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Full-Text Articles in Engineering
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 …
Substituted Ferrocenes And Iodine As Synergistic Thermoelectrochemical Heat Harvesting Redox Couples In Ionic Liquids, E H.B Anari, Mark S. Romano, W X. Teh, J J. Black, E Jiang, Jun Chen, T Q. To, J Panchompoo, Leigh Aldous
Substituted Ferrocenes And Iodine As Synergistic Thermoelectrochemical Heat Harvesting Redox Couples In Ionic Liquids, E H.B Anari, Mark S. Romano, W X. Teh, J J. Black, E Jiang, Jun Chen, T Q. To, J Panchompoo, Leigh Aldous
Australian Institute for Innovative Materials - Papers
2016 The Royal Society of Chemistry. Combining ferrocene and iodine results in enhanced thermoelectrochemical (or thermogalvanic) waste heat harvesting abilities, for both the Seebeck coefficient and the overall power output. All systems displayed a mixture of ferrocene, ferrocenium, iodine and triiodide. The observed enhancement correlates with lower electron-density on the ferrocene; the synergistic improvement observed for mixtures of substituted ferrocenes and iodine is attributed to the formation of charge-transfer complexes. Combining dibutanoylferrocene and iodine resulted in the highest Seebeck coefficient of 1.67 mV K-1.
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 …
Systematic Elongation Of Thienyl Linkers And Their Effect On Optical And Electrochemical Properties In Carbazole-Bodipy Donor-Acceptor Systems, Alina Brzeczek, Katarzyna Piwowar, Wojciech Domagala, Mikotaj M. Mikotajczyk, Krzysztof Walczak, Pawel W. Wagner
Systematic Elongation Of Thienyl Linkers And Their Effect On Optical And Electrochemical Properties In Carbazole-Bodipy Donor-Acceptor Systems, Alina Brzeczek, Katarzyna Piwowar, Wojciech Domagala, Mikotaj M. Mikotajczyk, Krzysztof Walczak, Pawel W. Wagner
Australian Institute for Innovative Materials - Papers
Synthesis, spectral and electrochemical properties of a series of new panchromatic BODIPY donor-acceptor-donor derivatives, comprising carbazole conjugated with systematically elongated framework by thiophene-based linkers were investigated. It has been found that elongation of the π-system with one thiophene unit shifts the spectra toward near infrared, while incorporation of next thiophene derivatives has only limited influence on the lowest energy transition, causing no further shift of absorption maxima. Elongation of π-conjugation of the donor arm tunes the electron properties, influencing the ionization potential (IP) and electron affinity (EA) values of the molecules. The experimental results are supported by quantum chemical computations …
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 …
Point Defects In Epitaxial Silicene On Ag(111) Surfaces, Hongsheng Liu, Haifeng Feng, Yi Du, Jian Chen, Ke-Hui Wu, Jijun Zhao
Point Defects In Epitaxial Silicene On Ag(111) Surfaces, Hongsheng Liu, Haifeng Feng, Yi Du, Jian Chen, Ke-Hui Wu, Jijun Zhao
Australian Institute for Innovative Materials - Papers
Silicene, a counterpart of graphene, has achieved rapid development due to its exotic electronic properties and excellent compatibility with the mature silicon-based semiconductor technology. Its low room-temperature mobility of ~100 cm2 V−1 s−1, however, inhibits device applications such as in field-effect transistors. Generally, defects and grain boundaries would act as scattering centers and thus reduce the carrier mobility. In this paper, the morphologies of various point defects in epitaxial silicene on Ag(111) surfaces have been systematically investigated using first-principles calculations combined with experimental scanning tunneling microscope (STM) observations. The STM signatures for various defects in epitaxial silicene on Ag(111) surface …
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 …
Heteroaromatic Organic Compound With Conjugated Multi-Carbonyl As Cathode Material For Rechargeable Lithium Batteries, Meixiang Lv, Fen Zhang, Yiwen Wu, Mujuan Chen, Chunfeng Yao, Junmin Nan, D Shu, Ronghua Zeng, Heping Zeng, Shulei Chou
Heteroaromatic Organic Compound With Conjugated Multi-Carbonyl As Cathode Material For Rechargeable Lithium Batteries, Meixiang Lv, Fen Zhang, Yiwen Wu, Mujuan Chen, Chunfeng Yao, Junmin Nan, D Shu, Ronghua Zeng, Heping Zeng, Shulei Chou
Australian Institute for Innovative Materials - Papers
The heteroaromatic organic compound, N,N'-diphenyl-1,4,5,8-naphthalenetetra-carboxylic diimide (DP-NTCDI-250) as the cathode material of lithium batteries is prepared through a simple one-pot N-acylation reaction of 1,4,5,8-naphthalenetetra-carboxylic dianhydride (NTCDA) with phenylamine (PA) in DMF solution followed by heat treatment in 250 °C. The as prepared sample is characterized by the combination of elemental analysis, NMR, FT-IR, TGA, XRD, SEM and TEM. The electrochemical measurements show that DP-NTCDI-250 can deliver an initial discharge capacity of 170 mAh g-1 at the current density of 25 mA g-1. The capacity of 119 mAh g-1 can be retained after 100 cycles. Even at the high current density …
Ph-Responsive Fe(Iii)-Gallic Acid Nanoparticles For In Vivo Photoacoustic Imaging-Guided Photothermal Therapy, Jianfeng Zeng, Ming Cheng, Yong Wang, Ling Wen, Ling Chen, Zhen Li, Yongyou Wu, Mingyuan Gao, Zhifang Chai
Ph-Responsive Fe(Iii)-Gallic Acid Nanoparticles For In Vivo Photoacoustic Imaging-Guided Photothermal Therapy, Jianfeng Zeng, Ming Cheng, Yong Wang, Ling Wen, Ling Chen, Zhen Li, Yongyou Wu, Mingyuan Gao, Zhifang Chai
Australian Institute for Innovative Materials - Papers
pH-responsive biocompatible Fe(III)-gallic acid nanoparticles with strong near-infrared absorbance are very stable in mild acidic conditions, but easily decomposed in neutral conditions, which enables the nanoparticles to be stable in a tumor and easily metabolized in other organs, thus providing a safe nanoplatform for in vivo photoacoustic imaging/photothermal therapy theranostic applications.
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 …
A Free-Standing Graphene-Polypyrrole Hybrid Paper Via Electropolymerization With An Enhanced Areal Capacitance, Kewei Shu, Caiyun Wang, Chen Zhao, Yu Ge, Gordon G. Wallace
A Free-Standing Graphene-Polypyrrole Hybrid Paper Via Electropolymerization With An Enhanced Areal Capacitance, Kewei Shu, Caiyun Wang, Chen Zhao, Yu Ge, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Here we developed a free-standing reduced graphene oxide (rGO)-polypyrrole (PPy) hybrid paper via electropolymerization on a paper-like graphene gel. This flexible hybrid paper displayed a uniform layered structure with PPy coated onto the graphene layers. A high areal mass of 2.7 mg cm−2 could be obtained. It delivered a greatly enhanced areal capacitance of 440 mF cm−2 at 0.5 A g−1, in contrast to that 151∼198.5 mF cm−2 previously reported for graphene paper or polypyrrole-graphene paper. It can retain ∼81% of the initial capacitance at a high current density of 6 A g−1. The combined high flexibility with outstanding electrochemical …
The Origin Of Capacity Fade In The Li2mno3·Limo2 (M = Li, Ni, Co, Mn) Microsphere Positive Electrode: An Operando Neutron Diffraction And Transmission X-Ray Microscopy Study, Chih Jung Chen, Wei Kong Pang, Tatsuhiro Mori, Vanessa K. Peterson, Neeraj Sharma, Po Han Lee, She-Huang Wu, Chun Chieh Wang, Yen Fang Song, Ru-Shi Liu
The Origin Of Capacity Fade In The Li2mno3·Limo2 (M = Li, Ni, Co, Mn) Microsphere Positive Electrode: An Operando Neutron Diffraction And Transmission X-Ray Microscopy Study, Chih Jung Chen, Wei Kong Pang, Tatsuhiro Mori, Vanessa K. Peterson, Neeraj Sharma, Po Han Lee, She-Huang Wu, Chun Chieh Wang, Yen Fang Song, Ru-Shi Liu
Australian Institute for Innovative Materials - Papers
The mechanism of capacity fade of the Li2MnO3·LiMO2 (M = Li, Ni, Co, Mn) composite positive electrode within a full cell was investigated using a combination of operando neutron powder diffraction and transmission X-ray microscopy methods, enabling the phase, crystallographic, and morphological evolution of the material during electrochemical cycling to be understood. The electrode was shown to initially consist of 73(1) wt % R3m LiMO2 with the remaining 27(1) wt % C2/m Li2MnO3 likely existing as an intergrowth. Cracking in the Li2MnO3·LiMO2 electrode particle under operando microscopy observation was revealed to be initiated by the solid-solution reaction of the LiMO2 …
Polarized Raman Backscattering Selection Rules For (Hhl)-Oriented Diamond- And Zincblende-Type Crystals, Julian Steele, P Puech, Roger A. Lewis
Polarized Raman Backscattering Selection Rules For (Hhl)-Oriented Diamond- And Zincblende-Type Crystals, Julian Steele, P Puech, Roger A. Lewis
Australian Institute for Innovative Materials - Papers
Due to their interesting orientation-dependent properties, the ability to grow high-index semiconductor crystals and nanostructures extends the design palette for applications based on these materials. Notably, a source containing a systematic reporting of what the Raman tensors are for an arbitrary high-index zincblende material is yet to appear in the literature. Herein, we present the polarized Raman backscattering selection rules for arbitrary (hhl)-oriented diamond- and zincblende-type crystal surfaces and verify their correctness through experiment (up to (115)). Considering the many degrees of freedom available to common polarized micro-Raman scattering instruments, and the unique local orientation of the probed material, we …
Magnetocaloric Effect In Homn2si2 Compound With Multiple Magnetic Phase Transitions, J C. Debnath, Jian Li Wang
Magnetocaloric Effect In Homn2si2 Compound With Multiple Magnetic Phase Transitions, J C. Debnath, Jian Li Wang
Australian Institute for Innovative Materials - Papers
The structural, magnetic and magnetocaloric properties of the polycrystalline compound HoMn2Si2 have been studied. The temperature variation of magnetization and heat capacity show that below room temperature the compound under goes multiple magnetic transitions, at about 80, 15 and 3.5 K respectively. Moreover, the presence of the interesting thermomagnetic irreversibility in HoMn2Si2 is detected in the magnetization versus temperature plot, which can be ascribed to the narrow domain wall pinning effect. A broad and asymmetric peak is observed for the MCE response which might suggest the underlying first-order nature of the transition and/or the spin fluctuations of the Mn subsystem. …
Switching Of Both Local Ferroelectric And Magnetic Domains In Multiferroic Bi 0.9 La0.1 Feo3 Thin Film By Mechanical Force, Tingting Jia, Hideo Kimura, Zhenxiang Cheng, Hongyang Zhao
Switching Of Both Local Ferroelectric And Magnetic Domains In Multiferroic Bi 0.9 La0.1 Feo3 Thin Film By Mechanical Force, Tingting Jia, Hideo Kimura, Zhenxiang Cheng, Hongyang Zhao
Australian Institute for Innovative Materials - Papers
Cross-coupling of ordering parameters in multiferroic materials by multiple external stimuli other than electric field and magnetic field is highly desirable from both practical application and fundamental study points of view. Recently, mechanical force has attracted great attention in switching of ferroic ordering parameters via electro-elastic coupling in ferroelectric materials. In this work, mechanical force induced both polarization and magnetization switching were visualized in a polycrystalline multiferroic Bi0.9La0.1FeO3 thin film using a scanning probe microscopy system. The piezoresponse force microscopy and magnetic force microscopy responses suggest that both the ferroelectric domains and the magnetic domains in Bi0.9La0.1FeO3 film could be …
Defect Graphene As A Trifunctional Catalyst For Electrochemical Reactions, Yi Jia, Longzhou Zhang, Aijun Du, Guoping Gao, Jun Chen, Xuecheng Yan, Christopher L. Brown, Xiangdong Yao
Defect Graphene As A Trifunctional Catalyst For Electrochemical Reactions, Yi Jia, Longzhou Zhang, Aijun Du, Guoping Gao, Jun Chen, Xuecheng Yan, Christopher L. Brown, Xiangdong Yao
Australian Institute for Innovative Materials - Papers
The defects derived by the removal of heteroatoms from graphene have been demonstrated, both experimentally and theoretically, to be effective for all three basic electrochemical reactions, e.g., oxygen reduction (ORR), oxygen evolution (OER), hydrogen evolution (HER). Density function theory calculations further reveal that the different types of defects are essential for the individual electrocatalytic activity for ORR, OER, and HER, respectively.
Smart Fabrics And Networked Clothing: Recent Developments In Cnt-Based Fibers And Their Continual Refinement, Javad Foroughi, Teodor E. Mitew, Philip O. Ogunbona, Raad Raad, Farzad Safaei
Smart Fabrics And Networked Clothing: Recent Developments In Cnt-Based Fibers And Their Continual Refinement, Javad Foroughi, Teodor E. Mitew, Philip O. Ogunbona, Raad Raad, Farzad Safaei
Australian Institute for Innovative Materials - Papers
Virtually all human cultures routinely wear garments or some sort of attire, both for protection against the elements and as part of a complex social display of everything from class status to gender to the act of belonging to a particular subculture. Smart garments, in addition to performing their social functions, can act as transmitters, sensors, or energy-harvesting entities. Furthermore, such garments may also possess some processing capability, enabling them to perform a variety of tasks, perhaps in conjunction with cloud-based server resources.
Mechanical Force Involved Multiple Fields Switching Of Both Local Ferroelectric And Magnetic Domain In A Bi5ti3feo15 Thin Film, Tingting Jia, Hideo Kimura, Zhenxiang Cheng, Hongyang Zhao, Yoon-Hyun Kim, Minoru Osada, Takao Matsumoto, Naoya Shibata, Yuichi Ikuhara
Mechanical Force Involved Multiple Fields Switching Of Both Local Ferroelectric And Magnetic Domain In A Bi5ti3feo15 Thin Film, Tingting Jia, Hideo Kimura, Zhenxiang Cheng, Hongyang Zhao, Yoon-Hyun Kim, Minoru Osada, Takao Matsumoto, Naoya Shibata, Yuichi Ikuhara
Australian Institute for Innovative Materials - Papers
Multiferroics have received intense attention due to their great application potential in multi-state information storage devices and new types of sensors. Coupling among ferroic orders such as ferroelectricity, (anti-)ferromagnetism, ferroelasticity, etc. will enable dynamic interaction between these ordering parameters. Direct visualization of such coupling behaviour in single phase multiferroic materials is highly desirable for both applications and fundamental study. Manipulation of both ferroelectric and magnetic domains of Bi5Ti3FeO15 thin film using electric field and external mechanical force is reported, which confirms the magnetoelectric coupling in Bi5Ti3FeO15, indicates the electric and magnetic orders are coupled through ferroelasticity. Due to the anisotropic …
Ambient Aqueous Growth Of Cu2te Nanostructures With Excellent Electrocatalytic Activity Toward Sulfide Redox Shuttles, Chao Han, Yang Bai, Qiao Sun, Shaohua Zhang, Zhen Li, Lianzhou Wang, Shi Xue Dou
Ambient Aqueous Growth Of Cu2te Nanostructures With Excellent Electrocatalytic Activity Toward Sulfide Redox Shuttles, Chao Han, Yang Bai, Qiao Sun, Shaohua Zhang, Zhen Li, Lianzhou Wang, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
A new aqueous and scalable strategy to synthesize surfactant-free Cu2Te nanotubes and nanosheets at room temperature has been developed. In aqueous solution, Cu2E (E = O, S, Se) nanoparticles can be easily transformed into Cu2Te nanosheets and nanotubes via a simple anion exchange reaction under ambient conditions. The formation of Cu2Te nanosheets is ascribed to a novel exchange-peeling growth mechanism instead of simple Kirkendall effect; and the resultant nanosheets can be further rolled into nanotubes with assistance of stirring. The morphologies of Cu2Te nanosheets and nanotubes can be easily controlled by changing the synthesis parameters, such as the concentration of …