ORCID Profile
0000-0001-6000-3180
Current Organisations
University of Canterbury
,
The University of Newcastle
,
Royal Children's Hopsital
,
Murdoch Childrens Research Institute
,
University of Melbourne
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Materials Engineering | Functional Materials | Nanomaterials | Compound Semiconductors | Catalytic Process Engineering | Materials Engineering not elsewhere classified | Electronic and Magnetic Properties of Condensed Matter; Superconductivity | Condensed Matter Physics | Environmental Technologies | Metals and Alloy Materials | Engineering Instrumentation | Composite and Hybrid Materials | Photonics, Optoelectronics and Optical Communications | Condensed Matter Physics not elsewhere classified
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in Engineering | Expanding Knowledge in Technology | Expanding Knowledge in the Physical Sciences | Clay Products | Hydrogen Production from Renewable Energy | Energy Transformation not elsewhere classified | Renewable Energy not elsewhere classified | Energy not elsewhere classified | Expanding Knowledge in the Chemical Sciences | Stone and Clay Exploration |
Related Links
Publications
Telehealth and virtual health monitoring in cystic fibrosis.
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 16-09-2021
Stress effect on the properties of Ni80 Fe20 /Au or Cu composite wires via electrodeposition
Publisher: Inderscience Publishers
Date: 2009
Influence of mutual substitution between La and Gd on the glass-forming ability of Al–Ni–La–Gd alloys
Publisher: Elsevier BV
Date: 04-2015
Comparing definitions of bronchodilator response in a population-based cohort of 6-year-old children.
Publisher: Wiley
Date: 08-05-2023
DOI: 10.1002/PPUL.26456
Synthesis, Structure, and Magnetic Properties of [Li(H2O)M(N2H3CO2)3]·0.5H2O (M = Co,Ni) as Single Precursors to LiMO2 Batt
Publisher: American Chemical Society (ACS)
Date: 28-02-2006
DOI: 10.1021/CM0523891
The structure and magnetic properties of NiO with different sizes
Publisher: IEEE
Date: 2008
Vacancy-induced room-temperature ferromagnetism in Ga–TiO2
Publisher: Elsevier BV
Date: 05-2012
Structural and magnetic properties of ZnO nanocrystals in (Zn, Al)O films using pulse laser deposition
Publisher: American Scientific Publishers
Date: 03-2011
Abstract: In this manuscript, we reported that the room temperature ferromagnetism was observed in (Zn0.70, Al0.30)O film, which was fabricated by a novel physical method (pulse laser deposition (PLD)). The film was deposited from (Zn0.80, Al0.20)O ceramic target onto quartz (110) substrate by PLD at 400 degrees C under an oxygen partial pressure of 10(-4) torr. TEM result shows ZnO NCs with diameter of 4-5 nm and they are quite uniformly embedded into amorphous ZnO-Al2O3 phase. The SAED shows clearly that ZnO NCs possess polycrystalline structure. The SQUID measurement shows that the film has room temperature ferromagnetism (saturation magnetization = 3.6 emu/cm3) with Curie temperature above 300 K. The magnitude of magnetic moment of the films can be changed by tuning ZnO NCs size. Both oxygen partial pressure and film thickness studies show that the origin of ferromagnetism is possibly related to the oxygen defects at the surface of ZnO NCs.
Pulmonary surveillance in pediatric hematopoietic stem cell transplant: A multinational multidisciplinary survey
Publisher: Wiley
Date: 28-07-2021
DOI: 10.1002/CNR2.1501
Abstract: Hematopoietic Stem Cell Transplant (HSCT) is an established treatment for malignant and non‐malignant conditions and pulmonary disease is a leading cause of late term morbidity and mortality. Accurate and early detection of pulmonary complications is a critical step in improving long term outcomes. Existing guidelines for surveillance of pulmonary complications post‐HSCT contain conflicting recommendations. To determine the breadth of current practice in monitoring for pulmonary complications of pediatric HSCT. An institutional review board approved, online, anonymous multiple‐choice survey was distributed to HSCT and pulmonary physicians from the United States of America and Australasia using the REDcap platform. The survey was developed by members of the American Thoracic Society Working Group on Complications of Childhood Cancer, and was designed to assess patient management and service design. A total of 40 (34.8%) responses were received. The majority (62.5%) were pulmonologists, and 82.5% were from the United States of America. In all, 67.5% reported having a protocol for monitoring pulmonary complications and 50.0% reported adhering “well” or “very well” to protocols. Pulmonary function tests (PFTs) most commonly involved spirometry and diffusion capacity for carbon monoxide. The frequency of PFTs varied depending on time post‐HSCT and presence of complications. In all, 55.0% reported a set threshold for a clinically significant change in PFT. These results illustrate current variation in surveillance for pulmonary complications of pediatric HSCT. The results of this survey will inform development of future guidelines for monitoring of pulmonary complications after pediatric HSCT.
Study of the grain size, particle size and roughness of substrate in relation to the magnetic properties of electroplated permalloy
Publisher: Elsevier BV
Date: 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
Magnetic anisotropies in cobalt-nickel ferrites (Nix Co 1-x Fe2 O4 )
Publisher: Korean Physical Society
Date: 15-05-2008
DOI: 10.3938/JKPS.52.1483
Magnetic properties of Sm-doped rutile TiO2 nanorods
Publisher: Elsevier BV
Date: 12-2016
Optimization of surface coating on Fe3O4 nanoparticles for high performance magnetic hyperthermia agents
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM30472D
Electronic and Magnetic Properties of Transition-Metal-Doped Monolayer Black Phosphorus by Defect Engineering
Publisher: American Chemical Society (ACS)
Date: 02-05-2016
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
Effects of heat treatment and magnetoannealing on nanocrystalline Co-ferrite powders
Publisher: AIP Publishing
Date: 15-12-2005
DOI: 10.1063/1.2148632
Abstract: This work consists of three parts: the effects of heat treatment (slow cooling and quenching), magnetoannealing, and postannealing of s les with induced anisotropy. It has been found that noncomplete inverse spinel structure was the result after annealing at higher temperature and quenching. Our Mössbauer spectroscopy study confirmed noncomplete inverse structure after quenching, while inverse spinel structure was formed after slow cooling. The kinetics of the formation of induced anisotropy during magnetoannealing has been investigated in this study. Reduction of crystalline magnetic anisotropy was observed, as coercivity decreased after magnetoannealing. The change of remanence ratio and coercivity followed the expected equations for ion diffusion. A relative large anisotropy in magnetization was evident. A postannealing resulted in the conversion into the initial isotropic stage. The process could be well described using the equations of ion diffusion.
Assessment of Primary Ciliary Dyskinesia Predictive Tools
Publisher: European Respiratory Society (ERS)
Date: 18-06-2020
Microstructure evolution of Ni80 Fe20 -Cu deposited by electroplating under an applied field
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2007
Bronchoalveolar lavage in children: Still the gold standard
Publisher: Wiley
Date: 03-11-2020
DOI: 10.1002/PPUL.25136
Asymmetrical magneto-impedance effect in NiFe/SiO2/Cu composite wire with a sputtered NiFe seed layer
Publisher: IOP Publishing
Date: 05-2010
Photocatalytic solar fuel production and environmental remediation through experimental and DFT based research on CdSe-QDs-coupled P-doped-g-C3N4 composites
Publisher: Elsevier BV
Date: 08-2020
Effect of Magnetic Coating Layer Thickness on the Magnetic Properties of Electrodeposited NiFe/Cu Composite Wires
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2006
The magnetism of BiFeO3 powders
Publisher: World Scientific Pub Co Pte Lt
Date: 04-2015
DOI: 10.1142/S1793604715500277
Abstract: Conventional sintering and direct ball milling of Bi 2 O 3 + Fe 2 O 3 mixture were used for the fabrication of BiFeO 3 powders. The fabricated powders were performed annealing or high energy ball milling to vary the grain size from bottom-up or top-down. It was found that the magnetization of the powders synthesized by both methods plotted with the reciprocal of the grain size could be linearly fitted, indicating that the magnetism is from the finite size effect. Exchange bias phenomenon was observed after field cooling (FC) of the powders, confirming the magnetization is due to the uncompensated or canted surface spins. No spin glass behavior was found in these powders.
Primary health care utilization and hospital readmission in children with asthma: A multi-site linked data cohort study.
Publisher: Informa UK Limited
Date: 03-02-2023
Electrodeposition and characteristics of Ni80Fe20/Cu composite wires
Publisher: Elsevier BV
Date: 09-2006
Zn vacancy induced ferromagnetism in K doped ZnO
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TC02936H
Abstract: K doped ZnO shows room temperature ferromagnetism from both theoretical and experimental studies. This ferromagnetism is mainly attributed to the formation of the Zn vacancy. The K dopants can stabilize the Zn vacancy by forming a defect complex and K substitution can induce magnetism via lattice distortion.
FePt films fabricated by electrodeposition
Publisher: AIP Publishing
Date: 05-2007
DOI: 10.1063/1.2711810
Abstract: In this work, we have fabricated FePt films with a thickness in the range of 0.1–1μm using the combination of electrodeposition and postannealing. FePt films with a composition around Fe50Pt50 were formed by electrodeposition onto the Si (100) substrates with an underlayer of Au, Ag, or Cu, and subsequently annealed at a temperature in the range of 200–900°C for 20min. From our x-ray diffraction analysis, the L10 FePt phase started to form after annealing at 400°C for the film deposited on the Au underlayer. The highest coercivity (10kOe) was found after annealing at 600°C. When the FePt was deposited on the Ag underlayer, a high coercivity over 15kOe with an out-of-plane anisotropy has been achieved after annealing at 700–800°C. The magnetic anisotropy was associated with the crystallographic texture. The magnetic properties of FePt films deposited on the Cu underlayer were relatively poor with lower values of coercivity (4–5kOe as the maximum coercivity), probably due to the large grain size.
Fabrication and microstructure of high coercivity FePt thin films at 400 °C
Publisher: AIP Publishing
Date: 30-01-2006
DOI: 10.1063/1.2168256
Abstract: L 1 0 phase FePt thin films deposited on MgO (100) single-crystal substrate with good (001) texture were investigated. Epitaxial growth of the FePt (001) films was observed with a deposition temperature of 400 °C. With ultrathin Ag intermediate layers deposited between FePt layers, the film structures changed from an interconnection network to an isolated-island character. The perpendicular coercivity of the FePt film dramatically increased from 6.5 to 32.5 kOe. The improvement of the magnetic properties may be attributed to the formation of island structures by the additive Ag in the FePt films.
Promoting visible-light photocatalytic activities for carbon nitride based 0D/2D/2D hybrid system: Beyond the conventional 4-electron mechanism
Publisher: Elsevier BV
Date: 08-2020
Preface
Publisher: World Scientific Pub Co Pte Lt
Date: 12-2009
Optimism with Caution: Elexacaftor-Tezacaftor-Ivacaftor in Patients with Advanced Pulmonary Disease.
Publisher: American Thoracic Society
Date: 08-2021
Paediatric assessment in a general metropolitan emergency department
Publisher: Wiley
Date: 06-2013
DOI: 10.1111/JPC.12234
Monodispersed ZnO Quantum Dots with Nd Doping
Publisher: American Scientific Publishers
Date: 05-2015
Magnetic and transport properties of n-type Fe doped In 2 O 3 and ZnO films
Publisher: American Scientific Publishers
Date: 06-2012
Co/CoO Hybrid Film by Post Annealing
Publisher: Trans Tech Publications, Ltd.
Date: 04-2006
DOI: 10.4028/WWW.SCIENTIFIC.NET/SSP.111.175
Abstract: Co/CoO hybrid films are prepared by annealing Co films with various ratio of oxygen of O2/Ar mixture. The nanocomposite film shows a relatively large exchange bias (5.32 kOe) and coercivity (HC-: 6.17 kOe) taken at 80 K when formed by post annealing at 473 K under 3% O2 for 1h. Both are much larger than that of Co/CoO nanocomposite by reactive sputtering with an oxygen partial pressure. Investigation shows that the formation of interface by post annealing is of importance for the large exchange bias and enhanced coercivity. The surface CoO, grain size of CoO and composition may also contribute to magnetic properties of the post annealing film.
Identification of pediatric bronchiolitis obliterans syndrome posthematopoietic stem cell transplantation; surveillance is the key.
Publisher: Wiley
Date: 20-08-2020
DOI: 10.1002/PPUL.25023
Room-temperature ferromagnetism of Cu-doped ZnO films probed by soft x-ray magnetic circular dichroism
Publisher: American Physical Society (APS)
Date: 08-11-2010
Patient and Family Perspectives Regarding the Use of Telehealth For Cystic Fibrosis Care.
Publisher: Wiley
Date: 26-01-2021
DOI: 10.1002/PPUL.25262
Tuning Phase Transition and Thermochromic Properties of Vanadium Dioxide Thin Films via Cobalt Doping
Publisher: American Chemical Society (ACS)
Date: 24-04-2022
Abstract: Vanadium dioxide (VO
Telehealth in Cystic Fibrosis. A systematic review incorporating a novel scoring system and expert weighting to identify a 'top 10 manuscripts' to inform future best practices implementation.
Publisher: Elsevier BV
Date: 05-2023
Intrinsic Ferromagnetism in the Diluted Magnetic SemiconductorCo :
Publisher:
American Physical Society (APS)
Date:
23-11-2016
Publisher: American Physical Society (APS)
Date: 23-11-2016
Emerging Advanced Nanomaterials and their Applications
Publisher: Wiley
Date: 03-2020
Virtual monitoring in CF - the importance of continuous monitoring in a multi-organ chronic condition.
Publisher: Frontiers Media SA
Date: 04-05-2023
DOI: 10.3389/FDGTH.2023.1196442
Abstract: Cystic Fibrosis (CF) is a chronic life-limiting condition that affects multiple organs within the body. Patients must adhere to strict medication regimens, physiotherapy, diet, and attend regular clinic appointments to manage their condition effectively. This necessary but burdensome requirement has prompted investigations into how different digital health technologies can enhance current care by providing the opportunity to virtually monitor patients. This review explores how virtual monitoring has been harnessed for assessment or performance of physiotherapy/exercise, diet/nutrition, symptom monitoring, medication adherence, and wellbeing/mental-health in people with CF. This review will also briefly discuss the potential future of CF virtual monitoring and some common barriers to its current adoption and implementation within CF. Due to the multifaceted nature of CF, it is anticipated that this review will be relevant to not only the CF community, but also those investigating and developing digital health solutions for the management of other chronic diseases.
Benchmarking single-cell hashtag oligo demultiplexing methods
Publisher: Cold Spring Harbor Laboratory
Date: 21-12-2022
DOI: 10.1101/2022.12.20.521313
Abstract: S le multiplexing is often used to reduce cost and limit batch effects in single-cell RNA sequencing (scRNA-seq) experiments. A commonly used multiplexing technique involves tagging cells prior to pooling with a hashtag oligo (HTO) that can be sequenced along with the cells’ RNA to determine their s le of origin. Several tools have been developed to demultiplex HTO sequencing data and assign cells to s les. In this study, we critically assess the performance of seven HTO demultiplexing tools: hashedDrops, HTODemux, GMM-Demux, demuxmix, deMULTIplex, BFF and HashSolo . The comparison uses data sets where each s le has also been demultiplexed using genetic variants from the RNA, enabling comparison of HTO demultiplexing techniques against complementary data from the genetic “ground truth”. We find that all methods perform similarly where HTO labelling is of high quality, but methods that assume a bimodal counts distribution perform poorly on lower quality data. We also suggest heuristic approaches for assessing the quality of HTO counts in a scRNA-seq experiment.
Optimal management strategies to control local population growth or population spread may not be the same
Publisher: Wiley
Date: 06-2010
DOI: 10.1890/09-0316.1
Abstract: The objective of most pest management programs is to "control" the pest species. However, optimal control of local abundance and population growth may require different management strategies than optimal control of spatial spread. We use coupled demographic-dispersal models to address the relative importance of different management approaches to these two main control objectives for the invasive thistle Carduus nutans. The models are parameterized with data from thistle populations in the native (France) and invaded ranges (Australia and New Zealand). We assess a wide range of commonly used management strategies for their absolute and relative impacts on population growth and spread in both invaded-range scenarios. The projected population growth rate in New Zealand is more than twice that in Australia, while the spread rate is more than four times the Australian value. In general, spread and growth are both most strongly affected by the same life cycle transitions however, in a few cases certain vital rates disproportionately affect either spread or growth. The transition that represents the contribution of large rosettes in one year to the number of large rosettes in the following year (the large rosette-large rosette transition) in Australia is dominated by reproduction (rather than survival) and hence is relatively more important to spread than to population growth. In New Zealand, the small rosette-small rosette transition is also predominantly dispersal-related. However, establishment of small plants from the seed bank contributes more to population growth than spread, as no dispersal is involved. The fine-resolution vital-rate-based modeling approach allows us to identify potentially novel optimal management strategies: approaches that reduce microsite availability show promise for reducing both population growth and spread, while strategies that affect dispersal parameters will affect spread. Additionally, the relative ranking of some biocontrol agents shifts depending on whether control of population growth or population spread is the desired outcome and therefore could alter which of the agents are preferred for release in a new area. The possibility of differences in ranked agent effectiveness has been predicted theoretically, but never before demonstrated using field data.
Ferromagnetism in Cr doped In2O3
Publisher: Elsevier BV
Date: 03-2013
Exchange coupling in CoO–Co bilayer
Publisher: Elsevier BV
Date: 08-2006
Mixed Copper/Copper‐Oxide Anchored Mesoporous Fullerene Nanohybrids as Superior Electrocatalysts toward Oxygen Reduction Reaction
Publisher: Wiley
Date: 03-2020
Abstract: Developing a highly active, stable, and efficient non-noble metal-free functional electrocatalyst to supplant the benchmark Pt/C-based catalysts in practical fuel cell applications remains a stupendous challenge. A rational strategy is developed to directly anchor highly active and dispersed copper (Cu) nanospecies on mesoporous fullerenes (referred to as Cu-MFC
Pulmonary Mycobacterium abscessus complex in children with cystic fibrosis: A practical management guideline
Publisher: Wiley
Date: 18-03-2019
DOI: 10.1111/JPC.14427
Abstract: The treatment of Mycobacterium abscessus complex (MABSC) pulmonary infections is an emerging challenge in patients with cystic fibrosis (CF). Multidrug therapy for prolonged durations is required and carries the significant burden of drug-related toxicity, cost and selective pressure for multiresistant bacteria. International guidelines acknowledge that clinical and in vitro data to support treatment regimens are limited, particularly in children. As part of a collaboration between the infectious diseases and respiratory units at our institution, we have developed a modified treatment guideline that aims to balance the aims of MABSC eradication and slowing disease progression with minimising drug toxicity and resistance. The outcomes of this treatment approach will be monitored and reported. In this manuscript, we discuss the available evidence for treatment choices and present our treatment guideline for paediatric patients with CF and MABSC infection.
Associations between peak oxygen uptake, lung function, and bronchiectasis in children with cystic fibrosis in the era of CFTR modulators.
Publisher: Wiley
Date: 02-2021
DOI: 10.1002/PPUL.25275
An investigation of structure, magnetic properties and magnetoresistance of Ni films prepared by sputtering
Publisher: Elsevier BV
Date: 12-2004
A scoping review of lung function in children and adolescents living with HIV in the era of antiretroviral treatment.
Publisher: Wiley
Date: 21-03-2023
DOI: 10.1002/PPUL.26365
Abstract: Human immunodeficiency virus (HIV) in children and adolescents remains an important health challenge in many countries and is commonly associated with lung disease. The introduction of antiretroviral therapy (ART) has greatly improved survival but chronic lung disease is a common ongoing challenge. We conducted a scoping review of studies that have reported lung function in school‐aged children and adolescents living with HIV. A systematic literature search was performed by searching Medline, Embase, and PubMed databases, limited to articles published between 2011 and 2021 in English language. Inclusion criteria were studies involving participants living with HIV aged 5–18 years and having spirometry data. The primary outcome was lung function as measured by spirometry. Twenty‐one studies were included in the review. Most study participants were living in the sub‐Saharan African region. The prevalence of reduced forced expiratory volume in 1 s (FEV 1 ) ranged from 25.3% to 73% across studies, reduced forced vital capacity (FVC) ranged from 10% to 42% and reduced FEV 1 /FVC ranged from 3% to 26%. The mean z ‐score of FEV 1 ranged from −2.19 to −0.73, mean zFEV 1 /FVC ranged from −0.74 to 0.2, and mean FVC ranged from −1.86 to −0.63. There is a high prevalence of lung function impairment in children and adolescents living with HIV, which persists in the ART era. Further studies are needed of interventions that might improve lung function in these vulnerable populations.
Fabrication and magnetic properties of metal nanowires via AAO templates
Publisher: IEEE
Date: 2008
Clinical Utility of Bronchoalveolar Lavage in Pediatric Oncology Patients.
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 20-07-2022
DNA Methylation Profiles of Purified Cell Types in Bronchoalveolar Lavage: Applications for Mixed Cell Paediatric Pulmonary Studies
Publisher: Frontiers Media SA
Date: 22-12-2021
DOI: 10.3389/FIMMU.2021.788705
Abstract: In epigenome-wide association studies analysing DNA methylation from s les containing multiple cell types, it is essential to adjust the analysis for cell type composition. One well established strategy for achieving this is reference-based cell type deconvolution, which relies on knowledge of the DNA methylation profiles of purified constituent cell types. These are then used to estimate the cell type proportions of each s le, which can then be incorporated to adjust the association analysis. Bronchoalveolar lavage is commonly used to s le the lung in clinical practice and contains a mixture of different cell types that can vary in proportion across s les, affecting the overall methylation profile. A current barrier to the use of bronchoalveolar lavage in DNA methylation-based research is the lack of reference DNA methylation profiles for each of the constituent cell types, thus making reference-based cell composition estimation difficult. Herein, we use bronchoalveolar lavage s les collected from children with cystic fibrosis to define DNA methylation profiles for the four most common and clinically relevant cell types: alveolar macrophages, granulocytes, lymphocytes and alveolar epithelial cells. We then demonstrate the use of these methylation profiles in conjunction with an established reference-based methylation deconvolution method to estimate the cell type composition of two different tissue types a publicly available dataset derived from artificial blood-based cell mixtures and further bronchoalveolar lavage s les. The reference DNA methylation profiles developed in this work can be used for future reference-based cell type composition estimation of bronchoalveolar lavage. This will facilitate the use of this tissue in studies examining the role of DNA methylation in lung health and disease.
Single-Crystalline MFe2O4 Nanotubes/Nanorings Synthesized by Thermal Transformation Process for Biological Applications
Publisher: American Chemical Society (ACS)
Date: 27-08-2009
DOI: 10.1021/NN9006797
Abstract: We report a general thermal transformation approach to synthesize single-crystalline magnetic transition metal oxides nanotubes/nanorings including magnetite Fe(3)O(4), maghematite gamma-Fe(2)O(3), and ferrites MFe(2)O(4) (M = Co, Mn, Ni, Cu) using hematite alpha-Fe(2)O(3) nanotubes/nanorings template. While the straightforward reduction or reduction-oxides process was employed to produce Fe(3)O(4) and gamma-Fe(2)O(3), the alpha-Fe(2)O(3)/M(OH)(2) core/shell nanostructure was used as precursor to prepare MFe(2)O(4) nanotubes via MFe(2)O(4-x) (0 < x < 1) intermediate. The transformed ferrites nanocrystals retain the hollow structure and single-crystalline nature of the original templates. However, the crystallographic orientation-relationships of cubic spinel ferrites and trigonal hematite show strong correlation with their morpologies. The hollow-structured MFe(2)O(4) nanocrystals with tunable size, shape, and composition have exhibited unique magnetic properties. Moreover, they have been demonstrated as a highly effective peroxidase mimic catalysts for laboratory immunoassays or as a universal nanocapsules hybridized with luminescent QDs for magnetic separation and optical probe of lung cancer cells, suggesting that these biocompatible magnetic nanotubes/nanorings have great potential in biomedicine and biomagnetic applications.
COVID-19 and complicated bacterial pneumonia in children.
Publisher: European Respiratory Society (ERS)
Date: 2021
Water-Dispersible Spherically Hollow Clusters of Magnetic Nanoparticles
Publisher: American Chemical Society (ACS)
Date: 21-05-2009
DOI: 10.1021/CM900268Z
Origin of Long-Range Ferromagnetic Ordering in Metal–Organic Frameworks with Antiferromagnetic Dimeric-Cu(II) Building Units
Publisher: American Chemical Society (ACS)
Date: 05-10-2012
DOI: 10.1021/JA3077654
Abstract: Even though metal-organic frameworks (MOFs) derived from antiferromagnetic dimeric-Cu(II) building units and nonmagnetic molecular linkers are known to exhibit unexpected ferromagnetic behavior, a comprehensive understanding of the underlying mechanism remains elusive. Using a combined theoretical and experimental approach, here we reveal the origin of the long-range ferromagnetic coupling in a series of MOFs, constructed from antiferromagnetic dimeric-Cu(II) building blocks. Our studies show that the strong localization of copper vacancy states favors spontaneous spin polarization and formation of local moment. These copper vacancy-induced moments are coupled via the itinerant electrons in the conjugated aromatic linkers to establish a long-range ferromagnetic ordering. The proposed mechanism is supported by direct experimental evidence of copper vacancies and the magnetic hysteresis (M-H) loops.
Synthesis of FeS2 and FeS nanoparticles by high-energy mechanical milling and mechanochemical processing
Publisher: Elsevier BV
Date: 03-2005
Correlated d ferromagnetism and photoluminescence in undoped ZnO nanowires
Publisher: AIP Publishing
Date: 15-03-2010
DOI: 10.1063/1.3340930
Abstract: We report the correlated d0 ferromagnetism and photoluminescence in undoped single-crystalline ZnO nanowires synthesized by using a vapor transport method. We systematically tune the oxygen deficiency in the ZnO nanowires from 4% to 20% by adjusting the growth conditions, i.e., selecting different catalyst (Au or Ag) and varying the growth temperature. Our study suggests that oxygen vacancies induce characteristic photoluminescence and significantly boost the room-temperature ferromagnetism. Such undoped ZnO nanowires with tunable magnetic and optical properties are promising to find applications in multifunctional spintronic and photonic nanodevices.
Magnetic Properties of Highly-Ordered Ni, Co and Their Alloy Nanowires in AAO Templates
Publisher: Trans Tech Publications Ltd.
Date: 15-04-2006
Interventional bronchoscopy in children: Planning the path ahead
Publisher: Wiley
Date: 09-12-2019
DOI: 10.1002/PPUL.24596
Enhanced ferromagnetism in WS2 via defect engineering
Publisher: Elsevier BV
Date: 2019
Doping concentration dependence of microstructure and magnetic behaviours in Co-doped TiO2 nanorods
Publisher: Springer Science and Business Media LLC
Date: 12-2014
Abstract: Co-doped titanium dioxide (TiO 2 ) nanorods with different doping concentrations were fabricated by a molten salt method. It is found that the morphology of TiO 2 changes from nanorods to nanoparticles with increasing doping concentration. The mechanism for the structure and phase evolution is investigated in detail. Undoped TiO 2 nanorods show strong ferromagnetism at room temperature, whereas incorporating of Co deteriorates the ferromagnetic ordering. X-ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) results demonstrate that the ferromagnetism is associated with Ti vacancy.
High coercivity co-ferrite thin films on SiO2 (100) substrate prepared by sputtering and PLD
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2005
Ivacaftor, not ivacaftor/lumacaftor, is associated with lower pulmonary inflammation in preschool cystic fibrosis
Publisher: Cold Spring Harbor Laboratory
Date: 30-03-2022
DOI: 10.1101/2022.03.28.22273066
Abstract: Airway inflammation is a key driver of cystic fibrosis (CF) lung disease. The advent of cystic fibrosis transmembrane conductance regulator (CFTR) modulators has the potential to transform the care of CF, however the direct effect of these therapies on lung inflammation is unknown. Here, we profile airway inflammation in bronchoalveolar lavage (BAL) of preschool aged children with CF on CFTR modulator therapy (ivacaftor or ivacaftor/lumacaftor), untreated children with CF, and age-matched healthy controls. We show that children treated with ivacaftor have lower pulmonary concentrations of inflammatory mediators CCL3, CXCL9, CCL2, IL-8, IL-1β, and IL-6 relative to untreated children with CF. Conversely, there was no significant effect of lumacaftor/ivacaftor treatment on airway inflammation. This is the first work to illustrate a difference in early life airway inflammation with CFTR treatment, highlights the effectiveness of ivacaftor in early life, and suggests that BAL inflammatory profile may represent a biomarker of therapeutic response to treatment.
Aging Time Effect on the Formation of Alumina Nanowires on AAO Templates
Publisher: Informa UK Limited
Date: 03-09-2008
Ultrasmall Ferrite Nanoparticles Synthesized via Dynamic Simultaneous Thermal Decomposition for High-Performance and Multifunctional T1 Magnetic Resonance Imaging Contrast Age
Publisher: American Chemical Society (ACS)
Date: 06-04-2017
Abstract: Large-scale synthesis of monodisperse ultrasmall metal ferrite nanoparticles as well as understanding the correlations between chemical composition and MR signal enhancement is critical for developing next-generation, ultrasensitive T
Synthesis of Ferromagnetic Fe0.6 Mn0.4 O Nanoflowers as a New Class of Magnetic Theranostic Platform for In Vivo T1 -T2 Dual-Mode Magnetic Resonance Imaging and Magnetic Hyperthermia Therapy
Publisher: Wiley
Date: 14-06-2016
Abstract: Uniform wüstite Fe0.6 Mn0.4 O nanoflowers have been successfully developed as an innovative theranostic agent with T1 -T2 dual-mode magnetic resonance imaging (MRI), for diagnostic applications and therapeutic interventions via magnetic hyperthermia. Unlike their antiferromagnetic bulk counterpart, the obtained Fe0.6 Mn0.4 O nanoflowers show unique room-temperature ferromagnetic behavior, probably due to the presence of an exchange coupling effect. Combined with the flower-like morphology, ferromagnetic Fe0.6 Mn0.4 O nanoflowers are demonstrated to possess dual-modal MRI sensitivity, with longitudinal relaxivity r1 and transverse relaxivity r2 as high as 4.9 and 61.2 mm(-1) s(-1) [Fe]+[Mn], respectively. Further in vivo MRI carried out on the mouse orthotopic glioma model revealed gliomas are clearly delineated in both T1 - and T2 -weighted MR images, after administration of the Fe0.6 Mn0.4 O nanoflowers. In addition, the Fe0.6 Mn0.4 O nanoflowers also exhibit excellent magnetic induction heating effects. Both in vitro and in vivo magnetic hyperthermia experimentation has demonstrated that magnetic hyperthermia by using the innovative Fe0.6 Mn0.4 O nanoflowers can induce MCF-7 breast cancer cell apoptosis and a complete tumor regression without appreciable side effects. The results have demonstrated that the innovative Fe0.6 Mn0.4 O nanoflowers can be a new magnetic theranostic platform for in vivo T1 -T2 dual-mode MRI and magnetic thermotherapy, thereby achieving a one-stop diagnosis cum effective therapeutic modality in cancer management.
Gene modifiers of cystic fibrosis lung disease: A systematic review
Publisher: Wiley
Date: 29-05-2019
DOI: 10.1002/PPUL.24366
Abstract: Lung disease is the major source of morbidity and mortality in cystic fibrosis (CF), with large variability in severity between patients. Although accurate prediction of lung disease severity would be extremely useful, no robust methods exist. Twin and sibling studies have highlighted the importance of non-cystic fibrosis transmembrane conductance regulator (CFTR) genes in determining lung disease severity but how these impact on the severity in CF remains unclear. A systematic review was undertaken to answer the question "In patients with CF which non-CFTR genes modify the severity of lung disease?" The method for this systematic review was based upon the "Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA)" statement, with a narrative synthesis of results planned. A total of 1168 articles were screened for inclusion, with 275 articles undergoing detailed assessment for inclusion. One hundred and forty articles were included. Early studies focused on candidate genes, whereas more recent studies utilized genome-wide approaches and also examined epigenetic mechanisms, gene expression, and therapeutic response. A large body of evidence regarding non-CFTR gene modifiers of lung disease severity has been generated, examining a wide array of genes. Limitations to existing studies include heterogeneity in outcome measures used, limited replication, and relative lack of clinical impact. Future work examining non-CFTR gene modifiers will have to overcome these limitations if gene modifiers are to have a meaningful role in the care of patients with CF.
Optical and magnetic properties of Ni-doped ZnO nanocones
Publisher: American Scientific Publishers
Date: 10-2007
DOI: 10.1166/JNN.2007.807
Abstract: Ni-doped ZnO flower-like nanocones with wurzite structures were produced by oxidative evaporation of Zn and Ni powders. The Ni doping did not change the ZnO wurtzite structure. Raman scattering indicated that the normal lattice vibration modes are related to the hexagonal ZnO. Ni clusters and Ni oxides phases did not existed in the s le as characterized by XRD, XPS, and TEM. Upon excitations the nanocones could emit strong green light at 525 nm, which can be directly observed with a digital camera. The magnetic measurement indicated that the Ni-doped ZnO nanocone was high-Curie-temperature magnetic semiconductor.
XPS study of cobalt doped TiO2 films prepared by pulsed laser deposition
Publisher: Wiley
Date: 29-01-2014
DOI: 10.1002/SIA.5397
A high-resolution wave energy assessment of south-east Australia based on a 40-year hindcast
Publisher: Elsevier BV
Date: 10-2023
High coercivity Co-ferrite thin films on SiO2 (100) substrate
Publisher: Elsevier BV
Date: 11-2004
Reversible room-temperature ferromagnetism in Nb-doped SrTiO3
Publisher: American Physical Society (APS)
Date: 18-06-2013
Shape and Orientation Controlled Hydrothermal Synthesis of Silicide and Metal Dichalcogenide on a Silicon Substrate
Publisher: American Chemical Society (ACS)
Date: 31-03-2020
DNA methylation biomarkers of future health outcomes in children
Publisher: Springer Science and Business Media LLC
Date: 09-07-2020
DOI: 10.1186/S40348-020-00099-0
Abstract: Biomarkers which predict future health outcomes are key to the goals of precision health. Such biomarkers do not have to be involved in the causal pathway of a disease, and their performance is best assessed using statistical tests of clinical performance and evaluation of net health impact. DNA methylation is the most commonly studied epigenetic process and represents a potential biomarker of future health outcomes. We review 25 studies in non-oncological paediatric conditions where DNA methylation biomarkers of future health outcomes are assessed. Whilst a number of positive findings have been described, the body of evidence is severely limited by issues with outcome measures, tissue-specific s les, accounting for s le cell type heterogeneity, lack of appropriate statistical testing, small effect sizes, limited validation, and no assessment of net health impact. Future studies should concentrate on careful study design to overcome these issues, and integration of DNA methylation data with other ‘omic’, clinical, and environmental data to generate the most clinically useful biomarkers of paediatric disease.
Effect of annealing on the magnetic properties and performance of cold-drawn micro Ni80Fe20/Cu wires in magnetic sensors
Publisher: IOP Publishing
Date: 27-11-2007
Room temperature ferromagnetic ordering of NiO films through exchange coupling
Publisher: Elsevier BV
Date: 02-2015
Room-Temperature Ferromagnetism in Carbon-Doped ZnO
Publisher: American Physical Society (APS)
Date: 17-09-2007
Magnetic properties and magneto-impedance effect of CoNiFe/Cu composite wires by electroplating
Publisher: IOP Publishing
Date: 26-11-2007
Clinical utility of surveillance computed tomography scans in infants with cystic fibrosis
Publisher: Wiley
Date: 08-07-2018
DOI: 10.1002/PPUL.24132
Abstract: In cystic fibrosis (CF), irreversible lung disease arises in early life, and is often asymptomatic and unrecognised. Chest computed tomography (CT) scans have been used to detect asymptomatic lung disease in research however, the clinical utility of chest CT is unknown. This study aimed to determine the effect of surveillance CT in early life on the clinical management of patients with CF. Surveillance CT in early life changes the management of patients with CF. A medical record review of patients in the AREST-CF cohort who had chest CT at 1 and 3 years of age was performed. Information extracted included CT scan findings and the effect of CT results on clinical management. The chest CT scans and records of 50 subjects with CF were reviewed. The majority of CT scans (n = 75 75%) were abnormal. N = 31 (31%) of scans overall led to a direct change in management. The number of CT scans needed to be performed to lead to a treatment change was 3.2. The majority (n = 18, 58%) of changes in management were prompted by the finding of bronchiectasis. To the authors knowledge, this is the first study to highlight that early life surveillance CT frequently results in changes in clinical management, and hence may have a role beyond research and in routine care. If this can be shown to contribute to improved outcomes (such as reduced rates of bronchiectasis), then, as radiation doses diminish, chest CT could have an important clinical role.
Diffusion induced columnar structure, high perpendicular anisotropy and low transformation temperature in thick FePt films
Publisher: Elsevier BV
Date: 09-2010
Mutual Ferromagnetic-Ferroelectric Coupling in Multiferroic Copper-Doped ZnO
Publisher: Wiley
Date: 15-02-2011
The mechanism of Ag top layer on the coercivity enhancement of FePt thin films
Publisher: AIP Publishing
Date: 11-05-2005
DOI: 10.1063/1.1854332
Abstract: The magnetic properties of the FePt thin films with a Ag top layer prepared by magnetron sputtering have been studied. With 4nm Ag layer deposited right after the deposition of FePt layer, the ordering temperature of the L10 FePt phase decreased to 350°C or below. X-ray photoelectron spectroscopy results indicate that Ag has diffused into the FePt layer when Ag was deposited at 350°C, while Ag remains on the top of the FePt when Ag was deposited at room temperature. The Ag top layer deposited at 350°C was also found to protect the FePt layer from oxidation.
Tuning the Catalytic Preference of Ruthenium Catalysts for Nitrogen Reduction by Atomic Dispersion
Publisher: Wiley
Date: 12-11-2019
A toddler with a cough and wheeze refractory to treatment
Publisher: BMJ
Date: 03-04-2017
Substrate-dependent metabolomic signatures of myeloperoxidase activity in airway epithelial cells: Implications for early cystic fibrosis lung disease.
Publisher: Elsevier BV
Date: 09-2023
Electronic and magnetic properties of Co doped MoS2 monolayer
Publisher: Springer Science and Business Media LLC
Date: 07-04-2016
DOI: 10.1038/SREP24153
Abstract: First principle calculations are employed to calculate the electronic and magnetic properties of Co doped MoS 2 by considering a variety of defects including all the possible defect complexes. The results indicate that pristine MoS 2 is nonmagnetic. The materials with the existence of S vacancy or Mo vacancy alone are non-magnetic either. Further calculation demonstrates that Co substitution at Mo site leads to spin polarized state. Two substitutional Co Mo defects tend to cluster and result in the non-magnetic behaviour. However, the existence of Mo vacancies leads to uniform distribution of Co dopants and it is energy favourable with ferromagnetic coupling, resulting in an intrinsic diluted magnetic semiconductor.
Erasable and recreatable two-dimensional electron gas at the heterointerface of SrTiO3 and a water-dissolvable overlayer
Publisher: American Association for the Advancement of Science (AAAS)
Date: 02-08-2019
Abstract: The erasable and recreatable 2D electron gas at SrTiO 3 -based heterointerface paves the way towards future novel electronics.
Thermostable 1T‐MoS2 Nanosheets Achieved by Spontaneous Intercalation of Cu Single Atoms at Room Temperature and Their Enhanced HER Performance
Publisher: Wiley
Date: 27-04-2023
Abstract: A simple strategy to fabricate Cu single atoms (SAs) layer‐intercalated MoS 2 only by stirring Cu metals with MoS 2 nanosheets solution at room temperature is reported. An ultra‐high concentration (Cu: Mo = 98 at%) of Cu SAs is achieved and the intercalated Cu atoms strongly enhance the stability of the thermodynamically unstable 1T‐phase dominant MoS 2 . Notably, the as‐synthesized MoS 2 /Cu‐SAs exhibit a surprisingly high proportion of the metallic phase (64%) even after annealing at 800 °C in 5% H 2 /Ar foaming gas, indicating extraordinary thermostability of the Cu intercalated 1 T‐MoS 2 . In addition to, the as‐prepared MoS 2 /SAs exhibit outstanding catalytic performance owing to the improved electrical conductivity and the highly active unsaturated Cu SAs. This strategy is confirmed as a universal method for producing SAs of other metals and other 2D nanosheets can also be used as the host for SAs intercalation other than MoS 2 . This study may provide an effective strategy to fabricate facile and low‐cost SAs catalysts.
Gate-Controlled Magnetic Phase Transition in a van der Waals Magnet Fe5GeTe2
Publisher: American Chemical Society (ACS)
Date: 21-06-2021
A design of orthogonal fluxgate sensor
Publisher: AIP Publishing
Date: 15-04-2006
DOI: 10.1063/1.2172210
Abstract: A design of orthogonal fluxgate sensor is presented, in which the sensing element consists of multiple number of cores of soft ferromagnetic thin wires closely packed together. An orthogonal fluxgate sensor with the sensing element formed by a glass-coated amorphous wire of 16μm in diameter and another orthogonal fluxgate sensor with the sensing element formed by 16 closely packed glass-coated amorphous wires of 16μm in diameter were constructed and tested. In the tests, the excitation currents passing through the sensing elements for both sensors were set in such a way that each of the amorphous wires in the sensing elements was driven by a current of equal magnitude. The current excitation frequency for each sensing element was determined such that the sensor gave the maximum sensing output. The results showed that under the excitation current of optimum frequencies the sensitivity of the 16-core sensor was 65 times higher than that of the single-core sensor, in a trend of increasing exponentially against the increase of the number of cores in the sensing element.
Novel approaches to the prediction and diagnosis of pulmonary complications in the paediatric haematopoietic stem cell transplant patient.
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 18-10-2022
Superparamagnetic Silica Composite Nanospheres (SSCNs) with Ultrahigh Loading of Iron Oxide Nanoparticles via an Oil-in-DEG Microemulsion Route
Publisher: American Chemical Society (ACS)
Date: 10-2008
DOI: 10.1021/CM8012107
Room temperature ferromagnetism in N-doped rutile TiO2 films
Publisher: AIP Publishing
Date: 17-03-2011
DOI: 10.1063/1.3535427
Abstract: Room temperature ferromagnetism has been experimentally observed in TiO2:N films prepared by pulse laser deposition under N2O atmosphere. The ferromagnetism appears when the N2O partial pressure is higher than 10−5 Torr. XPS study has revealed that N substitutes O at the partial pressure of 10−5 Torr, whereas additional N atoms occupy interstitial sites besides substituting N at higher N2O partial pressures. Our study indicates that the origin of the ferromagnetism is the O substitution with N. Each substituted N has a magnetic moment of approximately 0.9 μB. The substitution of O also resulted in p-type behavior, accompanied with magnetoresistance and anomalous Hall effect.
Hierarchical carbon structures from soft drink for multi-functional energy applications of Li-ion battery, Na-ion battery and CO2 capture
Publisher: Elsevier BV
Date: 06-2023
Growth of highly textured manganese zinc ferrite films on glass substrates
Publisher: AIP Publishing
Date: 05-2010
DOI: 10.1063/1.3367964
Abstract: Highly textured manganese zinc ferrite (Mn0.7Zn0.3Fe2O4) films have been successfully fabricated on glass substrates by pulse laser deposition at relatively low temperatures. Investigations indicated that the strain, which is induced by high deposition rate and the difference of thermal coefficient between the film and glass substrate, is attributed to the growth of textured structure. Growth of highly textured cobalt ferrite film was also achieved using the same method. This work provided a possible technique for fabricating high quality ferrite films on glass substrates.
Co‐ and Nd‐Codoping‐Induced High Magnetization in Layered MoS2 Crystals
Publisher: Wiley
Date: 03-01-2023
Abstract: Magnetic 2D‐layered materials are promising for the applications of spintronic devices and compact magnetic devices. There are only a few reported intrinsic 2D‐based magnetic materials. Therefore, introducing magnetic element into 2D‐layered materials is an effective strategy to synthesize 2D‐layered magnetic materials. Recently, ferromagnetism has been realized by doping single transition‐metal or rare‐earth element, whereas, there is no report by codoping of both transition‐metal and rare‐earth elements. Herein, Co and Nd are codoped into MoS 2 ‐layered crystals by ion implantation. An extremely high magnetization of 6916.3 emu cm −3 at 10 K and 80.3 emu cm −3 at 300 K is achieved. The high magnetization is attributed to the contribution from both transition‐metal and rare‐earth elements as well as defects, such as vacancy of cation ions, anions, or interstitials. Hence, herein, a useful strategy may be opened to develop high‐performance magnetic materials based on 2D‐layered materials.
Pediatric Racemose Hemangioma Treated with Angiographic Embolization.
Publisher: American Thoracic Society
Date: 05-2020
Utility of Endobronchial Ultrasound in Assessment of Intrathoracic Lesions in Paediatric Patients
Publisher: S. Karger AG
Date: 2019
DOI: 10.1159/000501466
Abstract: b i Introduction: /i /b In adults, linear endobronchial ultrasound (EBUS) is the preferred modality to s le intrathoracic adenopathy and radial EBUS is a useful tool to biopsy peripheral pulmonary nodules. Utility in children is less well known. b i Objectives: /i /b The objective of this study was to review the EBUS experience of two specialist centres to better define the current role of EBUS in paediatric practice. b i Methods: /i /b A retrospective record review of EBUS procedures undertaken in patients aged 0–17 years at the Royal Children’s Hospital (Melbourne, Australia) and Thoraxklinik (Heidelberg, Germany) was performed. Data extracted included patient demographics, clinical presentation, bronchoscope (size and model), EBUS technique used, pathologic results, need for further invasive investigation, and complications. b i Results: /i /b Between 2008 and 2017, ten EBUS procedures were performed (6 linear EBUS and 4 radial EBUS). No complications were reported. Linear EBUS was performed on subjects who were between 4 and 15 years old, with a 100% diagnostic yield. Radial EBUS was non-diagnostic in three cases of non-malignant disease. In one case, it was used successfully for imaging alone. b i Conclusion: /i /b Both linear and radial EBUS are safe and feasible in children. Diagnostic yield of linear EBUS was 100%. Radial EBUS did not demonstrate utility, likely reflecting the pathologies of underlying parenchymal masses in paediatric populations.
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
Two-Dimensional Transition Metal Dichalcogenides and Their Charge Carrier Mobilities in Field-Effect Transistors
Publisher: Springer Science and Business Media LLC
Date: 16-08-2017
Minimal structural lung disease in early life represents significant pathology.
Publisher: Elsevier BV
Date: 11-2020
Spin-Momentum Locking Induced Anisotropic Magnetoresistance in Monolayer WTe2
Publisher: American Chemical Society (ACS)
Date: 25-10-2021
Ferromagnetism in Sm doped ZnO nanorods by a hydrothermal method
Publisher: Elsevier BV
Date: 04-2016
Pulmonary sarcoidosis in a preschool patient
Publisher: Wiley
Date: 26-06-2015
DOI: 10.1002/PPUL.23228
Abstract: Sarcoidosis is a rare disease, especially in the preschool age group where it usually presents with eye, joint, and skin involvement sparing the lungs. Multiple treatment regimes have been described with oral prednisolone being the usual first line treatment. We describe a case of a 4-year-old boy presenting with pulmonary sarcoidosis with no other organ involvement. The child was successfully managed with pulse intravenous methylprednisolone followed by oral prednisolone and has had a good outcome. This case reports a rare presentation of preschool sarcoidosis as well as the novel and successful use of pulse methylprednisolone in paediatric pulmonary sarcoidosis.
Is cardiorespiratory disease associated with increased susceptibility of SARS‐CoV‐2 in children?
Publisher: Wiley
Date: 02-09-2021
DOI: 10.1002/PPUL.25642
Abstract: There are limited data in pediatric populations evaluating whether chronic cardiorespiratory conditions are associated with increased risk of coronavirus disease 2019 (COVID‐19). We aimed to compare the rates of chronic cardiac and respiratory disease in children testing positive severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2[+]) compared with those testing negative (SARS‐CoV‐2[−]) at our institution. Prospective cohort with nested case–control study of all children tested by polymerase chain reaction (PCR) for SARS‐CoV‐2 by nasopharyngeal/oropharyngeal s ling between March and October 2020. Children were identified prospectively via laboratory notification with age and sex‐matching of SARS‐CoV‐2[+] to SARS‐CoV‐2[−] (1:2). Clinical data were extracted from the electronic medical record. In total, 179 SARS‐CoV‐2[+] children (44% females, median age 3.5 years, range: 0.1–19.0 years) were matched to 391 SARS‐CoV‐2[−] children (42% female, median age 3.7 years, range: 0.1–18.3 years). The commonest comorbidities showed similar frequencies in the SARS‐CoV‐2[+] and [−] groups: asthma ( n = 9, 5% vs. n = 17, 4.4%, p = 0.71), congenital heart disease ( n = 6, 3.4% vs. n = 7, 1.8%, p = 0.25) and obstructive sleep apnoea ( n = 4, 2.2% vs. n = 10, 2.3%, p = 0.82). In the SARS‐CoV‐2[+] group, the prevalence of symptomatic disease was similar among children with and without cardiorespiratory comorbidities ( n = 12, 75% vs. n = 103, 57%, p = 0.35). A high proportion of children hospitalized with SARS‐CoV‐2 infection had cardiac comorbidities (23.8%). In this single site data set, rates of pre‐existing cardiorespiratory disease were similar in SARS‐CoV‐2[+] and SARS‐CoV‐2[−] children. Rates of symptomatic infection were similar between children with and without cardiorespiratory comorbidity. High rates of comorbid cardiac disease were observed among hospitalized children with COVID‐19 warranting further research to inform vaccine prioritization.
Cu-Doped ZnO Nanoneedles and Nanonails: Morphological Evolution and Physical Properties
Publisher: American Chemical Society (ACS)
Date: 07-06-2008
DOI: 10.1021/JP710837H
Telehealth use in Australian cystic fibrosis centers: Clinician experiences
Publisher: Wiley
Date: 21-07-2023
DOI: 10.1002/PPUL.26612
Abstract: Telehealth has been rapidly adopted by cystic fibrosis (CF) centers and ongoing use in routine CF care is endorsed by CF consumers. However, data describing CF clinician perceptions regarding telehealth are scarce. We aimed to describe clinician experiences and attitudes towards telehealth in CF care among health professionals across Australia. CF multidisciplinary health professionals from all CF clinics in Australia were sent an anonymous electronic survey. Eighty‐five responses were received representing 15 of 23 (65%) centers. Most clinicians reported using telehealth for routine clinic visits, and a range of other clinical encounters (69.9%). Telehealth was widely perceived as acceptable (91.8%), and clinicians were comfortable/very comfortable (81.2%) integrating telehealth into future CF care. Despite this, 64.1% of respondents considered telehealth clinics to be much worse than face‐to‐face clinics and 57.5% reported quality of care was somewhat/much worse using telehealth. Home spirometry was available in 73.7% of centers, however, only 26.7% of clinics could provide spirometers for % eligible patients. Growth and microbiology assessments were often missed in telehealth clinics and 75.7% reported a technical issue had prevented a telehealth consultation from occurring. Telehealth for CF in Australia is considered feasible and acceptable by CF clinicians, although use of telehealth varies widely between centers. Concerns exist around the impact of telehealth on health outcomes, especially given core assessments are frequently omitted. Guidelines may help ensure the benefits of telehealth are realized for people with CF without compromising the standard of care.
Density functional theory study on the effects of oxygen groups on band gap tuning of graphitic carbon nitrides for possible photocatalytic applications
Publisher: Elsevier BV
Date: 07-2018
Multimodal single cell analysis of the paediatric lower airway reveals novel immune cell phenotypes in early life health and disease
Publisher: Cold Spring Harbor Laboratory
Date: 17-06-2022
DOI: 10.1101/2022.06.17.496207
Abstract: Inflammation is a key driver of cystic fibrosis (CF) lung disease, not addressed by current standard care. Improved understanding of the mechanisms leading to aberrant inflammation may assist the development of effective anti-inflammatory therapy. Single-cell RNA sequencing (scRNA-seq) allows profiling of cell composition and function at previously unprecedented resolution. Herein, we seek to use multimodal single-cell analysis to comprehensively define immune cell phenotypes, proportions and functional characteristics in preschool children with CF. We analyzed 42,658 cells from bronchoalveolar lavage of 11 preschool children with CF and a healthy control using scRNA-seq and parallel assessment of 154 cell surface proteins. Validation of cell types identified by scRNA-seq was achieved by assessment of s les by spectral flow cytometry. Analysis of transcriptome expression and cell surface protein expression, combined with functional pathway analysis, revealed 41 immune and epithelial cell populations in BAL. Spectral flow cytometry analysis of over 256,000 cells from a subset of the same patients revealed high correlation in major cell type proportions across the two technologies. Macrophages consisted of 13 functionally distinct sub populations, including previously undescribed populations enriched for markers of vesicle production and regulatory/repair functions. Other novel cell populations included CD4 T cells expressing inflammatory IFNα/β and NFκB signalling genes. Our work provides a comprehensive cellular analysis of the pediatric lower airway in preschool children with CF, reveals novel cell types and provides a reference for investigation of inflammation in early life CF.
High-Coercivity in alpha-Fe2O3 Formed After Annealing From Fe3O4 Nanoparticles
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2011
Carbon Nanoflakes and Nanotubes from Halloysite Nanoclays and their Superior Performance in CO2 Capture and Energy Storage
Publisher: American Chemical Society (ACS)
Date: 18-02-2020
MRI As Screening For Pulmonary Arteriovenous Malformations In Hereditary Haemorrhagic Telangiectasia.
Publisher: Wiley
Date: 08-02-2023
DOI: 10.1002/PPUL.26297
First principles prediction of materials for spintronics: From bulk to nano
Publisher: IEEE
Date: 10-2010
Strain Controlled Ferromagnetic-Antiferromagnetic Transformation in Mn-Doped Silicene for Information Transformation Devices
Publisher: American Chemical Society (ACS)
Date: 20-03-2017
DOI: 10.1021/ACS.JPCLETT.7B00115
Abstract: A reliable control of magnetic states is central to the use of magnetic nanostructures. Here, by using state-of-the-art density-functional theory calculations, we find that Mn atoms decorated silicene has an anomalously fixed magnetic moment and a high Curie temperature. In addition, a tunable magnetic exchange coupling is achieved for Mn-silicene system with the application of biaxial strain, which induces a transformation from the ferromagnetic (FM) to the antiferromagnetic (AFM) state. As such, an atomic "bit" could be obtained by superimposing strain field once the FM and AFM states are referred to as "1" and "0". Such piezospin nanodevices, which convert mechanical energy into magnetic moment, would offer great potential for future information transmission, as they ultimately combine small size, high-speed operation, and low-power consumption.
Robust Room-Temperature Ferromagnetism with Giant Anisotropy in Nd-Doped ZnO Nanowire Arrays
Publisher: American Chemical Society (ACS)
Date: 02-07-2012
DOI: 10.1021/NL301226K
Abstract: As an important class of spintronic material, ferromagnetic oxide semiconductors are characterized with both charge and spin degrees of freedom, but they often show weak magnetism and small coercivity, which limit their applications. In this work, we synthesized Nd-doped ZnO nanowire arrays which exhibit stable room temperature ferromagnetism with a large saturation magnetic moment of 4.1 μ(B)/Nd as well as a high coercivity of 780 Oe, indicating giant magnetic anisotropy. First-principles calculations reveal that the remarkable magnetic properties in Nd-doped ZnO nanowires can be ascribed to the intricate interplay between the spin moments and the Nd-derived orbital moments. Our complementary experimental and theoretical results suggest that these magnetic oxide nanowires obtained by the bottom-up synthesis are promising as nanoscale building blocks in spintronic devices.
Tailoring the coercivity in ferromagnetic ZnO thin films by 3d and 4f elements codoping
Publisher: AIP Publishing
Date: 06-01-2014
DOI: 10.1063/1.4861165
Engineering Magnetic Properties of Ni Nanoparticles by Non-Magnetic Cores
Publisher: American Chemical Society (ACS)
Date: 14-10-2009
DOI: 10.1021/CM902114D
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.
Exchange bias and magnetization process of Co/CoO nanocomposite thin films
Publisher: Elsevier BV
Date: 2005
Persistent pleuritic chest pain in a patient with cystic fibrosis
Publisher: European Respiratory Society (ERS)
Date: 06-2022
Modifiable factors associated with pediatric asthma readmissions: a multi-center linked cohort study.
Publisher: Informa UK Limited
Date: 24-06-2022
Mechanism of room temperature ferromagnetism in ZnO doped with Al
Publisher: AIP Publishing
Date: 03-02-2009
DOI: 10.1063/1.3056585
Abstract: ZnO recently receives extensive interest owing to its potential applications in the dilute magnetic semiconductor. In this work, Al was deposited onto the surface of ZnO film followed by high vacuum annealing. The film showed the room temperature ferromagnetism (RTF). The saturation magnetization (Ms) highly depends on both the thickness of the Al top layer and the thickness of the ZnO film. The RTF disappeared when the film was further annealed in air atmosphere. The detailed structure characterizations (x-ray diffraction and x-ray photoelectron spectroscopy) revealed that the RTF was associated with a charge transfer between Al and Zn.
Room temperature ferromagnetism of ZnO nanocrystals in amorphous ZnO- Al2 O3 matrix
Publisher: AIP Publishing
Date: 17-08-2009
DOI: 10.1063/1.3206654
Abstract: In this work, we demonstrate room temperature ferromagnetism of ZnO nanocrystals (NCs) embedded in alumina-based amorphous matrix. Our study has shown that solid solution occurred for lower Al concentration [≤x=0.09 for (Zn1−x,Alx)O]. No ferromagnetism appears in Al-doped ZnO with x≤0.09. With higher Al concentration, alumina-based amorphous structure appeared and fully amorphous was found in the composition of (Zn0.30,Al0.70)O. Ferromagnetism was found in (Zn1−x,Alx)O with a threshold of 16 mol % of Al. The room temperature ferromagnetism was found to be attributed to ZnO NCs in an alumina-based amorphous ZnO–Al2O3 matrix. Ferromagnetism reached a maximum with a volume percentage of ZnO NCs to be ∼27 vol %. The detailed investigations (transmission electron microscopy, x-ray photoelectron spectroscopy, and superconducting quantum interference device) show that the optimized size of these NCs is in the range of 4–5 nm. No ferromagnetism appears if the s le contains a fully amorphous structure.
Defects engineering induced room temperature ferromagnetism in transition metal doped MoS 2
Publisher: Elsevier BV
Date: 05-2017
Facile Fabrication of Water-Soluble Magnetic Nanoparticles and Their Spherical Aggregates
Publisher: American Chemical Society (ACS)
Date: 11-07-2007
DOI: 10.1021/CM070918Q
Defects Engineering Induced Ultrahigh Magnetization in Rare Earth Element Nd‐doped MoS 2
Publisher: Wiley
Date: 17-12-2020
Use of ultra-rapid whole-exome sequencing to diagnose congenital central hypoventilation syndrome.
Publisher: Wiley
Date: 14-02-2020
DOI: 10.1002/PPUL.24686
NiO thin film with an extremely high index $$(7 \overline{1 } 4)$$ on r-plane sapphire substrate
Publisher: Springer Science and Business Media LLC
Date: 05-09-2023
Magnetic Properties of Highly-Ordered Ni, Co and Their Alloy Nanowires in AAO Templates
Publisher: Trans Tech Publications, Ltd.
Date: 04-2006
DOI: 10.4028/WWW.SCIENTIFIC.NET/SSP.111.123
Abstract: We have fabricated metal/alumina hybrid materials by electrodepositon of metal nanowires into nanopores of anodic aluminum oxide templates. Single crystalline Ni and Co nanowires have been successfully fabricated. Structural characterization (XRD and HRTEM) shows that the single crystalline Ni nanowire has a preferred orientation along (220) direction. The preferred orientation of Co nanowire is along (100). These single crystalline Ni and Co nanowires have exhibited excellent magnetic properties. Their alloy nanowires have exhibited a large shift in hysteresis, probably due to the surface oxidation and exchange bias effect.
Fissure adjacent partial lobe atelectasis in primary ciliary dyskinesia
Publisher: Wiley
Date: 16-11-2021
DOI: 10.1111/JPC.15818
Abstract: Establishing the underlying cause in a child with chronic suppurative lung disease (CSLD) allows for targeted treatment and screening for associated complications. One cause of CSLD is primary ciliary dyskinesia (PCD). Testing for PCD requires specialist expertise which is not widely available. Computed tomography (CT) scans are commonly performed when assessing CSLD. Identifying PCD‐specific signs on CT would help clinicians in deciding when to refer for specialist testing. One potential PCD‐specific sign we have observed is fissure adjacent partial lobe atelectasis (FAPLA). We aimed to assess if FAPLA is commonly found in CT of PCD patients. Fifty‐eight CT scans from 42 adult and child PCD patients were analysed. The presence and distribution of FAPLA were noted, and its association to sputum culture and other signs commonly seen in CSLD (bronchiectasis, bronchial wall thickening, air trapping and mucus plugging). FAPLA was found in 13 of 40 participants in their earliest CT scan. The prevalence of FAPLA was similar in children and adults. FAPLA involved the right middle lobe in all 13 cases and was systematically associated with ≥1 other structural change. There was no association between FAPLA and bacterial isolation from sputum. FAPLA was found in 32.5% PCD scans, without difference between children and adults in terms of frequency. Future work will determine if it is a PCD‐specific sign by assessing whether it is also found in other CSLD processes and analysing more scans from children with PCD to determine how early this sign develops.
Ivacaftor, not ivacaftor/lumacaftor, associated with lower pulmonary inflammation in preschool cystic fibrosis.
Publisher: Wiley
Date: 12-07-2022
DOI: 10.1002/PPUL.26063
Structures and properties of transition-metal-doped TiO2 nanorods
Publisher: Elsevier BV
Date: 05-2016
High coercivity FePt thin films with Ag intermediate layers deposited at 400°C
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2005
Room temperature ferromagnetism at self-assembled monolayer modified Ag nanocluster–ZnO nanowire interface
Publisher: AIP Publishing
Date: 10-11-2008
DOI: 10.1063/1.3025853
Abstract: Magnetic characterization of ZnO nanowires (NW) decorated with thiol-capped Ag nanoclusters (NCs) reveals spontaneous field-dependent magnetization and hysteresis at room temperature. The saturation magnetization is temperature independent for the 13nm thiol-capped Ag NCs but unexpectedly increases with temperature for the 4nm thiol-capped Ag NCs. The high magnetic moment results from the efficient dispersal of Ag NCs on the ZnO NW scaffold and charge transfer interaction between Ag and ZnO. The anomalous magnetic behavior in 4nm NCs may be due to the spin reorientation of Ag–S dipoles mediated by Zn–S dipoles.
Synthesis of magnetite nanoparticles via a solvent-free thermal decomposition route
Publisher: Elsevier BV
Date: 05-2009
Quantum Dot Capped Magnetite Nanorings as High Performance Nanoprobe for Multiphoton Fluorescence and Magnetic Resonance Imaging
Publisher: American Chemical Society (ACS)
Date: 30-09-2010
DOI: 10.1021/JA103738T
Abstract: In the present study, quantum dot (QD) capped magnetite nanorings (NRs) with a high luminescence and magnetic vortex core have been successfully developed as a new class of magnetic-fluorescent nanoprobe. Through electrostatic interaction, cationic polyethylenimine (PEI) capped QD have been firmly graft into negatively charged magnetite NRs modified with citric acid on the surface. The obtained biocompatible multicolor QD capped magnetite NRs exhibit a much stronger magnetic resonance (MR) T2* effect where the r2* relaxivity and r2*/r1 ratio are 4 times and 110 times respectively larger than those of a commercial superparamagnetic iron oxide. The multiphoton fluorescence imaging and cell uptake of QD capped magnetite NRs are also demonstrated using MGH bladder cancer cells. In particular, these QD capped magnetite NRs can escape from endosomes and be released into the cytoplasm. The obtained results from these exploratory experiments suggest that the cell-penetrating QD capped magnetite NRs could be an excellent dual-modality nanoprobe for intracellular imaging and therapeutic applications. This work has shown great potential of the magnetic vortex core based multifunctional nanoparticle as a high performance nanoprobe for biomedical applications.
Magnetic and electric transport properties of Nd0.75Sr1.25Co1−xMnxO4
Publisher: AIP Publishing
Date: 15-12-2008
DOI: 10.1063/1.3046673
Abstract: We present the results of a systematic investigation of crystal structure, dc magnetization, ac susceptibility, resistivity, and magnetoresistance (MR) of Nd0.75Sr1.25Co1−xMnxO4 (0≤x≤0.3) polycrystals. All synthesized specimens are indexed in the same tetragonal space group I4/mmm with random occupation of Co and Mn ions at the identical site. The refinement result confirms the tetragonal distortion of the CoO6 octahedron with elongation along the c axis. The substitution of the Mn ions at Co site brings about the suppression of ferromagnetism as well as the enhancement of antiferromagnetism. The coexistence of ferromagnetic double exchange interactions and antiferromagnetic superexchange interactions and the suppression of ferromagnetism with increasing Mn doping are substantiated by the isothermal magnetization hysteresis loops. The result suggests that the substitution creates more antiferromagnetic bonds with superexchange interactions at the expense of the existing Co–O–Co bonds with ferromagnetic double exchange interactions. At low temperature, a crossover from ferromagnetic cluster-glass phase to spin-glass phase is shown in the dc and ac magnetic measurements. For all the specimens, the resistivity ρ(T) follows semiconducting behavior (dρ/dT& ) in the whole measured temperature region. The substitution induces an obvious increase in resistivity, which originates from the diminishing of ferromagnetic double exchange interactions and the localization of charge carriers caused by the disorder for the substitution. The system presents negative MR due to tunneling effect at low temperatures and positive MR at high-temperature range.
Engineering cationic defects in transparent tin oxide superlattices
Publisher: Elsevier BV
Date: 10-2018
Structure–Relaxivity Mechanism of an Ultrasmall Ferrite Nanoparticle T1 MR Contrast Agent: The Impact of Dopants Controlled Crystalline Core and Surface Disordered Shell
Publisher: American Chemical Society (ACS)
Date: 15-01-2021
Characteristics, management and changing incidence of children with empyema in a paediatric intensive care unit.
Publisher: Wiley
Date: 22-02-2022
DOI: 10.1111/JPC.15905
Abstract: Paediatric intensive care unit (PICU) admissions for empyema increased following the 13‐valent pneumococcal conjugate vaccine (PCV13). We describe the clinical characteristics, management and outcomes for children with empyema and compare incidence before and after PCV13. Retrospective study of patients years admitted to The Royal Children's Hospital Melbourne PICU with empyema between January 2016 and July 2019. We investigated the incidence of empyema during two time periods: 2007–2010 (pre‐PCV13) and 2016–2019 (post‐PCV13). Seventy‐one children (1.9% of all PICU admissions) were admitted to PICU with empyema between 2016 and 2019. Sixty‐one (86%) had unilateral disease, 11 (16%) presented with shock and 44 (62%) were ventilated. Streptococcus pneumoniae and group A Streptococcus were the most commonly identified pathogens. Forty‐five (63%) were managed with video‐assisted thoracoscopic surgery (VATS). There was a 31% reduction in empyema hospitalisations as a proportion of all hospitalisations (IRR 0.69, 95% CI 0.59–0.8), but a 2.8‐fold increase in empyema PICU admissions as a proportion of all PICU admissions (95% CI 2.2–3.5, P 0.001). For the PICU cohort, this was accompanied by reduction in PIM2 probability of death (median 1% vs. 1.9%, P = 0.02) and duration of intubation (median 69 h vs. 126.5 h, P = 0.045). In children with empyema in PICU 62% required ventilation, 16% had features of shock and 63% received VATS. Empyema admissions, as a proportion of all PICU admissions, increased in the era post‐PCV13 compared to pre‐PCV13 despite no increase in illness severity at admission.
Diffusion in annealing of nanocrystalline Ni80 Fe20 /Cu composite wires
Publisher: Inderscience Publishers
Date: 2012
Coating Engineering of MnFe2O4 Nanoparticles with Superhigh T2 Relaxivity and Efficient Cellular Uptake for Highly Sensitive Magnetic Resonance Imaging
Publisher: Wiley
Date: 24-01-2014
The effect of gait velocity on calcaneal balance at heel strike; Implications for orthotic prescription in injury prevention
Publisher: Elsevier BV
Date: 2010
DOI: 10.1016/J.GAITPOST.2009.08.003
Abstract: Exercise related lower limb injuries (ERLLI), are common in the recreational and competitive sporting population. Although ERLLI are thought to be multi-factorial in aetiology, one of the critical predisposing factors is known to gait abnormality. There is little published evidence comparing walking and running gait in the same subjects, and no evidence on the effect of gait velocity on calcaneal pronation, even though this may have implications for orthotic prescription and injury prevention. In this study, the walking and running gait of 50 physically active subjects was assessed using pressure plate analysis. The results show that rearfoot pronation occurs on foot contact in both running and walking gait, and that there is significantly more rearfoot pronation in walking gait (p<0.01). The difference in the magnitude of rearfoot pronation affected foot orthoses prescription. A 63% fall in computerized correction suggested by RSscan D3D software prescription was seen, based on running vs. walking gait. The findings of this study suggest that in the athletic population orthoses prescription should be based on dynamic assessment of running gait.
Advances in magnetic materials for microplastic separation and degradation
Publisher: No publisher found
Date: 2024
High coercivity and exchange coupling of Ni∕NiO nanocomposite film
Publisher: AIP Publishing
Date: 13-05-2005
DOI: 10.1063/1.1851424
Abstract: A coercivity of 2.4kOe was achieved at room temperature after magnetic annealing a pure Ni film at 650K for 20min under O2 partial pressure of 0.001torr. The interface structure of Ni∕NiO during the formation of NiO under magnetic field and the small grains may be responsible for the large coercivity. Additionally, the surface NiO, dipolar interaction of Ni particles, and the composition of NiO inside the film may affect the coercivity as well.
CONTEXT-DEPENDENT BIOLOGICAL CONTROL OF AN INVASIVE THISTLE
Publisher: Wiley
Date: 12-2005
DOI: 10.1890/05-0195
Room Temperature Ferromagnetism in (Zn1-x, Mg-x)O Film
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2010
The impact of telehealth based care on paediatric cystic fibrosis outcomes.
Publisher: Elsevier BV
Date: 07-2023
Positive magnetoresistance in ferromagnetic Nd-doped In2O3 thin films grown by pulse laser deposition
Publisher: AIP Publishing
Date: 19-05-2014
DOI: 10.1063/1.4879463
High-coercivity Co-ferrite thin films on (100)-SiO2 substrate
Publisher: AIP Publishing
Date: 04-2004
DOI: 10.1063/1.1695438
Abstract: Co-ferrite films were deposited on SiO2 single-crystal substrates. The as-deposited films were amorphous. The crystallization required an annealing at 700 °C or higher. Magnetic properties were found to be strongly dependent on annealing temperature, annealing duration, and film thickness. A small film thickness can restrict the formation of large particles. A coercivity as high as 9.3 kOe was achieved in the 50 nm film after annealing at 900 °C for 15 min deposited on (100)-SiO2 substrate. The high coercivity was associated with a nanostructure, lattice strain, and larger Raman shift with a relatively sharp peak.
Room temperature ferromagnetism in Teflon due to carbon dangling bonds
Publisher: Springer Science and Business Media LLC
Date: 06-03-2012
DOI: 10.1038/NCOMMS1689
Abstract: The ferromagnetism in many carbon nanostructures is attributed to carbon dangling bonds or vacancies. This provides opportunities to develop new functional materials, such as molecular and polymeric ferromagnets and organic spintronic materials, without magnetic elements (for ex le, 3d and 4f metals). Here we report the observation of room temperature ferromagnetism in Teflon tape (polytetrafluoroethylene) subjected to simple mechanical stretching, cutting or heating. First-principles calculations indicate that the room temperature ferromagnetism originates from carbon dangling bonds and strong ferromagnetic coupling between them. Room temperature ferromagnetism has also been successfully realized in another polymer, polyethylene, through cutting and stretching. Our findings suggest that ferromagnetism due to networks of carbon dangling bonds can arise in polymers and carbon-based molecular materials.
Effectiveness of asthma preventer dispensing for preventing childhood asthma readmissions: a multisite cohort linkage study.
Publisher: BMJ
Date: 26-04-2023
DOI: 10.1136/ARCHDISCHILD-2022-324549
Abstract: To (1) describe the dispensing of asthma preventers at hospital discharge and estimate its effect on hospital readmissions, and (2) estimate the effect of community asthma preventer dispensing on readmissions for the subgroup of children who were not prescribed an asthma preventer at discharge. Multisite cohort study with linked administrative data. Children aged 3–18 years admitted with asthma to a tertiary paediatric, mixed paediatric and adult, or regional hospital between 2017 and 2018. Hospital readmission for asthma within 12 months. Of the 767 participants, 201 (26.2%) were newly prescribed or requested to continue with asthma preventers. Of these, only 91 (45.3%) dispensed their discharge prescription within 3 days or had an active prescription. There was no evidence for a protective effect of discharge asthma preventer dispensing on asthma hospital readmissions within 12 months (OR 1.17, 95% CI 0.69 to 1.97, p=0.57). Of the 566 children who were not prescribed asthma preventers at discharge, 269 (47.5%) had one or more prescriptions dispensed in the community within 12 months. Participants who were in the protected period (asthma preventer dispensed) had reduced risk of an asthma hospital readmission (HR 0.61, 95% CI 0.36 to 1.02, p=0.06), including preschool children (HR 0.48, 95% CI 0.25, 0.93, p=0.03) on subgroup analysis. There was a low rate for prescribing and dispensing of hospital discharge asthma preventers and no protective effect was found for its impact on readmissions. A protective effect on readmissions was found for community asthma preventer dispensing.
Co/CoO Hybrid Film by Post Annealing
Publisher: Trans Tech Publications Ltd.
Date: 15-04-2006
Magnetic properties in α-MnO2 doped with alkaline elements
Publisher: Springer Science and Business Media LLC
Date: 13-03-2015
DOI: 10.1038/SREP09094
Abstract: α-MnO 2 nanotubes were fabricated using a hydrothermal technique. Li, Na and K ions were introduced into MnO 2 nanotubes to tailor their magnetic properties. It was found that with a doping concentration lower than 12 at%, the nanotubes showed ferromagnetic-like ordering at low temperature ( K), while antiferromagnetic coupling dominated their physical behavior with doping concentrations beyond 12 at%. Such experimental phenomenon was in very good agreement with associated first principle calculations. The ferromagnetic-like ordering originates from the breaking of equivalence between two different Mn-O octahedrals in α-MnO 2 due to the filling of alkaline ions in the tunnels. Both small charge transfer and lattice distortion play important roles in the ferromagnetic ordering.
Ferromagnetism in ZnO nanowires derived from electro-deposition on AAO template and subsequent oxidation
Publisher: Wiley
Date: 18-03-2008
Surface ferromagnetism in hydrogenated-ZnO film
Publisher: AIP Publishing
Date: 11-04-2011
DOI: 10.1063/1.3581046
Abstract: Nonmagnetic ZnO films were found to exhibit room temperature ferromagnetism after hydrogen annealing at elevated temperatures (100–500 °C), accompanied by (OH) bonds detection. The areal saturation magnetization Ms (∼1.1×10−5 emu cm−2) was insensitive to film thickness, suggesting surface magnetism. The attribution to OH bonds on surface was further supported when the ferromagnetism disappeared after a short immersion for 1 s in acid solution while ferromagnetism was relatively stable in basic environment. The alternative H2- and Ar-annealing can switch ferromagnetic “on” and “off” state, as the annealing under Ar atmosphere can reduce OH bond quantity significantly. First-principles calculations have further confirmed that OH-terminated ZnO surface belonging to the p31m two-dimensional space group has the lowest formation energy of −2.97 eV and a magnetic moment of 0.30 μB per OH due to unpaired magnetic moment of electrons occupying O 2p orbital. Insufficient surface OH concentration may result in antiferromagnetism and/or paramagnetism.
Defect-induced magnetism in undoped wide band gap oxides: Zinc vacancies in ZnO as an example
Publisher: AIP Publishing
Date: 06-2011
DOI: 10.1063/1.3609964
Abstract: To shed light on the mechanism responsible for the weak ferromagnetism in undoped wide band gap oxides, we carry out a comparative study on ZnO thin films prepared using both sol-gel and molecular beam epitaxy (MBE) methods. Compared with the MBE s les, the sol-gel derived s les show much stronger room temperature ferromagnetism with a magnetic signal persisting up to ∼740 K, and this ferromagnetic order coexists with a high density of defects in the form of zinc vacancies. The donor-acceptor pairs associated with the zinc vacancies also cause a characteristic orange-red photoluminescence in the sol-gel films. Furthermore, the strong correlation between the ferromagnetism and the zinc vacancies is confirmed by our first-principles density functional theory calculations, and electronic band alteration as a result of defect engineering is proposed to play the critical role in stabilizing the long-range ferromagnetism.
Single Cell Flow Cytometry Profiling of Bronchoalveolar Lavage in Children
Publisher: American Thoracic Society
Date: 08-2020
Synthesis of NiS and MnS Nanocrystals from the Molecular Precursors (TMEDA)M(SC{O}C6H5)2 (M = Ni, Mn)
Publisher: American Chemical Society (ACS)
Date: 20-11-2008
DOI: 10.1021/CG800536W
Cationic-vacancy-induced room-temperature ferromagnetism in transparent, conducting anatase Ti1-x Tax O2 (x ∼0.05) thin films
Publisher: The Royal Society
Date: 28-10-2012
Abstract: We report room-temperature ferromagnetism (FM) in highly conducting, transparent anatase Ti 1− x Ta x O 2 ( x ∼0.05) thin films grown by pulsed laser deposition on LaAlO 3 substrates. Rutherford backscattering spectrometry (RBS), X-ray diffraction, proton-induced X-ray emission, X-ray absorption spectroscopy (XAS) and time-of-flight secondary-ion mass spectrometry indicated negligible magnetic contaminants in the films. The presence of FM with concomitant large carrier densities was determined by a combination of superconducting quantum interference device magnetometry, electrical transport measurements, soft X-ray magnetic circular dichroism (SXMCD), XAS and optical magnetic circular dichroism, and was supported by first-principles calculations. SXMCD and XAS measurements revealed a 90 per cent contribution to FM from the Ti ions, and a 10 per cent contribution from the O ions. RBS/channelling measurements show complete Ta substitution in the Ti sites, though carrier activation was only 50 per cent at 5 per cent Ta concentration, implying compensation by cationic defects. The role of the Ti vacancy ( V Ti ) and Ti 3+ was studied via XAS and X-ray photoemission spectroscopy, respectively. It was found that, in films with strong FM, the V Ti signal was strong while the Ti 3+ signal was absent. We propose (in the absence of any obvious exchange mechanisms) that the localized magnetic moments, V Ti sites, are ferromagnetically ordered by itinerant carriers. Cationic-defect-induced magnetism is an alternative route to FM in wide-band-gap semiconducting oxides without any magnetic elements.
Recent Advances in Developing Hybrid Materials for Sodium-Ion Battery Anodes
Publisher: American Chemical Society (ACS)
Date: 18-05-2020
Formulation of superparamagnetic iron oxides by nanoparticles of biodegradable polymers for magnetic resonance imaging
Publisher: Wiley
Date: 24-01-2008
Microstructural evolution and its influence on the magnetic properties ofCoFe 2
Publisher:
American Physical Society (APS)
Date:
22-11-2006
Publisher: American Physical Society (APS)
Date: 22-11-2006
Magnetic Nanofibrous Hydrogels for Dynamic Control of Stem Cell Differentiation
Publisher: American Chemical Society (ACS)
Date: 29-08-2023
Intrinsic or Interface Clustering-Induced Ferromagnetism in Fe-Doped In2O3-Diluted Magnetic Semiconductors
Publisher: American Chemical Society (ACS)
Date: 12-06-2018
Abstract: Five percent Fe-doped In
Azithromycin for early Pseudomonas infection in cystic fibrosis: Do the benefits outweigh the harms?
Publisher: American Thoracic Society
Date: 15-11-2018
Exploring gaps and opportunities in primary care following an asthma hospital admission: a multisite mixed-methods study of three data sources.
Publisher: BMJ
Date: 04-01-2023
DOI: 10.1136/ARCHDISCHILD-2022-324114
Abstract: Explore gaps and opportunities in primary care for children following a hospital admission for asthma. Exploratory mixed-methods, using linked hospital and primary care administration data. Eligible children, aged 3–18 years, admitted to one of three hospitals in Victoria, Australia between 2017 and 2018 with a clinical diagnosis of asthma. 767 caregivers of eligible children participated, 39 caregivers completed a semistructured interview and 277 general practitioners (GPs) caring for 360 children completed a survey. Over 90% (n=706) of caregivers reported their child had a regular GP. However, few (14.1%, n=108) attended a GP in the 24 hours prior to index admission or in the 7 days after (35.8%, n=275). Children readmitted for asthma (34.2%, n=263), compared with those not readmitted (65.8%, n=504), were less likely to have visited a GP in the non-acute phase of their asthma in the 12 months after index admission (22.1% vs 42.1%, respectively), and their GP was more likely to report not knowing the child had an asthma admission (52.8% vs 39.2%, respectively). Fewer GPs reported being extremely confident managing children with poorly controlled asthma (11.9%, n=43) or post-discharge (16.7%, n=60), compared with children with well-controlled asthma (36.4%, n=131), with no difference by child readmission status. Given the exploratory design and descriptive approach, it is unknown if the differences by child readmission status have any causal relationship with readmission. Nonetheless, improving preventative patterns of primary care visits, timely communication between hospitals and primary care providers, and guideline concordant care by GPs are needed.
Large Exchange Bias after Zero-Field Cooling from an Unmagnetized State
Publisher: American Physical Society (APS)
Date: 17-02-2011
Size-dependent magnetism and spin-glass behavior of amorphous NiO bulk, clusters, and nanocrystals: Experiments and first-principles calculations
Publisher: American Physical Society (APS)
Date: 05-12-2007
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
Recent Advances in Functionalized Nanoporous Carbons Derived from Waste Resources and Their Applications in Energy and Environment
Publisher: Wiley
Date: 03-09-2020
Benchmarking single-cell hashtag oligo demultiplexing methods.
Publisher: Oxford University Press (OUP)
Date: 11-10-2023
Doping effect on magnetic and transport properties of Pr2−xSrxCoO4
Publisher: IOP Publishing
Date: 09-2008
Confinement-Induced Giant Spin–Orbit-Coupled Magnetic Moment of Co Nanoclusters in TiO2 Films
Publisher: American Chemical Society (ACS)
Date: 29-10-2019
Abstract: High magnetization materials are in great demand for the fabrication of advanced multifunctional magnetic devices. Notwithstanding this demand, the development of new materials with these attributes has been relatively slow. In this work, we propose a new strategy to achieve high magnetic moments above room temperature. Our material engineering approach invoked the embedding of magnetic nanoclusters in an oxide matrix. By precisely controlling pulsed laser deposition parameters, Co nanoclusters are formed in a 5 at % Co-TiO
Decades of dietary data demonstrate regional food web structures in the Southern Ocean
Publisher: Wiley
Date: 09-12-2021
DOI: 10.1002/ECE3.7017
Abstract: Understanding regional‐scale food web structure in the Southern Ocean is critical to informing fisheries management and assessments of climate change impacts on Southern Ocean ecosystems and ecosystem services. Historically, a large component of Southern Ocean ecosystem research has focused on Antarctic krill, which provide a short, highly efficient food chain, linking primary producers to higher trophic levels. Over the last 15 years, the presence of alternative energy pathways has been identified and hypotheses on their relative importance in different regions raised. Using the largest circumpolar dietary database ever compiled, we tested these hypotheses using an empirical circumpolar comparison of food webs across the four major regions/sectors of the Southern Ocean (defined as south of 40°S) within the austral summer period. We used network analyses and generalizations of taxonomic food web structure to confirm that while Antarctic krill are dominant as the mid‐trophic level for the Atlantic and East Pacific food webs (including the Scotia Arc and Western Antarctic Peninsula), mesopelagic fish and other krill species are dominant contributors to predator diets in the Indian and West Pacific regions (East Antarctica and the Ross Sea). We also highlight how tracking data and habitat modeling for mobile top predators in the Southern Ocean show that these species integrate food webs over large regional scales. Our study provides a quantitative assessment, based on field observations, of the degree of regional differentiation in Southern Ocean food webs and the relative importance of alternative energy pathways between regions.
Using stable isotope data to advance marine food web modelling
Publisher: Springer Science and Business Media LLC
Date: 25-01-2019
Fabrication, characterization and magnetic properties of Na-doped ZnO nanorods
Publisher: World Scientific Pub Co Pte Lt
Date: 06-2016
DOI: 10.1142/S1793604716500399
Abstract: Na-doped ZnO nanorods have been fabricated through a hydrothermal method. X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses indicate that the d spacing of ZnO increases with increasing doping concentration, suggesting the effective incorporation of dopant Na in the s les. Electron paramagnetic resonance (EPR) measurements indicate that there are shallow donors in pure ZnO s les and the shallow donors are strongly prohibited by Na doping. In addition, the resonance at g = 2.005 suggests the formation of Zn vacancies. Magnetic measurements indicate that pure ZnO is paramagnetic and Na doping leads to ferromagnetism at room temperature. Moreover, 0.5% Na-doped ZnO nanorods exhibits the largest saturation magnetization.
A review of treatments that improve cystic fibrosis transmembrane conductance regulator function
Publisher: SAGE Publications
Date: 2017
Dispersal and demography contributions to population spread ofCarduus nutansin its native and invaded ranges
Publisher: Wiley
Date: 07-2008
Ferromagnetism in Dilute Magnetic Semiconductors through Defect Engineering: Li-Doped ZnO
Publisher: American Physical Society (APS)
Date: 29-03-2010
Intrinsic ferromagnetism in Sm doped ZnO
Publisher: Elsevier BV
Date: 11-2006
Green emission in carbon doped ZnO films
Publisher: AIP Publishing
Date: 06-2014
DOI: 10.1063/1.4882172
Abstract: The emission behavior of C-doped ZnO films, which were prepared by implantation of carbon into ZnO films, is investigated. Orange/red emission is observed for the films with the thickness of 60–100 nm. However, the film with thickness of 200 nm shows strong green emission. Further investigations by annealing bulk ZnO single crystals under different environments, i.e. Ar, Zn or C vapor, indicated that the complex defects based on Zn interstitials are responsible for the strong green emission. The existence of complex defects was confirmed by electron spin resonance (ESR) and low temperature photoluminescence (PL) measurement.
Thiol-Capped ZnO Nanowire/Nanotube Arrays with Tunable Magnetic Properties at Room Temperature
Publisher: American Chemical Society (ACS)
Date: 22-12-2009
DOI: 10.1021/NN901353X
Abstract: The present study reports room-temperature ferromagnetic behaviors in three-dimensional (3D)-aligned thiol-capped single-crystalline ZnO nanowire (NW) and nanotube (NT) arrays as well as polycrystalline ZnO NT arrays. Besides the observation of height-dependent saturation magnetization, a much higher M(s) of 166 microemu cm(-2) has been found in NTs compared to NWs (36 microemu cm(-2)) due to larger surface area in ZnO NTs, indicating morphology-dependent magnetic properties in ZnO NW/NT systems. Density functional calculations have revealed that the origin of ferromagnetism is mainly attributed to spin-polarized 3p electrons in S sites and, therefore, has a strong correlation with Zn-S bond anisotropy. The preferential magnetization direction of both single-crystalline NTs and NWs lies perpendicular to the tube/wire axis due to the aligned high anisotropy orientation of the Zn-S bonds on the lateral (100) face of ZnO NWs and NTs. Polycrystalline ZnO NTs, however, exhibit a preferential magnetization direction parallel to the tube axis which is ascribed to shape anisotropy dominating the magnetic response. Our results demonstrate the interplay of morphology, dimensions, and crystallinity on spin alignment and magnetic anisotropy in a 3D semiconductor nanosystem with interfacial magnetism.
Electrostatic tuning of Kondo effect in a rare-earth-doped wide-band-gap oxide
Publisher: American Physical Society (APS)
Date: 29-04-2013
Structural and magnetic studies of Cu-doped ZnO films synthesized via a hydrothermal route
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C0JM01100B
Unique nanostructures in NiCo alloy nanowires
Publisher: Elsevier BV
Date: 05-2009
Anti‐Stoke effect induced enhanced photocatalytic hydrogen production
Publisher: Wiley
Date: 18-01-2023
Abstract: Photocatalytic hydrogen production via solar energy is considered one of the most strategic ways to produce renewable energy. However, expensive Pt is normally used as the cocatalyst during photocatalysis, which prevents commercialization. Therefore, extensive research has been performed to seek abundant and low‐cost alternative catalysts. In this work, MoS 2 quantum dots (QDs) synthesized by a hydrothermal method are incorporated with graphitic carbon nitride to form a heterostructure for photocatalytic hydrogen evolution. MoS 2 QDs/g‐C 3 N 4 heterostructure containing 5% and 10% MoS 2 QDs exhibited a high hydrogen production of 140 and 152 µmol h −1 g −1 , respectively, demonstrating the potential of MoS 2 as an effective economic cocatalyst. Detailed investigations indicate that incorporating MoS 2 QDs with carbon nitride to form heterostructure reduces the bandgap, suppresses the recombination, and enhances electron kinetic energy resulting from the anti‐Stoke effect, thus leading to better performance for hydrogen evolution.
Room temperature ferromagnetism and hopping conduction in Pt NCs/Al2O3 films
Publisher: AIP Publishing
Date: 04-2011
DOI: 10.1063/1.3562872
Abstract: In this work, Pt nanocrystals (NCs) were embedded into different oxide films by codeposition of Pt and oxide at 400 °C and 10−8 Torr using a pulse laser deposition system. Films of Pt (25 mol. %) NCs embedded in (Al2O3, ZnO, or SnO2) matrix showed room temperature ferromagnetism (RTFM), while Pt (25 mol. %) NCs/(MgO or SiO2) films were not magnetic. The detailed study of Pt NCs/Al2O3 films with different concentrations of Pt revealed that RTFM depended on Pt NC size and conductivity of the film. Resistance-temperature study of this film showed that the hopping conduction may be associated with RTFM.
Mapping Pulmonary and Systemic Inflammation in Preschool Aged Children With Cystic Fibrosis
Publisher: Frontiers Media SA
Date: 15-10-2021
DOI: 10.3389/FIMMU.2021.733217
Abstract: The immune landscape of the paediatric respiratory system remains largely uncharacterised and as a result, the mechanisms of globally important childhood respiratory diseases remain poorly understood. In this work, we used high parameter flow cytometry and inflammatory cytokine profiling to map the local [bronchoalveolar lavage (BAL)] and systemic (whole blood) immune response in preschool aged children with cystic fibrosis (CF) and aged-matched healthy controls. We demonstrate that children with CF show pulmonary infiltration of CD66b + granulocytes and increased levels of MIP-1α, MIG, MCP-1, IL-8, and IL-6 in BAL relative to healthy control children. Proportions of systemic neutrophils positively correlated with age in children with CF, whilst systemic CD4 T cells and B cells were inversely associated with age. Inflammatory cells in the BAL from both CF and healthy children expressed higher levels of activation and migration markers relative to their systemic counterparts. This work highlights the utility of multiplex immune profiling and advanced analytical pipelines to understand mechanisms of lung disease in childhood.
Effect of deposition methods on the magnetic properties of nanocrystalline permalloy
Publisher: Elsevier BV
Date: 2008
Supplementary Table from Pan-Cancer Analysis of Canonical and Modified miRNAs Enhances the Resolution of the Functional miRNAome in Cancer
Publisher: American Association for Cancer Research (AACR)
Date: 31-03-2023
DOI: 10.1158/0008-5472.22432097
Abstract: Supplementary Table from Pan-Cancer Analysis of Canonical and Modified miRNAs Enhances the Resolution of the Functional miRNAome in Cancer
Sustainable material selection with crisp and ambiguous data using single-valued neutrosophic-MEREC-MARCOS framework
Publisher: Elsevier BV
Date: 10-2022
Ferromagnetism and Crossover of Positive Magnetoresistance to Negative Magnetoresistance in Na-Doped ZnO
Publisher: American Chemical Society (ACS)
Date: 06-02-2015
DOI: 10.1021/CM504261Q
Advances in magnetic materials for microplastic separation and degradation
Publisher: Authorea, Inc.
Date: 14-06-2023
DOI: 10.22541/AU.168673633.39544801/V1
Abstract: The extensive utilization of plastics in modern human society has resulted in severe environmental pollution caused by microplastics (MP/MPs). The escalating consumption of plastics has led to pervasive presence of microplastics in aquatic environments, which not only carry toxic organic matter, transport toxic chemicals, but also spread through the food chain, seriously threatening marine life and human health. Therefore, various advanced strategies have been developed for separating and degrading MPs from water. Using magnetic materials and their nanostructures for targeting, adsorbing, transporting, and degrading MPs is a promising strategy. However, a comprehensive review of MP remediation using magnetic materials and their nanostructures is currently lacking. The present work aims to fill in the gap by providing a critical review of the recent advances in MP removal/degradation using magnetic materials. The primary focus is to compare and analyze MP’s removal efficiencies of different magnetic materials, including iron/ferrite nanoparticles, magnetic nanocomposites, and micromotors, aiming to unravel the underlying roles of magnetic materials in different types of MP degradation and present the general strategies for designing them to achieve optimal performance. Finally, the review outlines the forthcoming challenges and perspectives in the development of magnetic nanomaterials for MP remediation.
Effect of sputtered seed layer on electrodeposited NiFe/Cu composite wires
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2007
Ferromagnetism in two-dimensional materials via doping and defect engineering
Publisher: Elsevier
Date: 2020
As-needed budesonide-formoterol for adolescents with mild asthma: Importance of lung function
Publisher: Elsevier BV
Date: 11-2021
Community-acquired pneumonia in children: What to do when there is no response to standard empirical treatment?
Publisher: BMJ
Date: 08-08-2016
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.
Probing the magnetic profile of diluted magnetic semiconductors using polarized neutron reflectivity
Publisher: Springer Science and Business Media LLC
Date: 24-07-2017
DOI: 10.1038/S41598-017-06793-W
Abstract: Room temperature ferromagnetism has been observed in the Cu doped ZnO films deposited under an oxygen partial pressure of 10 −3 and 10 −5 torr on Pt (200 nm )/Ti (45 nm )/Si (001) substrates using pulsed laser deposition. Due to the deposition at relatively high temperature (873 K ), Cu and Ti atoms diffuse to the surface and interface, which significantly affects the magnetic properties. Depth sensitive polarized neutron reflectometry method provides the details of the composition and magnetization profiles and shows that an accumulation of Cu on the surface leads to an increase in the magnetization near the surface. Our results reveal that the presence of the copper at Zn sites induces ferromagnetism at room temperature, confirming intrinsic ferromagnetism.
Application of high dimensional flow cytometry and unsupervised analysis to define the immune cell landscape of early childhood respiratory and blood compartments
Publisher: Cold Spring Harbor Laboratory
Date: 22-03-2021
DOI: 10.1101/2021.03.21.436363
Abstract: The cellular landscape of the paediatric respiratory system remains largely uncharacterised and as a result, the mechanisms of highly prevalent childhood respiratory diseases remain poorly understood. A major limitation in defining mechanisms of disease has been the availability of tissue s les collected in early life, as well as technologies that permit deep immune analysis from limited s le volumes. In this work, we developed new experimental methods and applied unsupervised analytical tools to profile the local (bronchoalveolar lavage) and systemic (whole blood) immune response in childhood respiratory disease. We quantified and comprehensively phenotyped immune cell populations across blood and lung compartments in young children (under 6 years of age), showed that inflammatory cells in the BAL express higher levels of activation and migration markers relative to their systemic counterparts, and applied new analytical tools to reveal novel tissue-resident macrophage and infiltrating monocyte populations in the paediatric lung. To our knowledge, this is the first description of the use of these methods for paediatric respiratory s les. Combined with matched analysis of the systemic immune cell profile, the application of these pipelines will increase our understanding of childhood lung disease with potential to identify clinically relevant disease biomarkers.
Quality of inpatient care in public and private hospitals in Sri Lanka
Publisher: Oxford University Press (OUP)
Date: 03-2015
Abstract: To compare the quality of inpatient clinical care in public and private hospitals in Sri Lanka. A retrospective, cross-sectional comparison was done of inpatient quality, in a s le of 11 public and 10 private hospitals in three of 25 districts. Data were collected for 55 quality indicators from medical records of 2523 public and 1815 private inpatient admissions. These covered treatment of asthma, acute myocardial infarction (AMI), childbirth and five other conditions, along with outcome indicators, and medicine prescribing indicators. Overall quality scores were better in the public sector than the private sector (77 vs 69%). Performance was similar for management of AMI and childbirth and somewhat better in the private sector for management of asthma. The public sector performed better in those indicators that are not constrained by resources (94 vs 81%), but worse in indicators that are highly resource intensive (10 vs 31%). Quality was comparable in assessment and investigation, but the public sector performed better in treatment and management (70 vs 62%) and drug prescribing (68 vs 60%), and modestly worse in terms of outcomes (92 vs 97%). For a range of indicators where comparisons were possible, quality of inpatient clinical care in Sri Lanka was comparable to levels reported from upper-middle income Asian countries, and often approaches that in developed countries, although the findings cannot be generalized. Quality in the public sector is better than in the private sector in many areas, despite spending being substantially less. Quality in public hospitals is resource constrained, and needs greater government investment for improvement, but when resource limitations are not critical, the public sector appears able to deliver equal or better quality than the private sector. Overall similarities in quality between the two sectors suggest the importance of physician training and other factors.
Magnetic anisotropy and high coercivity of epitaxial Co-ferrite films prepared by pulsed laser deposition
Publisher: AIP Publishing
Date: 16-04-2007
DOI: 10.1063/1.2709763
Abstract: Co Fe 2 O 4 films with different thicknesses (40–200nm) were prepared on sapphire using pulsed laser deposition at different substrate temperatures. The films on (0001) sapphire showed a (111) epitaxial structure even at a low deposition temperature of 150°C. The coercivity up to 8.8kOe could be achieved in the 40nm film on sapphire deposited at 550°C. By comparison, the 33nm film on quartz possesses a nanocrystalline structure with the grain size below 20nm as well as a strong (111) preferential texture. The highest coercivity (12.5kOe) up to now was obtained in the 33nm Co-ferrite films. The study also revealed that high coercivity and large perpendicular anisotropy of these Co-ferrite thin films may be related to the textured structure and large residual strain.
Enhancement of room temperature ferromagnetism in C-doped ZnO films by nitrogen codoping
Publisher: AIP Publishing
Date: 08-04-2019
DOI: 10.1063/1.3073943
Abstract: The effect of nitrogen on the magnetic properties of C-doped ZnO has been investigated. It has been found that a low concentration of N doping does not lead to an apparent change of the magnetization in C-doped ZnO films. When N doping concentration exceeds 0.05 at. %, the magnetization of C–ZnO films increases significantly (more than 85%). The increased magnetization is mainly due to the enhanced moment of carbon, resulted from N doping. The successful fabrication of p-type diluted magnetic semiconductor may be of interest for spintronic applications.
Electronic phase separation at the LaAlO3/SrTiO3 interface
Publisher: Springer Science and Business Media LLC
Date: 08-02-2011
DOI: 10.1038/NCOMMS1192
Abstract: There are many electronic and magnetic properties exhibited by complex oxides. Electronic phase separation (EPS) is one of those, the presence of which can be linked to exotic behaviours, such as colossal magnetoresistance, metal-insulator transition and high-temperature superconductivity. A variety of new and unusual electronic phases at the interfaces between complex oxides, in particular between two non-magnetic insulators LaAlO(3) and SrTiO(3), have stimulated the oxide community. However, no EPS has been observed in this system despite a theoretical prediction. Here, we report an EPS state at the LaAlO(3)/SrTiO(3) interface, where the interface charges are separated into regions of a quasi-two-dimensional electron gas, a ferromagnetic phase, which persists above room temperature, and a (superconductor like) diamagnetic aramagnetic phase below 60 K. The EPS is due to the selective occupancy (in the form of 2D-nanoscopic metallic droplets) of interface sub-bands of the nearly degenerate Ti orbital in the SrTiO(3). The observation of this EPS demonstrates the electronic and magnetic phenomena that can emerge at the interface between complex oxides mediated by the Ti orbital.
MoS2 nanoflower incorporated with Au/Pt nanoparticles for highly efficient hydrogen evolution reaction
Publisher: Springer Science and Business Media LLC
Date: 15-01-2021
Transition Metal-Doped Tin Monoxide Monolayer: A First-Principles Study
Publisher: American Chemical Society (ACS)
Date: 13-02-2018
Structure and magnetic properties of K2NiFe3.5V3.5O16 with the hollandite structure
Publisher: Elsevier BV
Date: 05-2004
Thickness Dependence of Magnetic Behavior of LaAlO3 /SrTiO3 Heterostructures
Publisher: Wiley
Date: 09-05-2018
Stable vortex magnetite nanorings colloid: Micromagnetic simulation and experimental demonstration
Publisher: AIP Publishing
Date: 13-12-2012
DOI: 10.1063/1.3684963
Abstract: Magnetite nanoring with vortex domain structure may form stable magnetic colloid for biomedical applications due to its weak magnetic interaction without superparamagnetic (SPM) limitation. In the present study, we perform three-dimensional (3 D) Landau-Liftshitz-Gilbert (LLG) micromagnetics simulation for magnetite nanorings. The ground state phase diagram and stable vortex area (SVA) as a function of outer diameter (Dout), thickness (T), and inner to outer diameter ratios (β) within 100 nm are obtained. The influence of notch, eccentricity, and crystallographic orientation are taken carefully into consideration. In the SVA, the vortex state is not only the ground state but also the remanence state after in-plane is fully magnetized. In particular, the results suggest that a 20 nm inter-rings distance for a typical magnetite nanoring (Dout = 70 nm, T = 50 nm, and β = 0.6) can achieve the stable colloid based on vortex domain structure. Furthermore, these simulation results have been confirmed experimentally and demonstrated by using phosphorylated-mPEG modified magnetite nanorings. The optimization of magnetite nanorings from both simulation and experiments in this work pave the way to achieve such novel and stable vortex domain based magnetic suspension for various biomedical applications.
Colossal Magnetization and Giant Coercivity in Ion-Implanted (Nb and Co) MoS2 Crystals
Publisher: American Chemical Society (ACS)
Date: 16-12-2020
Manipulation of ferromagnetism in intrinsic two-dimensional magnetic and nonmagnetic materials
Publisher: Elsevier BV
Date: 12-2022
Synthesis of hierarchical Fe2O3/SnO2 hollow heterostructures and their improved photocatalytic properties
Publisher: Elsevier BV
Date: 12-2013
Nanoporous TiCN with High Specific Surface Area for Enhanced Hydrogen Evolution Reaction
Publisher: American Chemical Society (ACS)
Date: 12-04-2022
High Coercivity and Magnetization in WSe2 by Codoping Co and Nb
Publisher: Wiley
Date: 22-08-2019
Abstract: Introducing ferromagnetism in transition metal dichalcogenides has attracted lots of attention due to the possible applications in spintronics devices. Generally, single magnetic element doping is used to introduce magnetism. However, mostly, weak ferromagnetism is observed. In this work, codoping of two kinds of transition metals (Nb and Co) into WSe
Inducing ferromagnetism in ZnO through doping of nonmagnetic elements
Publisher: AIP Publishing
Date: 25-07-2022
DOI: 10.1063/1.2966360
Abstract: In this work, Zn, Al, Pt, Ag, and Au nonmagnetic metallic films were deposited on the surface of ZnO film, followed by high vacuum annealing at different temperatures. Results showed that (Zn,Al,Pt)∕ZnO films possessed room temperature ferromagnetism (RTF) after the vacuum annealing, while (Ag,Au)∕ZnO films did not. Our detailed structural investigations (transmission electron microscopy and x-ray photoelectron spectroscopy) revealed that this RTF was associated with the presence of metal clusters. The RTF disappeared in Al∕ZnO after a subsequent annealing in air, as metal clusters were oxidized. Pt∕ZnO remained ferromagnetic, as the metal cluster structure was stable subjected to the air annealing.
Realization of High Magnetization in Artificially Designed Ni/NiO Layers through Exchange Coupling
Publisher: Wiley
Date: 15-09-2023
Rare‐Earth Doped Iron Oxide Nanostructures for Cancer Theranostics: Magnetic Hyperthermia and Magnetic Resonance Imaging
Publisher: Wiley
Date: 07-12-2021
Abstract: Superparamagnetic iron oxide nanoparticles (SPIONs) have been extensively investigated during the last couple of decades because of their potential applications across various disciplines ranging from spintronics to nanotheranostics. However, pure iron oxide nanoparticles cannot meet the requirement for practical applications. Doping is considered as one of the most prominent and simplest techniques to achieve optimized multifunctional properties in nanomaterials. Doped iron oxides, particularly, rare‐earth (RE) doped nanostructures have shown much‐improved performance for a wide range of biomedical applications, including magnetic hyperthermia and magnetic resonance imaging (MRI), compared to pure iron oxide. Extensive investigations have revealed that bigger‐sized RE ions possessing high magnetic moment and strong spin‐orbit coupling can serve as promising dopants to significantly regulate the properties of iron oxides for advanced biomedical applications. This review provides a detailed investigation on the role of RE ions as primary dopants for engineering the structural and magnetic properties of Fe 3 O 4 nanoparticles to carefully introspect and correlate their impact on cancer theranostics with a special focus on magnetic hyperthermia and MRI. In addition, prospects for achieving high‐performance magnetic hyperthermia and MRI are thoroughly discussed. Finally, suggestions on future work in these two areas are also proposed.
Twist the doorknob to open the electronic properties of graphene-based van der Waals structure
Publisher: Elsevier BV
Date: 11-2021
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