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Articles 721 - 750 of 4868
Full-Text Articles in Physical Sciences and Mathematics
Case Study: A Model Based Systems Engineering (Mbse) Framework For Characterising Transportation Systems Over The Full Life Cycle, William R. Scott, Richard Fullalove, Gary Arabian, Allan P. Campbell
Case Study: A Model Based Systems Engineering (Mbse) Framework For Characterising Transportation Systems Over The Full Life Cycle, William R. Scott, Richard Fullalove, Gary Arabian, Allan P. Campbell
SMART Infrastructure Facility - Papers
Development of transport infrastructure has significant challenges including acquisition lag, phased evolution, multiple disparate stakeholders and environment-specific issues. The Asset Standards Authority (ASA) at TfNSW is introducing MBSE to address these challenges. Instrumental to the introduction is the development of a framework that structures the available data and provides guidance and traceability between the data sets. This framework combines the enterprise-level drivers with the lower level drivers such as standards to outline a generic conceptual design for a transport system. This conceptual design is then used to guide future system development. The outcome is future project information based on greater, …
A Distributed User-Centered Approach For Control In Ambient Robotic, Nicolas R. Verstaevel, Christine Regis, Marie-Pierre Gleizes, Fabrice Robert
A Distributed User-Centered Approach For Control In Ambient Robotic, Nicolas R. Verstaevel, Christine Regis, Marie-Pierre Gleizes, Fabrice Robert
SMART Infrastructure Facility - Papers
Designing a controller to supervise an ambient application is a complex task. Any change in the system composition or end-users needs involves re-performing the whole design process. Giving to each device the ability to self-adapt to both end-users and system dynamic is then an interesting challenge. This article contributes to this challenge by proposing an approach named Extreme Sensitive Robotic where the design is not guided by finality but by the functionalities provided. One functionality is then seen as an autonomous system, which can self-adapt to what it perceives from its environment (including human activity). We present ALEX, the first …
Higher Order Plasmonic Modes Excited In Ag Triangular Nanoplates By An Electron Beam, Vicki J. Keast, C J. Walhout, T Pedersen, N Shahcheraghi, Michael Cortie, David R. G Mitchell
Higher Order Plasmonic Modes Excited In Ag Triangular Nanoplates By An Electron Beam, Vicki J. Keast, C J. Walhout, T Pedersen, N Shahcheraghi, Michael Cortie, David R. G Mitchell
Australian Institute for Innovative Materials - Papers
Ag triangular nanoplates are known to generate strong plasmonic resonances when excited by both light and electron beams. Experimental electron energy-loss spectra (EELS) and maps were acquired using an aberration-corrected JEOL-ARM microscope. The corner, edge and centre modes that are often observed in such structures were also observed in these measurements. In addition, novel higher order internal modes were observed and were found to be well reproduced by theoretical cal- culations using boundary element method (BEM). These modes are "dark modes" so are not observed in the optical extinction spectra. They are confined surface propagating modes and are analogous to …
Vibration Effect On Magnetization And Critical Current Density Of Superconductors, Igor A. Golovchanskiy, Alexey V. Pan, Jonathan George, Frederick Wells, Sergey Fedoseev, Anatoly B. Rosenfeld
Vibration Effect On Magnetization And Critical Current Density Of Superconductors, Igor A. Golovchanskiy, Alexey V. Pan, Jonathan George, Frederick Wells, Sergey Fedoseev, Anatoly B. Rosenfeld
Australian Institute for Innovative Materials - Papers
In this work the effect of vibrations on critical current density ( Jc) of superconductors has been studied. The vibrations are shown to affect Jc of all types of superconductors during their measurements, employing a vibrating sample magnetometer (VSM). Increasing vibration frequency ( f ) and/or amplitude (A) leads to progressive reduction of Jc as a function of magnetic field (Ba). The effect of vibrations is substantially stronger in thin films. It leads to development of unexpected kinks on Jc (Ba) curves. Analysis of magnetization loops and relaxation of magnetization in YBCO films revealed that the vibration effect can be …
Superior Sodium-Ion Storage Performance Of Co3o4@Nitrogen-Doped Carbon: Derived From A Metal–Organic Framework, Ying Wang, Caiyun Wang, Yijing Wang, Hua-Kun Liu, Zhenguo Huang
Superior Sodium-Ion Storage Performance Of Co3o4@Nitrogen-Doped Carbon: Derived From A Metal–Organic Framework, Ying Wang, Caiyun Wang, Yijing Wang, Hua-Kun Liu, Zhenguo Huang
Australian Institute for Innovative Materials - Papers
Nitrogen-doped carbon coated Co 3 O 4 nanoparticles (Co 3 O 4 @NC) with high Na-ion storage capacity and unprecedented long-life cycling stability are reported in this paper. The Co 3 O 4 @NC was derived from a metal – organic framework ZIF-67, where the Co ions and organic linkers were, respectively, converted to Co 3 O 4 nanoparticle cores and nitrogen-doped carbon shells through a controlled two-step annealing process. The Co 3 O 4 @NC shows a porous nature with a surface area of 101 m 2 g 1 . When applied as an anode for sodium ion batteries …
Surface Effects Of Vapour-Liquid-Solid Driven Bi Surface Droplets Formed During Molecular-Beam-Epitaxy Of Gaasbi, Julian Steele, Roger A. Lewis, Josip Horvat, Mitchell John Bromley Nancarrow, M Henini, Yu. I. Mazur, M. Schmidbauer, M. E. Ware, S. Q. Yu, G J. Salamo
Surface Effects Of Vapour-Liquid-Solid Driven Bi Surface Droplets Formed During Molecular-Beam-Epitaxy Of Gaasbi, Julian Steele, Roger A. Lewis, Josip Horvat, Mitchell John Bromley Nancarrow, M Henini, Yu. I. Mazur, M. Schmidbauer, M. E. Ware, S. Q. Yu, G J. Salamo
Australian Institute for Innovative Materials - Papers
Herein we investigate a (001)-oriented GaAs1−xBix/GaAs structure possessing Bi surface droplets capable of catalysing the formation of nanostructures during Bi-rich growth, through the vapourliquid-solid mechanism. Specifically, self-aligned "nanotracks" are found to exist trailing the Bi droplets on the sample surface. Through cross-sectional high-resolution transmission electron microscopy the nanotracks are revealed to in fact be elevated above surface by the formation of a subsurface planar nanowire, a structure initiated mid-way through the molecular-beam-epitaxy growth and embedded into the epilayer, via epitaxial overgrowth. Electron microscopy studies also yield the morphological, structural, and chemical properties of the nanostructures. Through a combination of Bi …
Quasi-Freestanding Epitaxial Silicene On Ag(111) By Oxygen Intercalation, Yi Du, Jincheng Zhuang, Jiaou Wang, Zhi Li, Hongsheng Liu, Jijun Zhao, Xun Xu, Haifeng Feng, Lan Chen, Kehui Wu, Xiaolin Wang, S X. Dou
Quasi-Freestanding Epitaxial Silicene On Ag(111) By Oxygen Intercalation, Yi Du, Jincheng Zhuang, Jiaou Wang, Zhi Li, Hongsheng Liu, Jijun Zhao, Xun Xu, Haifeng Feng, Lan Chen, Kehui Wu, Xiaolin Wang, S X. Dou
Australian Institute for Innovative Materials - Papers
Silicene is a monolayer allotrope of silicon atoms arranged in a honeycomb structure with massless Dirac fermion characteristics similar to graphene. It merits development of silicon-based multifunctional nanoelectronic and spintronic devices operated at room temperature because of strong spin-orbit coupling. Nevertheless, until now, silicene could only be epitaxially grown on conductive substrates. The strong silicene-substrate interaction may depress its superior electronic properties. We report a quasi-freestanding silicene layer that has been successfully obtained through oxidization of bilayer silicene on the Ag(111) surface. The oxygen atoms intercalate into the underlayer of silicene, resulting in isolation of the top layer of silicene …
Cell Compatible Encapsulation Of Filaments Into 3d Hydrogels, Katharina Schirmer, Robert A. Gorkin Iii, Stephen T. Beirne, Elise M. Stewart, Brianna C. Thompson, Anita F. Quigley, Robert M. I Kapsa, Gordon G. Wallace
Cell Compatible Encapsulation Of Filaments Into 3d Hydrogels, Katharina Schirmer, Robert A. Gorkin Iii, Stephen T. Beirne, Elise M. Stewart, Brianna C. Thompson, Anita F. Quigley, Robert M. I Kapsa, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Tissue engineering scaffolds for nerve regeneration, or artificial nerve conduits, are particularly challenging due to the high level of complexity the structure of the nerve presents. The list of requirements for artificial nerve conduits is long and includes the ability to physically guide nerve growth using physical and chemical cues as well as electrical stimulation. Combining these characteristics into a conduit, while maintaining biocompatibility and biodegradability, has not been satisfactorily achieved by currently employed fabrication techniques. Here we present a method combining pultrusion and wet-spinning techniques facilitating incorporation of pre-formed filaments into ionically crosslinkable hydrogels. This new biofabrication technique allows …
Two-Dimensional Cobalt-/Nickel-Based Oxide Nanosheets For High-Performance Sodium And Lithium Storage, Dan Zhang, Wenping Sun, Zhihui Chen, Yu Zhang, Wenbin Luo, Yinzhu Jiang, Shi Xue Dou
Two-Dimensional Cobalt-/Nickel-Based Oxide Nanosheets For High-Performance Sodium And Lithium Storage, Dan Zhang, Wenping Sun, Zhihui Chen, Yu Zhang, Wenbin Luo, Yinzhu Jiang, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
Two-dimensional (2D) nanomaterials are one of the most promising types of candidates for energy-storage applications due to confined thicknesses and high surface areas, which would play an essential role in enhanced reaction kinetics. Herein, a universal process that can be extended for scale up is developed to synthesise ultrathin cobalt-/nickel-based hydroxides and oxides. The sodium and lithium storage capabilities of Co3O4 nanosheets are evaluated in detail. For sodium storage, the Co3O4 nanosheets exhibit excellent rate capability (e.g., 179 mA h g¿1 at 7.0 A g¿1 and 150 mA h g¿1 at 10.0 A g¿1) and promising cycling performance (404 mA …
Azimuthal Dependence Of The Garton-Tomkins Orbit In Crossed Magnetic And Electric Fields, Colin Bleasdale, Roger A. Lewis, A Bruno-Alfonso
Azimuthal Dependence Of The Garton-Tomkins Orbit In Crossed Magnetic And Electric Fields, Colin Bleasdale, Roger A. Lewis, A Bruno-Alfonso
Australian Institute for Innovative Materials - Papers
Work on classical closed orbits in the diamagnetic Kepler problem is predominately focused on the chaos observed in the polar launch angle as opposed to the azimuthal launch angle. This is due to atomic systems, along with widely studied external-field geometries (parallel magnetic and electric fields or pure magnetic field), being uniform in azimuthal angle, rendering the azimuthal angle unimportant. In the case of crossed magnetic and electric fields, this is no longer the case, and closed orbits do present an azimuthal launch angle dependence. In atomic systems, due to their spherical symmetry, the electric-field orientation in the plane perpendicular …
The Origin Of Ultrahigh Piezoelectricity In Relaxor-Ferroelectric Solid Solution Crystals, Fei Li, Shujun Zhang, Tiannan Yang, Zhuo Xu, Nan Zhang, Gang Liu, Jianjun Wang, Jian Li Wang, Zhenxiang Cheng, Zuo-Guang Ye, Jun Luo, Thomas R. Shrout, Long-Qing Chen
The Origin Of Ultrahigh Piezoelectricity In Relaxor-Ferroelectric Solid Solution Crystals, Fei Li, Shujun Zhang, Tiannan Yang, Zhuo Xu, Nan Zhang, Gang Liu, Jianjun Wang, Jian Li Wang, Zhenxiang Cheng, Zuo-Guang Ye, Jun Luo, Thomas R. Shrout, Long-Qing Chen
Australian Institute for Innovative Materials - Papers
The discovery of ultrahigh piezoelectricity in relaxor-ferroelectric solid solution single crystals is a breakthrough in ferroelectric materials. A key signature of relaxor-ferroelectric solid solutions is the existence of polar nanoregions, a nanoscale inhomogeneity, that coexist with normal ferroelectric domains. Despite two decades of extensive studies, the contribution of polar nanoregions to the underlying piezoelectric properties of relaxor ferroelectrics has yet to be established. Here we quantitatively characterize the contribution of polar nanoregions to the dielectric/piezoelectric responses of relaxor-ferroelectric crystals using a combination of cryogenic experiments and phase-field simulations. The contribution of polar nanoregions to the room-temperature dielectric and piezoelectric properties …
One-Step Bonding Of Ni Electrode To N-Type Pbte - A Step Towards Fabrication Of Thermoelectric Generators, Xavier Reales Ferreres, Sima Aminorroaya-Yamini, Mitchell John Bromley Nancarrow, C Zhang
One-Step Bonding Of Ni Electrode To N-Type Pbte - A Step Towards Fabrication Of Thermoelectric Generators, Xavier Reales Ferreres, Sima Aminorroaya-Yamini, Mitchell John Bromley Nancarrow, C Zhang
Australian Institute for Innovative Materials - Papers
PbTe-based thermoelectric materials are good candidates for harvesting waste heat at mid-range temperatures due to their high thermoelectric efficiencies. Excellent quality and reliability of the bonding between the thermoelectric material and the electrode at high temperatures are essential for manufacturing thermoelectric generators. Here, a technique has been developed to achieve high-quality bonding between PbTe and the electrode. We have successfully performed one-step sintering of nickel electrode to n-type PbTe powder using spark plasma sintering. The fabricated interphase, composed of nickel telluride, is continuous and homogeneous across the junction, without visible flaws on the electrode or in the interphase and PbTe. …
Symmetric Electrodes For Electrochemical Energy-Storage Devices, Lei Zhang, Shi Xue Dou, Hua-Kun Liu, Yunhui Huang, Xianluo Hu
Symmetric Electrodes For Electrochemical Energy-Storage Devices, Lei Zhang, Shi Xue Dou, Hua-Kun Liu, Yunhui Huang, Xianluo Hu
Australian Institute for Innovative Materials - Papers
Increasing environmental problems and energy challenges have so far attracted urgent demand for developing green and efficient energy-storage systems. Among various energy-storage technologies, sodium-ion batteries (SIBs), electrochemical capacitors (ECs) and especially the already commercialized lithium-ion batteries (LIBs) are playing very important roles in the portable electronic devices or the next-generation electric vehicles. Therefore, the research for finding new electrode materials with reduced cost, improved safety, and high-energy density in these energy storage systems has been an important way to satisfy the ever-growing demands. Symmetric electrodes have recently become a research focus because they employ the same active materials as both …
A Virtual Instrument To Standardise The Calibration Of Atomic Force Microscope Cantilevers, John E. Sader, Riccardo Borgani, Christopher T. Gibson, David B. Haviland, Michael J. Higgins, Jason I. Kilpatrick, Jianing Lu, Paul Mulvaney, Cameron J. Shearer, Ashley D. Slattery, Per-Anders Thorén, Jim Tran, Heyou Zhang, Tian Zheng
A Virtual Instrument To Standardise The Calibration Of Atomic Force Microscope Cantilevers, John E. Sader, Riccardo Borgani, Christopher T. Gibson, David B. Haviland, Michael J. Higgins, Jason I. Kilpatrick, Jianing Lu, Paul Mulvaney, Cameron J. Shearer, Ashley D. Slattery, Per-Anders Thorén, Jim Tran, Heyou Zhang, Tian Zheng
Australian Institute for Innovative Materials - Papers
Atomic force microscope (AFM) users often calibrate the spring constants of cantilevers using functionality built into individual instruments. This calibration is performed without reference to a global standard, hindering the robust comparison of force measurements reported by different laboratories. Here, we describe a virtual instrument (an internet-based initiative) whereby users from all laboratories can instantly and quantitatively compare their calibration measurements to those of others-standardising AFM force measurements-and simultaneously enabling non-invasive calibration of AFM cantilevers of any geometry. This global calibration initiative requires no additional instrumentation or data processing on the part of the user. It utilises a single website …
Observation Of Van Hove Singularities In Twisted Silicene Multilayers, Zhi Li, Jincheng Zhuang, Lan Chen, Zhenyi Ni, Chen Liu, Li Wang, Xun Xu, Jiaou Wang, Xiaodong Pi, Xiaolin Wang, Yi Du, Kehui Wu, Shi Xue Dou
Observation Of Van Hove Singularities In Twisted Silicene Multilayers, Zhi Li, Jincheng Zhuang, Lan Chen, Zhenyi Ni, Chen Liu, Li Wang, Xun Xu, Jiaou Wang, Xiaodong Pi, Xiaolin Wang, Yi Du, Kehui Wu, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
Interlayer interactions perturb the electronic structure of twodimensional materials and lead to new physical phenomena, such as van Hove singularities and Hofstadter's butterfly pattern. Silicene, the recently discovered two-dimensional form of silicon, is quite unique, in that silicon atoms adopt competing sp2 and sp3 hybridization states leading to a lowbuckled structure promising relatively strong interlayer interaction. In multilayer silicene, the stacking order provides an important yet rarely explored degree of freedom for tuning its electronic structures through manipulating interlayer coupling. Here, we report the emergence of van Hove singularities in the multilayer silicene created by an interlayer rotation. We demonstrate …
Ambient Synthesis Of One-/Two-Dimensional Cuagse Ternary Nanotubes As Counter Electrodes Of Quantum-Dot-Sensitized Solar Cells, Xin Qi Chen, Yang Bai, Zhen Li, Lian Zhou Wang, S X. Dou
Ambient Synthesis Of One-/Two-Dimensional Cuagse Ternary Nanotubes As Counter Electrodes Of Quantum-Dot-Sensitized Solar Cells, Xin Qi Chen, Yang Bai, Zhen Li, Lian Zhou Wang, S X. Dou
Australian Institute for Innovative Materials - Papers
2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. One-/two-dimensional ternary CuAgSe nanotubes (NTs) were successfully prepared from copper selenide (Cu2-xSe) NTs at room temperature within a short reaction time by the facile cation-exchange approach. Cation exchange leads to the transformation of the crystal structure from cubic into orthorhombic and/or tetragonal with good retention of morphology. The exchange reactions are spontaneous owing to large negative changes of the Gibbs free energy. The effects of parameters such as reaction time, precursor source, and precursor ratio on the exchange reaction were investigated. The resultant CuAgSe NTs were explored as counter electrodes (CEs) of …
Cationic Silicon Nanocrystals With Colloidal Stability, Ph-Independent Positive Surface Charge And Size Tunable Photoluminescence In The Near-Infrared To Red Spectral Range, Kenneth K. Chen, Kristine Liao, Gilberto Casillas, Yiying Li, Geoffrey A. Ozin
Cationic Silicon Nanocrystals With Colloidal Stability, Ph-Independent Positive Surface Charge And Size Tunable Photoluminescence In The Near-Infrared To Red Spectral Range, Kenneth K. Chen, Kristine Liao, Gilberto Casillas, Yiying Li, Geoffrey A. Ozin
Australian Institute for Innovative Materials - Papers
In this report, the synthesis of a novel class of cationic quaternary ammonium-surface-functionalized silicon nanocrystals (ncSi) using a novel and highly versatile terminal alkyl halide-surface-functionalized ncSi synthon is described. The distinctive features of these cationic ncSi include colloidal stability, pH-independent positive surface charge, and size-tunable photoluminescence (PL) in the biologically relevant near-infrared-to-red spectral region. These cationic ncSi are characterized via a combination of high-resolution scanning transmission electron microscopy with energy-dispersive X-ray analysis, Fourier transform infrared, X-ray photoelectron, and photoluminescence spectroscopies, and zeta potential measurements.
Self-Assembled 3d Foam-Like Nico2o4 As Efficient Catalyst For Lithium Oxygen Batteries, Lili Liu, Jun Wang, Yuyang Hou, Jun Chen, Hua-Kun Liu, Jiazhao Wang, Yu-Ping Wu
Self-Assembled 3d Foam-Like Nico2o4 As Efficient Catalyst For Lithium Oxygen Batteries, Lili Liu, Jun Wang, Yuyang Hou, Jun Chen, Hua-Kun Liu, Jiazhao Wang, Yu-Ping Wu
Australian Institute for Innovative Materials - Papers
A self-assembled 3D foam-like NiCo2O4 catalyst has been synthesized via a simple and environmental friendly approach, wherein starch acts as the template to form the unique 3D architecture. Interestingly, when employed as a cathode for lithium oxygen batteries, it demonstrates superior bifunctional electrocatalytic activities toward both the oxygen reduction reaction and the oxygen evolution reaction, with a relatively high round-trip efficiency of 70% and high discharge capacity of 10 137 mAh g-1 at a current density of 200 mA g-1, which is much higher than those in previously reported results. Meanwhile, rotating disk electrode measurements in both aqueous and nonaqueous …
Electric-Field Effects On The Closed Orbits Of The Diamagnetic Kepler Problem, Colin Bleasdale, A Bruno-Alfonso, Roger A. Lewis
Electric-Field Effects On The Closed Orbits Of The Diamagnetic Kepler Problem, Colin Bleasdale, A Bruno-Alfonso, Roger A. Lewis
Australian Institute for Innovative Materials - Papers
The nonrelativistic closed orbits of an electron interacting with a unit positive charge in the presence of homogeneous magnetic and electric fields are investigated. A simplified theoretical model is proposed utilizing appropriate initial conditions in semiparabolic coordinates for arbitrary magnetic-and electric-field alignments. The evolution of both the angular spectrum of orbits and the shape and duration of individual orbits, as the electric-field intensity and scaled energy are increased, is shown for the cases of both parallel and crossed fields. Orbit mixing in the high-field regime is investigated in the case of parallel fields, giving an indication of the system moving …
Fabrication And Characterisation Of Gaas Nanopillars Using Nanosphere Lithography And Metal Assisted Chemical Etching, A Cowley, J A. Steele, D Byrne, R K. Vijayaraghavan, P J. Mcnally
Fabrication And Characterisation Of Gaas Nanopillars Using Nanosphere Lithography And Metal Assisted Chemical Etching, A Cowley, J A. Steele, D Byrne, R K. Vijayaraghavan, P J. Mcnally
Australian Institute for Innovative Materials - Papers
We present a low-cost fabrication procedure for the production of nanoscale periodic GaAs nanopillar arrays, using the nanosphere lithography technique as a templating mechanism and the electrochemical metal assisted etch process (MacEtch). The room-temperature photoluminescence (PL) and Raman spectroscopic properties of the fabricated pillars are detailed, as are the structural properties (scanning electron microscopy) and fabrication process. From our PL measurements, we observe a singular GaAs emission at 1.43 eV with no indications of any blue or green emissions, but with a slight redshift due to porosity induced by the MacEtch process and characteristic of porous GaAs (p-GaAs). This is …
Bio-Inspired, Moisture-Powered Hybrid Carbon Nanotube Yarn Muscles, Shi Hyeong Kim, Cheong Hoon Kwon, Karam Park, Tae Jin Mun, Xavier Lepro, Ray H. Baughman, Geoffrey M. Spinks, Seon Jeong Kim
Bio-Inspired, Moisture-Powered Hybrid Carbon Nanotube Yarn Muscles, Shi Hyeong Kim, Cheong Hoon Kwon, Karam Park, Tae Jin Mun, Xavier Lepro, Ray H. Baughman, Geoffrey M. Spinks, Seon Jeong Kim
Australian Institute for Innovative Materials - Papers
Hygromorph artificial muscles are attractive as self-powered actuators driven by moisture from the ambient environment. Previously reported hygromorph muscles have been largely limited to bending or torsional motions or as tensile actuators with low work and energy densities. Herein, we developed a hybrid yarn artificial muscle with a unique coiled and wrinkled structure, which can be actuated by either changing relative humidity or contact with water. The muscle provides a large tensile stroke (up to 78%) and a high maximum gravimetric work capacity during contraction (2.17 kJ kg−1), which is over 50 times that of the same weight human muscle …
Study Of Flux Pinning Mechanism Under Hydrostatic Pressure In Optimally Doped (Ba,K)Fe2as2 Single Crystals, Babar Shabbir, Xiaolin Wang, Yanwei Ma, S X. Dou, Shi-Shen Yan, Liang-Mo Mei
Study Of Flux Pinning Mechanism Under Hydrostatic Pressure In Optimally Doped (Ba,K)Fe2as2 Single Crystals, Babar Shabbir, Xiaolin Wang, Yanwei Ma, S X. Dou, Shi-Shen Yan, Liang-Mo Mei
Australian Institute for Innovative Materials - Papers
Strong pinning depends on the pinning force strength and number density of effective defects. Using the hydrostatic pressure method, we demonstrate here that hydrostatic pressure of 1.2 GPa can significantly enhance flux pinning or the critical current density (Jc) of optimally doped Ba0.6K0.4Fe2As2 crystals by a factor of up to 5 in both low and high fields, which is generally rare with other Jc enhancement techniques. At 4.1 K, high pressure can significantly enhance Jc from 5 x 105 A/cm2 to nearly 106 A/cm2 at 2 T, and from 2 x 105 A/cm2 to nearly 5.5 x 105 A/cm2 at …
Toward Biodegradable Mg-Air Bioelectric Batteries Composed Of Silk Fibroin-Polypyrrole Film, Xiaoteng Jia, Caiyun Wang, Chen Zhao, Yu Ge, Gordon G. Wallace
Toward Biodegradable Mg-Air Bioelectric Batteries Composed Of Silk Fibroin-Polypyrrole Film, Xiaoteng Jia, Caiyun Wang, Chen Zhao, Yu Ge, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Biodegradable active implantable devices can be used to diagnose and/or treat disease and eventually disappear without surgical removal. If an "external" energy source is required for effective operation then a biocompatible and biodegradable battery would be ideal. In this study, a partially biodegradable Mg-air bioelectric battery (biobattery) is demonstrated using a silk fibroin-polypyrrole (SF-PPy) film cathode coupled with bioresorbable Mg alloy anode in phosphate buffered saline (PBS) electrolyte. PPy is chemically coated onto one side of the silk substrate. SF-PPy film shows a conductivity of ≈1.1 S cm−1 and a mild catalytic activity toward oxygen reduction. It degrades in a …
Effective Area And Charge Density Of Chondroitin Sulphate Doped Pedot Modified Electrodes, Alexander R. Harris, Paul J. Molino, Antonio G. Paolini, Gordon G. Wallace
Effective Area And Charge Density Of Chondroitin Sulphate Doped Pedot Modified Electrodes, Alexander R. Harris, Paul J. Molino, Antonio G. Paolini, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Neural electrodes have been coated with electrodeposited poly-3,4-ethylenedioxythiophene doped with chondroitin sulphate. Optical and electrochemical methods were used to determine the effective electrode area, charge injection capacity and charge density of the modified electrodes. Deposition times of 15 to 60 s slightly increased the geometric and steady state diffusion electroactive areas while the linear diffusion electroactive area grew significantly, indicating an increase in electrode roughness. The effective electrode area and charge injection capacity were significantly smaller than PEDOT doped with previously tested dopants. In contrast to other dopant ions, the charge density determined from the geometric and steady state diffusion …
Enhanced Magnetism In Field-Cooled [Ni80fe20/Mn]3 Multilayers Studied Using Polarized Neutron Reflectometry, W Uilhoorn, S J. Callori, David L. Cortie, Hui-Chia Su, Y Khaydukov, Ko-Wei Lin, Frank Klose
Enhanced Magnetism In Field-Cooled [Ni80fe20/Mn]3 Multilayers Studied Using Polarized Neutron Reflectometry, W Uilhoorn, S J. Callori, David L. Cortie, Hui-Chia Su, Y Khaydukov, Ko-Wei Lin, Frank Klose
Australian Institute for Innovative Materials - Papers
Here, the interfacial magnetic coupling in an exchange biased [Ni80Fe20/Mn]3 multilayer system has been studied using polarized neutron re ectometry. Previous results on this system indicate the importance of the coupling between the Fe-Mn and Ni-Mn orbitals at the layer interfaces. Magnetic depth profiles of the multilayer were measured at low temperatures under field-cooled and zero-field-cooled conditions. While no definitive interfacial state was found, a magnetic moment enhancement of roughly 20-30% in the applied field direction was observed throughout the bulk of the NiFe layers in the field-cooled state as compared to the zero-field-cooled measurements. The origin of this enhancement …
A Methodical Approach For Fabrication Of Binder-Free Li2s-C Composite Cathode With High Loading Of Active Material For Li-S Battery, Mohammad Kaiser, Xin Liang, Hua-Kun Liu, S X. Dou, Jiazhao Wang
A Methodical Approach For Fabrication Of Binder-Free Li2s-C Composite Cathode With High Loading Of Active Material For Li-S Battery, Mohammad Kaiser, Xin Liang, Hua-Kun Liu, S X. Dou, Jiazhao Wang
Australian Institute for Innovative Materials - Papers
Lithium sulfide (Li2S), which has a theoretical capacity of 1166 mA h/g, is considered as a promising cathode material for the Li-S battery. The electrochemical performance of microsized Li2S is impaired, however, by its low electrical conductivity as well as first cycle high activation potential problem. In this work, microsized Li2S powder had been ball-milled with different carbon sources to synthesize Li2S-C composites as well as to find the suitable carbon sources, which were then capillary-deposited in three-dimensional multi-layered Ni foam from a dioxolane-containing mixture to fabricate a binder-free Li2S-C composite cathode. A large amount of active material (∼5 mg/cm2) …
3d Binder-Free Mose2 Nanosheets/Carbon Cloth Electrodes For Efficient And Stable Hydrogen Evolution Prepared By Simple Electrophoresis Deposition Strategy, Yundan Liu, Long Ren, Zhen Zhang, Xiang Qi, Hongxing Li, Jianxin Zhong
3d Binder-Free Mose2 Nanosheets/Carbon Cloth Electrodes For Efficient And Stable Hydrogen Evolution Prepared By Simple Electrophoresis Deposition Strategy, Yundan Liu, Long Ren, Zhen Zhang, Xiang Qi, Hongxing Li, Jianxin Zhong
Australian Institute for Innovative Materials - Papers
We successfully developed a simple electrophoretic deposition (EPD) method to decorate the MoSe2 nanosheets on the carbon fiber surface of carbon cloth (MoSe2/CC). With this process, MoSe2 nanosheets can be uniformly and tightly deposited on this flexible conductor to form a 3D binder-free electrode for hydrogen evolution reaction (HER). The film thickness can also be controlled by the EPD time. Directly used as binder-free electrodes for hydrogen evolution reaction, the as-prepared 3D MoSe2/CC samples exhibit excellent catalytic activity in an acidic electrolyte (21 mA/cm2 at an over-potential of 250 mV). Variation of MoSe2 nanosheets film thickness in the electrodes could …
Brain On A Bench Top, Rodrigo Lozano, Leo Stevens, Brianna C. Thompson, Kerry J. Gilmore, Robert A. Gorkin Iii, Elise M. Stewart, Marc In Het Panhuis, Mario I. Romero-Ortega, Gordon G. Wallace
Brain On A Bench Top, Rodrigo Lozano, Leo Stevens, Brianna C. Thompson, Kerry J. Gilmore, Robert A. Gorkin Iii, Elise M. Stewart, Marc In Het Panhuis, Mario I. Romero-Ortega, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Tissue grafting and organ transplantation are common techniques in modern medicine, but suffer from the widely-reported limitations of constrained supply and the risk of rejection, necessitating a lifetime of immunosuppressant medication [1]. The field of tissue engineering has advanced markedly over the last decade, and engineered tissues are under development for both regenerative medicine applications as well as the formation of accurate in vitro models for the study of fundamental tissue behaviours, disease states and drug discovery. Both biological and synthetic materials have been formed into cell-supporting tissue scaffolds [2,3]. In broad terms, biological materials and particularly extracellular matrix (ECM) …
Characteristics And Cadmium Extraction Performance Of Pvc/Aliquat 336 Electrospun Fibres In Comparison With Polymer Inclusion Membranes, Nurul Syazana Binti Abdul Halim, Philip G. Whitten, Long D. Nghiem
Characteristics And Cadmium Extraction Performance Of Pvc/Aliquat 336 Electrospun Fibres In Comparison With Polymer Inclusion Membranes, Nurul Syazana Binti Abdul Halim, Philip G. Whitten, Long D. Nghiem
Australian Institute for Innovative Materials - Papers
Electrospun fibres and polymer inclusion membranes (PIMs) were prepared from polyvinyl chloride (PVC) and Aliquat 336. Morphological and thermomechanical properties of the electrospun mats differed notably from those of PIMs. The plasticizing effect of Aliquat 336 on electrospun PVC/Aliquat 336 fibres was confirmed by the shifting of the glass transition temperature (Tg). By contrast, Aliquat 336 did not act as a plasticizer in PIMs as Tg was independent of Aliquat 336 concentration. Cadmium extraction to electrospun fibres could occur at a lower Aliquat 336 content (i.e. 6 wt.%) compared with PIMs. At 40 wt.% Aliquat 336 content, both PIMs and …
The Study Of Deposition Of Wood Extractives And Model Compound Colloids Onto Chromium And Cellulose Surfaces Using Quartz Crystal Microbalance With Dissipation (Qcm-D), Yuen Y. Tham, Paul J. Molino, Michael J. Higgins, Karen R. Stack, Desmond E. Richardson, Trevor W. Lewis
The Study Of Deposition Of Wood Extractives And Model Compound Colloids Onto Chromium And Cellulose Surfaces Using Quartz Crystal Microbalance With Dissipation (Qcm-D), Yuen Y. Tham, Paul J. Molino, Michael J. Higgins, Karen R. Stack, Desmond E. Richardson, Trevor W. Lewis
Australian Institute for Innovative Materials - Papers
Quartz crystal microbalance with dissipation monitoring (QCM-D) was used to investigate the fundamental interactions between wood extractives and surfaces used in papermaking. Experiments were carried out at 25. °C and 50. °C on a microcrystalline cellulose-coated surface (a surrogate for paper) and a chromium surface (a surrogate for metal surfaces in paper machines and printing presses) using colloids prepared from wood extractives and model compounds of the components in wood extractives. Differences in adsorption behaviour were observed between the two surfaces as a function of temperature. On both surfaces, triolein and abietic acid were found to deposit to a greater …