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Articles 961 - 990 of 1524
Full-Text Articles in Physical Sciences and Mathematics
Bioactive Coatings For Orthopaedic Implants-Recent Trends In Development Of Implant Coatings, Bill G. X Zhang, Damian E. Myers, Gordon G. Wallace, Milan Brandt, Peter F. M Choong
Bioactive Coatings For Orthopaedic Implants-Recent Trends In Development Of Implant Coatings, Bill G. X Zhang, Damian E. Myers, Gordon G. Wallace, Milan Brandt, Peter F. M Choong
Australian Institute for Innovative Materials - Papers
Joint replacement is a major orthopaedic procedure used to treat joint osteoarthritis. Aseptic loosening and infection are the two most significant causes of prosthetic implant failure. The ideal implant should be able to promote osteointegration, deter bacterial adhesion and minimize prosthetic infection. Recent developments in material science and cell biology have seen the development of new orthopaedic implant coatings to address these issues. Coatings consisting of bioceramics, extracellular matrix proteins, biological peptides or growth factors impart bioactivity and biocompatibility to the metallic surface of conventional orthopaedic prosthesis that promote bone ingrowth and differentiation of stem cells into osteoblasts leading to …
Thermoelectric Performance Of N-Type (Pbte)0.75(Pbs)0.15(Pbse)0.1 Composites, Sima Aminorroaya Yamini, Heng Wang, Dianta Ginting, David R. G Mitchell, S X. Dou, G. Jeffrey Snyder
Thermoelectric Performance Of N-Type (Pbte)0.75(Pbs)0.15(Pbse)0.1 Composites, Sima Aminorroaya Yamini, Heng Wang, Dianta Ginting, David R. G Mitchell, S X. Dou, G. Jeffrey Snyder
Australian Institute for Innovative Materials - Papers
Lead chalcogenides (PbQ, Q = Te, Se, S) have proved to possess high thermoelectric efficiency for both n-type and p-type compounds. Recent success in tuning of electronic band structure, including manipulating the band gap, multiple bands, or introducing resonant states, has led to a significant improvement in the thermoelectric performance of p-type lead chalcogenides compared to the n-type ones. Here, the n-type quaternary composites of (PbTe)0.75(PbS)0.15(PbSe)0.1 are studied to evaluate the effects of nanostructuring on lattice thermal conductivity, carrier mobility, and effective mass variation. The results are compared with the similar ternary systems of (PbTe)1-x(PbSe)x, (PbSe) 1-x(PbS)x, and (PbS)1-x(PbTe)x. The …
Porous Ni0.5zn0.5fe2o4 Nanospheres: Synthesis, Characterization, And Application For Lithium Storage, Min Zhang, Xuanwen Gao, Zhenfa Zi, Jianming Dai, Jiazhao Wang, Shulei Chou, Changhao Liang, Xuebin Zhu, Yuping Sun, Hua-Kun Liu
Porous Ni0.5zn0.5fe2o4 Nanospheres: Synthesis, Characterization, And Application For Lithium Storage, Min Zhang, Xuanwen Gao, Zhenfa Zi, Jianming Dai, Jiazhao Wang, Shulei Chou, Changhao Liang, Xuebin Zhu, Yuping Sun, Hua-Kun Liu
Australian Institute for Innovative Materials - Papers
Monodisperse porous Ni0.5Zn0.5Fe2O4 nanospheres have been successfully synthesized by the solvothermal method. The diameter of the nanospheres can be tuned by controlling the reactant concentration. Lower reactant concentration is favoured for the synthesis of mesoporous Ni0.5Zn0.5Fe2O4 nanospheres with higher surface area. The electrochemical results show that mesoporous Ni0.5Zn0.5Fe2O4 nanospheres exhibit high reversible specific capacity (1110 mAh g-1) for Li storage and high capacity retention, with 700 mAh g-1 retained up to 50 cycles. The excellent electrochemical properties could be attributed to the large surface area and mesoporous structure. The results suggest that Ni0.5Zn0.5Fe2O4 could be a promising high capacity anode …
Enhanced Electrochemical Properties Of Cobalt Doped Manganese Dioxide Nanowires, Byoung Chul Kim, C Justin Raj, W J. Cho, W G. Lee, Hyeon Taek Jeong, K H. Yu
Enhanced Electrochemical Properties Of Cobalt Doped Manganese Dioxide Nanowires, Byoung Chul Kim, C Justin Raj, W J. Cho, W G. Lee, Hyeon Taek Jeong, K H. Yu
Australian Institute for Innovative Materials - Papers
The various molar concentrations of cobalt doped manganese dioxide (Co-MnO2) nanostructures were synthesized by an hydrothermal technique for electrochemical supercapacitor application. The X-ray diffraction analysis showed that the samples were composed of multiphase of MnO2 with dominant reflections of γ-MnO2 structure of crystallization. The morphological studies displayed the existence of MnO 2 nanowires with the width of 10-20 nm and showing a good degree of crystallization. The electrochemical characterization was performed using cyclic voltammetry, galvanostatic charge/discharge test and impedance spectroscopy in 1 M Na2SO4 aqueous electrolyte. All the samples exhibit a typical ideal capacitive behavior with an increasing order of …
Advances In The Growth And Characterization Of Relaxor-Pt-Based Ferroelectric Single Crystals, Jun Luo, Shujun Zhang
Advances In The Growth And Characterization Of Relaxor-Pt-Based Ferroelectric Single Crystals, Jun Luo, Shujun Zhang
Australian Institute for Innovative Materials - Papers
Compared to Pb(Zr 1-x Ti x )O 3 (PZT) polycrystalline ceramics, relaxor-PT single crystals offer significantly improved performance with extremely high electromechanical coupling and piezoelectric coefficients, making them promising materials for piezoelectric transducers, sensors and actuators. The recent advances in crystal growth and characterization of relaxor-PT-based ferroelectric single crystals are reviewed in this paper with emphases on the following topics: (1) the large crystal growth of binary and ternary relaxor-PT-based ferroelectric crystals for commercialization; (2) the composition segregation in the crystals grown from such a solid-solution system and possible solutions to reduce it; (3) the crystal growth from new binary …
Fabrication And Measurement Of A Flexoelectric Micro-Pyramid Composite, Wenbin Huang, Longlong Shu, Seol Ryung Kwon, Shujun Zhang, Fuh Gwo Yuan, Xiaoning Jiang
Fabrication And Measurement Of A Flexoelectric Micro-Pyramid Composite, Wenbin Huang, Longlong Shu, Seol Ryung Kwon, Shujun Zhang, Fuh Gwo Yuan, Xiaoning Jiang
Australian Institute for Innovative Materials - Papers
A fabrication method by combining precision mechanical dicing and wet etching was developed to prepare micro-pyramid structures based on (Ba0.67Sr0.33)TiO3 ceramics. The effective piezoelectric properties of flexoelectric pyramid structures in ten micrometers scale were investigated and measured through converse flexoelectric effect. The scaling effect of the flexoelectric response was demonstrated as the structure size shrinks down. The results do suggest the great potential of flexoelectric micro pyramids as an alternative to lead-free piezoelectric material.
Converse Flexoelectric Coefficient F(1212) In Bulk Ba0.67sr0.33tio3, Longlong Shu, Wenbin Huang, Seol Ryung Kwon, Zhao Wang, Fei Li, Xiaoyong Wei, Shujun Zhang, Michael T. Lanagan, Xi Yao, Xiaoning Jiang
Converse Flexoelectric Coefficient F(1212) In Bulk Ba0.67sr0.33tio3, Longlong Shu, Wenbin Huang, Seol Ryung Kwon, Zhao Wang, Fei Li, Xiaoyong Wei, Shujun Zhang, Michael T. Lanagan, Xi Yao, Xiaoning Jiang
Australian Institute for Innovative Materials - Papers
Enhanced flexoelectricity in perovskite ceramics and single crystals has been reported before. In this letter, 3-3 ceramic-ceramic Ba0.6Sr0.4TiO3/Ni0.8Zn0.2Fe2O4 composite with a colossal permittivity was employed in the conventional pure bending experiment in order to examine the transverse flexoelectric response. The measured flexoelectric coefficient at 30 Hz is 128 μC/m and varies to 16 μC/m with the frequency increasing from 30 Hz to 120 Hz, mainly due to the inverse correlation between the permittivity and the frequency. This result reveals the permittivity dependence of flexoelectric coefficient in the frequency dispersion materials, suggesting that the giant permittivity composites can be good flexoelectric …
Enhanced Visible-Light Photocatalytic Activity Of G-C3n4/Tio2 Films, Natkritta Boonprakob, Natda Wetchakun, Sukon Phanichphant, David Wexler, Peter Sherrell, Andrew Nattestad, Jun Chen, Burapat Inceesungvorn
Enhanced Visible-Light Photocatalytic Activity Of G-C3n4/Tio2 Films, Natkritta Boonprakob, Natda Wetchakun, Sukon Phanichphant, David Wexler, Peter Sherrell, Andrew Nattestad, Jun Chen, Burapat Inceesungvorn
Australian Institute for Innovative Materials - Papers
Enhanced photocatalytic degradation of methylene blue (MB) using graphitic carbon nitride/titanium dioxide (g-C3N4/TiO2) catalyst films has been demonstrated in this present work. The g-C3N4/TiO2 composites were prepared by directly heating the mixture of melamine and pre-synthesized TiO2 nanoparticles in Ar gas flow. The g-C3N4 contents in the g-C3N4/TiO2 composites were varied as 0, 20, 50 and 70 wt%. It was found that the visible-light-induced photocatalytic degradation of MB was remarkably increased upon coupling TiO2 with g-C3N4 and the best degradation performance of ∼70% was obtained from 50 wt% g-C3N4 loading content. Results from UV–vis absorption study, Electron microscopy, Fourier transform …
Dispersion And Characterization Of Arc Discharge Single-Walled Carbon Nanotubes-Towards Conducting Transparent Films, Benedikt Rosner, Dirk Guldi, Jun Chen, Andrew Minett, Rainer H. Fink
Dispersion And Characterization Of Arc Discharge Single-Walled Carbon Nanotubes-Towards Conducting Transparent Films, Benedikt Rosner, Dirk Guldi, Jun Chen, Andrew Minett, Rainer H. Fink
Australian Institute for Innovative Materials - Papers
This study addresses a combination of a well-developed and mild dispersion method and high-quality arc discharge single-walled carbon nanotubes (SWCNTs) as starting materials. Thus, we advance in fabrication of transparent, conducting films with extraordinary low material loss during SWCNT processing. The starting material was characterized by means of thermogravimetric analysis, high-resolution transmission electron microscopy and Raman spectroscopy. The quality of the starting material and produced dispersions was evaluated by ultraviolet and visible light absorption spectroscopy and Raman spectroscopy. A transparent conductive film was fabricated by drop-casting, whereas films were obtained with electrical to optical conductivity ratios (σDC/σOp) as high as …
One-Pot Aqueous Synthesis Of Cysteine-Capped Cdte/Cds Core-Shell Nanowires, Yukai Shan, Zhen Xiao, Yongming Chuan, Hongli Li, Minglong Yuan, Zhen Li, S X. Dou
One-Pot Aqueous Synthesis Of Cysteine-Capped Cdte/Cds Core-Shell Nanowires, Yukai Shan, Zhen Xiao, Yongming Chuan, Hongli Li, Minglong Yuan, Zhen Li, S X. Dou
Australian Institute for Innovative Materials - Papers
Highly fluorescent cysteine-capped CdTe/CdS core-shell nanowires were successfully synthesized by reacting CdCl2 with NaHTe in aqueous solution under refluxing at 100 °C for 140 min. On increasing the reaction time from 10 to 140 min, CdTe/CdS nanocrystals gradually grew into nanorods and eventually completely evolved into nanowires. The nanowires have amino and carboxyl functional groups on their surfaces and can be well dispersed in aqueous solution. The as-prepared CdTe/CdS nanowires show a fluorescence quantum yield (QY) of 7.25 % due to the unique nature of cysteine and the formation of a CdS shell on the surface of the CdTe core, …
Magnetism And Magnetocaloric Effect Of Mn0.98fe0.02coge, Q Y. Ren, W D. Hutchison, Jianli Wang, S Munoz Perez, J M. Cadogan, S J. Campbell
Magnetism And Magnetocaloric Effect Of Mn0.98fe0.02coge, Q Y. Ren, W D. Hutchison, Jianli Wang, S Munoz Perez, J M. Cadogan, S J. Campbell
Australian Institute for Innovative Materials - Papers
The crystallographic and magnetic properties of Mn0.98Fe0.02CoGe have been investigated by X-ray diffraction, dc magnetization and neutron diffraction over the temperature range 20-450 K. The temperature dependence of the phase fractions of the orthorhombic and hexagonal phases is described well by a Gaussian distribution. The Mn0.98Fe0.02CoGe sample exhibits a first-order magneto-structural transition centred at TMS ∼ 297 K of FWHM ∼37 K with a magnetic entropy change of −ΔSM = 24(1) J kg−1 K−1 for ΔB = 0-5 T. Neutron diffraction indicates a ferromagnetic orthorhombic structure below TMS with only the Mn carrying magnetic moment (3.98(6) µB) at 20 K. …
Worldwide Outdoor Round Robin Study Of Organic Photovoltaic Devices And Modules, Morten V. Madsen, Suren A. Gevorgyan, R Pacios, J Ajuria, I Etxebarria, Jeff Kettle, Noel D. Bristow, Marios Neophytou, Stelios A. Choulis, Lucimara Stolz Roman, Teketel Yohannes, Andrea Cester, Pei Cheng, Xiaowei Zhan, Jiang Wu, Zhiyuan Xie, Wei-Chen Tu, Jr-Hau He, Christopher J Fell, Kenrick Anderson, Martin Hermenau, Davide Bartesaghi, L Jan Anton Koster, Florian Machui, Irene Gonzalez-Valls, Monica Lira-Cantu, Petr P. Khlyabich, Barry C. Thompson, Ritu Gupta, Kiruthika Shanmugam, Giridhar U. Kulkarni, Yulia Galagan, Antonio Urbina, Jose Abad, Roland Roesch, Harald Hoppe, P Morvillo, E Bobeico, Eugen Panaitescu, Latika Menon, Qun Luo, Zhenwu Wu, Changqii Ma, Artak Hambarian, Varuzhan Melikyan, M Hambsch, Paul L. Burn, Paul Meredith, Thomas Rath, Sebastian Dunst, Gregor Trimmel, Giorgio Bardizza, Harald Mullejans, A E. Goryachev, Ravi K. Misra, Eugene A. Katz, Katsuhiko Takagi, Shinichi Magaino, Hidenori Saito, Daisuke Aoki, Paul M. Sommeling, Jan M. Kroon, Tim Vangerven, Jean Manca, Jurgen Kesters, Wouter Maes, Olga D. Bobkova, Vasily A. Trukhanov, Dmitry Yu Paraschuk, Fernando A. Castro, James Blakesley, Sachetan M. Tuladhar, Jason Alexander Rohr, Jenny Nelson, Jiangbin Xia, Elif Alturk Parlak, Tulay Alsi Tumay, Hans-Joachim Egelhaaf, David M. Tanenbaum, Gretta Mae Ferguson, Robert Carpenter, Hongzheng Chen, Birger Zimmermann, Lionel Hirsch, Guillaume Wantz, Ziqi Sun, Pradeep Singh, Chaitnya Bapat, Ton Offermans, Frederik C. Krebs
Worldwide Outdoor Round Robin Study Of Organic Photovoltaic Devices And Modules, Morten V. Madsen, Suren A. Gevorgyan, R Pacios, J Ajuria, I Etxebarria, Jeff Kettle, Noel D. Bristow, Marios Neophytou, Stelios A. Choulis, Lucimara Stolz Roman, Teketel Yohannes, Andrea Cester, Pei Cheng, Xiaowei Zhan, Jiang Wu, Zhiyuan Xie, Wei-Chen Tu, Jr-Hau He, Christopher J Fell, Kenrick Anderson, Martin Hermenau, Davide Bartesaghi, L Jan Anton Koster, Florian Machui, Irene Gonzalez-Valls, Monica Lira-Cantu, Petr P. Khlyabich, Barry C. Thompson, Ritu Gupta, Kiruthika Shanmugam, Giridhar U. Kulkarni, Yulia Galagan, Antonio Urbina, Jose Abad, Roland Roesch, Harald Hoppe, P Morvillo, E Bobeico, Eugen Panaitescu, Latika Menon, Qun Luo, Zhenwu Wu, Changqii Ma, Artak Hambarian, Varuzhan Melikyan, M Hambsch, Paul L. Burn, Paul Meredith, Thomas Rath, Sebastian Dunst, Gregor Trimmel, Giorgio Bardizza, Harald Mullejans, A E. Goryachev, Ravi K. Misra, Eugene A. Katz, Katsuhiko Takagi, Shinichi Magaino, Hidenori Saito, Daisuke Aoki, Paul M. Sommeling, Jan M. Kroon, Tim Vangerven, Jean Manca, Jurgen Kesters, Wouter Maes, Olga D. Bobkova, Vasily A. Trukhanov, Dmitry Yu Paraschuk, Fernando A. Castro, James Blakesley, Sachetan M. Tuladhar, Jason Alexander Rohr, Jenny Nelson, Jiangbin Xia, Elif Alturk Parlak, Tulay Alsi Tumay, Hans-Joachim Egelhaaf, David M. Tanenbaum, Gretta Mae Ferguson, Robert Carpenter, Hongzheng Chen, Birger Zimmermann, Lionel Hirsch, Guillaume Wantz, Ziqi Sun, Pradeep Singh, Chaitnya Bapat, Ton Offermans, Frederik C. Krebs
Australian Institute for Innovative Materials - Papers
Accurate characterization and reporting of organic photovoltaic (OPV) device performance remains one of the important challenges in the field. The large spread among the efficiencies of devices with the same structure reported by different groups is significantly caused by different procedures and equipment used during testing. The presented article addresses this issue by offering a new method of device testing using "suitcase sample" approach combined with outdoor testing that limits the diversity of the equipment, and a strict measurement protocol. A round robin outdoor characterization of roll-to-roll coated OPV cells and modules conducted among 46 laboratories worldwide is presented, where …
Fabrication Of Free-Standing Hierarchical Carbon Nanofiber/Graphene Oxide/Polyaniline Films For Supercapacitors, Dongdong Xu, Qun Xu, Kaixi Wang, Jun Chen, Zhimin Chen
Fabrication Of Free-Standing Hierarchical Carbon Nanofiber/Graphene Oxide/Polyaniline Films For Supercapacitors, Dongdong Xu, Qun Xu, Kaixi Wang, Jun Chen, Zhimin Chen
Australian Institute for Innovative Materials - Papers
A hierarchical high-performance electrode with nanoacanthine-style polyaniline (PANI) deposited onto a carbon nanofiber/graphene oxide (CNF/GO) template was successfully prepared via an in situ polymerization process. The morphology analysis shows that introducing one-dimensional (1D) CNF could significantly decrease/inhibit the staking of laminated GO to form an open-porous CNF/GO architecture. Followed with in situ facial deposition of PANI, the as-synthesized PANI modified CNF/GO exhibits three-dimensional (3D) hierarchical layered nanoarchitecture, which favors the diffusion of the electrolyte ions into the inner region of active materials. The hierarchical free-standing electrodes were directly fabricated into sandwich structured supercapacitors using 1 M H2SO4 as the electrolyte …
Epitaxial Growth Mechanism Of Silicene On Ag(111), Xun Xu, Jincheng Zhuang, Yi Du, Stefan Eilers, Germanas Peleckis, Wai K. Yeoh, Xiaolin Wang, S X. Dou, Ke-Hui Wu
Epitaxial Growth Mechanism Of Silicene On Ag(111), Xun Xu, Jincheng Zhuang, Yi Du, Stefan Eilers, Germanas Peleckis, Wai K. Yeoh, Xiaolin Wang, S X. Dou, Ke-Hui Wu
Australian Institute for Innovative Materials - Papers
We report on the epitaxial growth mechanism of silicene layers fabricated on a Ag(111) surface by molecular beam epitaxial deposition. The coverage effect and the structural defects have been characterized using scanning tunneling microscopy (STM). It is found that substrate temperature plays an important role in the formation of silicene in different structures. Several kinds of defects are observed in different phases of silicene, which are most likely induced by the low coverage effect and the structural mismatch between the silicene and the Ag(111) surface. The Silicene sheet prefers to first emerge at the terrace edge of the substrate. Our …
A Robust Dna Interface On A Silicon Electrode, Pauline Michaels, Muhammad Tanzirul Alam, Simone Ciampi, William Rouesnel, Stephen G. Parker, Moinul H. Choudhury, J Justin Gooding
A Robust Dna Interface On A Silicon Electrode, Pauline Michaels, Muhammad Tanzirul Alam, Simone Ciampi, William Rouesnel, Stephen G. Parker, Moinul H. Choudhury, J Justin Gooding
Australian Institute for Innovative Materials - Papers
Two different interfaces prepared via UV-hydrosilylation of undecylenic acid and 1,8-nonadiyne on silicon(111) have been explored to develop a robust electrochemical DNA sensor. Electrodes modified with undecylenic acid were found to stably immobilise DNA but could not resist the growth of insulating oxides, whereas 1,8-nonadiyne modified electrodes satisfy both requirements.
Interaction Of The Mu-Cyclohexadienyl Radical With Metallic (Au, Pt) Nanoparticles In Mesoporous Silica, J Xiao, D J. Arseneau, M D. Bridges, David L. Cortie, S P. Cottrell, M H. Dehn, D G. Fleming, J A. Kelly, R F. Kiefl, W A. Macfarlane, M J. Maclachlan, I Mckenzie
Interaction Of The Mu-Cyclohexadienyl Radical With Metallic (Au, Pt) Nanoparticles In Mesoporous Silica, J Xiao, D J. Arseneau, M D. Bridges, David L. Cortie, S P. Cottrell, M H. Dehn, D G. Fleming, J A. Kelly, R F. Kiefl, W A. Macfarlane, M J. Maclachlan, I Mckenzie
Australian Institute for Innovative Materials - Papers
SR and ALCR techniques have been used to investigate the structure and dynamics of the Mu-cyclohexadienyl radical interacting with Au and Pt metal nanoparticles (MNPs) supported in mesoporous silica (SBA-15). Surprisingly, coherent precession signals are observed and the isotropic hyperne coupling constants are almost the same in loaded and unloaded samples, implying that the electronic structure of MuC6H6 is only weakly perturbed by the presence of the MNPs. We propose the observed radicals are shielded from the metallic surfaces by a benzene coating on the MNPs. The 1 resonance is observable in MNP-loaded samples at higher temperatures than in the …
Ultra-High Performance, High-Temperature Superconducting Wires Via Cost-Effective, Scalable, Co-Evaporation Process, Ho-Sup Kim, Sang-Soo Oh, Hong-Soo Ha, Dojun Youm, Seung-Hyun Moon, Jung Ho Kim, S X. Dou, Yoon-Uk Heo, Sung-Hun Wee, Amit Goyal
Ultra-High Performance, High-Temperature Superconducting Wires Via Cost-Effective, Scalable, Co-Evaporation Process, Ho-Sup Kim, Sang-Soo Oh, Hong-Soo Ha, Dojun Youm, Seung-Hyun Moon, Jung Ho Kim, S X. Dou, Yoon-Uk Heo, Sung-Hun Wee, Amit Goyal
Australian Institute for Innovative Materials - Papers
Long-length, high-temperature superconducting (HTS) wires capable of carrying high critical current, Ic, are required for a wide range of applications. Here, we report extremely high performance HTS wires based on 5 μm thick SmBa2Cu3O7 − δ (SmBCO) single layer films on textured metallic templates. SmBCO layer wires over 20 meters long were deposited by a cost-effective, scalable co-evaporation process using a batch-type drum in a dual chamber. All deposition parameters influencing the composition, phase, and texture of the films were optimized via a unique combinatorial method that is broadly applicable for co-evaporation of other promising complex materials containing several cations. …
Magnetic Transitions And The Magnetocaloric Effect In The Pr 1-Xyxmn2ge2 System, Jianli Wang, S J. Campbell, M F. Md Din, S J. Kennedy, M Hofmann
Magnetic Transitions And The Magnetocaloric Effect In The Pr 1-Xyxmn2ge2 System, Jianli Wang, S J. Campbell, M F. Md Din, S J. Kennedy, M Hofmann
Australian Institute for Innovative Materials - Papers
Layered rare earth compounds in the RMn2X2 series (R = rare-earth; X = Ge, Si) are of interest for potential cooling applications at lower temperatures as they enable the structural and magnetic behavior to be controlled via substitution of R, Mn, and X atoms on the 2a, 4d, and 4e sites respectively. We continue investigations of the Pr1−xYxMn2Ge2 magnetic phase diagram as functions of both composition and Mn-Mn spacing using X-ray and neutron diffraction, magnetization and differential scanning calorimetry measurements. Pr1−xYxMn2Ge2 exhibits an extended region of re-entrant ferromagnetism around x ∼ 0.5 with re-entrant ferromagnetism at inline image for Pr0.5Y0.5Mn2Ge2. …
The Role Of Emissive Charge Transfer States In Two Polymer-Fullerene Organic Photovoltaic Blends: Tuning Charge Photogeneration Through The Use Of Processing Additives, Tracey M. Clarke, Jeff Peet, Christoph Lungenschmied, Nicolas Drolet, Xinhui Lu, Benjamin M. Ocko, Attila Mozer, Maria Antonietta Loi
The Role Of Emissive Charge Transfer States In Two Polymer-Fullerene Organic Photovoltaic Blends: Tuning Charge Photogeneration Through The Use Of Processing Additives, Tracey M. Clarke, Jeff Peet, Christoph Lungenschmied, Nicolas Drolet, Xinhui Lu, Benjamin M. Ocko, Attila Mozer, Maria Antonietta Loi
Australian Institute for Innovative Materials - Papers
The role of charge transfer (CT) states in organic photovoltaic systems has been debated in the recent literature. In this paper the device performances of two structurally analogous polymers PDTSiTTz (also known as KP115) and PCPDTTTz blended with PCBM are investigated, focusing on the effect the processing additive diiodooctane (DIO) has on morphology, charge photogeneration, and, in particular, the CT state characteristics. While DIO has a considerable beneficial effect for PCPDTTTz:PCBM photovoltaic devices, negligible effects are observed for PDTSiTTz:PCBM devices. An emissive CT state able to be quenched by DIO was observed for PCPDTTTz:PCBM, despite relatively small morphological changes. This …
A Novel Magnetorheological Elastomer Isolator With Negative Changing Stiffness For Vibration Reduction, Jian Yang, Shuaishuai Sun, Haiping Du, Weihua Li, Gursel Alici, Huaxia Deng
A Novel Magnetorheological Elastomer Isolator With Negative Changing Stiffness For Vibration Reduction, Jian Yang, Shuaishuai Sun, Haiping Du, Weihua Li, Gursel Alici, Huaxia Deng
Australian Institute for Innovative Materials - Papers
Magneto-rheological elastomers (MREs) have attracted notable credits in the development of smart isolators and absorbers due to their controllable stiffness and damping properties. For the purpose of mitigating unwanted structural and/or machinery vibrations, the traditional MRE-based isolators have been generally proven effective because the MR effect can increase the stiffness when the magnetic field is strengthened. This study presents a novel MRE isolator that experienced reduced stiffness when the applied current was increased. This innovative work was accomplished by applying a hybrid magnet (electromagnet and permanent magnets) onto a multilayered MRE structure. To characterise this negative changing stiffness concept, a …
Enhanced Performance Of Dye-Sensitized Solar Cells Using Carbazole-Substituted Di-Chromophoric Porphyrin Dyes, Long Zhao, Pawel Wagner, Anastasia Elliott, Matthew Griffith, Tracey M. Clarke, Keith C. Gordon, Shogo Mori, Attila Mozer
Enhanced Performance Of Dye-Sensitized Solar Cells Using Carbazole-Substituted Di-Chromophoric Porphyrin Dyes, Long Zhao, Pawel Wagner, Anastasia Elliott, Matthew Griffith, Tracey M. Clarke, Keith C. Gordon, Shogo Mori, Attila Mozer
Australian Institute for Innovative Materials - Papers
The purpose of this work is to investigate the origin of improved photovoltaic performance of a series of di-chromophoric carbazole-substituted porphyrin dyes employed as sensitizers in dye-sensitized solar cells. Five di-chromophoric zinc porphyrin dyes with the same porphyrin core, a carbazole unit attached in the meso-position through a phenylethenyl linkage, and substituents spanning a range of electron affinities, in an attempt to tune the electronic level of the carbazole unit, have been synthesized (CZPs). Density functional theory (DFT) calculations predicted the nature of the electronic transitions observed in the CZP systems, showing a large degree of orbital mixing. In contrast, …
Modeling Transport Properties Of Inhomogeneous Superconductor-Metal Composites, A Borroto, L Del Rio, M Arronte, Tom Johansen, E Altshuler
Modeling Transport Properties Of Inhomogeneous Superconductor-Metal Composites, A Borroto, L Del Rio, M Arronte, Tom Johansen, E Altshuler
Australian Institute for Innovative Materials - Papers
We propose a model for a superconductor-metal composite that allows to derive intrinsic transport properties of the superconducting phase based on 2D images of its cross section, and a minimal set of parameters. The method is tested experimentally by using, as model composite, a "transversal bridge" made on a Bi2Sr2Ca2Cu3O10+x (BSCCO)-Ag multi-filamentary tape. It is shown that the approach allows to predict the measured I−⟨E⟩ curves of the filaments. In addition, one can determine the critical current anisotropy between the longitudinal and transverse directions of the Ag-BSCCO tape, and also of …
8li+ B-Nmr In The Cubic Insulator Mgo, W A. Macfarlane, T J. Parolin, David L. Cortie, K H. Chow, M D. Hossain, R F. Kiefl, C D. P Levy, R M. L Mcfadden, G D. Morris, M R. Pearson, H Saadaoui, Z Salman, Q Song, D Wang
8li+ B-Nmr In The Cubic Insulator Mgo, W A. Macfarlane, T J. Parolin, David L. Cortie, K H. Chow, M D. Hossain, R F. Kiefl, C D. P Levy, R M. L Mcfadden, G D. Morris, M R. Pearson, H Saadaoui, Z Salman, Q Song, D Wang
Australian Institute for Innovative Materials - Papers
We present extensive high magnetic field B-NMR measurements of 8Li+ implanted in single crystals of MgO. The narrow resonance, consistent with a cubic 8Li+ site, likely the tetrahedral interstitital, is used routinely as a reference for shift measurements. We show the intrinsic line width is on the order of 200 Hz, allowing a frequency determination to an accuracy of a few Hz. We find no implantation energy dependence of the resonance within a few ppm, but there is evidence of slow spin dynamics in hole-burning measurements. The spin lattice relaxation is slow. The temperature dependence reveals interesting changes at low …
Element-Specific Depth Profile Of Magnetism And Stoichiometry At The La0.67sr0.33mno3/Bifeo3 Interface, Joel Bertinshaw, S Bruck, D Lott, H Fritzsche, Y Khaydukov, O Soltwedel, T Keller, E Goering, P Audehm, David L. Cortie, Wayne D. Hutchison, Q Ramasse, M Arredondo, R Maran, Vinayaka Nagarajan, Frank Klose, Clemens Ulrich
Element-Specific Depth Profile Of Magnetism And Stoichiometry At The La0.67sr0.33mno3/Bifeo3 Interface, Joel Bertinshaw, S Bruck, D Lott, H Fritzsche, Y Khaydukov, O Soltwedel, T Keller, E Goering, P Audehm, David L. Cortie, Wayne D. Hutchison, Q Ramasse, M Arredondo, R Maran, Vinayaka Nagarajan, Frank Klose, Clemens Ulrich
Australian Institute for Innovative Materials - Papers
Depth-sensitive magnetic, structural, and chemical characterization is important in the understanding and optimization of physical phenomena emerging at the interfaces of transition metal oxide heterostructures. In a simultaneous approach we have used polarized neutron and resonant x-ray reflectometry to determine the magnetic profile across atomically sharp interfaces of ferromagnetic La0.67Sr0.33MnO3/multiferroic BiFeO3 bilayers with subnanometer resolution. In particular, the x-ray resonant magnetic reflectivity measurements at the Fe and Mn resonance edges allowed us to determine the element-specific depth profile of the ferromagnetic moments in both the La0.67Sr0.33MnO3 and BiFeO3 layers. Our measurements indicate a magnetically diluted interface layer within the La0.67Sr0.33MnO3 …
Interface Charge Doping Effects On Superconductivity Of Single-Unit-Cell Fese Films On Srtio3 Substrates, Wenhao Zhang, Zhi Li, Fangsen Li, Huimin Zhang, Jun-Ping Peng, Chenjia Tang, Qingyan Wang, Ke He, Xi Chen, Lili Wang, Xu-Cun Ma, Qi-Kun Xue
Interface Charge Doping Effects On Superconductivity Of Single-Unit-Cell Fese Films On Srtio3 Substrates, Wenhao Zhang, Zhi Li, Fangsen Li, Huimin Zhang, Jun-Ping Peng, Chenjia Tang, Qingyan Wang, Ke He, Xi Chen, Lili Wang, Xu-Cun Ma, Qi-Kun Xue
Australian Institute for Innovative Materials - Papers
We prepare single-unit-cell FeSe films on insulating SrTiO3 substrates by molecular beam epitaxy and investigate the evolution of their superconducting properties with annealing by in situ scanning tunneling microscopy and scanning tunneling spectroscopy and ex situ transport measurements. We find that through an annealing process, the superconductivity of 1-uc FeSe films on SrTiO3 substrates develops with the formation of stoichiometric FeSe films and is further enhanced by charge transfer from SrTiO3 substrates to FeSe films. Moreover, the superconductivity is independent of the bulk property of the SrTiO3 substrate, regardless of whether it is insulating or conductive. Our results reveal that …
Imaging The Electron-Boson Coupling In Superconducting Fese Films Using A Scanning Tunneling Microscope, Canli Song, Yi-Lin Wang, Yeping Jiang, Zhi Li, Lili Wang, Ke He, Xi Chen, Jennifer E. Hoffman, Xu-Cun Ma, Qi-Kun Xue
Imaging The Electron-Boson Coupling In Superconducting Fese Films Using A Scanning Tunneling Microscope, Canli Song, Yi-Lin Wang, Yeping Jiang, Zhi Li, Lili Wang, Ke He, Xi Chen, Jennifer E. Hoffman, Xu-Cun Ma, Qi-Kun Xue
Australian Institute for Innovative Materials - Papers
Scanning tunneling spectroscopy has been used to reveal signatures of a bosonic mode in the local quasiparticle density of states of superconducting FeSe films. The mode appears below Tc as a "dip-hump" feature at energy Ω ∼ 4.7kBTc beyond the superconducting gap Δ. Spectra on strained regions of the FeSe films reveal simultaneous decreases in Δ and Ω. This contrasts with all previous reports on other high-Tc superconductors, where Δ locally anticorrelates with Ω. A local strong coupling model is found to reconcile the discrepancy well, and to provide a unified picture of the electron-boson coupling in unconventional superconductors.
Magnetic Transitions In Lafe13-X-Ycoysix Compounds, Jianli Wang, S J. Campbell, S J. Kennedy, P Shamba, R Zeng, S X. Dou, G H. Wu
Magnetic Transitions In Lafe13-X-Ycoysix Compounds, Jianli Wang, S J. Campbell, S J. Kennedy, P Shamba, R Zeng, S X. Dou, G H. Wu
Australian Institute for Innovative Materials - Papers
The magnetic properties of a set of LaFe13−x−yCoySix compounds (x = 1.6 − 2.6; y = 0, y = 1.0) have been investigated using magnetic measurements, thermal expansion, 57Fe Mössbauer spectroscopy and high resolution neutron powder diffraction methods over the temperature range 10–300 K. The natures of the magnetic transitions in these LaFe13−x−yCoySix compounds have been determined. The Curie temperatures of LaFe13−xSix were found to increase with Si content from TC = 219(5) K for Si content x = 1.6 to TC = 250(5) K for x = 2.6. Substitution of Co for Fe in LaFe10.4Si2.6 resulted in a further …
Significant Tunability Of Thin Film Functionalities Enabled By Manipulating Magnetic And Structural Nano-Domains, Igor A. Golovchanskiy, Alexey V. Pan, Sergey A. Fedoseev, Michael Higgins
Significant Tunability Of Thin Film Functionalities Enabled By Manipulating Magnetic And Structural Nano-Domains, Igor A. Golovchanskiy, Alexey V. Pan, Sergey A. Fedoseev, Michael Higgins
Australian Institute for Innovative Materials - Papers
The influence of laser frequency on the structure and physical properties of thin films grown by pulsed laser deposition has been studied. Different types of thin films, hard ferromagnetic FePt L10 and quasi-single crystal superconducting YBa2Cu3O7 (YBCO), have been used for demonstration of the effect. Significant structural modifications have been obtained for the films with similar thicknesses. These modifications are shown to dramatically control their corresponding properties, providing an instrumental ability for tuning the practical characteristics of the films by changing the laser frequency of their deposition. In particular, 20-fold increase of coercive field and modification of demagnetization mechanism are …
Graphene Can Pave The Way For Australian Manufacturing, David L. Officer, Gordon G. Wallace
Graphene Can Pave The Way For Australian Manufacturing, David L. Officer, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Australian industries have reached a turning point. With old industries on the way out, the Australian manufacturing sector's biggest challenge is to move from a low-cost mass production model to one that exploits niche markets and adds value to the global supply chain. Research-driven technological advances are an essential part of that process. By building upon the country's natural advantages, such as mineral and energy resources, this kind of progress can foster exciting, sustainable industries. The perfect example is graphene.
Rapid Synthesis Of Li4ti5o12/Graphene Composite With Superior Rate Capability By A Microwave-Assisted Hydrothermal Method, Yi Shi, Jie Gao, Hector D. Abruna, Hua-Kun Liu, Huijun Li, Jiazhao Wang, Yuping Wu
Rapid Synthesis Of Li4ti5o12/Graphene Composite With Superior Rate Capability By A Microwave-Assisted Hydrothermal Method, Yi Shi, Jie Gao, Hector D. Abruna, Hua-Kun Liu, Huijun Li, Jiazhao Wang, Yuping Wu
Australian Institute for Innovative Materials - Papers
Li4Ti5O12 microspheres composed of nanoflakes wrapped in graphene nanosheets have been synthesized by an advanced microwave-hydrothermal (MW-HT) method for the preparation following by an annealing step. Microwave-assisted synthesis processes are appealing, as they can rapidly synthesize materials with a high degree of control of particle size and morphology at low cost. The resultant composite reveals a unique loose structure which could avoid the restacking of graphene sheets and offer rapid lithium ion diffusion paths. Therefore the Li4Ti5O12/graphene electrode has highly desirable properties: a specific capacity approaching the theoretical value, stable cycling, and exceptional rate capability. The composite also can be …