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Articles 601 - 630 of 1524
Full-Text Articles in Physical Sciences and Mathematics
Three-Dimensional Neuronal Cell Culture: In Pursuit Of Novel Treatments For Neurodegenerative Disease, Sarah-Sophia Carter, Xiao Liu, Zhilian Yue, Gordon G. Wallace
Three-Dimensional Neuronal Cell Culture: In Pursuit Of Novel Treatments For Neurodegenerative Disease, Sarah-Sophia Carter, Xiao Liu, Zhilian Yue, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
To gain a better understanding of the underlying mechanisms of neurological disease, relevant tissue models are imperative. Over the years, this realization has fuelled the development of novel tools and platforms, which aim at capturing in vivo complexity. One example is the field of biofabrication, which focuses on fabrication of three-dimensional (3D) biologically functional products in a controlled and automated manner. Herein, we provide a general overview of classical 3D cell culture platforms, particularly in the context of neurodegenerative disease. Subsequently, the focus is put on bioprinting-based biofabrication, its potential to advance 3D neuronal cell culture and, to conclude, the …
The Suitability Of 3-D Printed Eutectic Gallium-Indium Alloy As A Heating Element For Thermally Active Hydrogels, Charles Hamilton, Gursel Alici, Geoffrey M. Spinks, Marc In Het Panhuis
The Suitability Of 3-D Printed Eutectic Gallium-Indium Alloy As A Heating Element For Thermally Active Hydrogels, Charles Hamilton, Gursel Alici, Geoffrey M. Spinks, Marc In Het Panhuis
Australian Institute for Innovative Materials - Papers
We report the use of a novel extrusion tip that allows for the omnidirectional printing of eutectic gallium-indium (eGaIn) alloy onto the surface of hydrogel materials into complex 2-dimensional patterns. The use of these printed soft "wires" as an electrothermal heating element for soft robotics purposes was explored. Heating of the eGaIn structures encapsulated in an alginate/acrylamide ionic-covalent entanglement hydrogel was measured by a thermal imaging camera. It was determined that eGaIn is a suitable material for use in future soft robotics applications as an electrothermal heating element to actuate thermally responsive N-isoproylacrylamide hydrogels.
Thermodynamics Of Quasi-2d Electron Gas At Bfo/Si Interface Probed With Thz Time-Domain Spectroscopy, Xiankuan Liu, Jiadong Zhang, Zeyu Zhang, Xian Lin, Yang Yu, Xiao Xing, Zuanming Jin, Zhenxiang Cheng, Guohong Ma
Thermodynamics Of Quasi-2d Electron Gas At Bfo/Si Interface Probed With Thz Time-Domain Spectroscopy, Xiankuan Liu, Jiadong Zhang, Zeyu Zhang, Xian Lin, Yang Yu, Xiao Xing, Zuanming Jin, Zhenxiang Cheng, Guohong Ma
Australian Institute for Innovative Materials - Papers
An interface is constructed based on a bismuth ferrite oxide (BFO) thin film and p-type silicon, and the temperature dependence of the interface properties has been studied systematically using terahertz time-domain spectroscopy. The BFO/Si interface exhibits quasi-two-dimension electron gas (2DEG) transport in the temperature range of 80 to 140 K: the electrons at the interface possess large electron mobility (∼10 6 cm 2 /V s) and long scattering time (∼100 ps). As the temperature is higher than 140 K, an abrupt decrease in THz interface conductivity is observed due to the breakdown of the 2D EG induced by the surface …
Cos Quantum Dot Nanoclusters For High-Energy Potassium-Ion Batteries, Hong Gao, Tengfei Zhou, Yang Zheng, Qing Zhang, Yuqing Liu, Jun Chen, Hua-Kun Liu, Zaiping Guo
Cos Quantum Dot Nanoclusters For High-Energy Potassium-Ion Batteries, Hong Gao, Tengfei Zhou, Yang Zheng, Qing Zhang, Yuqing Liu, Jun Chen, Hua-Kun Liu, Zaiping Guo
Australian Institute for Innovative Materials - Papers
Potassium-ion batteries (PIBs) are a promising alternative to lithium-ion batteries because potassium is an abundant natural resource. To date, PIBs are in the early stages of exploration and only a few anode materials have been investigated. This study reports a cobalt sulfide and graphene (CoS@G) composite as anode electrode for PIBs for the first time. The composite features interconnect quantum dots of CoS nanoclusters uniformly anchored on graphene nanosheets. The coexistence of CoS quantum dot nanoclusters and graphene nanosheets endows the composite with large surface area, highly conductive network, robust structural stability, and excellent electrochemical energy storage performance. An unprecedented …
High Performance Carbon-Coated Hollow Ni12p5 Nanocrystals Decorated On Gns As Advanced Anodes For Lithium And Sodium Storage, Huinan Guo, Chengcheng Chen, Kai Chen, Haichao Cai, Xiaoya Chang, Song Liu, Weiqin Li, Yijing Wang, Caiyun Wang
High Performance Carbon-Coated Hollow Ni12p5 Nanocrystals Decorated On Gns As Advanced Anodes For Lithium And Sodium Storage, Huinan Guo, Chengcheng Chen, Kai Chen, Haichao Cai, Xiaoya Chang, Song Liu, Weiqin Li, Yijing Wang, Caiyun Wang
Australian Institute for Innovative Materials - Papers
Transition-metal phosphides have been considered as promising anode materials for rechargeable secondary batteries owing to their low cost and high capacity. However, low electronic conductivity and poor stability limit their further development. Herein, we have designed a template-free refluxing method for synthesizing tailored carbon-coated hollow Ni 12 P 5 nanocrystals in situ grown on reduced graphene oxide nanosheets (denoted as Ni 12 P 5 @C/GNS). The hollow structure can accommodate volume expansion and shorten the ion transfer path. The GNS loading and carbon shell can efficiently prevent Ni 12 P 5 from aggregating and improve the electronic conductivity. As an …
Point Defect Induced Giant Enhancement Of Flux Pinning In Co-Doped Fese0.5te0.5 Superconducting Single Crystals, Lina Sang, Pankaj Maheswari, Zhenwei Yu, Fei Yun, Yibing Zhang, Shi Xue Dou, Chuanbing Cai, V P. Awana, Xiaolin Wang
Point Defect Induced Giant Enhancement Of Flux Pinning In Co-Doped Fese0.5te0.5 Superconducting Single Crystals, Lina Sang, Pankaj Maheswari, Zhenwei Yu, Fei Yun, Yibing Zhang, Shi Xue Dou, Chuanbing Cai, V P. Awana, Xiaolin Wang
Australian Institute for Innovative Materials - Papers
Point defect pinning centers are the key factors responsible for the flux pinning and critical current density in type II superconductors. The introduction of the point defects and increasing their density without any changes to the superconducting transition temperature T c , irreversibility field H irr , and upper critical field H c2, would be ideal to gain insight into the intrinsic point-defect-induced pinning mechanism. In this work, we present our investigations on the critical current density J c , H c2 , H irr , the activation energy U 0 , and the flux pinning mechanism in Fe 1-x …
Origin Of Photoelectrochemical Generation Of Dihydrogen By A Dye-Sensitized Photocathode Without An Intentionally Introduced Catalyst, Dijon A. Hoogeveen, Maxime Fournier, Shannon A. Bonke, Andrew Nattestad, Amaresh Mishra, Peter Bauerle, Leone Spiccia, Attila J. Mozer, Alexandr N. Simonov
Origin Of Photoelectrochemical Generation Of Dihydrogen By A Dye-Sensitized Photocathode Without An Intentionally Introduced Catalyst, Dijon A. Hoogeveen, Maxime Fournier, Shannon A. Bonke, Andrew Nattestad, Amaresh Mishra, Peter Bauerle, Leone Spiccia, Attila J. Mozer, Alexandr N. Simonov
Australian Institute for Innovative Materials - Papers
Dye-sensitized photocathodes have been observed on several occasions to sustain light-driven H 2 generation without intentionally introduced catalysts. Herein, plausible mechanisms addressing this phenomenon are probed by a combination of long-term photoelectrochemical measurements with concurrent gas chromatography, transient absorption spectroscopy, and inductively coupled mass spectrometry using a perylenemonoimide-sexithiophene-triphenylamine (PMI-6T-TPA) sensitized NiO electrode. The experimental evidence obtained discounts the possibility for direct reduction of hydrogen by the dye and demonstrates that the availability of interfaces between dye molecules and any electrically disconnected NiO particles exposed to the electrolyte solution is critical for photoelectrocatalytic H 2 generation. These interfaces are postulated to …
Wet-Spun Biofiber For Torsional Artificial Muscles, Azadehsadat Mirabedini, Shazed Md Aziz, Geoffrey M. Spinks, Javad Foroughi
Wet-Spun Biofiber For Torsional Artificial Muscles, Azadehsadat Mirabedini, Shazed Md Aziz, Geoffrey M. Spinks, Javad Foroughi
Australian Institute for Innovative Materials - Papers
The demands for new types of artificial muscles continue to grow and novel approaches are being enabled by the advent of new materials and novel fabrication strategies. Self-powered actuators have attracted significant attention due to their ability to be driven by elements in the ambient environment such as moisture. In this study, we demonstrate the use of twisted and coiled wet-spun hygroscopic chitosan fibers to achieve a novel torsional artificial muscle. The coiled fibers exhibited significant torsional actuation where the free end of the coiled fiber rotated up to 1155 degrees per mm of coil length when hydrated. This value …
Gallium-Doped Li7la3zr2o12 Garnet-Type Electrolytes With High Lithium-Ion Conductivity, Jiang-Fang Wu, En-Yi Chen, Yao Yu, Lin Liu, Yue Wu, Wei Kong Pang, Vanessa K. Peterson, Xin Guo
Gallium-Doped Li7la3zr2o12 Garnet-Type Electrolytes With High Lithium-Ion Conductivity, Jiang-Fang Wu, En-Yi Chen, Yao Yu, Lin Liu, Yue Wu, Wei Kong Pang, Vanessa K. Peterson, Xin Guo
Australian Institute for Innovative Materials - Papers
Owing to their high conductivity, crystalline Li7–3xGaxLa3Zr2O12 garnets are promising electrolytes for all-solid-state lithium-ion batteries. Herein, the influence of Ga doping on the phase, lithium-ion distribution, and conductivity of Li7–3xGaxLa3Zr2O12 garnets is investigated, with the determined concentration and mobility of lithium ions shedding light on the origin of the high conductivity of Li7–3xGaxLa3Zr2O12. When the Ga concentration exceeds 0.20 Ga per formula unit, the garnet-type material is found to …
Effects Of Fluorine And Chromium Doping On The Performance Of Lithium-Rich Li1+Xmo2(M = Ni, Mn, Co) Positive Electrodes, Wei Kong Pang, Hsiu-Fen Lin, Vanessa K. Peterson, Cheng-Zhang Lu, Chia-Erh Liu, Shih-Chieh Liao, Jin Chen
Effects Of Fluorine And Chromium Doping On The Performance Of Lithium-Rich Li1+Xmo2(M = Ni, Mn, Co) Positive Electrodes, Wei Kong Pang, Hsiu-Fen Lin, Vanessa K. Peterson, Cheng-Zhang Lu, Chia-Erh Liu, Shih-Chieh Liao, Jin Chen
Australian Institute for Innovative Materials - Papers
Lithium-rich metal oxides Li 1+z MO 2 (M = Ni, Co Mn, etc) are promising positive electrode materials for high-energy lithium-ion batteries, with capacities of 250-300 mAh.g -1 that closely approach theoretical intercalation limits. Unfortunately, these materials suffer severe capacity fade on cycling, amongst other performance issues. Whilst ion substitution can improve the performance of many of these materials, the underlying mechanisms of property modification are not completely understood. In this work we show enhanced performance of the Li 1+z MO 2 electrode, consisting of Li 2 MnO 3 (with C2/m space group) and LiMO 2 (with R3m space group) …
Bn Nanosheet/Polymer Films With Highly Anisotropic Thermal Conductivity For Thermal Management Applications, Yuanpeng Wu, Ye Xue, Si Qin, Dan Liu, Xuebin Wang, Xiao Hu, Jingliang Li, Xungai Wang, Yoshio Bando, Dmitri Golberg, Ying I. Chen, Yury Gogotsi, Weiwei Lei
Bn Nanosheet/Polymer Films With Highly Anisotropic Thermal Conductivity For Thermal Management Applications, Yuanpeng Wu, Ye Xue, Si Qin, Dan Liu, Xuebin Wang, Xiao Hu, Jingliang Li, Xungai Wang, Yoshio Bando, Dmitri Golberg, Ying I. Chen, Yury Gogotsi, Weiwei Lei
Australian Institute for Innovative Materials - Papers
The development of advanced thermal transport materials is a global challenge. Two-dimensional nanomaterials have been demonstrated as promising candidates for thermal management applications. Here, we report a boron nitride (BN) nanosheet/polymer composite film with excellent flexibility and toughness prepared by vacuum-assisted filtration. The mechanical performance of the composite film is highly flexible and robust. It is noteworthy that the film exhibits highly anisotropic properties, with superior in-plane thermal conductivity of around 200 W m -1 K -1 and extremely low through-plane thermal conductivity of 1.0 W m -1 K -1 , making this material an excellent candidate for thermal management …
Electrochemically Inert G-C3n4 Promotes Water Oxidation Catalysis, Yaping Chen, Qian Zhou, Guoqiang Zhao, Zhenwei Yu, Xiaolin Wang, Shi Xue Dou, Wenping Sun
Electrochemically Inert G-C3n4 Promotes Water Oxidation Catalysis, Yaping Chen, Qian Zhou, Guoqiang Zhao, Zhenwei Yu, Xiaolin Wang, Shi Xue Dou, Wenping Sun
Australian Institute for Innovative Materials - Papers
Electrode surface wettability is critically important for heterogeneous electrochemical reactions taking place in aqueous and nonaqueous media. Herein, electrochemically inert g-C 3 N 4 (GCN) is successfully demonstrated to significantly enhance water oxidation by constructing a superhydrophilic catalyst surface and promoting substantial exposure of active sites. As a proof-of-concept application, superhydrophilic GCN/Ni(OH) 2 (GCNN) hybrids with monodispersed Ni(OH) 2 nanoplates strongly anchored on GCN are synthesized for enhanced water oxidation catalysis. Owing to the superhydrophilicity of functionalized GCN, the surface wettability of GCNN (contact angle 0°) is substantially improved as compared with bare Ni(OH) 2 (contact angle 21°). Besides, GCN …
Additive Manufacturing, Modeling And Performance Evaluation Of 3d Printed Fins For Surfboards, Reece D. Gately, Stephen T. Beirne, Geoff Latimer, Matthew Shirlaw, Buyung Kosasih, Andrew T. Warren, Julie R. Steele, Marc In Het Panhuis
Additive Manufacturing, Modeling And Performance Evaluation Of 3d Printed Fins For Surfboards, Reece D. Gately, Stephen T. Beirne, Geoff Latimer, Matthew Shirlaw, Buyung Kosasih, Andrew T. Warren, Julie R. Steele, Marc In Het Panhuis
Australian Institute for Innovative Materials - Papers
We demonstrate that Additive Manufacturing (3D printing) is a viable approach to rapidly prototype personalised fins for surfboards. Surfing is an iconic sport that is extremely popular in coastal regions around the world. We use computer aided design and 3D printing of a wide range of composite materials to print fins for surfboards, e.g. ABS, carbon fibre, fibre glass and amorphous thermoplastic poly(etherimide) resins. The mechanical characteristics of our 3D printed fins were found to be comparable to commercial fins. Computational fluid dynamics was employed to calculate longitudinal (drag) and tangential (turning) forces, which are important for surfboard maneuverability, stability …
Investigations Into The Electrochemical Etching Process Of P-Type Silicon Using Ethanol-Surfactant Solutions, Sivakumar Balakrishnan, Yurii K. Gun'ko, Gerhard F. Swiegers, Tatiana S. Perova
Investigations Into The Electrochemical Etching Process Of P-Type Silicon Using Ethanol-Surfactant Solutions, Sivakumar Balakrishnan, Yurii K. Gun'ko, Gerhard F. Swiegers, Tatiana S. Perova
Australian Institute for Innovative Materials - Papers
In this work, the electrochemical etching of p-type silicon was performed in aqueous ethanol-surfactant solutions and the dependence of morphology and luminescent properties of porous silicon with respect to the etching parameters and silicon resistivities have been studied. The obtained porous silicon structures have been studied using various characterisation techniques such as SEM (Scanning Electron Microscopy) and Photoluminescence (PL) spectroscopy.
Dynamic Magneto-Optical Imaging Of Superconducting Thin Films, Frederick Wells, Alexey V. Pan, Stephen Wilson, Igor Golovchanskiy, Sergey Fedoseev, Anatoly B. Rosenfeld
Dynamic Magneto-Optical Imaging Of Superconducting Thin Films, Frederick Wells, Alexey V. Pan, Stephen Wilson, Igor Golovchanskiy, Sergey Fedoseev, Anatoly B. Rosenfeld
Australian Institute for Innovative Materials - Papers
We present a novel method for analysis of superconducting thin films using dynamic magneto-optical imaging, revealing hallmarks of flux penetration with temporal resolution around 1 ms (in the present work) or better. This method involves investigation of transient field and dynamic current distributions, which are calculated by an inversion procedure on the Biot-Savart Law, which we show to be valid under dynamic conditions. We compare and discuss the flux front penetration speed and evolution of current distribution in high quality YBa2Cu3O${}_{7-\delta }$ thin films with that of samples deliberately damaged in such a way as to reduce critical current density …
Ambient Synthesis Of A Multifunctional 1d/2d Hierarchical Ag-Ag2s Nanowire/Nanosheet Heterostructure With Diverse Applications, Jinyan Xiong, Chao Han, Weijie Li, Qiao Sun, Jun Chen, Shulei Chou, Zhen Li, S X. Dou
Ambient Synthesis Of A Multifunctional 1d/2d Hierarchical Ag-Ag2s Nanowire/Nanosheet Heterostructure With Diverse Applications, Jinyan Xiong, Chao Han, Weijie Li, Qiao Sun, Jun Chen, Shulei Chou, Zhen Li, S X. Dou
Australian Institute for Innovative Materials - Papers
A new type of unique 1D/2D hierarchical Ag-Ag2S heterostructures is fabricated by an extremely simple solution route under ambient conditions. The morphology, size, crystal structure and composition of the products were comprehensively investigated, and it was found that the reaction time and the amount of S powder play crucial roles in the formation of well-defined 1D/2D hierarchical Ag-Ag2S heterostructures. The diffusion and Ostwald ripening processes dominate the evolution of the heterostructure. The resultant 1D/2D Ag-Ag2S hybrids exhibit great potential in Li/Na ion battery anodes, SERS detection and decoloration towards organic dyes.
Silicon Monoxide-A Convenient Precursor For Large Scale Synthesis Of Near Infrared Emitting Monodisperse Silicon Nanocrystals, Wei Sun, Chenxi Qian, Xiao Sherri Cui, Liwei Wang, Muan Wei, Gilberto Casillas, Amr S. Helmy, Geoffrey A. Ozin
Silicon Monoxide-A Convenient Precursor For Large Scale Synthesis Of Near Infrared Emitting Monodisperse Silicon Nanocrystals, Wei Sun, Chenxi Qian, Xiao Sherri Cui, Liwei Wang, Muan Wei, Gilberto Casillas, Amr S. Helmy, Geoffrey A. Ozin
Australian Institute for Innovative Materials - Papers
While silicon nanocrystals (ncSi) embedded in silicon dioxide thin films have been intensively studied in physics, the potential of batch synthesis of silicon nanocrystals from the solid-state disproportionation of SiO powder has not drawn much attention in chemistry. Herein we describe some remarkable effects observed in the diffraction, microscopy and spectroscopy of SiO powder upon thermal processing in the temperature range 850-1100 °C. Quantum confinement effects and structural changes of the material related to the size of the silicon nanocrystals nucleated and grown in this way were established by Photoluminescence (PL), Raman, FTIR and UV-Visible spectroscopy, PXRD and STEM, pinpointing …
Intrinsically Core-Shell Plasmonic Dielectric Nanostructures With Ultrahigh Refractive Index, Zengji Yue, Boyuan Cai, Lan Wang, Xiaolin Wang, Min Gu
Intrinsically Core-Shell Plasmonic Dielectric Nanostructures With Ultrahigh Refractive Index, Zengji Yue, Boyuan Cai, Lan Wang, Xiaolin Wang, Min Gu
Australian Institute for Innovative Materials - Papers
Topological insulators are a new class of quantum material s with metallic (edge) surface states and insulating bulk states. They demonstrate a variety of novel electronic and optical properties, which make them highly promising electronic, spintronic, and optoelectronic materials. We report on a novel conic plasmonic nanostructure that is made of bulk-insulating topological insulators and has an intrinsic core-shell formation. The insulating (dielectric) core of the nanocone displays an ultrahigh refractive index of up to 5.5 in the near-infrared frequency range. On the metallic shell, plasmonic response and strong backward light scattering were observed in the visible frequency range. Through …
Indirect-Direct Band Transformation Of Few-Layer Biocl Under Biaxial Strain, Zhongfei Xu, Weichang Hao, Qianfan Zhang, Zhongheng Fu, Haifeng Feng, Yi Du, S X. Dou
Indirect-Direct Band Transformation Of Few-Layer Biocl Under Biaxial Strain, Zhongfei Xu, Weichang Hao, Qianfan Zhang, Zhongheng Fu, Haifeng Feng, Yi Du, S X. Dou
Australian Institute for Innovative Materials - Papers
Being a new two-dimensional layered compounds, the tunable indirect-direct band transformation of BiOCl with different layers can be realized by introducing the biaxial tensile or compressive strains. The band structure and stability of BiOCl with different layers are first researched to clarify the influence of layer numbers. A phase transformation of bilayer BiOCl and metallic characteristic for all are observed under large tensile and compressive strains, respectively. In addition, bond length, interlayer spacing, and band decomposed charge density are calculated to analyze the mechanism behind these phenomena. The results indicate that the band structure transformation is primarily related to the …
The Magneto-Structural Transition In Mn1-Xfexcoge, Qing Yon Ren, Wayne D. Hutchison, Jian Li Wang, Andrew J. Studer, M F. Md Din, S Munoz Perez, John M. Cadogan, Stewart J. Campbell
The Magneto-Structural Transition In Mn1-Xfexcoge, Qing Yon Ren, Wayne D. Hutchison, Jian Li Wang, Andrew J. Studer, M F. Md Din, S Munoz Perez, John M. Cadogan, Stewart J. Campbell
Australian Institute for Innovative Materials - Papers
Large refrigeration capacities, between 212(30) J kg-1 and 261(40) J kg-1 for a magnetic field change from 0 T to 5 T, were obtained in Mn1-xFexCoGe (x = 0.01, 0.02, 0.03 and 0.04) compounds. A partial magnetic phase diagram has been derived on the basis of magnetic transition and martensitic transformation temperatures determined from differential scanning calorimetry (200 K to 450 K), variable temperature x-ray diffraction (20 K to 310 K) and magnetisation measurements (5 K to 340 K; 0.01 T). Mn1-xFexCoGe compounds with compositions in the range x = 0.01 to 0.03 exhibit magneto-structural transitions. Neutron diffraction experiments were …
Elemental Distributions Within Multiphase Quaternary Pb Chalcogenide Thermoelectric Materials Determined Through Three-Dimensional Atom Probe Tomography, Sima Aminorroaya-Yamini, Tong Li, David R. G Mitchell, Julie M. Cairney
Elemental Distributions Within Multiphase Quaternary Pb Chalcogenide Thermoelectric Materials Determined Through Three-Dimensional Atom Probe Tomography, Sima Aminorroaya-Yamini, Tong Li, David R. G Mitchell, Julie M. Cairney
Australian Institute for Innovative Materials - Papers
Nanostructured multiphase p-type lead chalcogenides have shown the highest efficiencies amongst thermoelectric materials. However, their electronic transport properties have been described assuming homogenous distribution of dopants between phases. Here, we have analyzed elemental distributions in precipitates and matrices of nanostructured multiphase quaternary Pb chalcogenides doped to levels below and above the solubility limit of the matrix, using three-dimensional atom probe tomography. We demonstrate that partitioning of sodium and selenium occur between the matrix and secondary phase in both lightly- and heavily-doped compounds and that the concentrations of sodium and selenium in precipitates are higher than those in the matrices. This …
Tuning The Morphology Of Co3o4 On Ni Foam For Supercapacitor Application, Zheyin Yu, Zhenxiang Cheng, Zhixin Tai, Xiaolin Wang, Chandrasekar Mayandi Subramaniyam, Chunsheng Fang, Shaymaa Al-Rubaye, Xiaotian Wang, S X. Dou
Tuning The Morphology Of Co3o4 On Ni Foam For Supercapacitor Application, Zheyin Yu, Zhenxiang Cheng, Zhixin Tai, Xiaolin Wang, Chandrasekar Mayandi Subramaniyam, Chunsheng Fang, Shaymaa Al-Rubaye, Xiaotian Wang, S X. Dou
Australian Institute for Innovative Materials - Papers
In this work, NH4F was used as a vital additive to control the morphology of Co3O4 precursors on Ni foam in a conventional hydrothermal reaction, and then, via thermal decomposition, to obtain Co3O4 material. The amount of NH4F plays a pivotal role in the formed morphology of the Co3O4 precursors, and four morphologies of Co3O4 were obtained through close control of the amount of additive: nanowires, thin nanowire-clusters, thick nanowire-clusters, and fan-like bulks. The morphological evolution process of the Co3O4 precursors has been investigated according to their intermediates at different reaction stages, and some novel growth mechanisms are proposed: (1) …
Host Structural Stabilization Of Li1.232mn0.615ni0.154o2 Through K-Doping Attempt: Toward Superior Electrochemical Performances, Zhuo Zheng, Xiao Dong Guo, Yan Jun Zhong, Wei-Bo Hua, Chong-Heng Shen, Shulei Chou, Xiu-Shan Yang
Host Structural Stabilization Of Li1.232mn0.615ni0.154o2 Through K-Doping Attempt: Toward Superior Electrochemical Performances, Zhuo Zheng, Xiao Dong Guo, Yan Jun Zhong, Wei-Bo Hua, Chong-Heng Shen, Shulei Chou, Xiu-Shan Yang
Australian Institute for Innovative Materials - Papers
Lithium-rich layered cathodes are known famously for its superior capacity over traditional layered oxides but trapped for lower initial coulombic efficiency, poorer rate capability and worse cyclic stability in spite of diverse attempts. Herein, a new K-stabilized Li-rich layered cathode synthesized through a simple oxalate co-precipitation is reported for its super electrochemical performances. Compared with pristine Li-rich layered cathode, K-stabilized one reaches a higher initial coulombic efficiency of 87% from 76% and outruns for 94% of capacity retention and 244 mAh g-1 of discharge capacity at 0.5C after 100 cycles. Moreover, 133 mAh g-1 of discharge capacity can be delivered …
A Green And Facile Way To Prepare Granadilla-Like Silicon-Based Anode Materials For Li-Ion Batteries, Lei Zhang, Ranjusha Rajagopalan, Haipeng Guo, Xianluo Hu, S X. Dou, Hua-Kun Liu
A Green And Facile Way To Prepare Granadilla-Like Silicon-Based Anode Materials For Li-Ion Batteries, Lei Zhang, Ranjusha Rajagopalan, Haipeng Guo, Xianluo Hu, S X. Dou, Hua-Kun Liu
Australian Institute for Innovative Materials - Papers
A yolk-shell-structured carbon@void@silicon (CVS) anode material in which a void space is created between the inside silicon nanoparticle and the outer carbon shell is considered as a promising candidate for Li-ion cells. Untill now, all the previous yolk-shell composites were fabricated through a templating method, wherein the SiO2 layer acts as a sacrificial layer and creates a void by a selective etching method using toxic hydrofluoric acid. However, this method is complex and toxic. Here, a green and facile synthesis of granadilla-like outer carbon coating encapsulated silicon/carbon microspheres which are composed of interconnected carbon framework supported CVS nanobeads is reported. …
Hierarchical Nafion Enhanced Carbon Aerogels For Sensing Applications, Bo Weng, Ailing Ding, Yuqing Liu, Jianglin Diao, Joselito M. Razal, King Tong Lau, Roderick L. Shepherd, Changming Li, Jun Chen
Hierarchical Nafion Enhanced Carbon Aerogels For Sensing Applications, Bo Weng, Ailing Ding, Yuqing Liu, Jianglin Diao, Joselito M. Razal, King Tong Lau, Roderick L. Shepherd, Changming Li, Jun Chen
Australian Institute for Innovative Materials - Papers
This work describes the fabrication of hierarchical 3D Nafion enhanced carbon aerogels (NECAGs) for sensing applications via a fast freeze drying method. Graphene oxide, multiwalled carbon nanotubes and Nafion were mixed and extruded into liquid nitrogen followed by the removal of ice crystals by freeze drying. The addition of Nafion enhanced the mechanical strength of NECAGs and effective control of the cellular morphology and pore size was achieved. The resultant NECAGs demonstrated high strength, low density, and high specific surface area and can achieve a modulus of 20 kPa, an electrical conductivity of 140 S m-1, and a specific capacity …
Developments In Conducting Polymer Fibres: From Established Spinning Methods Toward Advanced Applications, Azadehsadat Mirabedini, Javad Foroughi, Gordon G. Wallace
Developments In Conducting Polymer Fibres: From Established Spinning Methods Toward Advanced Applications, Azadehsadat Mirabedini, Javad Foroughi, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Conducting polymers have received increasing attention in both fundamental research and various fields of application in recent decades, ranging in use from biomaterials to renewable energy storage devices. Processing of conducting polymers into fibrillar structures through spinning has provided some unique capabilities to their final applications. Compared with non fibrillar forms, conducting polymer fibres are expected to display improved properties arising mainly from their low dimensions, well-oriented polymer chains, light weight and large surface area to volume ratio. Spinning methods have been employed effectively to produce technological conducting fibres from nanoscale to hundreds of micrometre sizes with controlled properties. This …
General Synthesis Of Porous Mixed Metal Oxide Hollow Spheres With Enhanced Supercapacitive Properties, Qinghong Wang, Yuxuan Zhu, Jing Xue, Xinsheng Zhao, Zaiping Guo, Chao Wang
General Synthesis Of Porous Mixed Metal Oxide Hollow Spheres With Enhanced Supercapacitive Properties, Qinghong Wang, Yuxuan Zhu, Jing Xue, Xinsheng Zhao, Zaiping Guo, Chao Wang
Australian Institute for Innovative Materials - Papers
Porous mixed metal oxide (MMO) hollow spheres present high specific surface areas, abundant electrochemically active sites, and outstanding electrochemical properties, showing potential applications in energy storage. A hydro/solvothermal process, followed by a calcination process, can be a viable method for producing uniform porous metal oxide hollow spheres. Unfortunately, this method usually involves harsh synthetic conditions such as high temperature and intricate processing. Herein, we report a general and facile "ion adsorption-annealing" approach for the fabrication of uniform porous MMO hollow spheres. The size and shell thickness of the as-obtained hollow spheres can be adjusted by the carbohydrate sphere templates and …
Functional 3d Neural Mini-Tissues From Printed Gel-Based Bioink And Human Neural Stem Cells, Qi Gu, Eva Tomaskovic-Crook, Rodrigo Lozano, Yu Chen, Robert M. I Kapsa, Qi Zhou, Gordon G. Wallace, Jeremy Micah Crook
Functional 3d Neural Mini-Tissues From Printed Gel-Based Bioink And Human Neural Stem Cells, Qi Gu, Eva Tomaskovic-Crook, Rodrigo Lozano, Yu Chen, Robert M. I Kapsa, Qi Zhou, Gordon G. Wallace, Jeremy Micah Crook
Australian Institute for Innovative Materials - Papers
Direct-write printing of stem cells within biomaterials presents an opportunity to engineer tissue for in vitro modeling and regenerative medicine. Here, a first example of constructing neural tissue by printing human neural stem cells that are differentiated in situ to functional neurons and supporting neuroglia is reported. The supporting biomaterial incorporates a novel clinically relevant polysaccharide-based bioink comprising alginate, carboxymethyl-chitosan, and agarose. The printed bioink rapidly gels by stable cross-linking to form a porous 3D scaffold encapsulating stem cells for in situ expansion and differentiation. Differentiated neurons form synaptic contacts, establish networks, are spontaneously active, show a bicuculline-induced increased calcium …
Thermoelectric Signals Of State Transition In Polycrystalline Smb6, Zengji Yue, Q J. Chen, Xiaolin Wang
Thermoelectric Signals Of State Transition In Polycrystalline Smb6, Zengji Yue, Q J. Chen, Xiaolin Wang
Australian Institute for Innovative Materials - Papers
Topological Kondo insulator SmB6 has attracted quite a lot of attention from the condensed matter physics community. A number of unique electronic properties, including low-temperature resistivity anomaly, 1D electronic transport and 2D Fermi surfaces have been observed in SmB6. Here, we report on thermoelectric transport properties of polycrystalline SmB6 over a broad temperature from 300 to 2 K. An anomalous transition in the temperature-dependent Seebeck coefficient S from S(T) $\propto $ T −1 to S(T) $\propto $ T was observed around 12 K. Such a transition demonstrates a transition of conductivity from 3D metallic bulk states to 2D metallic surface …
Effective Area And Charge Density Of Dextran Sulphate Doped Pedot Modified Electrodes, Alexander R. Harris, Paul J. Molino, Robert M. I Kapsa, Graeme M. Clark, Antonio G. Paolini, Gordon G. Wallace
Effective Area And Charge Density Of Dextran Sulphate Doped Pedot Modified Electrodes, Alexander R. Harris, Paul J. Molino, Robert M. I Kapsa, Graeme M. Clark, Antonio G. Paolini, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
The performance of neural electrodes over chronic periods is poor with degrading signal-to-noise ratio and low biocompatibility. Consequently, electrodes require modification to improve their performance, biostability and biocompatibility. A large variety of doped conducting polymers have been proposed for optimising neural electrodes, but to date, none have achieved the required biostability and biocompatibility necessary for human application. Dextran sulfate is used as an antithrombotic and may be of use in improving neural electrode biocompatibility. Poly-3,4-ethylenedioxythiophene was successfully doped with dextran sulfate (PEDOT-DS) by electropolymerisation on neural electrode arrays. Deposited films increased the electrode area and displayed a rough morphology compared …