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Articles 751 - 780 of 1524
Full-Text Articles in Physical Sciences and Mathematics
[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 …
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 …
Processable 2d Materials Beyond Graphene: Mos2 Liquid Crystals And Fibres, Rouhollah Jalili, Sima Aminorroaya-Yamini, Tania Benedetti Goncales, Seyed Hamed Aboutalebi, Yunfeng Chao, Gordon G. Wallace, David L. Officer
Processable 2d Materials Beyond Graphene: Mos2 Liquid Crystals And Fibres, Rouhollah Jalili, Sima Aminorroaya-Yamini, Tania Benedetti Goncales, Seyed Hamed Aboutalebi, Yunfeng Chao, Gordon G. Wallace, David L. Officer
Australian Institute for Innovative Materials - Papers
Herein, we show properly engineered MoS2 crystals can readily form liquid crystalline dispersions in water making them ideal candidates for large-scale manufacturing processes. The guideline provided here can serve as the basis to develop practical protocols to address the long-standing goal of large-scale manufacturing of 2D materials.
Knitted Carbon-Nanotube-Sheath/Spandex-Core Elastomeric Yarns For Artificial Muscles And Strain Sensing, Javad Foroughi, Geoffrey M. Spinks, Shazed Aziz, Azadehsadat Mirabedini, Mohammadali Jeiranikhameneh, Gordon G. Wallace, Mikhail E. Kozlov, Ray H. Baughman
Knitted Carbon-Nanotube-Sheath/Spandex-Core Elastomeric Yarns For Artificial Muscles And Strain Sensing, Javad Foroughi, Geoffrey M. Spinks, Shazed Aziz, Azadehsadat Mirabedini, Mohammadali Jeiranikhameneh, Gordon G. Wallace, Mikhail E. Kozlov, Ray H. Baughman
Australian Institute for Innovative Materials - Papers
Highly stretchable, actuatable, electrically conductive knitted textiles based on Spandex (SPX)/CNT (carbon nanotube) composite yarns were prepared by an integrated knitting procedure. SPX filaments were continuously wrapped with CNT aerogel sheets and supplied directly to an interlocking circular knitting machine to form three-dimensional electrically conductive and stretchable textiles. By adjusting the SPX/CNT feed ratio, the fabric electrical conductivities could be tailored in the range of 870 to 7092 S/m. The electrical conductivity depended on tensile strain, with a linear and largely hysteresis-free resistance change occurring on loading and unloading between 0% and 80% strain. Electrothermal heating of the stretched fabric …
Ruthenium Nanocrystal Decorated Vertical Graphene Nanosheets@Ni Foam As Highly Efficient Cathode Catalysts For Lithium-Oxygen Batteries, Dawei Su, Donghan Seo, Yuhang Ju, Zhao Jun Han, Kostya Ostrikov, S X. Dou, Hyojun Ahn, Zhangquan Peng, Guoxiu Wang
Ruthenium Nanocrystal Decorated Vertical Graphene Nanosheets@Ni Foam As Highly Efficient Cathode Catalysts For Lithium-Oxygen Batteries, Dawei Su, Donghan Seo, Yuhang Ju, Zhao Jun Han, Kostya Ostrikov, S X. Dou, Hyojun Ahn, Zhangquan Peng, Guoxiu Wang
Australian Institute for Innovative Materials - Papers
The electrochemical performance of lithium-oxygen (Li-O2) batteries can be markedly improved through designing the architecture of cathode electrodes with sufficient spaces to facilitate the diffusion of oxygen and accommodate the discharge products, and optimizing the cathode catalyst to promote the oxygen reduction reaction and oxygen evolution reaction (OER). Herein, we report the synthesis of ruthenium (Ru) nanocrystal-decorated vertically aligned graphene nanosheets (VGNS) grown on nickel (Ni) foam. As an effective binder-free cathode catalyst for Li-O2 batteries, the Ru-decorated VGNS@Ni foam can significantly reduce the charge overpotential via the effects on the OER and achieve high specific capacity, leading to an …
Improvement In The Transport Critical Current Density And Microstructure Of Isotopic Mg11B2 Monofilament Wires By Optimizing The Sintering Temperature, Wenbin Qiu, Hyunseock Jie, Dipakkumar Patel, Yao Lu, Vladimir Luzin, Arnaud Devred, Mehmet Somer, Mohammed Shahabuddin, Jung Ho Kim, Zongqing Ma, S X. Dou, Md Shahriar Hossain
Improvement In The Transport Critical Current Density And Microstructure Of Isotopic Mg11B2 Monofilament Wires By Optimizing The Sintering Temperature, Wenbin Qiu, Hyunseock Jie, Dipakkumar Patel, Yao Lu, Vladimir Luzin, Arnaud Devred, Mehmet Somer, Mohammed Shahabuddin, Jung Ho Kim, Zongqing Ma, S X. Dou, Md Shahriar Hossain
Australian Institute for Innovative Materials - Papers
Superconducting wires are widely used in fabricating magnetic coils in fusion reactors. In consideration of the stability of 11B against neutron irradiation and lower induced radio-activation properties, MgB2 superconductor with 11B serving as boron source is an alternative candidate to be used in fusion reactor with severe irradiation environment. In present work, a batch of monofilament isotopic Mg11B2 wires with amorphous 11B powder as precursor were fabricated using powder-in-tube (PIT) process at different sintering temperature, and the evolution of their microstructure and corresponding superconducting properties was systemically investigated. Accordingly, the best transport critical current density (Jc) = 2 x 104 …
Nanodroplets For Stretchable Superconducting Circuits, Long Ren, Jincheng Zhuang, Gilberto Casillas, Haifeng Feng, Yuqing Liu, Xun Xu, Yundan Liu, Jun Chen, Yi Du, Lei Jiang, Shi Xue Dou
Nanodroplets For Stretchable Superconducting Circuits, Long Ren, Jincheng Zhuang, Gilberto Casillas, Haifeng Feng, Yuqing Liu, Xun Xu, Yundan Liu, Jun Chen, Yi Du, Lei Jiang, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
The prospective utilization of nanoscale superconductors as micro/nanocoils or circuits with superior current density and no electrical resistance loss in next-generation electronics or electromagnetic equipment represents a fascinating opportunity for new microsystem technologies. Here, a family of superconducting liquid metals (Ga-In-Sn alloys) and their nanodroplets toward printable and stretchable superconducting micro/nanoelectronics is developed. By tuning the composition of liquid metals the highest superconducting critical temperature (Tc) in this family can be modulated and achieved as high as 6.6 K. The liquid metal nanodroplets retain their bulk superconducting properties and can be easily dispersed in different solvents as inks. The printable …
Nitrogen-Doped Graphene Ribbon Assembled Core-Sheath Mno@Graphene Scrolls As Hierarchically Ordered 3d Porous Electrodes For Fast And Durable Lithium Storage, Yun Zhang, Penghui Chen, Xu Gao, Bo Wang, Heng Liu, Haobin Wu, Hua-Kun Liu, Shi Xue Dou
Nitrogen-Doped Graphene Ribbon Assembled Core-Sheath Mno@Graphene Scrolls As Hierarchically Ordered 3d Porous Electrodes For Fast And Durable Lithium Storage, Yun Zhang, Penghui Chen, Xu Gao, Bo Wang, Heng Liu, Haobin Wu, Hua-Kun Liu, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
Graphene scroll is an emerging 1D tubular form of graphitic carbon that has potential applications in electrochemical energy storage. However, it still remains a challenge to composite graphene scrolls with other nanomaterials for building advanced electrode configuration with fast and durable lithium storage properties. Here, a transition-metal-oxide-based hierarchically ordered 3D porous electrode is designed based on assembling 1D core-sheath MnO@N-doped graphene scrolls with 2D N-doped graphene ribbons. In the resulting architecture, porous MnO nanowires confined in tubular graphene scrolls are mechanically isolated but electronically wellconnected, while the interwoven graphene ribbons offer continuous conductive paths for electron transfer in all directions. …
Improvement Of System Capacitance Via Weavable Superelastic Biscrolled Yarn Supercapacitors, Changsoon Choi, Kang Min Kim, Keon Kim, Xavier Lepró, Geoffrey M. Spinks, Ray H. Baughman, Seon Jeong Kim
Improvement Of System Capacitance Via Weavable Superelastic Biscrolled Yarn Supercapacitors, Changsoon Choi, Kang Min Kim, Keon Kim, Xavier Lepró, Geoffrey M. Spinks, Ray H. Baughman, Seon Jeong Kim
Australian Institute for Innovative Materials - Papers
Yarn-based supercapacitors having improved performance are needed for existing and emerging wearable applications. Here, we report weavable carbon nanotube yarn supercapacitors having high performance because of high loadings of rapidly accessible charge storage particles (above 90 wt% MnO2). The yarn electrodes are made by a biscrolling process that traps host MnO2 nanoparticles within the galleries of helically scrolled carbon nanotube sheets, which provide strength and electrical conductivity. Despite the high loading of brittle metal oxide particles, the biscrolled solid-state yarn supercapacitors are flexible and can be made elastically stretchable (up to 30% strain) by over-twisting to produce yarn coiling. The …
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 …
Uv Cross-Linkable Graphene/Poly(Trimethylene Carbonate) Composites For 3d Printing Of Electrically Conductive Scaffolds, Sepidar Sayyar, Miina M. Bjorninen, Suvi P. Haimi, Susanna S. Miettinen, Kerry J. Gilmore, Dirk Grijpma, Gordon G. Wallace
Uv Cross-Linkable Graphene/Poly(Trimethylene Carbonate) Composites For 3d Printing Of Electrically Conductive Scaffolds, Sepidar Sayyar, Miina M. Bjorninen, Suvi P. Haimi, Susanna S. Miettinen, Kerry J. Gilmore, Dirk Grijpma, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Conductive, flexible graphene/poly(trimethylene carbonate) (PTMC) composites were prepared. Addition of just 3 wt % graphene to PTMC oligomers functionalized with methacrylate end-groups followed by UV cross-linking resulted in more than 100% improvement in tensile strength and enhanced electrical conductivity by orders of magnitude without altering the processability of the host material. The addition of graphene also enhanced mesenchymal stem cell (MSC) attachment and proliferation. When electrical stimulation via the composite material was applied, MSC viability was not compromised, and osteogenic markers were upregulated. Using additive fabrication techniques, the material was processed into multilayer 3D scaffolds which supported MSC attachment. These …
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 …
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 …
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.
Engineering Hierarchical Hollow Nickel Sulfide Spheres For High-Performance Sodium Storage, Dan Zhang, Wenping Sun, Yu Zhang, Yuhai Dou, Yinzhu Jiang, Shi Xue Dou
Engineering Hierarchical Hollow Nickel Sulfide Spheres For High-Performance Sodium Storage, Dan Zhang, Wenping Sun, Yu Zhang, Yuhai Dou, Yinzhu Jiang, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
Sodium-ion batteries (SIBs) are considered as promising alternatives to lithium-ion batteries (LIBs) for energy storage due to the abundance of sodium, especially for grid distribution systems. The practical implementation of SIBs, however, is severely hindered by their low energy density and poor cycling stability due to the poor electrochemical performance of the existing electrodes. Here, to achieve high-capacity and durable sodium storage with good rate capability, hierarchical hollow NiS spheres with porous shells composed of nanoparticles are designed and synthesized by tuning the reaction parameters. The formation mechanism of this unique structure is systematically investigated, which is clearly revealed to …
Achieving High-Performance Room-Temperature Sodium−Sulfur Batteries With S@Interconnected Mesoporous Carbon Hollow Nanospheres, Yunxiao Wang, Jianping Yang, Weihong Lai, Shulei Chou, Qinfen Gu, Hua-Kun Liu, Dongyuan Zhao, Shi Xue Dou
Achieving High-Performance Room-Temperature Sodium−Sulfur Batteries With S@Interconnected Mesoporous Carbon Hollow Nanospheres, Yunxiao Wang, Jianping Yang, Weihong Lai, Shulei Chou, Qinfen Gu, Hua-Kun Liu, Dongyuan Zhao, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
Despite the high theoretical capacity of the sodium-sulfur battery, its application is seriously restrained by the challenges due to its low sulfur electroactivity and accelerated shuttle effect, which lead to low accessible capacity and fast decay. Herein, an elaborate carbon framework, interconnected mesoporous hollow carbon nanospheres, is reported as an effective sulfur host to achieve excellent electrochemical performance. Based on in-situ synchrotron X-ray diffraction, the mechanism of the room temperature Na/S battery is proposed to be reversible reactions between S8 and Na2S4, corresponding to a theoretical capacity of 418 mAh g-1. The cell is capable of achieving high capacity retention …
Communication: Chemisorption Of Muonium On Gold Nanoparticles: A Sensitive New Probe Of Surface Magnetism And Reactivity, M H. Dehn, D J. Arseneau, P Boni, M D. Bridges, T Buck, David L. Cortie, D G. Fleming, J A. Kelly, W A. Macfarlane, M J. Maclachlan, R M. L Mcfadden, G D. Morris, P-X Wang, J Xiao, V M. Zamarion, R F. Kiefl
Communication: Chemisorption Of Muonium On Gold Nanoparticles: A Sensitive New Probe Of Surface Magnetism And Reactivity, M H. Dehn, D J. Arseneau, P Boni, M D. Bridges, T Buck, David L. Cortie, D G. Fleming, J A. Kelly, W A. Macfarlane, M J. Maclachlan, R M. L Mcfadden, G D. Morris, P-X Wang, J Xiao, V M. Zamarion, R F. Kiefl
Australian Institute for Innovative Materials - Papers
Chemisorption of muonium onto the surface of gold nanoparticles has been observed. Muonium (u+e-), a light hydrogen-like atom, reacts chemically with uncapped 7 nm gold nanoparticles embedded in mesoporous silica (SBA-15) with a strong temperature-dependent rate. The addition rate is fast enough to allow coherent spin transfer into a diamagnetic muon state on the nanoparticle surface. The muon is well established as a sensitive probe of static or slowly fluctuating magnetic fields in bulk matter. These results represent the first muon spin rotation signal on a nanoparticle surface or any metallic surface. Only weak magnetic effects are seen on the …
Photocatalytic Oxidation Of Methane Over Silver Decorated Zinc Oxide Nanocatalysts, Xuxing Chen, Yunpeng Li, Xiaoyang Pan, David L. Cortie, Xintang Huang, Zhiguo Yi
Photocatalytic Oxidation Of Methane Over Silver Decorated Zinc Oxide Nanocatalysts, Xuxing Chen, Yunpeng Li, Xiaoyang Pan, David L. Cortie, Xintang Huang, Zhiguo Yi
Australian Institute for Innovative Materials - Papers
The search for active catalysts that efficiently oxidize methane under ambient conditions remains a challenging task for both C1 utilization and atmospheric cleansing. Here, we show that when the particle size of zinc oxide is reduced down to the nanoscale, it exhibits high activity for methane oxidation under simulated sunlight illumination, and nano silver decoration further enhances the photo-activity via the surface plasmon resonance. The high quantum yield of 8% at wavelengths < 400 nm and over 0.1% at wavelengths ¿ 470 nm achieved on the silver decorated zinc oxide nanostructures shows great promise for atmospheric methane oxidation. Moreover, the nano-particulate composites can efficiently photo-oxidize other small molecular hydrocarbons such as ethane, propane and ethylene, and in particular, can dehydrogenize methane to generate ethane, ethylene and so on. On the basis of the experimental results, a two-step photocatalytic reaction process is suggested to account for the methane photo-oxidation.
Manipulation Of Nanoscale Domain Switching Using An Electron Beam With Omnidirectional Electric Field Distribution, Zi-Bin Chen, Xiaolin Wang, Simon Peter Ringer, Xiaozhou Liao
Manipulation Of Nanoscale Domain Switching Using An Electron Beam With Omnidirectional Electric Field Distribution, Zi-Bin Chen, Xiaolin Wang, Simon Peter Ringer, Xiaozhou Liao
Australian Institute for Innovative Materials - Papers
Reversible ferroelectric domain (FD) manipulation with a high spatial resolution is critical for memory storage devices based on thin film ferroelectric materials. FD can be manipulated using techniques that apply heat, mechanical stress, or electric bias. However, these techniques have some drawbacks. Here we propose to use an electron beam with an omnidirectional electric field as a tool for erasable stable ferroelectric nanodomain manipulation. Our results suggest that local accumulation of charges contributes to the local electric field that determines domain configurations.
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.
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 …
Wearable Energy-Smart Ribbons For Synchronous Energy Harvest And Storage, Chao Li, Md. Monirul Islam, Julian Moore, Joseph Sleppy, Caleb Morrison, Konstantin K. Konstantinov, Shi Xue Dou, Chait Renduchintala, Jayan Thomas
Wearable Energy-Smart Ribbons For Synchronous Energy Harvest And Storage, Chao Li, Md. Monirul Islam, Julian Moore, Joseph Sleppy, Caleb Morrison, Konstantin K. Konstantinov, Shi Xue Dou, Chait Renduchintala, Jayan Thomas
Australian Institute for Innovative Materials - Papers
No abstract provided.
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 …
3d Printed Edible Hydrogel Electrodes, Alexander Keller, Leo Stevens, Gordon G. Wallace, Marc In Het Panhuis
3d Printed Edible Hydrogel Electrodes, Alexander Keller, Leo Stevens, Gordon G. Wallace, Marc In Het Panhuis
Australian Institute for Innovative Materials - Papers
We report on a hand-held reactive printing device used to pattern highly conductive, edible hydrogel wires formed from gellan gum, gelatin, cross-linkers and a common salt (NaCl). The conductivity of the gels when printed (190 ± 20 mS/cm) closely matched the conductivity recorded for cast systems (200 ± 19 mS/cm). Printing was observed to reduce the elastic modulus and failure strains of hydrogels under compression, but printed gels retained sufficient integrity for application as flexible conductive lines. We demonstrate that hand-held printing can utilize to pattern soft conductor elements within a simple electronic circuit.
Effect Of Tensile Load On The Actuation Performance Of Ph-Sensitive Hydrogels, Sina Naficy, Geoffrey M. Spinks
Effect Of Tensile Load On The Actuation Performance Of Ph-Sensitive Hydrogels, Sina Naficy, Geoffrey M. Spinks
Australian Institute for Innovative Materials - Papers
pH-responsive hydrogels are capable of converting chemical energy to mechanical work. To optimize their use as actuators, their response when operating against an external load must be fully characterized. Here, the actuation strain of a model pH-sensitive hydrogel as a function of different constant loads is studied. The experimental actuation strain, produced by switching the pH from 2 to 12, decreases significantly and monotonically with increasing initial tensile load. Two models are developed to predict the actuation strain as a function of applied stress. Simple mechanical models based on the change in hydrogel modulus and cross sectional area due to …
Size-Dependent Chemical Reactivity Of Silicon Nanocrystals With Water And Oxygen, Melanie L. Mastronardi, Kenneth K. Chen, Kristine Liao, Gilberto Casillas, Geoffrey A. Ozin
Size-Dependent Chemical Reactivity Of Silicon Nanocrystals With Water And Oxygen, Melanie L. Mastronardi, Kenneth K. Chen, Kristine Liao, Gilberto Casillas, Geoffrey A. Ozin
Australian Institute for Innovative Materials - Papers
A detailed investigation examines how the size of allylbenzene-capped silicon nanocrystals (ncSi:AB) affects their chemical reactivity with gaseous O2, H2O, and O2/H2O as probed by in situ luminescence spectroscopy. Specifically, changes in the photoluminescence (PL) of size-separated ncSi:AB are monitored through alterations of their PL absolute quantum yield (AQY) as well as the wavelength and intensity of their PL spectra over time. These experiments, conducted under both continuous and intermittent illumination, help elucidate the roles of O2, H2O, and mixtures of O2/H2O, with respect …