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Full-Text Articles in Physical Sciences and Mathematics
Fabrication And Characterisation Of Highly Stretchable Elastomeric Strain Sensors For Prosthetic Hand Applications, Solen Kumbay-Yildiz, Rahim Mutlu, Gursel Alici
Fabrication And Characterisation Of Highly Stretchable Elastomeric Strain Sensors For Prosthetic Hand Applications, Solen Kumbay-Yildiz, Rahim Mutlu, Gursel Alici
Australian Institute for Innovative Materials - Papers
This study reports on the fabrication and response characterisation of highly stretchable strain sensors made of two commercially available silicone rubber substrates (EcoFlex 0010, and Shin-Etsu KE-441-T) engraved with microchannels, which are filled with two conductive liquids; carbon nanofibers (CNF) in poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) dispersion (PEDOT:PSS) and liquid carbon black (CB). We experimentally quantified the electromechanical response and strain sensing performance of the sensors using the metrics of linearity, hysteresis, resolution, transient properties and repeatability. We conclude that while changing the conductive liquid mainly affects the overall resistance of the sensors, the sensors made of EcoFlex have (i) overall much …
In-Plane Graphene/Boron-Nitride Heterostructures As An Efficient Metal-Free Electrocatalyst For The Oxygen Reduction Reaction, Qiao Sun, Caixia Sun, Aijun Du, S X. Dou, Zhen Li
In-Plane Graphene/Boron-Nitride Heterostructures As An Efficient Metal-Free Electrocatalyst For The Oxygen Reduction Reaction, Qiao Sun, Caixia Sun, Aijun Du, S X. Dou, Zhen Li
Australian Institute for Innovative Materials - Papers
Exploiting metal-free catalysts for the oxygen reduction reaction (ORR) and understanding their catalytic mechanisms are vital for the development of fuel cells (FCs). Our study has demonstrated that in-plane heterostructures of graphene and boron nitride (G/BN) can serve as an efficient metal-free catalyst for the ORR, in which the C-N interfaces of G/BN heterostructures act as reactive sites. The formation of water at the heterointerface is both energetically and kinetically favorable via a four-electron pathway. Moreover, the water formed can be easily released from the heterointerface, and the catalytically active sites can be regenerated for the next cycle. Since G/BN …
High Pressure Polymorphs And Amorphization Of Upconversion Host Material Nay(Wo4)2, Fang Hong, Binbin Yue, Zhenxiang Cheng, Martin Kunz, Bin Chen, Ho-Kwang Mao
High Pressure Polymorphs And Amorphization Of Upconversion Host Material Nay(Wo4)2, Fang Hong, Binbin Yue, Zhenxiang Cheng, Martin Kunz, Bin Chen, Ho-Kwang Mao
Australian Institute for Innovative Materials - Papers
The pressure effect on the structural change of upconversion host material NaY(WO4)2 was studied by using in-situ synchrotron X-ray diffraction. A transition from the initial scheelite phase to the M-fergusonite phase occurs near 10 GPa, and another phase transition is found near 27.5 GPa, which could be an isostructural transition without symmetry change. The sample becomes amorphous when the pressure is fully released from high pressure. This work demonstrates the possibility of synthesizing various polymorph structures for non-linear optical applications with a high pressure, chemical doping, or strained thin-film nanostructure process.
Stability Of Chemically Passivated Silicon Electrodes In Aqueous Solutions: Interplay Between Bias Voltage And Hydration Of The Electrolyte, Vinicius R. Goncales, Yanfang Wu, Bakul Gupta, Stephen G. Parker, Ying Yang, Simone Ciampi, Richard D. Tilley, J Justin Gooding
Stability Of Chemically Passivated Silicon Electrodes In Aqueous Solutions: Interplay Between Bias Voltage And Hydration Of The Electrolyte, Vinicius R. Goncales, Yanfang Wu, Bakul Gupta, Stephen G. Parker, Ying Yang, Simone Ciampi, Richard D. Tilley, J Justin Gooding
Australian Institute for Innovative Materials - Papers
Chemical passivation of nonoxide semiconductors is a key prerequisite for electrochemical devices that operate in water-based electrolytes. Silicon remains the technologically most important material and organic monolayers based on the hydrosilylation of 1-alkynes have been shown to be a very effective approach to limit the thermodynamically favorable oxidation of the electrode, while still retaining efficient electron transfer across the solid/liquid interface. A large excess of a supporting electrolyte is always added to the solution in order to confine the applied potential gradient to the region close to the surface of the electrode. However, little is known about how the degree …
[111]-Oriented Pin-Pmn-Pt Crystals With Ultrahigh Dielectric Permittivity And High Frequency Constant For High-Frequency Transducer Applications, Fei Li, Shujun Zhang, Jun Luo, Xuecang Geng, Zhuo Xu, Thomas R. Shrout
[111]-Oriented Pin-Pmn-Pt Crystals With Ultrahigh Dielectric Permittivity And High Frequency Constant For High-Frequency Transducer Applications, Fei Li, Shujun Zhang, Jun Luo, Xuecang Geng, Zhuo Xu, Thomas R. Shrout
Australian Institute for Innovative Materials - Papers
The electromechanical properties of [111]-oriented tetragonal Pb(In1/2Nb1/2O3)-Pb(Mg1/3Nb2/3O3)-PbTiO3 (PIN-PMN-PT) crystals were investigated for potential high frequency ultrasonic transducers. The domain-engineered tetragonal crystals exhibit an ultrahigh free dielectric permittivity ε33 T > 10 000 with a moderate electromechanical coupling factor k33 ∼ 0.79, leading to a high clamped dielectric permittivity ε33 S of 2800, significantly higher than those of the rhombohedral relaxor-PT crystals and high-K (dielectric permittivity) piezoelectric ceramics. Of particular significance is that the [111]-oriented tetragonal crystals were found to possess high elastic stiffness, with frequency constant N33 of ∼2400 Hz m, allowing relatively easy fabrication of high-frequency transducers. In addition, no …
Tissue Engineering With Gellan Gum, Leo Stevens, Kerry J. Gilmore, Gordon G. Wallace, Marc In Het Panhuis
Tissue Engineering With Gellan Gum, Leo Stevens, Kerry J. Gilmore, Gordon G. Wallace, Marc In Het Panhuis
Australian Institute for Innovative Materials - Papers
Engineering complex tissues for research and clinical applications relies on high-performance biomaterials that are amenable to biofabrication, maintain mechanical integrity, support specific cell behaviours, and, ultimately, biodegrade. In most cases, complex tissues will need to be fabricated from not one, but many biomaterials, which collectively fulfill these demanding requirements. Gellan gum is an anionic polysaccharide with potential to fill several key roles in engineered tissues, particularly after modification and blending. This review focuses on the present state of research into gellan gum, from its origins, purification and modification, through processing and biofabrication options, to its performance as a cell scaffold …
Kinematic Molecular Manufacturing Machines, Danijel Boskovic, Sivakumar Balakrishnan, Shaoming Huang, Gerhard F. Swiegers
Kinematic Molecular Manufacturing Machines, Danijel Boskovic, Sivakumar Balakrishnan, Shaoming Huang, Gerhard F. Swiegers
Australian Institute for Innovative Materials - Papers
The principles of kinematic manufacturing machines of the type widely used since the industrial revolution are reviewed. Consideration is then given to how the principles of kinematics ('the geometry of motion') may manifest in molecular catalysts. Actions of this type involve synchronized, regular, repeated and rapid conformational flexing along geometrically optimum pathways that define a single degree of freedom. The proposition that many of the catalysts of biology, enzymes, may generally exploit a kinematic action is discussed. Thereafter, in the major portion of this work, representative abiological molecular catalysts whose actions display the characteristic features of kinematic manufacturing processes, are …
General Synthesis Of Transition Metal Oxide Ultrafine Nanoparticles Embedded In Hierarchically Porous Carbon Nanofibers As Advanced Electrodes For Lithium Storage, Guanglin Xia, Lijun Zhang, Fang Fang, Dalin Sun, Zaiping Guo, Hua-Kun Liu, Xuebin Yu
General Synthesis Of Transition Metal Oxide Ultrafine Nanoparticles Embedded In Hierarchically Porous Carbon Nanofibers As Advanced Electrodes For Lithium Storage, Guanglin Xia, Lijun Zhang, Fang Fang, Dalin Sun, Zaiping Guo, Hua-Kun Liu, Xuebin Yu
Australian Institute for Innovative Materials - Papers
A unique general, large-scale, simple, and cost-effective strategy, i.e., foaming-assisted electrospinning, for fabricating various transition metal oxides into ultrafine nanoparticles (TMOs UNPs) that are uniformly embedded in hierarchically porous carbon nanofibers (HPCNFs) has been developed. Taking advantage of the strong repulsive forces of metal azides as the pore generator during carbonization, the formation of uniform TMOs UNPs with homogeneous distribution and HPCNFs is simultaneously implemented. The combination of uniform ultrasmall TMOs UNPs with homogeneous distribution and hierarchically porous carbon nanofibers with interconnected nanostructure can effectively avoid the aggregation, dissolution, and pulverization of TMOs, promote the rapid 3D transport of both …
A Cytocompatible Robust Hybrid Conducting Polymer Hydrogel For Use In A Magnesium Battery, Changchun Yu, Caiyun Wang, Xiao Liu, Xiaoteng Jia, Sina Naficy, Kewei Shu, Maria Forsyth, Gordon G. Wallace
A Cytocompatible Robust Hybrid Conducting Polymer Hydrogel For Use In A Magnesium Battery, Changchun Yu, Caiyun Wang, Xiao Liu, Xiaoteng Jia, Sina Naficy, Kewei Shu, Maria Forsyth, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
A cytocompatible robust hybrid conducting polymer hydrogel, polypyrrole/poly(3,4-ethylenedioxythiophene) is developed. This hydrogel is suitable for electrode-cellular applications. It demonstrates a high battery performance when coupled with a bioresorbable Mg alloy in phosphate-buffered saline. A combination of suitable mechanical and electrochemical properties makes this hydrogel a promising material for bionic applications.
3-D Structured Sno2-Polypyrrole Nanotubes Applied In Na-Ion Batteries, Boyang Ruan, Haipeng Guo, Qiannan Liu, Dongqi Shi, Shulei Chou, Hua-Kun Liu, Guohua Chen, Jiazhao Wang
3-D Structured Sno2-Polypyrrole Nanotubes Applied In Na-Ion Batteries, Boyang Ruan, Haipeng Guo, Qiannan Liu, Dongqi Shi, Shulei Chou, Hua-Kun Liu, Guohua Chen, Jiazhao Wang
Australian Institute for Innovative Materials - Papers
SnO2-coated polypyrrole (PPy) with a three-dimensional (3-D) structured nanotube network has been prepared via a facile hydrothermal method and tested as an anode material for Na-ion batteries. The crystalline SnO2 nanoparticles (less than 25 nm in size) are distributed uniformly on the surfaces of the PPy tubes. When it is used as an anode material for sodium-ion batteries (SIBs), the composite electrode can deliver a good reversible capacity of nearly 288 mA h g-1 when discharging at 100 mA g-1, with more than 69.1% capacity retention and stable coulombic efficiency of 99.6% after 150 cycles. The good electrochemical performance compared …
Integrated Carbon/Red Phosphorus/Graphene Aerogel 3d Architecture Via Advanced Vapor-Redistribution For High-Energy Sodium-Ion Batteries, Hong Gao, Tengfei Zhou, Yang Zheng, Yuqing Liu, Jun Chen, Hua-Kun Liu, Zaiping Guo
Integrated Carbon/Red Phosphorus/Graphene Aerogel 3d Architecture Via Advanced Vapor-Redistribution For High-Energy Sodium-Ion Batteries, Hong Gao, Tengfei Zhou, Yang Zheng, Yuqing Liu, Jun Chen, Hua-Kun Liu, Zaiping Guo
Australian Institute for Innovative Materials - Papers
Sodium ion batteries (SIBs), a potential alternative to lithium ion batteries (LIBs), have attracted remarkable attention recently due to the abundant natural resources for their precursors and their low cost.[1-3] The requirement of feasible electrode materials with high sodium storage capacity and good cycling stability has promoted the exploration of various electrode materials for SIBs.
Collapse And Reappearance Of Magnetic Orderings In Spin Frustrated Tbmno3 Induced By Fe Substitution, Fang Hong, Binbin Yue, Jian Li Wang, Andrew J. Studer, Chunsheng Fang, Xiaolin Wang, Shi Xue Dou, Zhenxiang Cheng
Collapse And Reappearance Of Magnetic Orderings In Spin Frustrated Tbmno3 Induced By Fe Substitution, Fang Hong, Binbin Yue, Jian Li Wang, Andrew J. Studer, Chunsheng Fang, Xiaolin Wang, Shi Xue Dou, Zhenxiang Cheng
Australian Institute for Innovative Materials - Papers
We studied the temperature dependent magnetic phase evolution in spin frustrated TbMnO3 affected by Fe doping via powder neutron diffraction. With the introduction of Fe (10% and 20%), the long range incommensurate magnetic orderings collapse. When the Fe content is increased to 30%, a long-range antiferromagnetic ordering develops, while a spin reorientation transition is found near 35 K from a canted G-type antiferromagnetic ordering to a collinear G-type antiferromagnetic ordering. This work demonstrates the complex magnetic interactions existing in transition metal oxides, which helps to understand the frustrated spin states in other similar systems and design magnetic materials as well.
3d Printed Flexure Hinges For Soft Monolithic Prosthetic Fingers, Rahim Mutlu, Gursel Alici, Marc In Het Panhuis, Geoffrey M. Spinks
3d Printed Flexure Hinges For Soft Monolithic Prosthetic Fingers, Rahim Mutlu, Gursel Alici, Marc In Het Panhuis, Geoffrey M. Spinks
Australian Institute for Innovative Materials - Papers
Mechanical compliance is one of the primary properties of structures in nature playing a key role in their efficiency. This study investigates a number of commonly used flexure hinges to determine a flexure hinge morphology, which generates large displacements under a lowest possible force input. The aim of this is to design a soft and monolithic robotic finger. Fused deposition modeling, a low-cost 3D printing technique, was used to fabricate the flexure hinges and the soft monolithic robotic fingers. Experimental and finite element analyses suggest that a nonsymmetric elliptical flexure hinge is the most suitable type for use in the …
Electrical Stimulation Enhances The Acetylcholine Receptors Available For Neuromuscular Junction Formation, Rodrigo Lozano, Kerry J. Gilmore, Brianna C. Thompson, Elise M. Stewart, Aaron Waters, Mario I. Romero-Ortega, Gordon G. Wallace
Electrical Stimulation Enhances The Acetylcholine Receptors Available For Neuromuscular Junction Formation, Rodrigo Lozano, Kerry J. Gilmore, Brianna C. Thompson, Elise M. Stewart, Aaron Waters, Mario I. Romero-Ortega, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Neuromuscular junctions (NMJ) are specialized synapses that link motor neurons with muscle fibers. These sites are fundamental to human muscle activity, controlling swallowing and breathing amongst many other vital functions. Study of this synapse formation is an essential area in neuroscience; the understanding of how neurons interact and control their targets during development and regeneration are fundamental questions. Existing data reveals that during initial stages of development neurons target and form synapses driven by biophysical and biochemical cues, and during later stages they require electrical activity to develop their functional interactions. The aim of this study was to investigate the …
Mechanical Stiffness Augmentation Of A 3d Printed Soft Prosthetic Finger, Rahim Mutlu, Solen Kumbay-Yildiz, Gursel Alici, Marc In Het Panhuis, Geoffrey M. Spinks
Mechanical Stiffness Augmentation Of A 3d Printed Soft Prosthetic Finger, Rahim Mutlu, Solen Kumbay-Yildiz, Gursel Alici, Marc In Het Panhuis, Geoffrey M. Spinks
Australian Institute for Innovative Materials - Papers
Soft robotics, as a multi-disciplinary research area, has recently gained a significant momentum due to offering unconventional characteristics relative to rigid robots such as a resilient, highly dexterous, compliant and safer interaction with humans and their physical environments. However, soft robots suffer from not being able to carry their own weight which mainly depends on the modulus of elasticity of the material used to fabricate them. In this paper, we report on a practical and easy-to-implement stiffness augmentation method to enhance stiffness of soft robotic components. We fabricated a soft robotic finger which is fully compliant with flexure hinges using …
Rectification Magnetoresistance Device: Experimental Realization And Theoretical Simulation, Kun Zhang, Qikun Huang, Yi Yan, Xiaolin Wang, Jing Wang, Shi-Shou Kang, Yu-Feng Tian
Rectification Magnetoresistance Device: Experimental Realization And Theoretical Simulation, Kun Zhang, Qikun Huang, Yi Yan, Xiaolin Wang, Jing Wang, Shi-Shou Kang, Yu-Feng Tian
Australian Institute for Innovative Materials - Papers
A unique technique has been proposed to realize rectification magnetoresistance (RMR) by combining a commercial diode and a magnetoresistance component in parallel. The observed RMR could be greatly tuned in a wide range by applying direct current and alternating current simultaneously to the device. Moreover, a quantitative theoretical model has been established, which well explained both the observed RMR and the electrical manipulation behavior. The highly tunable RMR and the correlated magnetoelectric functionalities provide an alternative route for developing multi-functional spintronics devices.
Symmetric Electrodes For Electrochemical Energy-Storage Devices, Lei Zhang, Shi Xue Dou, Hua-Kun Liu, Yunhui Huang, Xianluo Hu
Symmetric Electrodes For Electrochemical Energy-Storage Devices, Lei Zhang, Shi Xue Dou, Hua-Kun Liu, Yunhui Huang, Xianluo Hu
Australian Institute for Innovative Materials - Papers
Increasing environmental problems and energy challenges have so far attracted urgent demand for developing green and efficient energy-storage systems. Among various energy-storage technologies, sodium-ion batteries (SIBs), electrochemical capacitors (ECs) and especially the already commercialized lithium-ion batteries (LIBs) are playing very important roles in the portable electronic devices or the next-generation electric vehicles. Therefore, the research for finding new electrode materials with reduced cost, improved safety, and high-energy density in these energy storage systems has been an important way to satisfy the ever-growing demands. Symmetric electrodes have recently become a research focus because they employ the same active materials as both …
Ferroelectric Characterization Of La∶Bifeo3/Bi0.5(Na0.85k0.15)0.5tio3 Nano-Composite Films, Kang Cai, Hongyang Zhao, Zhibin Ma, Hideo Kimura, Tingting Jia, Zhenxiang Cheng
Ferroelectric Characterization Of La∶Bifeo3/Bi0.5(Na0.85k0.15)0.5tio3 Nano-Composite Films, Kang Cai, Hongyang Zhao, Zhibin Ma, Hideo Kimura, Tingting Jia, Zhenxiang Cheng
Australian Institute for Innovative Materials - Papers
La0.1Bi0.9FeO3 (BFO), Bi0.5(Na0.85K0.15)0.5TiO3(BNKT) and BFO/BNKT nano-composite films were fabricated by pulsed laser deposition (PLD) method on Pt/Ti/SiO2/Si substrate. The ferroelectric properties were enhanced in BFO/BNKT compared to single layer film of BFO and BNKT. The ferroelectric domain structures were observed using piezoresponse force microscopy (PFM). The polarization reversal was time-dependent because the inhomogeneous domains with different coercivity. Evidence can also be seen in the fatigue results which showed unusual profile. The polarization increased as the increase of switching cycles because some of domains are difficult to switch using the applied field. Nano-scale piezoresponse hysteresis loops measured by PFM also revealed …
A Virtual Instrument To Standardise The Calibration Of Atomic Force Microscope Cantilevers, John E. Sader, Riccardo Borgani, Christopher T. Gibson, David B. Haviland, Michael J. Higgins, Jason I. Kilpatrick, Jianing Lu, Paul Mulvaney, Cameron J. Shearer, Ashley D. Slattery, Per-Anders Thorén, Jim Tran, Heyou Zhang, Tian Zheng
A Virtual Instrument To Standardise The Calibration Of Atomic Force Microscope Cantilevers, John E. Sader, Riccardo Borgani, Christopher T. Gibson, David B. Haviland, Michael J. Higgins, Jason I. Kilpatrick, Jianing Lu, Paul Mulvaney, Cameron J. Shearer, Ashley D. Slattery, Per-Anders Thorén, Jim Tran, Heyou Zhang, Tian Zheng
Australian Institute for Innovative Materials - Papers
Atomic force microscope (AFM) users often calibrate the spring constants of cantilevers using functionality built into individual instruments. This calibration is performed without reference to a global standard, hindering the robust comparison of force measurements reported by different laboratories. Here, we describe a virtual instrument (an internet-based initiative) whereby users from all laboratories can instantly and quantitatively compare their calibration measurements to those of others-standardising AFM force measurements-and simultaneously enabling non-invasive calibration of AFM cantilevers of any geometry. This global calibration initiative requires no additional instrumentation or data processing on the part of the user. It utilises a single website …
The Origin Of Ultrahigh Piezoelectricity In Relaxor-Ferroelectric Solid Solution Crystals, Fei Li, Shujun Zhang, Tiannan Yang, Zhuo Xu, Nan Zhang, Gang Liu, Jianjun Wang, Jian Li Wang, Zhenxiang Cheng, Zuo-Guang Ye, Jun Luo, Thomas R. Shrout, Long-Qing Chen
The Origin Of Ultrahigh Piezoelectricity In Relaxor-Ferroelectric Solid Solution Crystals, Fei Li, Shujun Zhang, Tiannan Yang, Zhuo Xu, Nan Zhang, Gang Liu, Jianjun Wang, Jian Li Wang, Zhenxiang Cheng, Zuo-Guang Ye, Jun Luo, Thomas R. Shrout, Long-Qing Chen
Australian Institute for Innovative Materials - Papers
The discovery of ultrahigh piezoelectricity in relaxor-ferroelectric solid solution single crystals is a breakthrough in ferroelectric materials. A key signature of relaxor-ferroelectric solid solutions is the existence of polar nanoregions, a nanoscale inhomogeneity, that coexist with normal ferroelectric domains. Despite two decades of extensive studies, the contribution of polar nanoregions to the underlying piezoelectric properties of relaxor ferroelectrics has yet to be established. Here we quantitatively characterize the contribution of polar nanoregions to the dielectric/piezoelectric responses of relaxor-ferroelectric crystals using a combination of cryogenic experiments and phase-field simulations. The contribution of polar nanoregions to the room-temperature dielectric and piezoelectric properties …
One-Step Bonding Of Ni Electrode To N-Type Pbte - A Step Towards Fabrication Of Thermoelectric Generators, Xavier Reales Ferreres, Sima Aminorroaya-Yamini, Mitchell John Bromley Nancarrow, C Zhang
One-Step Bonding Of Ni Electrode To N-Type Pbte - A Step Towards Fabrication Of Thermoelectric Generators, Xavier Reales Ferreres, Sima Aminorroaya-Yamini, Mitchell John Bromley Nancarrow, C Zhang
Australian Institute for Innovative Materials - Papers
PbTe-based thermoelectric materials are good candidates for harvesting waste heat at mid-range temperatures due to their high thermoelectric efficiencies. Excellent quality and reliability of the bonding between the thermoelectric material and the electrode at high temperatures are essential for manufacturing thermoelectric generators. Here, a technique has been developed to achieve high-quality bonding between PbTe and the electrode. We have successfully performed one-step sintering of nickel electrode to n-type PbTe powder using spark plasma sintering. The fabricated interphase, composed of nickel telluride, is continuous and homogeneous across the junction, without visible flaws on the electrode or in the interphase and PbTe. …
Observation Of Van Hove Singularities In Twisted Silicene Multilayers, Zhi Li, Jincheng Zhuang, Lan Chen, Zhenyi Ni, Chen Liu, Li Wang, Xun Xu, Jiaou Wang, Xiaodong Pi, Xiaolin Wang, Yi Du, Kehui Wu, Shi Xue Dou
Observation Of Van Hove Singularities In Twisted Silicene Multilayers, Zhi Li, Jincheng Zhuang, Lan Chen, Zhenyi Ni, Chen Liu, Li Wang, Xun Xu, Jiaou Wang, Xiaodong Pi, Xiaolin Wang, Yi Du, Kehui Wu, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
Interlayer interactions perturb the electronic structure of twodimensional materials and lead to new physical phenomena, such as van Hove singularities and Hofstadter's butterfly pattern. Silicene, the recently discovered two-dimensional form of silicon, is quite unique, in that silicon atoms adopt competing sp2 and sp3 hybridization states leading to a lowbuckled structure promising relatively strong interlayer interaction. In multilayer silicene, the stacking order provides an important yet rarely explored degree of freedom for tuning its electronic structures through manipulating interlayer coupling. Here, we report the emergence of van Hove singularities in the multilayer silicene created by an interlayer rotation. We demonstrate …
Interface-Enhanced Electron-Phonon Coupling And High-Temperature Superconductivity In Potassium-Coated Ultrathin Fese Films On Srtio3, Chenjia Tang, Chong Liu, Guanyu Zhou, Fangsen Li, Hao Ding, Zhi Li, Ding Zhang, Zheng Li, Canli Song, Shuaihua Ji, Ke He, Lili Wang, Xucan Ma, Qi-Kun Xue
Interface-Enhanced Electron-Phonon Coupling And High-Temperature Superconductivity In Potassium-Coated Ultrathin Fese Films On Srtio3, Chenjia Tang, Chong Liu, Guanyu Zhou, Fangsen Li, Hao Ding, Zhi Li, Ding Zhang, Zheng Li, Canli Song, Shuaihua Ji, Ke He, Lili Wang, Xucan Ma, Qi-Kun Xue
Australian Institute for Innovative Materials - Papers
Alkali-metal (potassium) adsorption on FeSe thin films with thickness from 2 unit cells (UC) to 4 UC on SrTiO3 grown by molecular beam epitaxy is investigated with a low-temperature scanning tunneling microscope. At appropriate potassium coverage (0.20-0.25 monolayer), the tunneling spectra of the films all exhibit a superconductinglike gap which is overall larger than 11 meV (five times the gap value of bulk FeSe) and decreases with increasing thickness, and two distinct features of characteristic phonon modes at ∼11 and ∼21 meV. The results reveal the critical role of the interface-enhanced electron-phonon coupling for possible high-temperature superconductivity in ultrathin FeSe …
Visualizing The Elongated Vortices In Γ-Ga Nanostrips, Hui-Min Zhang, Zi-Xiang Li, Jun-Ping Peng, Canli Song, Jia-Qi Guan, Zhi Li, Lili Wang, Ke He, Shuaihua Ji, Xiaowei Chen, Hong Yao, Xu-Cun Ma, Qi-Kun Xue
Visualizing The Elongated Vortices In Γ-Ga Nanostrips, Hui-Min Zhang, Zi-Xiang Li, Jun-Ping Peng, Canli Song, Jia-Qi Guan, Zhi Li, Lili Wang, Ke He, Shuaihua Ji, Xiaowei Chen, Hong Yao, Xu-Cun Ma, Qi-Kun Xue
Australian Institute for Innovative Materials - Papers
We study the magnetic response of superconducting γ -Ga via low temperature scanning tunneling microscopy and spectroscopy. The magnetic vortex cores rely substantially on the Ga geometry, and exhibit an unexpectedly large axial elongation with aspect ratio up to 40 in rectangular Ga nanostrips (width l < 100 nm). This is in stark contrast with the isotropic circular vortex core in a larger round-shaped Ga island. We suggest that the unusual elongated vortices in Ga nanostrips originate from geometric confinement effect probably via the strong repulsive interaction between the vortices and Meissner screening currents at the sample edge. Our finding provides novel conceptual insights into the geometrical confinement effect on magnetic vortices and forms the basis for the technological applications of superconductors.
Electrochemical Supercapacitor Behaviour Of Functionalized Candle Flame Carbon Soot, C Justin Raj, Byung Chul Kim, Bo-Bae Cho, Won-Je Cho, Sung Jin Kim, Sang Yeup Park, Kook Hyun Yu
Electrochemical Supercapacitor Behaviour Of Functionalized Candle Flame Carbon Soot, C Justin Raj, Byung Chul Kim, Bo-Bae Cho, Won-Je Cho, Sung Jin Kim, Sang Yeup Park, Kook Hyun Yu
Australian Institute for Innovative Materials - Papers
The electrochemical supercapacitor behaviour of bare, washed and nitric acid functionalized candle flame carbon soots were reported. Crystallinity and the morphology of the candle soots were recorded using X-ray diffraction analysis, scanning and transmission electron microscopy, respectively. The nitric acid functionalized candle soot showed an improved Brunauer-Emmett-Teller surface area of 137.93 from 87.495 m 2 g -1 of washed candle soot. The presence of various functional groups in candle soots and the development of oxygen functionalities in the functionalized candle soot were examined through Fourier transform infrared spectroscopy and energy-dispersive X-ray analysis. Raman spectra showed the characteristic peaks corresponding to …
In Vitro Pet/Mri Diagnosis And Targeted Chemotherapy For Cancer Using Radiolabeled Nanoprobe : A Theragnostic Approach, Bo-Bae Cho, Mi Moon, Justin Chellan, Sang Y. Hwang, Jung Lee, Soon Jae Jung, Byung Chul Kim, Kook Hyun Yu
In Vitro Pet/Mri Diagnosis And Targeted Chemotherapy For Cancer Using Radiolabeled Nanoprobe : A Theragnostic Approach, Bo-Bae Cho, Mi Moon, Justin Chellan, Sang Y. Hwang, Jung Lee, Soon Jae Jung, Byung Chul Kim, Kook Hyun Yu
Australian Institute for Innovative Materials - Papers
The 68 Ga-labeled iron oxide (Fe 3 O 4 ) nanocomposites ( 68 Ga(NF)HFCNP) have been fabricated for positron emission tomography (PET)/magnetic resonance imaging (MRI) diagnosis and targeted cancer therapy. These radioisotopes labeled nanocomposites with folate conjugation have improved the targeting property toward cancer cells. The chemotherapeutic drug doxorubicin (DOX) was loaded with 68 Ga-labeled Fe 3 O 4 nanoparticles ( 68 Ga(NF)HFCNP) via intermediate DOX-Fe 2+ complex. The average loading efficiency of DOX was 35% for NFHFCNP and 41% for HFCNP, respectively. In drug release profile, the release rate of DOX from the nanocomposite was increased with respect to …
Base Metal Co-Fired Multilayer Piezoelectrics, Lisheng Gao, Hanzheng Guo, Shujun Zhang, Clive A. Randall
Base Metal Co-Fired Multilayer Piezoelectrics, Lisheng Gao, Hanzheng Guo, Shujun Zhang, Clive A. Randall
Australian Institute for Innovative Materials - Papers
Piezoelectrics have been widely used in different kinds of applications, from the automobile industry to consumer electronics. The novel multilayer piezoelectrics, which are inspired by multilayer ceramic capacitors, not only minimize the size of the functional parts, but also maximize energy efficiency. Development of multilayer piezoelectric devices is at a significant crossroads on the way to achieving low costs, high efficiency, and excellent reliability. Concerning the costs of manufacturing multilayer piezoelectrics, the trend is to replace the costly noble metal internal electrodes with base metal materials. This paper discusses the materials development of metal co-firing and the progress of integrating …