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Articles 661 - 690 of 1524
Full-Text Articles in Physical Sciences and Mathematics
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 …
Shape-Engineerable Composite Fibers And Their Supercapacitor Application, Kang Min Kim, Jae Ah Lee, Hyeon Jun Sim, Kyung Ah Kim, Rouhollah Jalili, Geoffrey M. Spinks, Seon Jeong Kim
Shape-Engineerable Composite Fibers And Their Supercapacitor Application, Kang Min Kim, Jae Ah Lee, Hyeon Jun Sim, Kyung Ah Kim, Rouhollah Jalili, Geoffrey M. Spinks, Seon Jeong Kim
Australian Institute for Innovative Materials - Papers
Due to excellent electrical and mechanical properties of carbon nano materials, it is of great interest to fabricate flexible, high conductive, and shape engineered carbon based fibers. As part of these approaches, hollow, twist, ribbon, and other various shapes of carbon based fibers have been researched for various functionality and application. In this paper, we suggest simple and effective method to control the fiber shape. We fabricate the three different shapes of hollow, twisted, and ribbon shaped fibers from wet spun giant graphene oxide (GGO)/single walled-nanotubes (SWNTs)/poly(vinyl alcohol) (PVA) gels. Each shaped fibers exhibit different mechanical properties. The average specific …
Developments In And Prospects For Photocathodic And Tandem Dye-Sensitized Solar Cells, Andrew Nattestad, Ishanie Perera, Leone Spiccia
Developments In And Prospects For Photocathodic And Tandem Dye-Sensitized Solar Cells, Andrew Nattestad, Ishanie Perera, Leone Spiccia
Australian Institute for Innovative Materials - Papers
Third generation photovoltaics are based on the concept of providing high conversion efficiencies with low device production costs. As such, second generation concepts, such as Dye-sensitized Solar Cells (DSCs), serve as a good starting point for the development of these new devices. Tandem DSC devices are one example of such a concept, and can be constructed using two photoactive electrodes (one photoanode and one photocathode) inside the one cavity, increasing the theoretical efficiency limit by around 50% as compared to the conventional design. As there has been substantial effort devoted to the development of n-type DSCs, the focus of researchers …
Nanoengineering To Achieve High Sodium Storage: A Case Study Of Carbon Coated Hierarchical Nanoporous Tio2 Microfibers, Nu Wang, Yuan Gao, Yunxiao Wang, Kai Liu, Weihong Lai, Yemin Hu, Yong Zhao, Shulei Chou, Lei Jiang
Nanoengineering To Achieve High Sodium Storage: A Case Study Of Carbon Coated Hierarchical Nanoporous Tio2 Microfibers, Nu Wang, Yuan Gao, Yunxiao Wang, Kai Liu, Weihong Lai, Yemin Hu, Yong Zhao, Shulei Chou, Lei Jiang
Australian Institute for Innovative Materials - Papers
Nanoengineering of electrode materials can directly facilitate sodium ion accessibility and transport, thus enhancing electrochemical performance in sodium ion batteries. Here, highly sodium-accessible carbon coated nanoporous TiO2 microfibers have been synthesised via the facile electrospinning technique which can deliver an enhanced capacity of ≈167 mAh g−1 after 450 cycles at current density of 50 mA g−1 and retain a capacity of ≈71 mAh g−1 at the high current rate of 1 A g−1. With the benefits of their porous structure, thin TiO2 inner walls, and the introduction of conductive carbon, the nanoporous TiO2/C microfibers exhibit high ion accessibility, fast Na …
Enhanced Supercapacitive Performances Of Functionalized Activated Carbon In Novel Gel Polymer Electrolytes With Ionic Liquid Redox-Mediated Poly(Vinyl Alcohol)/Phosphoric Acid, Hyun Seok Jang, C Justin Raj, Won-Gil Lee, Byung Chul Kim, Kook Hyun Yu
Enhanced Supercapacitive Performances Of Functionalized Activated Carbon In Novel Gel Polymer Electrolytes With Ionic Liquid Redox-Mediated Poly(Vinyl Alcohol)/Phosphoric Acid, Hyun Seok Jang, C Justin Raj, Won-Gil Lee, Byung Chul Kim, Kook Hyun Yu
Australian Institute for Innovative Materials - Papers
Supercapacitors with solid/gel polymer electrolytes have attracted much attention due to their high reliability, flexibility, facile designing, being separator-free and free from electrolyte leakage and volatilization such that they can meet the increasing demands of practical applications. The present work reports on a functionalized activated carbon (AC) supercapacitor based on novel redox-mediated gel polymer electrolyte, PVA/H3PO4/ionic liquid (1-ethyl-3-methylimidazolium tetrafluoroborate, [EMIM]BF4). The electrochemical properties of this supercapacitor were studied using cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy techniques with various concentrations of [EMIM]BF4 in PVA/H3PO4 gel polymer electrolyte. The incorporation of [EMIM]BF4 in PVA/H3PO4 electrolyte effectively increased the specific capacitance …
Tin Nanoparticles Decorated Copper Oxide Nanowires For Selective Electrochemical Reduction Of Aqueous Co2 To Co, Yong Zhao, Caiyun Wang, Gordon G. Wallace
Tin Nanoparticles Decorated Copper Oxide Nanowires For Selective Electrochemical Reduction Of Aqueous Co2 To Co, Yong Zhao, Caiyun Wang, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
A low-cost electrocatalyst comprising tin nanoparticles on copper oxide nanowires selectively converts CO2 to CO. A facile and cost-effective surface modification method, electroless deposition, is used to prepare the electrode. The hybrid electrode exhibits excellent selectivity, activity and durability at modest overpotentials. Notably, the CO faradaic efficiency can reach 90% and the CO partial current density approaches 4.5 mA cm-2 at an overpotential of 690 mV. This is comparable to some noble metal catalysts.
Fabrication And Characterisation Of Highly Stretchable Elastomeric Strain Sensors For Prosthetic Hand Applications, Solen Kumbay-Yildiz, Rahim Mutlu, Gursel Alici
Fabrication And Characterisation Of Highly Stretchable Elastomeric Strain Sensors For Prosthetic Hand Applications, Solen Kumbay-Yildiz, Rahim Mutlu, Gursel Alici
Australian Institute for Innovative Materials - Papers
This study reports on the fabrication and response characterisation of highly stretchable strain sensors made of two commercially available silicone rubber substrates (EcoFlex 0010, and Shin-Etsu KE-441-T) engraved with microchannels, which are filled with two conductive liquids; carbon nanofibers (CNF) in poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) dispersion (PEDOT:PSS) and liquid carbon black (CB). We experimentally quantified the electromechanical response and strain sensing performance of the sensors using the metrics of linearity, hysteresis, resolution, transient properties and repeatability. We conclude that while changing the conductive liquid mainly affects the overall resistance of the sensors, the sensors made of EcoFlex have (i) overall much …
Tissue Engineering With Gellan Gum, Leo Stevens, Kerry J. Gilmore, Gordon G. Wallace, Marc In Het Panhuis
Tissue Engineering With Gellan Gum, Leo Stevens, Kerry J. Gilmore, Gordon G. Wallace, Marc In Het Panhuis
Australian Institute for Innovative Materials - Papers
Engineering complex tissues for research and clinical applications relies on high-performance biomaterials that are amenable to biofabrication, maintain mechanical integrity, support specific cell behaviours, and, ultimately, biodegrade. In most cases, complex tissues will need to be fabricated from not one, but many biomaterials, which collectively fulfill these demanding requirements. Gellan gum is an anionic polysaccharide with potential to fill several key roles in engineered tissues, particularly after modification and blending. This review focuses on the present state of research into gellan gum, from its origins, purification and modification, through processing and biofabrication options, to its performance as a cell scaffold …
Experimental Research Of High Field Pinning Centers In 2% C Doped Mgb2 Wires At 20 K And 25 K, Daniel Gajda, Andrzej Morawski, Andrzej Janusz Zaleski, W Habler, K Nenkov, M Malecka, Matthew A. Rindfleisch, Md Shahriar Hossain, Michael Tomsic
Experimental Research Of High Field Pinning Centers In 2% C Doped Mgb2 Wires At 20 K And 25 K, Daniel Gajda, Andrzej Morawski, Andrzej Janusz Zaleski, W Habler, K Nenkov, M Malecka, Matthew A. Rindfleisch, Md Shahriar Hossain, Michael Tomsic
Australian Institute for Innovative Materials - Papers
High field pinning centers in MgB2 doped with 2 at. % carbon under a low and a high hot isostatic pressures have been investigated by transport measurements. The field dependence of the transport critical current density was analyzed within the different pinning mechanisms: surface pinning, point pinning, and pinning due to spatial variation in the Ginzburg-Landau parameter (Δκ pinning). Research indicates that a pressure of 1 GPa allows similar pinning centers to Δκ pinning centers to be obtained. This pinning is very important, because it makes it possible to increase the critical current density in high magnetic fields at 20 …