesized and exhibits a superior performance for H 2 O 2 production, with a high onset potential (0.8 V versus reversible hydrogen electrode (RHE) at 0.1 mA cm −2 ) and 100% Faradaic efficiency at various potentials. By tailoring the oxygen‐containing functional groups using various techniques of electrochemical oxidation, thermal annealing and oxygen plasma post‐treatment, the edge‐bound in‐plane ether‐type (COC) groups are revealed to account for the superior catalytic performance. To manipulate the surface wettability, a simple vacuum‐based method is developed to effectively induce material hydrophobicity by accelerating hydrocarbon adsorption. The increased hydrophobicity greatly enhances gas transfer without compromising the Faradaic efficiency, enabling a H 2 O 2 productivity of 1767 mmol g catalyst −1 h −1 at 0.4 V versus RHE.
Growth and self-assembly of BaTiO3 nanocubes for resistive switching memory cells
Publisher: Elsevier BV
Date: 06-2014
Thermal stability, dynamic mechanical analysis and nanoindentation behavior of FeSiB(Cu) amorphous alloys
Publisher: Elsevier BV
Date: 02-2015
A Flashforward Look into Solutions for Fruit and Vegetable Production
Publisher: MDPI AG
Date: 18-10-2022
Abstract: One of the most important challenges facing current and future generations is how climate change and continuous population growth adversely affect food security. To address this, the food system needs a complete transformation where more is produced in non-optimal and space-limited areas while reducing negative environmental impacts. Fruits and vegetables, essential for human health, are high-value-added crops, which are grown in both greenhouses and open field environments. Here, we review potential practices to reduce the impact of climate variation and ecosystem damages on fruit and vegetable crop yield, as well as highlight current bottlenecks for indoor and outdoor agrosystems. To obtain sustainability, high-tech greenhouses are increasingly important and biotechnological means are becoming instrumental in designing the crops of tomorrow. We discuss key traits that need to be studied to improve agrosystem sustainability and fruit yield.
Hydrothermal synthesis and optical properties of Pb2+ doped ZnO nanorods
Publisher: Elsevier BV
Date: 09-2006
Shape and Orientation Controlled Hydrothermal Synthesis of Silicide and Metal Dichalcogenide on a Silicon Substrate
Publisher: American Chemical Society (ACS)
Date: 31-03-2020
Lattice evolution and enhanced piezoelectric properties of hydrothermally synthesised 0.94(Bi0.5Na0.5)TiO3-0.06BaTiO(3) nanofibers
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7TC03812G
Abstract: In this work, a facile low-temperature hydrothermal method accompanied with a moderate annealing process is introduced to synthesis highly crystallized lead-free piezoelectric 0.94BNT–0.06BT nanofibers.
Electroluminescent Solar Cells Based on CsPbI 3 Perovskite Quantum Dots
Publisher: Wiley
Date: 27-10-2022
Abstract: All‐inorganic CsPbX 3 (X = Cl, Br, I, or mixed halides) perovskite quantum dots (QDs) exhibit tunable optical bandgaps and narrow emission peaks, which have received worldwide interest in the field of both photovoltaics (PVs) and light‐emitting diodes (LEDs). Herein, it is reported a discovery that CsPbI 3 perovskite QD solar cell can simultaneously deliver high PV performance and intense electroluminescence. In specific, the multifunctional CsPbI 3 QD film is fabricated through a simple yet efficient solid‐state‐ligand exchange process using a tailored organic ligand triphenyl phosphite (TPPI). The function of QD surface manipulation using TPPI here is proven to be twofold, balancing the carrier transport and effectively passivating the QD surface to produce conductive and emissive QD film. The CsPbI 3 perovskite QD solar cell delivers a ch ion efficiency of 15.21% with improved open circuit voltage and high fill factor. Concurrently functioning as a red LED, the CsPbI 3 perovskite QD solar cell outputs electric power to light conversion efficiency approaching 4%, a record value for QD electroluminescent PVs. The results here indicate that these versatile perovskite QDs may be a promising candidate for fabricating multifunctional optoelectronic devices.
Resistive switching behaviors in electrodeposited BaTiOF4 nanorod layers
Publisher: Elsevier BV
Date: 03-2013
Crystallographic Orientation Dependence on Electrical Properties of (Bi Na TiO
Publisher: Wiley
Date: 13-08-2013
DOI: 10.1111/JACE.12524
Regenerable aerogel‐based thermogalvanic cells for efficient low‐grade heat harvesting from solar radiation and interfacial solar evaporation systems
Publisher: Wiley
Date: 07-11-2023
DOI: 10.1002/EOM2.12302
Abstract: Direct conversion of low‐grade heat into electricity by thermal electrochemical cells is a promising strategy for energy generation. For stable heat‐to‐electricity conversion, maintaining a low‐grade heat induced temperature difference between the cell electrodes is essential. Here, a thermogalvanic cell consisting of a cellulose fiber‐based porous aerogel, a liquid electrolyte, a reduced graphene oxide light absorber, and carbon nanotube‐based electrodes is designed for low‐grade thermal energy harvesting and conversion. The low thermal conductivity of the porous cellulose aerogel enables limited heat transfer from the hot side to the cold side, and thermal energy management effectively reduces heat loss from the hot side to the environment. Thus, a sustainable temperature difference between the electrodes is maintained and a corresponding maximum power output of 6.94 mW m −2 is achieved under natural solar irradiation. The obtained thermal electrochemical cells are also integrated into an enclosed interfacial solar evaporation device to harvest the latent heat released from vapor condensation for electricity generation. In addition, the thermal electrochemical cells can be regenerated after 18 months of storage and show no performance degradation. This design thus offers a novel alternative strategy for practical low‐grade heat harvesting. image
Tuneable resistive switching characteristics of In2O3 nanorods array via Co doping
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3RA41276H
Recent progress of surface coating on cathode materials for high-performance lithium-ion batteries
Publisher: Elsevier BV
Date: 04-2020
Formation and Photocatalytic Application of ZnO Nanotubes Using Aqueous Solution
Publisher: American Chemical Society (ACS)
Date: 09-11-2009
DOI: 10.1021/LA902866A
Abstract: Vertically aligned ZnO nanotubes were prepared by etching ZnO rod arrays in aqueous solution, which were previously developed by chemical bath deposition method. The morphological, structural, photoluminescence, as well as photocatalytic properties of the ZnO nanotubes were examined with respect to the pH values of chemical bath solution. The morphology of the products was found to be sensitive to the pH values and chemical bath temperatures. The nanotubes synthesized at a low pH value (5.82) exhibited a strong UV emission and a weak defect-related visible emission. The highest photocatalytic efficiency was also observed at pH = 5.82. The possible mechanism for the difference of photocatalytic efficiency was discussed.
Optimization of the selenization pressure enabling efficient Cu2ZnSn(S,Se)4 solar cells
Publisher: Wiley
Date: 16-11-2022
Abstract: In spite of the merits such as Earth abundance and high performance, Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells suffer from unfavorable Sn Zn antisite defects and complexes, which act as nonradiative recombination centers and deteriorate the open‐circuit voltage ( V OC ). Therefore, the management of Sn composition is the prerequisite for achieving high‐efficiency CZTSSe photovoltaic devices. At present, the Sn‐related composition and defect modifications at different selenization pressures remain unclear, which restrain the development of efficient kesterite solar cells. Herein, a facile yet effective strategy to accurately adjust the Sn content in CZTSSe films by simply optimizing the selenization pressure is demonstrated. Compared with the widely used atmospheric pressure, it is unveiled that the appropriate negative pressure (0.7 atm) can tailor the optimal Sn content in the absorber layer, influencing both the Sn‐related defects and the microstructures. In contrast, a lower (0.4 atm) and a higher (1.3 atm) selenization pressure results in undesirable deep Cu Sn defects and a Sn(S,Se) 2 secondary phase, respectively. A ch ion device fabricated at this optimal selenization pressure (0.7 atm) exhibits a power conversion efficiency of 11.32% with a V OC of 0.496 V. This study paves the path toward highly efficient kesterite solar cells by tailoring the composition‐dependent defects.
Unique structure of ZnO films deposited by chemical bath deposition
Publisher: Wiley
Date: 11-2009
Enhanced electrocatalytic oxygen evolution by manipulation of electron transfer through cobalt-phosphorous bridging
Publisher: Elsevier BV
Date: 10-2020
Synthesis and Self-assembly of Oxide Nanocubes in Organic Solution
Publisher: Bentham Science Publishers Ltd.
Date: 07-2013
Improved electrochemical performance of high-nickel cathode material with electronic conductor RuO2 as the protecting layer for lithium-ion batteries
Publisher: Elsevier BV
Date: 11-2020
Assessing natural organic matter treatability using high performance size exclusion chromatography
Publisher: American Chemical Society (ACS)
Date: 02-08-2008
DOI: 10.1021/ES800794R
Abstract: This paper reports the use of high performance size exclusion chromatography (HPSEC) as a tool to assess NOM removal by coagulation. Quantitative information such as percentage removal can be determined after "peak-fitting" the HPSEC molecular weight profile of the source water. A peak-fitting approach was developed based on the molecular weight profile of dissolved organic matter from surface water. A sequential jar testing procedure with five treatment steps was used to characterize organics and to confirm that several NOM components were recalcitrant to coagulation with alum. Despite differences found in both the concentration and character of NOM in three surface waters studied, the final concentrations and characteristics (e.g., molecular weight profile) were very similar after five treatment stages. The molecular weight profiles of the recalcitrant organics were subsequently used to build a peak-fitting technique for NOM removal. The approach was validated by further jar test results of several other water sources, such as ground and river waters, including one found to be very difficult to treat in terms of NOM removal by alum treatment. Predictions of removable and nonremovable organic fractions by coagulation using this peak fitting technique were found to be within 10% of actual values.
Molecular dynamics simulation of cyclic indentation in Fe-based amorphous alloy
Publisher: Elsevier BV
Date: 02-2018
Mimicking synaptic plasticity and learning behaviours in solution processed SnO2 memristor
Publisher: Elsevier BV
Date: 08-2018
BCN nanostructures conjugated nanoporous carbon with oxygenated surface and high specific surface area for enhanced CO2 capture and supercapacitance
Publisher: Elsevier BV
Date: 03-2023
Quantum dot passivation of halide perovskite films with reduced defects, suppressed phase segregation, and enhanced stability
Publisher: Wiley
Date: 29-11-2022
Abstract: Structural defects are ubiquitous for polycrystalline perovskite films, compromising device performance and stability. Herein, a universal method is developed to overcome this issue by incorporating halide perovskite quantum dots (QDs) into perovskite polycrystalline films. CsPbBr 3 QDs are deposited on four types of halide perovskite films (CsPbBr 3 , CsPbIBr 2 , CsPbBrI 2 , and MAPbI 3 ) and the interactions are triggered by annealing. The ions in the CsPbBr 3 QDs are released into the thin films to passivate defects, and concurrently the hydrophobic ligands of QDs self‐assemble on the film surfaces and grain boundaries to reduce the defect density and enhance the film stability. For all QD‐treated films, PL emission intensity and carrier lifetime are significantly improved, and surface morphology and composition uniformity are also optimized. Furthermore, after the QD treatment, light‐induced phase segregation and degradation in mixed‐halide perovskite films are suppressed, and the efficiency of mixed‐halide CsPbIBr 2 solar cells is remarkably improved to over 11% from 8.7%. Overall, this work provides a general approach to achieving high‐quality halide perovskite films with suppressed phase segregation, reduced defects, and enhanced stability for optoelectronic applications.
Room‐temperature synthesis and characterization of porous CeO2 thin films
Publisher: Wiley
Date: 20-09-2011
Designing MXene-Wrapped AgCl@Carbon core shell cathode for robust quasi-solid-state Ag-Zn battery with ultralong cycle life
Publisher: Elsevier BV
Date: 06-2023
Recent Progress in Lithium Lanthanum Titanate Electrolyte towards All Solid-State Lithium Ion Secondary Battery
Publisher: Informa UK Limited
Date: 19-09-2018
Modulating Pt-O-Pt atomic clusters with isolated cobalt atoms for enhanced hydrogen evolution catalysis
Publisher: Springer Science and Business Media LLC
Date: 04-05-2022
DOI: 10.1038/S41467-022-30155-4
Abstract: Platinum is the most efficient catalyst for hydrogen evolution reaction in acidic conditions, but its widespread use has been impeded by scarcity and high cost. Herein, Pt atomic clusters (Pt ACs) containing Pt-O-Pt units were prepared using Co/N co-doped carbon (CoNC) as support. Pt ACs are anchored to single Co atoms on CoNC by forming strong interactions. Pt-ACs/CoNC exhibits only 24 mV overpotential at 10 mA cm −2 and a high mass activity of 28.6 A mg −1 at 50 mV, which is more than 6 times higher than commercial Pt/C with any Pt loadings. Spectroscopic measurements and computational modeling reveal the enhanced hydrogen generation activity attributes to the charge redistribution between Pt and O atoms in Pt-O-Pt units, making Pt atoms the main active sites and O linkers the assistants, thus optimizing the proton adsorption and hydrogen desorption. This work opens an avenue to fabricate noble-metal-based ACs stabilized by single-atom catalysts with desired properties for electrocatalysis.
Enhancement of high temperature thermoelectric performance in Bi, Fe co-doped layered oxide-based material Ca3 Co4 O 9+δ
Publisher: Elsevier BV
Date: 12-2014
Design and synthesis of CeO2 nanowire/MnO2 nanosheet heterogeneous structure for enhanced catalytic properties
Publisher: Elsevier BV
Date: 06-2017
Hierarchically Constructed Silver Nanowire@Nickel–Iron Layered Double Hydroxide Nanostructures for Electrocatalytic Water Splitting
Publisher: American Chemical Society (ACS)
Date: 23-12-2019
The surface double-coupling on single-crystal LiNi0.8Co0.1Mn0.1O2 for inhibiting the formation of intragranular cracks and oxygen vacancies
Publisher: Elsevier BV
Date: 11-2022
Ferromagnetic ordering in Mn-doped ZnO nanoparticles
Publisher: Springer Science and Business Media LLC
Date: 22-11-2014
Abstract: Zn 1 - x Mn x O nanoparticles have been synthesized by hydrothermal technique. The doping concentration of Mn can reach up to 9 at% without precipitation or secondary phase, confirmed by electron spin resonance (ESR) and synchrotron X-ray diffraction (XRD). Room-temperature ferromagnetism is observed in the as-prepared nanoparticles. However, the room-temperature ferromagnetism disappears after post-annealing in either argon or air atmosphere, indicating the importance of post-treatment for nanostructured magnetic semiconductors.
Borophene Embedded Cellulose Paper for Enhanced Photothermal Water Evaporation and Prompt Bacterial Killing
Publisher: Wiley
Date: 25-01-2023
Abstract: Solar‐driven photothermal water evaporation is considered an elegant and sustainable technology for freshwater production. The existing systems, however, often suffer from poor stability and biofouling issues, which severely h er their prospects in practical applications. Conventionally, photothermal materials are deposited on the membrane supports via vacuum‐assisted filtration or dip‐coating methods. Nevertheless, the weak inherent material‐membrane interactions frequently lead to poor durability, and the photothermal material layer can be easily peeled off from the hosting substrates or partially dissolved when immersed in water. In the present article, the discovery of the incorporation of borophene into cellulose nanofibers (CNF), enabling excellent environmental stability with a high light‐to‐heat conversion efficiency of 91.5% and water evaporation rate of 1.45 kg m −2 h −1 under simulated sunlight is reported. It is also demonstrated that borophene papers can be employed as an excellent active photothermal material for eliminating almost 100% of both gram‐positive and gram‐negative bacteria within 20 min under three sun irradiations. The result opens a new direction for the design of borophene‐based papers with unique photothermal properties which can be used for the effective treatment of a wide range of wastewaters.
Morphology control and large piezoresponse of hydrothermally synthesized lead-free piezoelectric (Bi0.5Na0.5)TiO3 nanofibres
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7RA01293D
Abstract: (Bi 0.5 Na 0.5 )TiO 3 nanofibers were synthesized hydrothermally, nanostructures were investigated and piezoelectric properties of single nanofibers were measured.
A high-voltage all-solid-state lithium-ion battery with Li–Mn–Ni–O and silicon thin-film electrodes
Publisher: Informa UK Limited
Date: 30-04-2015
Bi-stable resistive switching characteristics in Ti-doped ZnO thin films
Publisher: Springer Science and Business Media LLC
Date: 04-04-2013
Abstract: Ti-doped ZnO (ZnO/Ti) thin films were grown on indium tin oxide substrates by a facile electrodeposition route. The morphology, crystal structure and resistive switching properties were examined, respectively. The morphology reveals that grains are composed of small crystals. The (002) preferential growth along c -axis of ZnO/Ti could be observed from structural analysis. The XPS study shows the presence of oxygen vacancies in the prepared films. Typical bipolar and reversible resistance switching effects were observed. High R OFF / R ON ratios (approximately 14) and low operation voltages within 100 switching cycles are obtained. The filament theory and the interface effect are suggested to be responsible for the resistive switching phenomenon.
Direct growth of TiO2 nanotubes on transparent substrates and their resistive switching characteristics
Publisher: IOP Publishing
Date: 17-08-2012
DOI: 10.1088/0022-3727/45/35/355306
Abstract: In this work, TiO 2 nanotubes were directly grown by one-step electrochemical deposition process, in the absence of any templates or metal Ti substrates. The Au/TiO 2 nanotube/fluorine-doped tin oxide glass capacitor exhibits stable bipolar resistive switching behaviour. The resistive switching behaviour may be related to the oxygen vacancies, giving rise to the formation of straight and extensible conducting filaments along the wall of each vertically aligned TiO 2 nanotube. Superior stability in resistive switching characteristics was also observed, indicating that TiO 2 nanotubes are one of the potential materials for next-generation nonvolatile memory applications.
A Facile and Template-Free One-Pot Synthesis of Mn3O4 Nanostructures as Electrochemical Supercapacitors
Publisher: Springer Science and Business Media LLC
Date: 13-11-2015
Two-Dimensional Nanomaterials for Moisture-Electric Generators: A Review
Publisher: American Chemical Society (ACS)
Date: 11-07-2022
Tuning the surface oxygen concentration of {111} surrounded ceria nanocrystals for enhanced photocatalytic activities
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5NR06588G
Abstract: For oxide semiconductors, the morphology, particle size and oxygen vacancies are usually considered as key influential parameters for photocatalytic degradation of organic pollutants/dyes. It is widely accepted that cation doping not only modifies their phase and microstructures but also introduces variations in oxygen vacancy concentration. Herein, we report the fabrication of sub-10 nm sized pure and indium doped CeO2 nanocrystals (NCs) via a facile, green hydrothermal method for the investigation of photocatalytic activities. X-ray diffraction and transmission electron microscopy were employed to examine the crystal phase and morphology of the as-prepared nanocrystals. Raman and X-ray photoelectron spectroscopy techniques were implemented to investigate the presence and variations in oxygen vacancy concentration in un-doped and indium doped CeO2 nanocrystals. The photocatalytic activity results revealed that 10 at% doping is the optimal indium doping level to demonstrate superior dye removal efficiency (∼40%) over un-doped and doped CeO2 NCs. Moreover, the 10% In-doped CeO2 nanocrystals expressed excellent cycling stability and superior photocatalytic performance toward other dye pollutants. Finally, on the basis of our findings, a possible photocatalytic mechanism in which indium doping can generate more surface oxygen vacancies in the ceria lattice which delay the electron-hole recombination rates, thus increasing the lifetime of electron-hole separation for enhanced photocatalytic performances was proposed.
Enhancing the Electrochemical Properties of Nickel-Rich Cathode by Surface Coating with Defect-Rich Strontium Titanate
Publisher: American Chemical Society (ACS)
Date: 06-06-2023
Enhancing the Efficiency and Stability of PbS Quantum Dot Solar Cells through Engineering an Ultrathin NiO Nanocrystalline Interlayer
Publisher: American Chemical Society (ACS)
Date: 15-09-2020
High Areal Capacity and Long Cycle Life Flexible Mild Quasi‐Solid‐State Ag–Zn Battery with Dendrite‐Free Anode
Publisher: Wiley
Date: 08-03-2009
DOI: 10.1002/EEM2.12493
Abstract: Silver‐zinc (Ag–Zn) batteries are a promising battery system for flexible electronics owing to their high safety, high energy density, and stable output voltage. However, poor cycling performance, low areal capacity, and inferior flexibility limit the practical application of Ag–Zn batteries. Herein, we develop a flexible quasi‐solid‐state Ag–Zn battery system with superior performance by using mild electrolyte and binder‐free electrodes. Copper foam current collector is introduced to impede the growth of Zn dendrite, and the structure of Ag cathode is engineered by electrodeposition and chloridization process to improve the areal capacity. This novel battery demonstrates a remarkable cycle retention of 90% for 200 cycles at 3 mA cm −2 . More importantly, this binder‐free battery can afford a high capacity of 3.5 mAh cm −2 at 3 mA cm −2 , an outstanding power density of 2.42 mW cm −2 , and a maximum energy density of 3.4 mWh cm −2 . An energy management circuit is adopted to boost the output voltage of a single battery, which can power electronic ink display and Bluetooth temperature and humidity sensor. The developed battery can even operate under the extreme conditions, such as being bent and sealed in solid ice. This work offers a path for designing electrodes and electrolyte toward high‐performance flexible Ag–Zn batteries.
Synthesis and dielectric properties of printable strontium titanate/polyvinylpyrrolidone nanocomposites
Publisher: IOP Publishing
Date: 02-08-2019
Recent developments of hybrid piezo–triboelectric nanogenerators for flexible sensors and energy harvesters
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1NA00501D
Abstract: Hybrid piezo–triboelectric nanogenerators constitute a new class of self-powered systems that exploit the synergy of piezoelectric and triboelectric mechanisms to address the energy and power needs for portable and wearable electronic devices.
Evidence of Filamentary Switching in Oxide-based Memory Devices via Weak Programming and Retention Failure Analysis
Publisher: Springer Science and Business Media LLC
Date: 09-2015
DOI: 10.1038/SREP13599
Abstract: Further progress in high-performance microelectronic devices relies on the development of novel materials and device architectures. However, the components and designs that are currently in use have reached their physical limits. Intensive research efforts, ranging from device fabrication to performance evaluation, are required to surmount these limitations. In this paper, we demonstrate that the superior bipolar resistive switching characteristics of a CeO 2 :Gd-based memory device can be manipulated by means of UV radiation, serving as a new degree of freedom. Furthermore, the metal oxide-based (CeO 2 :Gd) memory device was found to possess electrical and neuromorphic multifunctionalities. To investigate the underlying switching mechanism of the device, its plasticity behaviour was studied by imposing weak programming conditions. In addition, a short-term to long-term memory transition analogous to the forgetting process in the human brain, which is regarded as a key biological synaptic function for information processing and data storage, was realized. Based on a careful examination of the device’s retention behaviour at elevated temperatures, the filamentary nature of switching in such devices can be understood from a new perspective.
Enhancing cyclic and in-air stability of Ni-Rich cathodes through perovskite oxide surface coating
Publisher: Elsevier BV
Date: 12-2022
DOI: 10.1016/J.JCIS.2022.08.061
Abstract: Ni-rich layered oxides, such as LiNi
Improved super-capacitive performance of carbon foam supported CeOx nanoflowers by selective doping and UV irradiation
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4RA03024A
Abstract: In this work, we developed a facile electrochemical deposition approach to prepare Gd-doped CeO x nanoflowers on porous carbon foam with improved supercapacitor characteristics by UV irradiation.
Recent Development of Moisture‐Enabled‐Electric Nanogenerators
Publisher: Wiley
Date: 22-09-2022
Abstract: Power generation by converting energy from the ambient environment has been considered a promising strategy for developing decentralized electrification systems to complement the electricity supply for daily use. Wet gases, such as water evaporation or moisture in the atmosphere, can be utilized as a tremendous source of electricity by emerging power generation devices, that is, moisture‐enabled‐electric nanogenerators (MEENGs). As a promising technology, MEENGs provided a novel manner to generate electricity by harvesting energy from moisture, originating from the interactions between water molecules and hydrophilic functional groups. Though the remarkable progress of MEENGs has been achieved, a systematic review in this specific area is urgently needed to summarize previous works and provide sharp points to further develop low‐cost and high‐performing MEENGs through overcoming current limitations. Herein, the working mechanisms of MEENGs reported so far are comprehensively compared. Subsequently, a systematic summary of the materials selection and fabrication methods for currently reported MEENG construction is presented. Then, the improvement strategies and development directions of MEENG are provided. At last, the demonstrations of the applications assembled with MEENGs are extracted. This work aims to pave the way for the further MEENGs to break through the performance limitations and promote the popularization of future micron electronic self‐powered equipment.
Enhanced electrochemical performance of LiNi 0.8 Co 0.1 Mn 0.1 O 2 with lithium-reactive Li 3 VO 4 coating
Publisher: Elsevier BV
Date: 06-2017
Sustainable practices: Solar hydrogen fuel and education program on sustainable energy systems
Publisher: Elsevier BV
Date: 03-0066
The cationic interstitials induced resistive switching: a case study on Mn-doped SnO2
Publisher: Informa UK Limited
Date: 05-01-2023
Advanced three-dimensional hierarchical Pr6O11@Ni-Co oxides-based core-shell electrodes for supercapacitance application
Publisher: Elsevier BV
Date: 04-2019
Wearable and long-range MXene 5G antenna energy harvester
Publisher: AIP Publishing
Date: 09-2023
DOI: 10.1063/5.0146976
Ab initio description of oxygen vacancies in epitaxially strained $$\hbox {SrTiO}_{{3}}$$ at finite temperatures
Publisher: Springer Science and Business Media LLC
Date: 06-2021
DOI: 10.1038/S41598-021-91018-4
Abstract: Epitaxially grown $$\\hbox {SrTiO}_{{3}}$$ SrTiO 3 (STO) thin films are material enablers for a number of critical energy-conversion and information-storage technologies like electrochemical electrode coatings, solid oxide fuel cells and random access memories. Oxygen vacancies ( $${\\mathrm{V}_{{\\mathrm{O}}}}$$ V O ), on the other hand, are key defects to understand and tailor many of the unique functionalities realized in oxide perovskite thin films. Here, we present a comprehensive and technically sound ab initio description of $${\\mathrm{V}_{{\\mathrm{O}}}}$$ V O in epitaxially strained (001) STO thin films. The novelty of our first-principles study lies in the incorporation of lattice thermal excitations on the formation energy and diffusion properties of $${\\mathrm{V}_{{\\mathrm{O}}}}$$ V O over wide epitaxial strain conditions ( $$-4 \\le \\eta \\le +4$$ - 4 ≤ η ≤ + 4 %). We found that thermal lattice excitations are necessary to obtain a satisfactory agreement between first-principles calculations and the available experimental data for the formation energy of $${\\mathrm{V}_{{\\mathrm{O}}}}$$ V O . Furthermore, it is shown that thermal lattice excitations noticeably affect the energy barriers for oxygen ion diffusion, which strongly depend on $$\\eta $$ η and are significantly reduced (increased) under tensile (compressive) strain. The present work demonstrates that for a realistic theoretical description of oxygen vacancies in STO thin films is necessary to consider lattice thermal excitations, thus going beyond standard zero-temperature ab initio approaches.
Abnormal phase transition and magnetic properties in Cu, Fe co-doped In2O3 nanocrystals
Publisher: AIP Publishing
Date: 05-05-2008
DOI: 10.1063/1.2920818
Abstract: Fe, Cu co-doped In2O3 nanocrystals were synthesized by a coprecipitation method. Phase analyses revealed that Fe ions have high solubility (up to 15.4at.%) in the In2O3 matrix, while the Cu ions strongly restrain In2O3 phase transition from cubic to hexagonal. Raman spectroscopy shows that by adding Cu ions, the defect concentration increases. The s les show no evidence of ferromagnetism by additional Cu doping, indicating that Cu content might be a key point to realize room temperature ferromagnetism in Fe doped In2O3.
Stochastic memristive nature in Co-doped CeO2 nanorod arrays
Publisher: AIP Publishing
Date: 16-12-2013
DOI: 10.1063/1.4851935
Abstract: In this Letter, bipolar resistive switching characteristics of electrochemically deposited pure and Cobalt doped CeO2 nanorods architectures were reported. A conducting filament based model to address resistive switching process in these devices was proposed. Furthermore, the randomness in in idual switching events and the prediction of switching probabilities were studied by imposing weak programming conditions. The present study offers insights into scrutinize the inherent stochastic nature in resistive switching characteristics within these devices rather than stressfully achieve high switching probabilities using excess voltage or time.
Engineering cationic defects in transparent tin oxide superlattices
Publisher: Elsevier BV
Date: 10-2018
Interface-Engineered Resistive Switching: CeO2 Nanocubes as High-Performance Memory Cells
Publisher: American Chemical Society (ACS)
Date: 26-09-2013
DOI: 10.1021/AM403243G
Abstract: We reported a novel and facile approach to fabricate self-assembled CeO2 nanocube-based resistive-switching memory device. The device was found to exhibit excellent bipolar resistive-switching characteristics with a high resistance state (HRS/OFF) to low resistance state (LRS/ON) ratio of 10(4), better uniformity, and stability up to 480 K. The presence of oxygen vacancies and their role was discussed to explain the resistive-switching phenomenon in the fabricated devices. Further, the effect of the film thickness on carrier concentrations and estimated electric field strength with the switching (OFF/ON) ratio were also discussed.
Bipolar resistive switching in p-type Co3O4 nanosheets prepared by electrochemical deposition
Publisher: Springer Science and Business Media LLC
Date: 19-01-2013
Abstract: Metal oxide nanosheets have potential applications in novel nanoelectronics as nanocrystal building blocks. In this work, the devices with a structure of Au -type Co 3 O 4 nanosheets/indium tin oxide/glass having bipolar resistive switching characteristics were successfully fabricated. The experimental results demonstrate that the device have stable high/low resistance ratio that is greater than 25, endurance performance more than 200 cycles, and data retention more than 10,000 s. Such a superior performance of the as-fabricated device could be explained by the bulk film and Co 3 O 4 /indium tin oxide glass substrate interface effect.
High‐Performance Flexible Graphene Oxide‐Based Moisture‐Enabled Nanogenerator via Multilayer Heterojunction Engineering and Power Management System
Publisher: Wiley
Date: 02-08-2023
Abstract: Recently, there has been a surge of interest in nanogenerators within the scientific community because their immense potential for extracting energy from the surrounding environment. A promising approach involves utilizing ambient moisture as an energy source for portable devices. In this study, moisture‐enabled nanogenerators (MENGs) are devised by integrating heterojunctions of graphene oxide (GO) and reduced graphene oxide (rGO). Benefiting from the unique structure, a larger ion concentration gradient is achieved as well as a lower resistance, which leads to enhanced electricity generation. The resulting MENG generates a desirable open‐circuit voltage of 0.76 V and a short‐circuit current density of 73 µA cm −2 with a maximum power density of 15.8 µW cm −2 . Notably, the designed device exhibits a high voltage retention of more than 90% after 3000 bending cycles, suggesting a high potential for flexible applications. Moreover, a large‐scale integrated MENG array is developed by incorporating flexible printed circuit technology and connecting it to a power management system. This integrated system can provide le energy to operate an electronic ink display and drive a heart rate sensor for health monitoring. The outcomes of this research present a novel framework for advancing next‐generation self‐powered flexible devices, thereby demonstrating significant promise for future wearable electronics.
Size‐Dependent Penetration of Nanoparticles in Tumor Spheroids: A Multidimensional and Quantitative Study of Transcellular and Paracellular Pathways
Publisher: Wiley
Date: 11-10-2023
Impact of deposition parameters on the performance of ceria based resistive switching memories
Publisher: IOP Publishing
Date: 07-2016
Synaptic plasticity and learning behavior in transparent tungsten oxide-based memristors
Publisher: Elsevier BV
Date: 09-2017
Thermoelectric properties of sol-gel derived lanthanum titanate ceramics
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4RA13945C
Abstract: In this work, the thermoelectric properties of lanthanum titanate ceramics with different La/Ti ratios were reported.
Recent Developments in Oxide-Based Ionic Conductors: Bulk Materials, Nanoionics, and Their Memory Applications
Publisher: Informa UK Limited
Date: 20-12-2018
Electrochemistry and redox characterization of rock-salt-type lithium metal oxides Li1+z/3Ni1/2-z/2Ti1/2+z/6O2 for Li-ion batteries
Publisher: Elsevier BV
Date: 2019
Atomically Dispersed Cu Catalysts on Sulfide-Derived Defective Ag Nanowires for Electrochemical CO2 Reduction
Publisher: American Chemical Society (ACS)
Date: 02-02-2023
Oxide-based cathode materials for rechargeable zinc ion batteries: Progresses and challenges
Publisher: Elsevier BV
Date: 06-2021
Transparent and flexible write-once-read-many (WORM) memory device based on egg albumen
Publisher: IOP Publishing
Date: 17-07-2017
In2O3–SnO2 nano-toasts and nanorods: Precipitation preparation, formation mechanism, and gas sensitive properties
Publisher: Elsevier BV
Date: 02-04-2009
Solution‐Based, High‐Yield Synthesis of Cobalt‐Doped Zinc Oxide Nanorods
Publisher: Wiley
Date: 07-2007
Tuning the Electronic, Ion Transport, and Stability Properties of Li-rich Manganese-based Oxide Materials with Oxide Perovskite Coatings: A First-Principles Computational Study.
Publisher: American Chemical Society (ACS)
Date: 05-08-2022
Abstract: Lithium-rich manganese-based oxides (LRMO) are regarded as promising cathode materials for powering electric applications due to their high capacity (250 mAh g
Design and tailoring of carbon-Al2O3 double coated nickel-based cation-disordered cathodes towards high-performance Li-ion batteries
Publisher: Elsevier BV
Date: 06-2022
Preparation of single-crystalline ZnO films on ZnO-buffered a-plane sapphire by chemical bath deposition
Publisher: No publisher found
Date: 2009
Corrigendum to “Bridging NiCo layered double hydroxides and Ni3S2 for bifunctional electrocatalysts: The role of vertical graphene” [Chem. Eng. J. 415 (2021) 129048](S1385894721006392)(10.1016/j.cej.2021.129048)
Publisher: Elsevier BV
Date: 08-2021
Tailoring the multi-functionalities of one-dimensional ceria nanostructures via oxygen vacancy modulation
Publisher: Elsevier BV
Date: 10-2017
DOI: 10.1016/J.JCIS.2017.05.057
Abstract: Lattice defects, for ex le oxygen vacancies in cerium oxide (CeO
Surface Functionalities of Graphene Oxide with Varying Flake Size
Publisher: American Chemical Society (ACS)
Date: 09-05-2022
High-performance hierarchical MnO2/CNT electrode for multifunctional supercapacitors
Publisher: Elsevier BV
Date: 10-2021
Shape-Controlled Growth of In(OH)3/In2O3 Nanostructures by Electrodeposition
Publisher: American Chemical Society (ACS)
Date: 23-08-2010
DOI: 10.1021/LA102255K
Abstract: In(OH)(3) nanostructures with controllable shapes were successfully synthesized using indium nitrate as an indium source by one-step electrodeposition process. The influences of the reaction temperature, time, indium nitrate concentration, and the applied potential on the morphology of the obtained products were discussed in detail. The results revealed that the growth behavior of In(OH)(3) was mainly determined by the indium nitrate concentration and applied potential, and well-defined ellipsoids, cubes, and rods could be prepared under suitable conditions. Their possible growth mechanisms as well as photocatalytic applications were addressed. Furthermore, In(2)O(3) nanostructures were obtained from In(OH)(3) upon heating, while size and morphology can be maintained during this process.
Tunable resistance switching in solution processed chromium-doped strontium titanate nanoparticles films
Publisher: Elsevier BV
Date: 05-2017
DOI: 10.1016/J.JCIS.2017.01.095
Abstract: In this work, resistance switching behaviours in solution processed chromium (Cr)-doped strontium titanate (SrTiO
Flexible and efficient perovskite quantum dot solar cells via hybrid interfacial architecture
Publisher: Springer Science and Business Media LLC
Date: 20-01-2021
DOI: 10.1038/S41467-020-20749-1
Abstract: All-inorganic CsPbI 3 perovskite quantum dots have received substantial research interest for photovoltaic applications because of higher efficiency compared to solar cells using other quantum dots materials and the various exciting properties that perovskites have to offer. These quantum dot devices also exhibit good mechanical stability amongst various thin-film photovoltaic technologies. We demonstrate higher mechanical endurance of quantum dot films compared to bulk thin film and highlight the importance of further research on high-performance and flexible optoelectronic devices using nanoscale grains as an advantage. Specifically, we develop a hybrid interfacial architecture consisting of CsPbI 3 quantum dot/PCBM heterojunction, enabling an energy cascade for efficient charge transfer and mechanical adhesion. The ch ion CsPbI 3 quantum dot solar cell has an efficiency of 15.1% (stabilized power output of 14.61%), which is among the highest report to date. Building on this strategy, we further demonstrate a highest efficiency of 12.3% in flexible quantum dot photovoltaics.
Vertical graphene array for efficient electrocatalytic reduction of oxygen to hydrogen peroxide
Publisher: Elsevier BV
Date: 06-2022
A facile approach to tailor electrocatalytic properties of MnO2 through tuning phase transition, surface morphology and band structure
Publisher: Elsevier BV
Date: 06-2022
Interfacial Redox Reactions Associated Ionic Transport in Oxide-Based Memories
Publisher: American Chemical Society (ACS)
Date: 21-12-2016
Abstract: As an alternative to transistor-based flash memories, redox reactions mediated resistive switches are considered as the most promising next-generation nonvolatile memories that combine the advantages of a simple metal/solid electrolyte (insulator)/metal structure, high scalability, low power consumption, and fast processing. For cation-based memories, the unavailability of in-built mobile cations in many solid electrolytes/insulators (e.g., Ta
Hydrazine Hydrate Intercalated 1T-Dominant MoS2 with Superior Ambient Stability for Highly Efficient Electrocatalytic Applications
Publisher: American Chemical Society (ACS)
Date: 04-2022
Abstract: Metallic 1T-phase MoS
Electrochemical performance of hydrothermally synthesized rGO based electrodes
Publisher: Elsevier BV
Date: 09-2019
Influence of lattice dynamics on lithium-ion conductivity: A first-principles study
Publisher: American Physical Society (APS)
Date: 28-03-2019
Performance degradation and mitigation strategies of silver nanowire networks: a review
Publisher: Informa UK Limited
Date: 13-07-2022
Synergetic modulation of the electronic structure and hydrophilicity of nickel–iron hydroxide for efficient oxygen evolution by UV/ozone treatment
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0TA03470C
Abstract: Enhanced OER performance of Ni(Fe) hydroxide through UV/ozone treatment.
Bipolar resistive switching characteristics in LaTiO3 nanosheets
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4RA01626B
Electrodeposition of Mesoporous Co3O4Nanosheets on Carbon Foam for High Performance Supercapacitors
Publisher: Hindawi Limited
Date: 2014
DOI: 10.1155/2014/902730
Abstract: Metal oxide nanosheets have promising potential applications in novel energy storage devices. In this work, Co 3 O 4 nanosheets/carbon foam with excellent supercapacitor characteristics was successfully fabricated, without using metal substrates. The experimental results demonstrate that the electrochemical tests showed that the as-prepared Co 3 O 4 nanosheets exhibited an ideal capacitive behavior with a maximum specific capacitance of 106 F/g in 1 M NaOH solution at a scan rate of 0.1 V s −1 .
Facile Patterning of Silver Nanowires with Controlled Polarities via Inkjet-Assisted Manipulation of Interface Adhesion
Publisher: American Chemical Society (ACS)
Date: 09-07-2020
Cathode material LiNi0.8Co0.1Mn0.1O2/LaPO4 with high electrochemical performance for lithium-ion batteries
Publisher: Elsevier BV
Date: 10-2018
Structural, optical, and magnetic properties of Fe-doped In2O3 nanocubes
Publisher: Springer Science and Business Media LLC
Date: 10-2008
Abstract: Fe-doped In 2 O 3 nanocubes were synthesized by a solvothermal method. The lattice constant a decreases linearly as Fe doping concentration increases, and Raman scattering measurement proves the incorporation of Fe ions into the In 2 O 3 crystal lattice. Mössbauer spectra show the presence of mixed valence of Fe ions instead of Fe 3 O 4 , while the s le is superparamagnetic. The products with an average diameter of 80 nm have a single-crystalline phase and appear as a square shape. Magnetic measurements confirm the superparamagnetic properties of the nanocubes, and electron paramagnetic resonance studies indicate Fe ions occupy different sites in the In 2 O 3 matrix.
Indigo: A Natural Molecular Passivator for Efficient Perovskite Solar Cells
Publisher: Wiley
Date: 22-04-2022
Abstract: Organic–inorganic hybrid lead halide perovskite solar cells have made unprecedented progress in improving photovoltaic efficiency during the past decade, while still facing critical stability challenges. Herein, the natural organic dye Indigo is explored for the first time to be an efficient molecular passivator that assists in the preparation of high‐quality hybrid perovskite film with reduced defects and enhanced stability. The Indigo molecule with both carbonyl and amino groups can provide bifunctional chemical passivation for defects. In‐depth theoretical and experimental studies show that the Indigo molecules firmly binds to the perovskite surfaces, enhancing the crystallization of perovskite films with improved morphology. Consequently, the Indigo‐passivated perovskite film exhibits increased grain size with better uniformity, reduced grain boundaries, lowered defect density, and retarded ion migration, boosting the device efficiency up to 23.22%, and ≈21% for large‐area device (1 cm 2 ). Furthermore, the Indigo passivation can enhance device stability in terms of both humidity and thermal stress. These results provide not only new insights into the multipassivation role of natural organic dyes but also a simple and low‐cost strategy to prepare high‐quality hybrid perovskite films for optoelectronic applications based on Indigo derivatives.
Oxygen level: the dominant of resistive switching characteristics in cerium oxide thin films
Publisher: IOP Publishing
Date: 14-08-2012
DOI: 10.1088/0022-3727/45/35/355101
Abstract: Currently, resistive switching mechanisms in metal oxide thin films are not clearly understood due to lack of solid evidence. In this work, the switching behaviour of the Au/CeO 2 /conductive glass structure was analysed, where reproducible and pronounced resistive switching characteristics were obtained. The role of oxygen vacancies in switching characteristics was investigated. The concentration of oxygen vacancies in the CeO 2 thin films was controlled by post-annealing and monitored by x-ray photon spectroscopy. The reduction in the switching ratio and the intensity of the peak associated with oxygen concentration O 1s level after annealing treatment confirmed the dominating role of oxygen vacancies in switching behaviour.
Liquid-Metal Solvents for Designing Hierarchical Nanoporous Metals at Low Temperatures
Publisher: American Chemical Society (ACS)
Date: 17-08-2023
Recent developments in black phosphorus transistors
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TC01484K
Abstract: The discovery of graphene has inspired great research interest in two-dimensional (2D) layered nanomaterials during the past decade.
Thermopower and chemical stability of Na0.77 CoO 2 /Ca3 Co4 O9 composites
Publisher: Elsevier BV
Date: 2014
Silver nanowire/nickel hydroxide nanosheet composite for a transparent electrode and all-solid-state supercapacitor
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8NA00110C
Abstract: Silver nanowire (Ag NW) based composites have shown a great potential not just in transparent electrodes but in erse functional applications.
First-principles high-throughput screening of bulk piezo-photocatalytic materials for sunlight-driven hydrogen production
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2TA05941J
Abstract: A high-throughput screening of piezo-photocatalytic materials based on first-principles calculations and a simple electrostatic model is presented that identifies new bulk compounds able to catalyse the water splitting reaction under sunlight.
Perovskite Quantum Dot Solar Cells Fabricated from Recycled Lead-Acid Battery Waste
Publisher: American Chemical Society (ACS)
Date: 06-12-2021
Manipulating resistive states in oxide based resistive memories through defective layers design
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7RA11681K
Abstract: In this work, multilevel switching was achieved by a strategically designed alternative multi-layer structure with pure and Mn-doped SnO 2 .
Recent advances in flexible alkaline zinc-based batteries: Materials, structures, and perspectives
Publisher: Elsevier BV
Date: 12-2023
Room-temperature mechanocaloric effects in lithium-based superionic materials
Publisher: Springer Science and Business Media LLC
Date: 20-08-2018
DOI: 10.1038/S41467-018-05835-9
Abstract: Mechanocaloric materials undergo sizable temperature changes during stress-induced phase transformations and hence are highly sought after for solid-state cooling applications. Most known mechanocaloric materials, however, operate at non-ambient temperatures and involve first-order structural transitions that pose practical cyclability issues. Here, we demonstrate large room-temperature mechanocaloric effects in the absence of any structural phase transformation in the fast-ion conductor Li 3 N (|Δ S | ~ 25 J K −1 kg −1 and |Δ T | ~ 5 K). Depending on whether the applied stress is hydrostatic or uniaxial the resulting caloric effect is either direct (Δ T 0) or inverse (Δ T 0). The dual caloric response of Li 3 N is due exclusively to stress-induced variations on its ionic conductivity, which entail large entropy and volume changes that are fully reversible. Our work should motivate the search of large and dual mechanocaloric effects in a wide variety of superionic materials already employed in electrochemical devices.
Convertible Insulator–Conductor Transition in Silver Nanowire Networks: Engineering the Nanowire Junctions
Publisher: American Chemical Society (ACS)
Date: 13-06-2019
Bio‐Inspired Artificial Perceptual Devices for Neuromorphic Computing and Gesture Recognition
Publisher: Wiley
Date: 17-03-2023
Abstract: Artificial perception technologies capable of sensing and feeling mechanical stimuli like human skins are critical enablers for electronic skins (E‐Skins) needed to achieve artificial intelligence. However, most of the reported electronic skin systems lack the capability to process and interpret the sensor data. Herein, a new design of artificial perceptual system integrating ZnO‐based synaptic devices with Pt/carbon nanofibers‐based strain sensors for stimuli detection and information processing is presented. Benefiting from the controllable ion migration after indium doping, the device can emulate various essential functions, such as short‐term/long‐term plasticity, paired‐pulse facilitation, excitatory post‐synaptic current, and synaptic plasticity depending on the number, frequency, litude, and width of the applied pulses. The Pt/carbon nanofibers‐based strain sensors can detect subtle human motion and convert mechanical stimuli into electrical signals, which are further processed by the ZnO devices. By attaching the integrated devices to finger joints, it is demonstrated that they can recognize handwriting and gestures with a high accuracy. This work offers new insights in designing artificial synapses and sensors to process and recognize information for neuromorphic computing and artificial intelligence applications.
Synthesis and growth mechanism of Cr-doped ZnO single-crystalline nanowires
Publisher: Elsevier BV
Date: 08-2007
Cationic Oxidative Leaching Engineering Modulated In Situ Self-Reconstruction of Nickel Sulfide for Superior Water Oxidation
Publisher: American Chemical Society (ACS)
Date: 30-05-2023
High-Performance Nanocomposite Based Memristor with Controlled Quantum Dots as Charge Traps
Publisher: American Chemical Society (ACS)
Date: 19-03-2013
DOI: 10.1021/AM400168M
Abstract: We report a novel approach to improve the resistive switching performance of semiconductor nanorod (NR) arrays, by introducing ceria (CeO2) quantum dots (QDs) as surface charge trappers. The vertically aligned zinc oxide (ZnO) (NR) arrays were grown on transparent conductive glass by electrochemical deposition while CeO2 QDs were prepared by a solvothermal method. Subsequently, the as-prepared CeO2 QDs were embedded into a ZnO NR array by dip coating to obtain a CeO2-ZnO nanocomposite. Interestingly, such a device exhibits excellent resistive switching properties with much higher ON/OFF ratios, better uniformity, and stability over the pure ZnO and CeO2 nanostructures. The origin of resistive switching was studied and the role of heterointerface was discussed.
Enhanced Electrochemical Performance of Li-Rich Layered Cathode Materials by Combined Cr Doping and LiAlO2 Coating
Publisher: American Chemical Society (ACS)
Date: 26-12-2018
Synthesis and electrochemical properties of cation-disordered Li-Ni-Ti-O compounds as cathode material for lithium ion batteries
Publisher: Elsevier BV
Date: 12-2017
Synthesis of Au and Pt Hollow Capsules with Single Holes via Pickering Emulsion Strategy
Publisher: American Chemical Society (ACS)
Date: 07-12-2015
Ga substitution and oxygen diffusion kinetics in Ca3Co 4O9+δ-based thermoelectric oxides
Publisher: American Chemical Society (ACS)
Date: 20-06-2013
DOI: 10.1021/JP403592S
Three-Dimensional Hierarchical Nanostructured Cu/Ni–Co Coating Electrode for Hydrogen Evolution Reaction in Alkaline Media
Publisher: Springer Science and Business Media LLC
Date: 30-06-2015
Oriented Graphene Based Electrochemical Supercapacitor
Publisher: American Chemical Society (ACS)
Date: 28-01-2019
DOI: 10.26434/CHEMRXIV.7637030.V1
Abstract: Graphene has attracted substantial interest as potential carbon electrode material for energy storage applications. Yet, the utility of this material for these applications is governed by its stability and microstructure (i.e., surface area and porosity). Graphene can be prepared in controlled orientation by changing the surface chemistry of GO flakes in suspensions via reduction which causes the graphene to coagulate and self-assemble in specific patterns. Tuning the structure and porosity of oriented graphene is possible by varying the synthesis conditions. Herein, we report the growth of oriented graphene from a relatively small flake size GO suspension. The prepared electrode material demonstrated an excellent electrochemical performance with a supercapacitance value of 195 F g-1 at 1 mV s-1 and low real impedance with good stability and integrity after 4000 cycles of continuous charge-discharge in 1 M KOH electrolyte. This excellent performance is due to the unique architecture of the oriented graphene which comprises micro-slits and meso-channels among the sheets. The meso-channels were suggested to allow rapid diffusion of charge carriers and ions while the micro-slits increase more surface area for electrochemical interactions per unit volume. The observations reported herein create a new understanding of the structure-stability-performance trade-off in oriented graphene and layout the foundation for further investigations on their sustainable utilization in energy storage applications.
Nickel-Doped Manganese Dioxide Electrocatalysts with MXene Surface Decoration for Oxygen Evolution Reaction
Publisher: American Chemical Society (ACS)
Date: 02-11-2022
Room Temperature Ferromagnetism in Transition Metal Doped TiO<SUB>2</SUB> Nanowires
Publisher: American Scientific Publishers
Date: 12-2009
Fe3O4 wrapped by reduced graphene oxide as a high-performance anode material for lithium-ion batteries
Publisher: Springer Science and Business Media LLC
Date: 13-12-2019
Resistive Switching Characteristics in Electrochemically Synthesized ZnO Films
Publisher: American Institute of Mathematical Sciences (AIMS)
Date: 2015
MoS2 nanoflower incorporated with Au/Pt nanoparticles for highly efficient hydrogen evolution reaction
Publisher: Springer Science and Business Media LLC
Date: 15-01-2021
Recent progress in tungsten oxides based memristors and their neuromorphological applications
Publisher: Springer Science and Business Media LLC
Date: 09-09-2016
Concentration of electrons at grain boundaries in TiO2 (rutile): Impact on charge transport and reactivity
Publisher: Elsevier BV
Date: 04-2014
Photothermal materials: a key platform enabling highly efficient water evaporation driven by solar energy
Publisher: Elsevier BV
Date: 06-2019
Controlled growth and properties of Pb2+ doped ZnO nanodisks
Publisher: Elsevier BV
Date: 05-2007
Colossal permittivity in percolative ceramic/metal dielectric composites
Publisher: Elsevier BV
Date: 04-2016
Hybrid perovskite quantum dot/non-fullerene molecule solar cells with efficiency over 15%
Publisher: Wiley
Date: 19-04-2021
Abstract: Organic‐inorganic hybrid film using conjugated materials and quantum dots (QDs) are of great interest for solution‐processed optoelectronic devices, including photovoltaics (PVs). However, it is still challenging to fabricate conductive hybrid films to maximize their PV performance. Herein, for the first time, superior PV performance of hybrid solar cells consisting of CsPbI 3 perovskite QDs and Y6 series non‐fullerene molecules is demonstrated and further highlights their importance on hybrid device design. In specific, a hybrid active layer is developed using CsPbI 3 QDs and non‐fullerene molecules, enabling a type‐II energy alignment for efficient charge transfer and extraction. Additionally, the non‐fullerene molecules can well passivate the QDs, reducing surface defects and energetic disorder. The ch ion CsPbI 3 QD/Y6‐F hybrid device has a record‐high efficiency of 15.05% for QD/organic hybrid PV devices, paving a new way to construct solution‐processable hybrid film for efficient optoelectronic devices.
Growth of Lithium Lanthanum Titanate Nanosheets and Their Application in Lithium-Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 05-01-2016
Abstract: In this work, lithium-doped lanthanum titanate (LLTO) nanosheets have been prepared by a facile hydrothermal approach. It is found that with the incorporation of lithium ions, the morphology of the product transfers from rectangular nanosheets to irregular nanosheets along with a transition from La2Ti2O7 to Li0.5La0.5TiO3. The as-prepared LLTO nanosheets are used to enhance electrochemical performance of the LiCo1/3Ni1/3Mn1/3O2 (CNM) electrode by forming a higher lithium-ion conductive network. The LiCo1/3Ni1/3Mn1/3O2-Li0.5La0.5TiO3 (CNM-LLTO) electrode shows better a lithium diffusion coefficient of 1.5 × 10(-15) cm(2) s(-1), resulting from higher lithium-ion conductivity of LLTO and shorter lithium diffusion path, compared with the lithium diffusion coefficient of CNM electrode (5.44 × 10(-16) cm(2) s(-1)). Superior reversibility and stability are also found in the CNM-LLTO electrode, which retains a capacity at 198 mAh/g after 100 cycles at a rate of 0.1 C. Therefore, it can be confirmed that the existence of LLTO nanosheets can act as bridges to facilitate the lithium-ion diffusion between the active materials and electrolytes.
Enhanced Electrochemical Performance of Ni-Rich Cathode Materials with Li1.3Al0.3Ti1.7(PO4)3 Coating
Publisher: American Chemical Society (ACS)
Date: 26-03-2020
A monolithic artificial iconic memory based on highly stable perovskite-metal multilayers
Publisher: AIP Publishing
Date: 15-07-2020
DOI: 10.1063/5.0009713
Abstract: Artificial iconic memories, also called photomemories, are new types of nonvolatile memory that can simultaneously detect and store light information in a monolithic device. Several approaches have been proposed to construct artificial iconic memories, such as three-terminal field effect transistors, which can achieve an effective control of the gate voltage and external light terminals. The drawbacks in constructing these memories involve complicated fabrication processes, and the resulting performance of, for ex le, perovskite transistor-type photomemories is limited by the low carrier mobilities and poor ambient stabilities, whereas architectures based on floating gate modulations entail strict interface engineering and poor device reliability. In this paper, we propose a novel monolithic artificial iconic memory with a multilayer architecture of indium tin oxide erovskite/gold erovskite/silver, which combines the memory and photodetector functionalities of perovskites in an integrated device. The bottom perovskite layer plays the role of a photodetector, modulating the voltage bias on the top perovskite layer that serves as a resistive switching memory. This multilayer perovskite device can store photo-sensing data in its resistive states, with a memory retention of 5 × 103 s and ambient stability longer than sixty days. As a prototype demonstration, a 7 × 7 artificial iconic memory array is constructed to detect and store data on light intensity distribution, enabling a nonvolatile imaging functionality. Our work provides a new platform for designing perovskite-based architectures with simultaneous light detection and data storage capabilities.
Reversible Hydrophobic to Hydrophilic Transition in Graphene via Water Splitting Induced by UV Irradiation
Publisher: Springer Science and Business Media LLC
Date: 23-09-2014
DOI: 10.1038/SREP06450
Electrodeposited cobalt sulfide on a vertical graphene nanocomposite for high-performance supercapacitors
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1NJ03777C
Abstract: A novel cobalt sulfide/vertical graphene (CoS/VG) composite electrode was fabricated via a facile electrodeposition method for high-performance supercapacitor application.
Stress-relaxation heat treatment in FeSiBNb amorphous alloy: Thermal, microstructure, nanomechanical and magnetic texture measurements
Publisher: Elsevier BV
Date: 06-2018
Related Organisations
Related Funding Activities
Would More Highly-Qualified Teachers And Trainers Help To Address Quality Problems In The Australian Vocational Education And Training System
Start Date: 2015
End Date: 2017
Funder: Australian Research Council
View Funded ActivityExtending The Museum `family': Including The Non-traditional Audience
Start Date: 2012
End Date: 2014
Funder: University of Technology Sydney
View Funded ActivityWorking Together: Integrated Literacy And Numeracy Support In VET
Start Date: 2010
End Date: 2011
Funder: Department of Education, Employment and Workplace Relations, Australian Government
View Funded ActivityInvestigating The Crisis: Production Workers' Literacy And Numeracy Practices
Start Date: 2011
End Date: 2012
Funder: National Centre for Vocational Education Research
View Funded ActivityCosmopolitan Civil Societies? Developing Shared Research Perspectives On Social Cohesion And Change
Start Date: 2006
End Date: 2006
Funder: University of Technology Sydney
View Funded ActivityA Community Learning Centre To Promote A Culture Of Learning
Start Date: 2003
End Date: 2005
Funder: Telstra Foundation
View Funded ActivityAdaptive Ace Organisations
Start Date: 2006
End Date: 2006
Funder: NSW Department of Education and Training
View Funded ActivityNumeracy Research In NSW Primary Schools
Start Date: 2001
End Date: 2001
Funder: NSW Department of Education and Training
View Funded ActivityNumeracy Research In NSW Primary Schools Part 2
Start Date: 2002
End Date: 2002
Funder: NSW Department of Education and Training
View Funded ActivityHow More Highly-qualified Teachers And Trainers Can Improve The Australian Vocational Education And Training System
Start Date: 2014
End Date: 2016
Funder: Australian Research Council
View Funded ActivityLinkage Projects - Grant ID: LP140100044
Start Date: 04-2015
End Date: 12-2018
Amount: $120,000.00
Funder: Australian Research Council
View Funded ActivityLinkage Projects - Grant ID: LP190100829
Start Date: 07-2020
End Date: 06-2023
Amount: $324,072.00
Funder: Australian Research Council
View Funded ActivityLinkage Projects - Grant ID: LP190100113
Start Date: 08-2020
End Date: 09-2023
Amount: $422,881.00
Funder: Australian Research Council
View Funded ActivityDiscovery Projects - Grant ID: DP230101040
Start Date: 02-2023
End Date: 02-2026
Amount: $516,000.00
Funder: Australian Research Council
View Funded ActivityDiscovery Projects - Grant ID: DP210100879
Start Date: 2021
End Date: 12-2023
Amount: $381,238.00
Funder: Australian Research Council
View Funded ActivityMid-Career Industry Fellowships - Grant ID: IM230100079
Start Date: 12-2023
End Date: 12-2027
Amount: $1,019,275.00
Funder: Australian Research Council
View Funded ActivityDiscovery Projects - Grant ID: DP110102391
Start Date: 04-2011
End Date: 04-2014
Amount: $420,450.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE180100141
Start Date: 2018
End Date: 12-2018
Amount: $326,367.00
Funder: Australian Research Council
View Funded ActivityLinkage Projects - Grant ID: LP210200495
Start Date: 01-2023
End Date: 2026
Amount: $486,640.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE210100109
Start Date: 11-2021
End Date: 11-2022
Amount: $240,000.00
Funder: Australian Research Council
View Funded ActivityARC Future Fellowships - Grant ID: FT140100032
Start Date: 10-2014
End Date: 12-2018
Amount: $735,144.00
Funder: Australian Research Council
View Funded ActivityIndustrial Transformation Training Centres - Grant ID: IC230100042
Start Date: 2023
End Date: 12-2027
Amount: $5,000,000.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE230100113
Start Date: 2023
End Date: 12-2023
Amount: $970,000.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE210100086
Start Date: 10-2021
End Date: 09-2023
Amount: $489,250.00
Funder: Australian Research Council
View Funded ActivityIndustrial Transformation Research Hubs - Grant ID: IH210100040
Start Date: 08-2022
End Date: 07-2027
Amount: $5,000,000.00
Funder: Australian Research Council
View Funded ActivityIndustrial Transformation Research Hubs - Grant ID: IH230100005
Start Date: 2023
End Date: 12-2027
Amount: $5,000,000.00
Funder: Australian Research Council
View Funded Activity