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Articles 601 - 630 of 658
Full-Text Articles in Engineering
Origin Of Magnetic Flux-Jumps In Nb Films Subject To Mechanical Vibrations And Corresponding Magnetic Perturbations, Igor A. Golovchanskiy, Alexey V. Pan, Tom H. Johansen, Jonathan George, Igor Rudnev, Anatoly B. Rosenfeld, Sergey Fedoseev
Origin Of Magnetic Flux-Jumps In Nb Films Subject To Mechanical Vibrations And Corresponding Magnetic Perturbations, Igor A. Golovchanskiy, Alexey V. Pan, Tom H. Johansen, Jonathan George, Igor Rudnev, Anatoly B. Rosenfeld, Sergey Fedoseev
Australian Institute for Innovative Materials - Papers
In this paper the origin of flux-jumps in Nb thin films is established during magnetization measurements using a vibrating sample magnetometer (VSM). Magnetization measurements of the flux avalanche activity show its strong dependence on frequency and amplitude of VSM vibration. In particular, under certain conditions the vibrations induce a transition from a stable superconducting critical state to an undercritical state, accompanied by the 20-fold drop in the magnetic moment. These features allow the elucidation of the origin of the flux-jumps. In contrast to the commonly assumed thermomagnetic instabilities to be responsible for the flux-jumps in Nb films, our results provide …
An Electrochemical Cell With Gortex-Based Electrodes Capable Of Extracting Pure Hydrogen From Highly Dilute Hydrogen-Methane Mixtures, Klaudia K. Wagner, Prerna Tiwari, Gerhard F. Swiegers, Gordon G. Wallace
An Electrochemical Cell With Gortex-Based Electrodes Capable Of Extracting Pure Hydrogen From Highly Dilute Hydrogen-Methane Mixtures, Klaudia K. Wagner, Prerna Tiwari, Gerhard F. Swiegers, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
In this work we report a novel liquid-acid electrochemical cell containing Gortex-based gas diffusion electrodes, layered with suitable catalysts and current collectors, that is capable of sustainably extractin g pure hydrogen from methane mixtures containing as little as 5% hydrogen. The origin of its efficiency appears to derive from the solid-liquid interface between the solid Gortex electrodes and the liquid electrolyte, as well as the high proton conductivity of the electrolyte. This interface and electrolyte exhibit an efficiency for reaction that greatly exceeds that achieved by the comparable solid-solid interface and proton conductor in Proton Exchange Membrane Fuel Cell (PEMFC) …
Microstructural And Associated Chemical Changes During The Composting Of A High Temperature Biochar: Mechanisms For Nitrate, Phosphate And Other Nutrient Retention And Release, Stephen D. Joseph, Claudia Kammann, Jessica Shepherd, Pellegrino Conte, Hans-Peter Schmidt, Nikolas Hagemann, Anne Rich, Christopher Marjo, Jessica Allen, Paul R. Munroe, David R. G Mitchell, Scott Donne, Kurt Spokas, Ellen Graber
Microstructural And Associated Chemical Changes During The Composting Of A High Temperature Biochar: Mechanisms For Nitrate, Phosphate And Other Nutrient Retention And Release, Stephen D. Joseph, Claudia Kammann, Jessica Shepherd, Pellegrino Conte, Hans-Peter Schmidt, Nikolas Hagemann, Anne Rich, Christopher Marjo, Jessica Allen, Paul R. Munroe, David R. G Mitchell, Scott Donne, Kurt Spokas, Ellen Graber
Australian Institute for Innovative Materials - Papers
Recent studies have demonstrated the importance of the nutrient status of biochar and soils prior to its inclusion in particular agricultural systems. Pre-treatment of nutrient-reactive biochar, where nutrients are loaded into pores and onto surfaces, gives improved yield outcomes compared to untreated biochar. In this study we have used a wide selection of spectroscopic and microscopic techniques to investigate the mechanisms of nutrient retention in a high temperature wood biochar, which had negative effects on Chenopodium quinoa above ground biomass yield when applied to the system without prior nutrient loading, but positive effects when applied after composting. We have compared …
Magnetoreresistance Of Carbon Nanotube-Polypyrrole Composite Yarns, R Ghanbari, Shaban Reza Ghorbani, H Arabi, Javad Foroughi
Magnetoreresistance Of Carbon Nanotube-Polypyrrole Composite Yarns, R Ghanbari, Shaban Reza Ghorbani, H Arabi, Javad Foroughi
Australian Institute for Innovative Materials - Papers
Three types of samples, carbon nanotube yarn and carbon nanotube-polypyrrole composite yarns had been investigated by measurement of the electrical conductivity as a function of temperature and magnetic field. The conductivity was well explained by 3D Mott variable range hopping (VRH) law at T < 100 K. Both positive and negative magnetoresistance (MR) were observed by increasing magnetic field. The MR data were analyzed based a theoretical model. A quadratic positive and negative MR was observed for three samples. It was found that the localization length decreases with applied magnetic field while the density of states increases. The increasing of the density of states induces increasing the number of available energy states for hopping. Thus the electron hopping probability increases in between sites with the shorter distance that results to small the average hopping length.
Decomposition Mechanism Of Zinc Ammine Borohydride: A First-Principles Calculation, Xiaowei Chen, Weidong Zou, Renquan Li, Guanglin Xia, Xuebin Yu
Decomposition Mechanism Of Zinc Ammine Borohydride: A First-Principles Calculation, Xiaowei Chen, Weidong Zou, Renquan Li, Guanglin Xia, Xuebin Yu
Australian Institute for Innovative Materials - Papers
The decomposition mechanism of zinc ammine borohydride ([Zn(NH 3 ) 2 ][BH 4 ] 2 ) has been studied by density functional theory calculation. The release of B 2 H 6 and BH 3 is predicted to be kinetically and/or thermodynamically unfavorable for [Zn(NH 3 ) 2 ][BH 4 ] 2 , in agreement with experimental results that no boranes were detected during decomposition. The climbing image nudged elastic band calculation and ab initio molecular dynamics simulations indicate the formation of NH 3 BH 3 and B 2 H 7 - intermediates during decomposition of [Zn(NH 3 ) 2 ][BH …
Biomaterials For Corneal Bioengineering, Zhi Chen, Jingjing You, Xiao Liu, Simon Cooper, Christopher Hodge, Gerard Sutton, Jeremy Micah Crook, Gordon G. Wallace
Biomaterials For Corneal Bioengineering, Zhi Chen, Jingjing You, Xiao Liu, Simon Cooper, Christopher Hodge, Gerard Sutton, Jeremy Micah Crook, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Corneal transplantation is an important surgical treatment for many common corneal diseases. However, a worldwide shortage of tissue from suitable corneal donors has meant that many people are not able to receive sight-restoring operations. In addition, rejection is a major cause of corneal transplant failure. Bioengineering corneal tissue has recently gained widespread attention. In order to facilitate corneal regeneration, a range of materials is currently being investigated. The ideal substrate requires sufficient tectonic durability, biocompatibility with cultured cellular elements, transparency, and perhaps biodegradability and clinical compliance. This review considers the anatomy and function of the native cornea as a precursor …
Elaborately Assembled Core-Shell Structured Metal Sulfides As A Bifunctional Catalyst For Highly Efficient Electrochemical Overall Water Splitting, Yanna Guo, Jing Tang, Zhongli Wang, Yong-Mook Kang, Yoshio Bando, Yusuke Yamauchi
Elaborately Assembled Core-Shell Structured Metal Sulfides As A Bifunctional Catalyst For Highly Efficient Electrochemical Overall Water Splitting, Yanna Guo, Jing Tang, Zhongli Wang, Yong-Mook Kang, Yoshio Bando, Yusuke Yamauchi
Australian Institute for Innovative Materials - Papers
Low efficiency, short lifetimes, and limited kinds of catalysts are still three fundamental shortcomings that have plagued electrochemical water splitting. Herein, we rationally synthesized a cost-effective Co 3 S 4 @MoS 2 hetero-structured catalyst that has proven to be a highly active and stable bifunctional catalyst for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in an alkaline environment. The heterostructure was obtained via a first hydrothermal approach to obtain hollow Co 3 S 4 nanoboxes based on the ionic exchange reaction between Fe(CN) 6 3− of Co-Fe Prussian blue analogue (PBA) and S 2− at 120 °C, …
Complete Stress-Induced Depolarization Of Relaxor Ferroelectric Crystals Without Transition Through A Non-Polar Phase, Sergey Shkuratov, Jason Baird, Vladimir Antipov, Wesley Hackenberger, Jun Luo, Shujun Zhang, C S. Lynch, Jay Chase, Hwan Jo, Christopher C. Roberts
Complete Stress-Induced Depolarization Of Relaxor Ferroelectric Crystals Without Transition Through A Non-Polar Phase, Sergey Shkuratov, Jason Baird, Vladimir Antipov, Wesley Hackenberger, Jun Luo, Shujun Zhang, C S. Lynch, Jay Chase, Hwan Jo, Christopher C. Roberts
Australian Institute for Innovative Materials - Papers
The development of relaxor ferroelectric single crystal technology is driven by the ability to tailor ferroelectric properties through domain engineering not achievable in polycrystalline materials. In this study, three types of domain-engineered rhombohedral Pb(In 1/2 Nb 1/2 )O 3 -Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 crystals were subjected to transverse high strain rate loading. The experimental results indicate that the domain configuration has a significant effect on the stress-induced depolarization and the associated charge released. A complete depolarization of the single-domain crystals with 3m symmetry is observed, while multidomain crystals with 4mm and mm2 symmetries retain a fraction …
Weavable Asymmetric Carbon Nanotube Yarn Supercapacitor For Electronic Textiles, Changsoon Choi, Jong Park, Keon Jung Kim, Duck Lee, Monica Jung De Andrade, Shi Hyeong Kim, Sanjeev Gambhir, Geoffrey M. Spinks, Ray H. Baughman, Seon Jeong Kim
Weavable Asymmetric Carbon Nanotube Yarn Supercapacitor For Electronic Textiles, Changsoon Choi, Jong Park, Keon Jung Kim, Duck Lee, Monica Jung De Andrade, Shi Hyeong Kim, Sanjeev Gambhir, Geoffrey M. Spinks, Ray H. Baughman, Seon Jeong Kim
Australian Institute for Innovative Materials - Papers
Asymmetric supercapacitors are receiving much research interests due to their wide operating potential window and high energy density. In this study, we report the fabrication of asymmetrically configured yarn based supercapacitor by using liquid-state biscrolling technology. High loading amounts of reduced graphene oxide anode guest (90.1 wt%) and MnO 2 cathode guest (70 wt%) materials were successfully embedded into carbon nanotube yarn host electrodes. The resulting asymmetric yarn supercapacitor coated by gel based organic electrolyte (PVDF-HFP-TEA·BF 4 ) exhibited wider potential window (up to 3.5 V) and resulting high energy density (43 μW h cm -2 ). Moreover, the yarn …
Three-Dimensional Macroporous Graphitic Carbon For Supercapacitor Application, Rahul R. Salunkhe, Jie Wang, Azhar Alowasheeir, Jianjian Lin, Victor Malgras, Yoshio Bando, Mohamed B. Zakaria, Abdulmohsen Alshehri, Jeonghun Kim, Yusuke Yamauchi, Kevin C.-W Wu
Three-Dimensional Macroporous Graphitic Carbon For Supercapacitor Application, Rahul R. Salunkhe, Jie Wang, Azhar Alowasheeir, Jianjian Lin, Victor Malgras, Yoshio Bando, Mohamed B. Zakaria, Abdulmohsen Alshehri, Jeonghun Kim, Yusuke Yamauchi, Kevin C.-W Wu
Australian Institute for Innovative Materials - Papers
Two-dimensional (2D) graphene materials have attracted great interest as promising electrode materials in supercapacitors due to their high electrical conductivity derived from sp 2 -cabon network. These 2D layered materials, however, tend to stack with each other, which largely decreases the surface area. Here we report the design of highly graphitic macroporous carbon with large surface area suitable for supercapacitor applications. When benchmarked with other carbon materials, such as amorphous macroporous carbon, activated carbon, graphite or exfoliated graphene oxides, our graphitic macroporous carbon show superior capacitance.
Hybrid 2d Dual-Metal-Organic Frameworks For Enhanced Water Oxidation Catalysis, Kun Rui, Guoqiang Zhao, Yaping Chen, Y C. Lin, Qian Zhou, Jiayi Chen, Jixin Zhu, Wenping Sun, Wei Huang, Shi Xue Dou
Hybrid 2d Dual-Metal-Organic Frameworks For Enhanced Water Oxidation Catalysis, Kun Rui, Guoqiang Zhao, Yaping Chen, Y C. Lin, Qian Zhou, Jiayi Chen, Jixin Zhu, Wenping Sun, Wei Huang, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
Metal-organic frameworks (MOFs) and MOF-derived nanostructures are recently emerging as promising catalysts for electrocatalysis applications. Herein, 2D MOFs nanosheets decorated with Fe-MOF nanoparticles are synthesized and evaluated as the catalysts for water oxidation catalysis in alkaline medium. A dramatic enhancement of the catalytic activity is demonstrated by introduction of electrochemically inert Fe-MOF nanoparticles onto active 2D MOFs nanosheets. In the case of active Ni-MOF nanosheets (Ni-MOF at Fe-MOF), the overpotential is 265 mV to reach a current density of 10 mA cm -2 in 1 m KOH, which is lowered by ≈100 mV after hybridization due to the 2D nanosheet …
Nucleation And Propagation Of Thermomagnetic Avalanches In Thin-Film Superconductors (Review Article), J I. Vestgarden, Tom H. Johansen, Y Galperin
Nucleation And Propagation Of Thermomagnetic Avalanches In Thin-Film Superconductors (Review Article), J I. Vestgarden, Tom H. Johansen, Y Galperin
Australian Institute for Innovative Materials - Papers
Stability of the vortex matter - magnetic flux lines penetrating into the material - in type-II superconductor films is crucially important for their application. If some vortices get detached from pinning centres, the energy dissipated by their motion will facilitate further depinning, and may trigger an electromagnetic breakdown. In this paper, we review recent theoretical and experimental results on development of the above mentioned ther-momagnetic instability. Starting from linear stability analysis for the initial critical-state flux distribution we then discuss a numerical procedure allowing to analyze developed flux avalanches. As an example of this approach we consider ultra-fast dendritic flux …
Harvesting Electrical Energy From Torsional Thermal Actuation Driven By Natural Convection, Shi Hyeong Kim, Hyeon Jun Sim, Jae Hyeon, Dongseok Suh, Geoffrey M. Spinks, Ray H. Baughman, Seon Jeong Kim
Harvesting Electrical Energy From Torsional Thermal Actuation Driven By Natural Convection, Shi Hyeong Kim, Hyeon Jun Sim, Jae Hyeon, Dongseok Suh, Geoffrey M. Spinks, Ray H. Baughman, Seon Jeong Kim
Australian Institute for Innovative Materials - Papers
The development of practical, cost-efective systems for the conversion of low-grade waste heat to electrical energy is an important area of renewable energy research. We here demonstrate a thermal energy harvester that is driven by the small temperature fuctuations provided by natural convection. This harvester uses coiled yarn artifcial muscles, comprising well-aligned shape memory polyurethane (SMPU) microfbers, to convert thermal energy to torsional mechanical energy, which is then electromagnetically converted to electrical energy. Temperature fuctuations in a yarn muscle, having a maximum hot-to-cold temperature diference of about 13°C, were used to spin a magnetic rotor to a peak torsional rotation …
Domain Switching In Single-Phase Multiferroics, Tingting Jia, Zhenxiang Cheng, Hongyang Zhao, Hideo Kimura
Domain Switching In Single-Phase Multiferroics, Tingting Jia, Zhenxiang Cheng, Hongyang Zhao, Hideo Kimura
Australian Institute for Innovative Materials - Papers
Multiferroics are a time-honoured research subject by reason for their tremendous application potential in the information industry, such as in multi-state information storage devices and new types of sensors. An outburst of studies on multiferroicity has been witnessed in the 21st century, although this field has a long research history since the 19th century. Multiferroicity has now become one of the hottest research topics in condensed matter physics and materials science. Numerous efforts have been made to investigate the cross-coupling phenomena among ferroic orders such as ferroelectricity, (anti-)ferromagnetism, and ferroelasticity, especially the coupling between electric and magnetic orderings that would …
Elastic Fiber Supercapacitors For Wearable Energy Storage, Si Qin, Shayan Seyedin, Jizhen Zhang, Zhiyu Wang, Fangli Yang, Yuqing Liu, Jun Chen, Joselito M. Razal
Elastic Fiber Supercapacitors For Wearable Energy Storage, Si Qin, Shayan Seyedin, Jizhen Zhang, Zhiyu Wang, Fangli Yang, Yuqing Liu, Jun Chen, Joselito M. Razal
Australian Institute for Innovative Materials - Papers
The development of wearable devices such as smart watches, intelligent garments, and wearable health-monitoring devices calls for suitable energy storage devices which have matching mechanical properties and can provide sufficient power for a reasonable duration. Stretchable fiber-based supercapacitors are emerging as a promising candidates for this purpose because they are lightweight, flexible, have high energy and power density, and the potential for easy integration into traditional textile processes. An important characteristic that is oftentimes ignored is stretchability-fiber supercapacitors should be able to accommodate large elongation during use, endure a range of bending motions, and then revert to its original form …
Feasibility And Characterization Of Common And Exotic Filaments For Use In 3d Printed Terahertz Devices, Andrew Squires, R A. Lewis
Feasibility And Characterization Of Common And Exotic Filaments For Use In 3d Printed Terahertz Devices, Andrew Squires, R A. Lewis
Australian Institute for Innovative Materials - Papers
Recent years have seen an influx of applications utilizing 3D printed devices in the terahertz regime. The simplest, and perhaps most versatile, modality allowing this is Fused Deposition Modelling. In this work, a holistic analysis of the terahertz optical, mechanical and printing properties of 17 common and exotic 3D printer filaments used in Fused Deposition Modelling is performed. High impact polystyrene is found to be the best filament, with a useable frequency range of 0.1-1.3 THz, while remaining easily printed. Nylon, polylactic acid and polyvinyl alcohol give the least desirable terahertz response, satisfactory only below 0.5 THz. Interestingly, most modified …
Effect Of Electrochemical Oxidation And Reduction On Cell De-Adhesion At The Conducting Polymer-Live Cell Interface As Revealed By Single Cell Force Spectroscopy, Hongrui Zhang, Qi Gu, Gordon G. Wallace, Michael J. Higgins
Effect Of Electrochemical Oxidation And Reduction On Cell De-Adhesion At The Conducting Polymer-Live Cell Interface As Revealed By Single Cell Force Spectroscopy, Hongrui Zhang, Qi Gu, Gordon G. Wallace, Michael J. Higgins
Australian Institute for Innovative Materials - Papers
Cell adhesion on conducting polymers is important in organic bioelectronics, including applications such as electronically switchable surfaces and electrochemical transistors. There is a fundamental interest in understanding the conducting polymer-cellular interface though as yet no direct measurements to quantify the cell adhesion forces and energies, particularly at the molecular level, have been undertaken. Here, the authors apply electrochemical-single cell force spectroscopy (EC-SCFS) to directly quantify the de-adhesion forces between single L929 fibroblast cells and polypyrrole doped with dodecylbenzene sulfonate (PPy-DBSA) under electrical stimulation. The EC-SCFS reveals single cell de-adhesion forces of 0.65 nN on PPy-DBSA films with adsorbed fibronectin (FN) …
A Novel High Voltage Battery Cathodes Of Fe2+/Fe3+Sodium Fluoro Sulfate Lined With Carbon Nanotubes For Stable Sodium Batteries, Ranjusha Rajagopalan, Zhenguo Wu, Yumei Liu, Shaymaa Al-Rubaye, En-Hui Wang, Chunjin Wu, Wei Xiang, Benhe Zhong, Xiaodong Guo, Shi Xue Dou, Hua-Kun Liu
A Novel High Voltage Battery Cathodes Of Fe2+/Fe3+Sodium Fluoro Sulfate Lined With Carbon Nanotubes For Stable Sodium Batteries, Ranjusha Rajagopalan, Zhenguo Wu, Yumei Liu, Shaymaa Al-Rubaye, En-Hui Wang, Chunjin Wu, Wei Xiang, Benhe Zhong, Xiaodong Guo, Shi Xue Dou, Hua-Kun Liu
Australian Institute for Innovative Materials - Papers
Current trends in battery research are promoting the development of feasible methods to prepare electrode materials with new architectures that can meet the requirements of high energy density associated with sodium ion batteries (SIB). It is logical to use solid-state processing techniques to fabricate SIB electrode materials due to its ease of handling and capability for large-scale production. From the SIB standpoint, the sulfate based polyanionic system is well known for its high operating voltage. The present study utilizes a hitherto-unknown solid-state process with an entirely new composition to develop an electrode comprising earth abundant carbon, sodium, sulfur, fluorine, and …
Recent Advances In Designing High-Capacity Anode Nanomaterials For Li-Ion Batteries And Their Atomic-Scale Storage Mechanism Studies, Qiuhong Cui, Yeteng Zhong, Lu Pan, Hongyun Zhang, Yijun Yang, Dequan Liu, Feng Teng, Yoshio Bando, Jiannian Yao, Xi Wang
Recent Advances In Designing High-Capacity Anode Nanomaterials For Li-Ion Batteries And Their Atomic-Scale Storage Mechanism Studies, Qiuhong Cui, Yeteng Zhong, Lu Pan, Hongyun Zhang, Yijun Yang, Dequan Liu, Feng Teng, Yoshio Bando, Jiannian Yao, Xi Wang
Australian Institute for Innovative Materials - Papers
Lithium-ion batteries (LIBs) have been widely applied in portable electronics (laptops, mobile phones, etc.) as one of the most popular energy storage devices. Currently, much effort has been devoted to exploring alternative high-capacity anode materials and thus potentially constructing high-performance LIBs with higher energy/power density. Here, high-capacity anode nanomaterials based on the diverse types of mechanisms, intercalation/deintercalation mechanism, alloying/dealloying reactions, conversion reaction, and Li metal reaction, are reviewed. Moreover, recent studies in atomic-scale storage mechanism by utilizing advanced microscopic techniques, such as in situ high-resolution transmission electron microscopy and other techniques (e.g., spherical aberration-corrected scanning transmission electron microscopy, cryoelectron microscopy, …
Biofabrication Of Human Articular Cartilage: A Path Towards The Development Of A Clinical Treatment, Carmine Onofrillo, Serena Duchi, Cathal D. O'Connell, Romane Blanchard, Andrea O'Connor, Mark A. Scott, Gordon G. Wallace, Peter Choong, Claudia Di Bella
Biofabrication Of Human Articular Cartilage: A Path Towards The Development Of A Clinical Treatment, Carmine Onofrillo, Serena Duchi, Cathal D. O'Connell, Romane Blanchard, Andrea O'Connor, Mark A. Scott, Gordon G. Wallace, Peter Choong, Claudia Di Bella
Australian Institute for Innovative Materials - Papers
Cartilage injuries cause pain and loss of function, and if severe may result in osteoarthritis (OA). 3D bioprinting is now a tangible option for the delivery of bioscaffolds capable of regenerating the deficient cartilage tissue. Our team has developed a handheld device, the Biopen, to allow in situ additive manufacturing during surgery. Given its ability to extrude in a core/shell manner, the Biopen can preserve cell viability during the biofabrication process, and it is currently the only biofabrication tool tested as a surgical instrument in a sheep model using homologous stem cells. As a necessary step toward the development of …
Gortex-Based Gas Diffusion Electrodes With Unprecedented Resistance To Flooding And Leaking, Prerna Tiwari, George Tsekouras, Gerhard F. Swiegers, Gordon G. Wallace
Gortex-Based Gas Diffusion Electrodes With Unprecedented Resistance To Flooding And Leaking, Prerna Tiwari, George Tsekouras, Gerhard F. Swiegers, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
A significant and long-standing problem in electrochemistry has demanded the need for gas diffusion electrodes that are "flood-proof" and "leak-proof" when operated with a liquid electrolyte. The absence of a solution to this problem has, effectively, made it unviable to use gas diffusion electrodes in many electrochemical manufacturing processes, especially as "gas-depolarized" counter electrodes with significantly decreased energy consumption. In this work, Gortex membranes (also known as expanded PTFE or ePTFE) have been studied as novel, leak-proof substrates for gas diffusion electrodes [PTFE = poly(tetrafluoroethylene)]. We report the fabrication, characterization, and operation of gas diffusion electrodes comprising finely pored Gortex …
Insight Into The Synergistic Effect On Selective Adsorption For Heavy Metal Ions By A Polypyrrole/Tio2composite, Jie Chen, Mengting Yu, Caiyun Wang, Jiangtao Feng, Wei Yan
Insight Into The Synergistic Effect On Selective Adsorption For Heavy Metal Ions By A Polypyrrole/Tio2composite, Jie Chen, Mengting Yu, Caiyun Wang, Jiangtao Feng, Wei Yan
Australian Institute for Innovative Materials - Papers
Polymer/metal oxide composites are promising candidates for the treatment of water pollution. Adsorption selectivity as well as a large adsorption capacity are two key factors for treating wastewater containing multiple ions. Herein, a PPy+/TiO2(O-) composite with a heterojunction structure was first discovered to have novel selectivity toward heavy metal ions. An interesting self-doping nature of TiO2(O-) together with SO42-for PPy+was reported. This interesting structure contributed to an impressive selective adsorption capability with an ascending order of Zn2+> Pb2+≫ Cu2+in a ternary ion system, where the adsorption for Cu2+could be almost suppressed. Through the designed adsorption experiments and characterization techniques including …
Future Energy Technology: Enabling New Science For A Sustainable Future, Francois Aguey-Zinsou, Zaiping Guo, Yun Hau Ng, Da-Wei Wang
Future Energy Technology: Enabling New Science For A Sustainable Future, Francois Aguey-Zinsou, Zaiping Guo, Yun Hau Ng, Da-Wei Wang
Australian Institute for Innovative Materials - Papers
With the financial crisis hitting the world economy in 2008, the boom of gas shale and fracking in the US, and the recent move toward outdated technologies in some parts of the world, tackling many of the challenges facing humanity in the 21st century has been relegated to second place. The supply of clean energy is one of those challenges. The test facing us is how to sustain economic growth while dealing with limited primary resources and minimizing environmental pollution. Energy is a fundamental necessity for almost everything needed to sustain us, from food production to drug design and safe …
Hierarchical Porous Nio/B-Nimoo4 Heterostructure As Superior Anode Material For Lithium Storage, Zhijian Wang, Shilin Zhang, Hai Zeng, Haimin Zhao, Wei Sun, Meng Jiang, Chuanqi Feng, Jianwen Liu, Tengfei Zhou, Yang Zheng, Zaiping Guo
Hierarchical Porous Nio/B-Nimoo4 Heterostructure As Superior Anode Material For Lithium Storage, Zhijian Wang, Shilin Zhang, Hai Zeng, Haimin Zhao, Wei Sun, Meng Jiang, Chuanqi Feng, Jianwen Liu, Tengfei Zhou, Yang Zheng, Zaiping Guo
Australian Institute for Innovative Materials - Papers
Ternary transition metal oxides (TTMOs) have attracted considerable attention for rechargeable batteries because of their fascinating properties. However, the unsatisfactory electrochemical performance originating from the poor intrinsic electronic conductivity and inferior structural stability impedes their practical applications. Here, the novel hierarchical porous NiO/β-NiMoO4heterostructure is fabricated, and exhibits high reversible capacity, superior rate capability, and excellent cycling stability in Li-ion batteries (LIBs), which is much better than the corresponding single-phase NiMoO4and NiO materials. The significantly enhanced electrochemical properties can be attributed to its superior structural characteristics, including the large surface area, abundant pores, fast charge transfer, and catalytic effect of the …
Graphene-Oxide-Loaded Superparamagnetic Iron Oxide Nanoparticles For Ultrasensitive Electrocatalytic Detection Of Microrna, Md Nazmul Islam, Lena Gorgannezhad, Mostafa Kamal Masud, Shunsuke Tanaka, Md. Shahriar Al Hossain, Yusuke Yamauchi, Nam-Trung Nguyen, Muhammad J. A Shiddiky
Graphene-Oxide-Loaded Superparamagnetic Iron Oxide Nanoparticles For Ultrasensitive Electrocatalytic Detection Of Microrna, Md Nazmul Islam, Lena Gorgannezhad, Mostafa Kamal Masud, Shunsuke Tanaka, Md. Shahriar Al Hossain, Yusuke Yamauchi, Nam-Trung Nguyen, Muhammad J. A Shiddiky
Australian Institute for Innovative Materials - Papers
We report the electrocatalytic activity of a new class of superparamagnetic nanoparticles, graphene-oxide-loaded iron oxide (GO/IO hybrid material), towards the reduction of ruthenium hexaammine(III) chloride (Ru(NH3)6]3+, RuHex). Leveraging the electrocatalytic activity of the GO/IO hybrid material and the signal enhancement capacity of [Ru(NH3)6]3+/[Fe(CN)6]3 in an electrocatalytic cycle, an ultrasensitive and specific electrochemical sensor was developed for the detection of cancerrelated microRNA (miRNA). Using the direct affinity interaction between RNA and graphene oxide, magnetically isolated and purified target miRNA were directly adsorbed onto a screenprinted electrode modified with the GO/IO hybrid material. The detection was enabled by chronocoulometric (CC) readout of …
Investigation On The Catalytic Performance Of Reduced‐Graphene‐Oxide‐Interpolated Fes2 And Fes For Oxygen Reduction Reaction, Hengyi Fang, Taizhong Huang, Jianfeng Mao, Shuo Yao, M Dinesh, Yue Sun, Dong Liang, Lei Qi, Jiemei Yu, Zhankun Jiang
Investigation On The Catalytic Performance Of Reduced‐Graphene‐Oxide‐Interpolated Fes2 And Fes For Oxygen Reduction Reaction, Hengyi Fang, Taizhong Huang, Jianfeng Mao, Shuo Yao, M Dinesh, Yue Sun, Dong Liang, Lei Qi, Jiemei Yu, Zhankun Jiang
Australian Institute for Innovative Materials - Papers
The oxygen reduction reaction (ORR) plays a key role in many kinds of energy conversion and energy storage devices, especially in fuel cells. Developing low-cost, easily prepared, and high-efficiency catalysts is a crucial factor for the large-scale applications of fuel cells. Herein, we report the reduced graphene oxide (rGO) interpolated FeS2and FeS as low cost and high performance electrocatalyst for ORR in the alkaline electrolyte. Cyclic voltammetry tests indicate that the onset potential of the ORR for FeS2@rGO is −0.142 V, which is close to the state-of-the-art commercial Pt/C (-0.114 V) catalyst. A low Tafel slope of ∼ 98 mV/decade …
Twist-Coil Coupling Fibres For High Stroke Tensile Artificial Muscles, Shazed Md Aziz, Sina Naficy, Javad Foroughi, Hugh Ralph Brown, Geoffrey M. Spinks
Twist-Coil Coupling Fibres For High Stroke Tensile Artificial Muscles, Shazed Md Aziz, Sina Naficy, Javad Foroughi, Hugh Ralph Brown, Geoffrey M. Spinks
Australian Institute for Innovative Materials - Papers
A new concept for tensile artificial muscles is introduced in which the torsional actuation of a twisted polymer fibre drives a twist to writhe conversion in a serially attached elastomeric fibre. Thermally induced torsional rotation of the twisted fibre caused formation of coils in the elastomeric fibre which resulted in overall muscle length contraction. Theoretical predictions of the muscle strain were developed by means of a modified single-helix theory. Experimental tests were conducted to measure the isotonic contraction strains for elastomeric fibres of different diameters and lengths. A good agreement between the measured and calculated results was found. Practical applicability …
Tuning The Structure Of Three Dimensional Nanostructured Molybdenum Disulfide/Nitrogen-Doped Carbon Composite For High Lithium Storage, Yunfeng Chao, Yu Ge, Yong Zhao, Jicheng Jiang, Caiyun Wang, Chunyan Qin, Amruthalakshmi Vijayakumar, Changchun Yu, Gordon G. Wallace
Tuning The Structure Of Three Dimensional Nanostructured Molybdenum Disulfide/Nitrogen-Doped Carbon Composite For High Lithium Storage, Yunfeng Chao, Yu Ge, Yong Zhao, Jicheng Jiang, Caiyun Wang, Chunyan Qin, Amruthalakshmi Vijayakumar, Changchun Yu, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Molybdenum disulfide/nitrogen-doped carbon nanocomposite can afford high capacity, good rate capability and cycling stability in lithium ion batteries owing to the synergistic effect from these two components. Structure of the material has a great impact on the performance as well. In this work, MoS2/nitrogen-doped carbon (MoS2/C) composites have been developed by manipulating the nano-featured polypyrrole templates to guide and confine their growth. They are formed via a simple hydrothermal process combined with a subsequent annealing process. The MoS2/nitrogen-doped carbon nanotubes (MoS2/CNT) composite with 76% of MoS2 exhibits an excellent performance including a high capacity of 1232 mAh g−1 at a …
Aesthetically Pleasing, Visible Light Transmissive, Luminescent Solar Concentrators Using A Bodipy Derivative, Alina Brzeczek-Szafran, Christopher Richardson, Vanessa Lopez, Pawel W. Wagner, Andrew Nattestad
Aesthetically Pleasing, Visible Light Transmissive, Luminescent Solar Concentrators Using A Bodipy Derivative, Alina Brzeczek-Szafran, Christopher Richardson, Vanessa Lopez, Pawel W. Wagner, Andrew Nattestad
Australian Institute for Innovative Materials - Papers
A visible light transmitting BODIPY derivative with an emission peak at 604 nm and quantum yield of 64% is incorporated into a PMMA matrix, resulting in an aesthetically pleasing luminescent solar concentrator (LSC), suitable for "power window" applications. A Monte Carlo modeling platform is shown to be useful firstly to tune device performance, but also to give direction to future synthetic efforts. From this an 4 mm thick LSC of (100 x 100 mm) is shown to have optical efficiency of ≈3.3%.
Boosting Potassium-Ion Batteries By Few-Layered Composite Anodes Prepared Via Solution-Triggered One-Step Shear Exfoliation, Yajie Liu, Zhixin Tai, Jian Zhang, Wei Kong Pang, Qing Zhang, Haifeng Feng, Konstantin K. Konstantinov, Zaiping Guo, Hua-Kun Liu
Boosting Potassium-Ion Batteries By Few-Layered Composite Anodes Prepared Via Solution-Triggered One-Step Shear Exfoliation, Yajie Liu, Zhixin Tai, Jian Zhang, Wei Kong Pang, Qing Zhang, Haifeng Feng, Konstantin K. Konstantinov, Zaiping Guo, Hua-Kun Liu
Australian Institute for Innovative Materials - Papers
Earth-abundant potassium is a promising alternative to lithium in rechargeable batteries, but a pivotal limitation of potassium-ion batteries is their relatively low capacity and poor cycling stability. Here, a high-performance potassium-ion battery is achieved by employing few-layered antimony sulfide/carbon sheet composite anode fabricated via one-step high-shear exfoliation in ethanol/water solvent. Antimony sulfide with few-layered structure minimizes the volume expansion during potassiation and shortens the ion transport pathways, thus enhancing the rate capability; while carbon sheets in the composite provide electrical conductivity and maintain the electrode cycling stability by trapping the inevitable by-product, elemental sulfur. Meanwhile, the effect of the exfoliation …