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Articles 571 - 600 of 4868

Full-Text Articles in Physical Sciences and Mathematics

Enhanced Physicochemical Properties Of Polydimethylsiloxane Based Microfluidic Devices And Thin Films By Incorporating Synthetic Micro-Diamond, Sidra Waheed, Joan M. Cabot, Niall Macdonald, Umme Kalsoom, Syamak Farajikhah, Peter C. Innis, Pavel N. Nesterenko, Trevor W. Lewis, Michael C. Breadmore, Brett Paull Jan 2017

Enhanced Physicochemical Properties Of Polydimethylsiloxane Based Microfluidic Devices And Thin Films By Incorporating Synthetic Micro-Diamond, Sidra Waheed, Joan M. Cabot, Niall Macdonald, Umme Kalsoom, Syamak Farajikhah, Peter C. Innis, Pavel N. Nesterenko, Trevor W. Lewis, Michael C. Breadmore, Brett Paull

Australian Institute for Innovative Materials - Papers

Synthetic micro-diamond-polydimethylsiloxane (PDMS) composite microfluidic chips and thin films were produced using indirect 3D printing and spin coating fabrication techniques. Microfluidic chips containing up to 60 wt% micro-diamond were successfully cast and bonded. Physicochemical properties, including the dispersion pattern, hydrophobicity, chemical structure, elasticity and thermal characteristics of both chip and films were investigated. Scanning electron microscopy indicated that the micro-diamond particles were embedded and interconnected within the bulk material of the cast microfluidic chip, whereas in the case of thin films their increased presence at the polymer surface resulted in a reduced hydrophobicity of the composite. The elastic modulus increased …

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Rare Earth-Based Quaternary Heusler Compounds Mcovz (M = Lu, Y; Z = Si, Ge) With Tunable Band Characteristics For Potential Spintronic Applications, Xiaotian Wang, Zhenxiang Cheng, Guodong Liu, Xuefang Dai, Rabah Khenata, Liying Wang, Abdelmadjid Bouhemadou Jan 2017

Rare Earth-Based Quaternary Heusler Compounds Mcovz (M = Lu, Y; Z = Si, Ge) With Tunable Band Characteristics For Potential Spintronic Applications, Xiaotian Wang, Zhenxiang Cheng, Guodong Liu, Xuefang Dai, Rabah Khenata, Liying Wang, Abdelmadjid Bouhemadou

Australian Institute for Innovative Materials - Papers

Magnetic Heusler compounds (MHCs) have recently attracted great attention since these types of material provide novel functionalities in spintronic and magneto-electronic devices. Among the MHCs, some compounds have been predicted to be spin-filter semiconductors [also called magnetic semiconductors (MSs)], spin-gapless semiconductors (SGSs) or half-metals (HMs). In this work, by means of first-principles calculations, it is demonstrated that rare earth-based equiatomic quaternary Heusler (EQH) compounds with the formula MCoVZ (M = Lu, Y; Z = Si, Ge) are new spin-filter semiconductors with total magnetic moments of 3 mB. Furthermore, under uniform strain, there are physical transitions from spin-filter semiconductor (MS) ! …

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Improvement Of Thermoelectric Properties And Their Correlations With Electron Effective Mass In Cu1.98sxse1−X, Lanling Zhao, Frank Yun Fei, Jun Wang, Funing Wang, Chunlei Wang, Jichao Li, Ji-Yang Wang, Zhenxiang Cheng, Shi Xue Dou, Xiaolin Wang Jan 2017

Improvement Of Thermoelectric Properties And Their Correlations With Electron Effective Mass In Cu1.98sxse1−X, Lanling Zhao, Frank Yun Fei, Jun Wang, Funing Wang, Chunlei Wang, Jichao Li, Ji-Yang Wang, Zhenxiang Cheng, Shi Xue Dou, Xiaolin Wang

Australian Institute for Innovative Materials - Papers

Sulphur doping effects on the crystal structures, thermoelectric properties, density-of-states, and effective mass in Cu1.98SxSe1−x were studied based on the electrical and thermal transport property measurements, and first-principles calculations. The X-ray diffraction patterns and Rietveld refinements indicate that room temperature Cu1.98SxSe1−x (x=0, 0.02, 0.08, 0.16) and Cu1.98SxSe1−x (x=0.8, 0.9, 1.0) have the same crystal structure as monoclinic-Cu2Se and orthorhombic-Cu2S, respectively. Sulphur doping can greatly enhance zT values when x is in the range of 0.8≤x≤1.0. Furthermore, all doped samples show stable thermoelectric compatibility factors over a broad temperature range from 700 to 1000K, which could greatly benefit their practical applications. …

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Design And Engineering Of Water-Soluble Light-Harvesting Protein Maquettes, Goutham Kodali, Joshua A. Mancini, Lee A. Solomon, Tatiana V. Episova, Nicholas Roach, Christopher Hobbs, Pawel W. Wagner, Olga Mass, Kunche Aravindu, Jonathan E. Barnsley, Keith C. Gordon, David L. Officer, P. Leslie Dutton, Christopher C. Moser Jan 2017

Design And Engineering Of Water-Soluble Light-Harvesting Protein Maquettes, Goutham Kodali, Joshua A. Mancini, Lee A. Solomon, Tatiana V. Episova, Nicholas Roach, Christopher Hobbs, Pawel W. Wagner, Olga Mass, Kunche Aravindu, Jonathan E. Barnsley, Keith C. Gordon, David L. Officer, P. Leslie Dutton, Christopher C. Moser

Australian Institute for Innovative Materials - Papers

Natural selection in photosynthesis has engineered tetrapyrrole based, nanometer scale, light harvesting and energy capture in light-induced charge separation. By designing and creating nanometer scale artificial light harvesting and charge separating proteins, we have the opportunity to reengineer and overcome the limitations of natural selection to extend energy capture to new wavelengths and to tailor efficient systems that better meet human as opposed to cellular energetic needs. While tetrapyrrole cofactor incorporation in natural proteins is complex and often assisted by accessory proteins for cofactor transport and insertion, artificial protein functionalization relies on a practical understanding of the basic physical chemistry …

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Enhanced Rate-Capability And Cycling-Stability Of 5 V Sio2- And Polyimide-Coated Cation Ordered Lini0.5mn1.5o4 Lithium-Ion Battery Positive Electrodes, Wei Kong Pang, Hsiu-Fen Lin, Vanessa K. Peterson, Cheng-Zhang Lu, Chia-Erh Liu, Shih-Chieh Liao, Jin-Ming Chen Jan 2017

Enhanced Rate-Capability And Cycling-Stability Of 5 V Sio2- And Polyimide-Coated Cation Ordered Lini0.5mn1.5o4 Lithium-Ion Battery Positive Electrodes, Wei Kong Pang, Hsiu-Fen Lin, Vanessa K. Peterson, Cheng-Zhang Lu, Chia-Erh Liu, Shih-Chieh Liao, Jin-Ming Chen

Australian Institute for Innovative Materials - Papers

The ordered LiNi0.5Mn1.5O4 spinel exhibits great promise as a potential high-energy positive electrode for lithium-ion batteries due to its exceptionally high working potential of 4.7 V (vs. Li) and energy density of 640 Wh kg-1. The commercial application of this material at such voltages is unfortunately prevented by reaction phenomena including hydrofluoric acid attack and manganese dissolution, as well as the two-phase mechanism of Li insertion and extraction, with these limiting Li diffusivity and cycling stability. In this work, we demonstrate the improved performance of LiNi0.5Mn1.5O4 achieved by encapsulating the material in a thin layer of silica (SiO2) or polyimide …

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Electrochemical Biosensing Strategies For Dna Methylation Analysis, Tanvir Hossain, Golam Mahmudunnabi, Mostafa Masud, Md Nazmul Islam, Lezanne Ooi, Konstantin K. Konstantinov, Md Shahriar Hossain, Boris Martinac, Gursel Alici, Nam-Trung Nguyen, Muhammad Shiddiky Jan 2017

Electrochemical Biosensing Strategies For Dna Methylation Analysis, Tanvir Hossain, Golam Mahmudunnabi, Mostafa Masud, Md Nazmul Islam, Lezanne Ooi, Konstantin K. Konstantinov, Md Shahriar Hossain, Boris Martinac, Gursel Alici, Nam-Trung Nguyen, Muhammad Shiddiky

Australian Institute for Innovative Materials - Papers

DNA methylation is one of the key epigenetic modifications of DNA that results from the enzymatic addition of a methyl group at the fifth carbon of the cytosine base. It plays a crucial role in cellular development, genomic stability and gene expression. Aberrant DNA methylation is responsible for the pathogenesis of many diseases including cancers. Over the past several decades, many methodologies have been developed to detect DNA methylation. These methodologies range from classical molecular biology and optical approaches, such as bisulfite sequencing, microarrays, quantitative real-time PCR, colorimetry, Raman spectroscopy to the more recent electrochemical approaches. Among these, electrochemical approaches …

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Large-Scale Synthesis Of Ternary Sn5sbp3/C Composite By Ball Milling For Superior Stable Sodium-Ion Battery Anode, Wenchao Zhang, Jianfeng Mao, Wei Kong Pang, Zaiping Guo, Zhixin Chen Jan 2017

Large-Scale Synthesis Of Ternary Sn5sbp3/C Composite By Ball Milling For Superior Stable Sodium-Ion Battery Anode, Wenchao Zhang, Jianfeng Mao, Wei Kong Pang, Zaiping Guo, Zhixin Chen

Australian Institute for Innovative Materials - Papers

Alloy-based materials (i.e. Sn, Sb, P) are promising candidates for sodium-ion battery (SIB) anodes, but they suffer from capacity decay during charge/discharge cycling due to the pulverization caused by their huge volume change. Nanostructures can slow down the capacity fade, but most of the synthesis methods of such nanostructured anodes are difficult to scale-up. Herein, a ternary Sn5SbP3/C composite was fabricated by a green, low cost, one-step and easily scalable ball-milling of elementary Sn, Sb, P, and C. The microstructure of the ball-milled powders consists of micrometric agglomerates of active nano Sn4P3 and SnSb and Sn particles. Carbon in the …

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Demetallatation Of Electrochemically Polymerised Mn Porphyrin Anion / Pedot Composites Under Light-Illumination, Danijel Boskovic, Sivakumar Balakrishnan, Pawel W. Wagner, Gerhard F. Swiegers Jan 2017

Demetallatation Of Electrochemically Polymerised Mn Porphyrin Anion / Pedot Composites Under Light-Illumination, Danijel Boskovic, Sivakumar Balakrishnan, Pawel W. Wagner, Gerhard F. Swiegers

Australian Institute for Innovative Materials - Papers

This work reports photo-demetallation studies of thin-layer, electropolymerized poly(3,4-ethylenedioxythiophene) (PEDOT) loaded with low levels of: (i) an anionic Mn porphyrin monomer (5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrinato manganese(III) chloride (MnTPPS)), and (ii) an anionic Mn porphyrin polymer (poly(5-(4-vinylphenyl)-10,15,20-tris(4-sulfonatophenyl)) porphyrinato manganese(III) chloride (MnPVTPPS)). UV-vis and other measurements confirm that, like previously-studied cationic Mn(III) porphyrins embedded within vapour-phase polymerized PEDOT in low loadings, de-metallation under light illumination also occurs in these systems. However, it occurs to a significantly lesser degree. It can be concluded that demetallation appears to be an inherent feature of PEDOT coatings containing low levels of Mn porphyrins when they are illuminated with light. …

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Nitrogen-Doped Nanoporous Carbon Membranes With Co/Cop Janus-Type Nanocrystals As Hydrogen Evolution Electrode In Both Acidic And Alkaline Environments, Hong Wang, Shixiong Min, Qiang Wang, Debao Li, Gilberto Casillas, Chun Ma, Yangyang Li, Zhixiong Liu, Lain Li, Jiayin Yuan, Markus Antonietti, Tom Wu Jan 2017

Nitrogen-Doped Nanoporous Carbon Membranes With Co/Cop Janus-Type Nanocrystals As Hydrogen Evolution Electrode In Both Acidic And Alkaline Environments, Hong Wang, Shixiong Min, Qiang Wang, Debao Li, Gilberto Casillas, Chun Ma, Yangyang Li, Zhixiong Liu, Lain Li, Jiayin Yuan, Markus Antonietti, Tom Wu

Australian Institute for Innovative Materials - Papers

Self-supported electrocatalysts being generated and employed directly as electrodes for energy conversion has been intensively pursued in the fields of materials chemistry and energy. Herein, we report a synthetic strategy to prepare freestanding hierarchically structured, nitrogen-doped nanoporous graphitic carbon membranes functionalized with Janus-type Co/CoP nanocrystals (termed as HNDCM-Co/CoP), which were successfully applied as a highly efficient, binder-free electrode in the hydrogen evolution reaction (HER). Benefited from multiple structural merits, such as a high degree of graphitization, three-dimensionally interconnected micro/meso/macropores, uniform nitrogen doping, well-dispersed Co/CoP nanocrystals, as well as the confinement effect of the thin carbon layer on the nanocrystals, HNDCM-Co/CoP …

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Atomic Interface Engineering And Electric-Field Effect In Ultrathin Bi2moo6 Nanosheets For Superior Lithium Ion Storage, Yang Zheng, Tengfei Zhou, Xudong Zhao, Wei Kong Pang, Hong Gao, Sean Li, Zhen Zhou, Hua-Kun Liu, Zaiping Guo Jan 2017

Atomic Interface Engineering And Electric-Field Effect In Ultrathin Bi2moo6 Nanosheets For Superior Lithium Ion Storage, Yang Zheng, Tengfei Zhou, Xudong Zhao, Wei Kong Pang, Hong Gao, Sean Li, Zhen Zhou, Hua-Kun Liu, Zaiping Guo

Australian Institute for Innovative Materials - Papers

Ultrathin 2D materials can offer promising opportunities for exploring advanced energy storage systems, with satisfactory electrochemical performance. Engineering atomic interfaces by stacking 2D crystals holds huge potential for tuning material properties at the atomic level, owing to the strong layer-layer interactions, enabling unprecedented physical properties. In this work, atomically thin Bi2MoO6 sheets are acquired that exhibit remarkable high-rate cycling performance in Li-ion batteries, which can be ascribed to the interlayer coupling effect, as well as the 2D configuration and intrinsic structural stability. The unbalanced charge distribution occurs within the crystal and induces built-in electric fields, significantly boosting lithium ion transfer …

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A Biodegradable Thin-Film Magnesium Primary Battery Using Silk Fibroin-Ionic Liquid Polymer Electrolyte, Xiaoteng Jia, Caiyun Wang, Vijayaraghavan Ranganathan, Bradley Napier, Changchun Yu, Yunfeng Chao, Maria Forsyth, Fiorenzo Omenetto, Douglas R. Macfarlane, Gordon G. Wallace Jan 2017

A Biodegradable Thin-Film Magnesium Primary Battery Using Silk Fibroin-Ionic Liquid Polymer Electrolyte, Xiaoteng Jia, Caiyun Wang, Vijayaraghavan Ranganathan, Bradley Napier, Changchun Yu, Yunfeng Chao, Maria Forsyth, Fiorenzo Omenetto, Douglas R. Macfarlane, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

Transient implantable medical bionics offer great promise in the field of smart controlled release and tissue regeneration. On-board energy storage is the ideal power system to drive them. In this work, a critical component of such a device, a biodegradable polymer electrolyte (silk fibroin-choline nitrate) has been developed. The efficiency of this electrolyte is demonstrated when deployed in a biodegradable thin-film magnesium battery. The battery, encapsulated in silk, offers a specific capacity of 0.06 mAh cm-2. The enzymatic degradation of the whole device occurs over 45 days in the buffered protease XIV solution. A programmed battery lifetime can be achieved …

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Mesoporous Metallic Rhodium Nanoparticles, Bo Jiang, Cuiling Li, Omer Dag, Hideki Abe, Toshiaki Takei, Tsubasa Imai, Md Shahriar Hossain, Md Tofazzal Islam, Kathleen Wood, Joel Henzie, Yusuke Yamauchi Jan 2017

Mesoporous Metallic Rhodium Nanoparticles, Bo Jiang, Cuiling Li, Omer Dag, Hideki Abe, Toshiaki Takei, Tsubasa Imai, Md Shahriar Hossain, Md Tofazzal Islam, Kathleen Wood, Joel Henzie, Yusuke Yamauchi

Australian Institute for Innovative Materials - Papers

Mesoporous noble metals are an emerging class of cutting-edge nanostructured catalysts due to their abundant exposed active sites and highly accessible surfaces. Although various noble metal (e.g. Pt, Pd and Au) structures have been synthesized by hard- and soft-- templating methods, mesoporous rhodium (Rh) nanoparticles have never been generated via chemical reduction, in part due to the relatively high surface energy of rhodium (Rh) metal. Here we describe a simple, scalable route to generate mesoporous Rh by chemical reduction on polymeric micelle templates [poly(ethylene oxide)-b-poly(methyl methacrylate) (PEO-b-PMMA)]. The mesoporous Rh nanoparticles exhibited a B2.6 times enhancement for the electrocatalytic oxidation …

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A New Energy Storage System: Rechargeable Potassium-Selenium Battery, Yajie Liu, Zhixin Tai, Qing Zhang, Hongqiang Wang, Wei Kong Pang, Hua-Kun Liu, Konstantin K. Konstantinov, Zaiping Guo Jan 2017

A New Energy Storage System: Rechargeable Potassium-Selenium Battery, Yajie Liu, Zhixin Tai, Qing Zhang, Hongqiang Wang, Wei Kong Pang, Hua-Kun Liu, Konstantin K. Konstantinov, Zaiping Guo

Australian Institute for Innovative Materials - Papers

A new reversible and high-performance potassium-selenium (K-Se) battery, using confined selenium/carbonized-polyacrylonitrile (PAN) composite (c-PAN-Se) as cathode and metallic potassium as anode, is reported in this work. The PAN-derived carbon matrix could effectively confine the small Se molecules and provide a sufficient buffer for the volume changes. The reversible formation of small-molecule trigonal Se (Se1, P3121) phase could essentially inhibit the formation of polyselenides and account for outstanding electrochemical performance. The carbonate-based electrolyte further synergistically diminishes the shuttle effect by inhibiting the formation of polyselenides in the meantime. The as-prepared K-Se battery shows a reversible capacity of 1904 mAh cm¿3after 100 …

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Rna Biomarkers: Diagnostic And Prognostic Potentials And Recent Developments Of Electrochemical Biosensors, Md Nazmul Islam, Mostafa Kamal Masud, Md Hakimul Haque, Md. Shahriar Al Hossain, Yusuke Yamauchi, Nam-Trung Nguyen, Muhammad J. A Shiddiky Jan 2017

Rna Biomarkers: Diagnostic And Prognostic Potentials And Recent Developments Of Electrochemical Biosensors, Md Nazmul Islam, Mostafa Kamal Masud, Md Hakimul Haque, Md. Shahriar Al Hossain, Yusuke Yamauchi, Nam-Trung Nguyen, Muhammad J. A Shiddiky

Australian Institute for Innovative Materials - Papers

Ribonucleic acids (RNAs) are considered as effective and minimally invasive biomarkers for disease diagnosis and prognosis due to their critical role in the regulation of different cellular processes. Over the past several years, the rapid progress in RNA biomarker research has resulted in the development of a large number of high-performance RNA-detection methods. Most of these methods are based on molecular-biology techniques such as quantita-tive reverse transcription polymerase chain reaction (RT-qPCR), microarrays, and RNA sequencing. In recent years, considerable attention has also been dedicated to developing RNA biosensors, exploiting micro- and nanofabrica-tion technologies, and various readout strategies, including electrochemical and …

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First-Principles Study Of Decomposition Mechanisms Of Mg(Bh4)2$2nh3 And Limg(Bh4)3$2nh3, Xiaowei Chen, Renquan Li, Guanglin Xia, Hongsheng He, Xiuqing Zhang, Weidong Zou, Xubin Yu Jan 2017

First-Principles Study Of Decomposition Mechanisms Of Mg(Bh4)2$2nh3 And Limg(Bh4)3$2nh3, Xiaowei Chen, Renquan Li, Guanglin Xia, Hongsheng He, Xiuqing Zhang, Weidong Zou, Xubin Yu

Australian Institute for Innovative Materials - Papers

The decomposition mechanisms of Mg(BH 4 ) 2 ·2NH 3 and LiMg(BH 4 ) 3 ·2NH 3 were studied by using density functional theory calculations. Compared to that of Mg(BH 4 ) 2 ·2NH 3 , the incorporation of LiBH 4 with the formation of LiMg(BH 4 ) 3 ·2NH 3 slightly increased Bader charges of B atoms, meanwhile it decreased Bader charges of N atoms. Mg(BH 4 ) 2 ·2NH 3 shows a low ammonia vacancy diffusion barrier, but relatively high ammonia vacancy formation energy, which lead to a low concentration of NH 3 vacancies and limit NH 3 …

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Efficient Visible-Light Photocatalysts By Constructing Dispersive Energy Band With Anisotropic P And S-P Hybridization States, Haifeng Feng, Yi Du, Cong Wang, Weichang Hao Jan 2017

Efficient Visible-Light Photocatalysts By Constructing Dispersive Energy Band With Anisotropic P And S-P Hybridization States, Haifeng Feng, Yi Du, Cong Wang, Weichang Hao

Australian Institute for Innovative Materials - Papers

Highly efficient visible-light photocatalysts are strongly in demand because they make it possible to achieve higher efficiency in utilization of solar energy, w hich is renewable and abundant. A narrow band gap, effective separation of photoexcited charge carriers, and proper band-edge positions, which depend on the band structure of the photocatalyst, are crucial for solar-energy conversion efficiency. In this review, we have summarized reports on the strategy of exploiting highly efficient visible-light photocatalysts by constructing their band structure with anisotropic p and s-p hybridization states. Taking advantage of their dispersive and easily tunable band properties, enhanced efficiency in solar light …

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Room-Temperature Sodium-Sulfur Batteries: A Comprehensive Review On Research Progress And Cell Chemistry, Yunxiao Wang, Binwei Zhang, Weihong Lai, Yanfei Xu, Shulei Chou, Hua-Kun Liu, Shi Xue Dou Jan 2017

Room-Temperature Sodium-Sulfur Batteries: A Comprehensive Review On Research Progress And Cell Chemistry, Yunxiao Wang, Binwei Zhang, Weihong Lai, Yanfei Xu, Shulei Chou, Hua-Kun Liu, Shi Xue Dou

Australian Institute for Innovative Materials - Papers

Room temperature sodium-sulfur (RT-Na/S) batteries have recently regained a great deal of attention due to their high theoretical energy density and low cost, which make them promising candidates for application in large-scale energy storage, especially in stationary energy storage, such as with electrical grids. Research on this system is currently in its infancy, and it is encountering severe challenges in terms of low electroactivity, limited cycle life, and serious self-charging. Moreover, the reaction mechanism of S with Na ions varies with the electrolyte that is applied, and is very complicated and hard to detect due to the multi-step reactions and …

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Activated Carbon From The Graphite With Increased Rate Capability For The Potassium Ion Battery, Zhixin Tai, Qing Zhang, Yajie Liu, Hua-Kun Liu, Shi Xue Dou Jan 2017

Activated Carbon From The Graphite With Increased Rate Capability For The Potassium Ion Battery, Zhixin Tai, Qing Zhang, Yajie Liu, Hua-Kun Liu, Shi Xue Dou

Australian Institute for Innovative Materials - Papers

Activated carbon has been synthesized by a high-temperature annealing route using graphite as carbon source and potassium hydroxide as the etching agent. Many nanosized carbon sheets formed on the particles could be of benefit for rapid intercalation/de-intercalation of potassium ions. Moreover, the d-spacing in the (100) crystal planes of the as-prepared active carbon is enlarged to 0.335 nm, even some formed carbon nanosheets can reach 0.358 nm, and the diffusion coefficient of K ion is also improved by 7 times as well. The as-prepared activated carbon electrode can deliver a high reversible capacity of 100 mAh g ¿1 after 100 …

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Tuning The Magnetic And Structural Transitions In Tbco2mnx Compounds, Chunsheng Fang, Jian Li Wang, Fang Hong, Wayne D. Hutchison, M. F Md Din, Andrew J. Studer, Justin A. Kimpton, Shi Xue Dou, Zhenxiang Cheng Jan 2017

Tuning The Magnetic And Structural Transitions In Tbco2mnx Compounds, Chunsheng Fang, Jian Li Wang, Fang Hong, Wayne D. Hutchison, M. F Md Din, Andrew J. Studer, Justin A. Kimpton, Shi Xue Dou, Zhenxiang Cheng

Australian Institute for Innovative Materials - Papers

The wide ranging magnetic behavior in intermetallic compounds continues to attract broad interest. Effective control of their magnetic properties is of great importance for fundamental research and potential applications. In this work the structural and magnetic properties of TbCo2Mnx compounds are studied by a combination of temperature dependent synchrotron x-ray diffraction, neutron powder diffraction, specific heat, and magnetic measurements. Magnetization measurements show that the addition of Mn can modify the magnetic behavior significantly: first, the magnetic transition temperatures increase from ∼227 K to 332 K with x = 0.0 to 0.3; secondly, the nature of the magnetic transitions change from …

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Composite Photocatalysts Containing Bivo4 For Degradation Of Cationic Dyes, Kanlaya Pingmuang, Jun Chen, Wiyong Kangwansupamonkon, Gordon G. Wallace, Sukon Phanichphant, Andrew Nattestad Jan 2017

Composite Photocatalysts Containing Bivo4 For Degradation Of Cationic Dyes, Kanlaya Pingmuang, Jun Chen, Wiyong Kangwansupamonkon, Gordon G. Wallace, Sukon Phanichphant, Andrew Nattestad

Australian Institute for Innovative Materials - Papers

The creation of composite structures is a commonly employed approach towards enhanced photocatalytic performance, with one of the key rationales for doing this being to separate photoexcited charges, afording them longer lifetimes in which to react with adsorbed species. Here we examine three composite photocatalysts using either WO3, TiO2 or CeO2 with BiVO4 for the degradation of model dyes Methylene Blue and Rhodamine B. Each of these materials (WO3, TiO2 or CeO2) has a diferent band edge energy ofset with respect to BiVO4, allowing for a systematic comparison of these diferent arrangements. It is seen that while these ofsets can …

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Anisotropic Thermomagnetic Avalanche Activity In Field-Cooled Superconducting Films, F Colauto, D Carmo, A M H De Andrade, A A M Oliveira, Wilson Aires Ortiz, Tom H. Johansen Jan 2017

Anisotropic Thermomagnetic Avalanche Activity In Field-Cooled Superconducting Films, F Colauto, D Carmo, A M H De Andrade, A A M Oliveira, Wilson Aires Ortiz, Tom H. Johansen

Australian Institute for Innovative Materials - Papers

The electrodynamic behavior of isotropic superconducting Nb films cooled below their critical temperature in the presence of in-plane applied magnetic fields is investigated using magneto-optical imaging. A specially designed local flux injector is used to show that the frozen-in in-plane vortices strongly guide and enhance the penetration of perpendicular vortices, whereas their penetration across the array of in-plane vortices is essentially unchanged. This result provides the key to understanding why field-cooled square superconducting films show anisotropic nucleation of flux avalanches (jumps) along the four edges. The explanation is based on an analytical model for thermomagnetic avalanche nucleation in type-II superconducting …

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Development Of A Porous 3d Graphene-Pdms Scaffold For Improved Osseointegration, Jianfeng Li, Xiao Liu, Jeremy Micah Crook, Gordon G. Wallace Jan 2017

Development Of A Porous 3d Graphene-Pdms Scaffold For Improved Osseointegration, Jianfeng Li, Xiao Liu, Jeremy Micah Crook, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

Osseointegration in orthopedic surgery plays an important role for bone implantation success. Traditional treatment of implant surface aimed at improved osseointegration has limited capability for its poor performance in supporting cell growth and proliferation. Polydimethylsiloxane (PDMS) is a widely used silicon-based organic polymer material with properties that are useful in cosmetics, domestic applications and mechanical engineering. In addition, the biocompatibility of PDMS, in part due to the high solubility of oxygen, makes it an ideal material for cell-based implants. Notwithstanding its potential, a property that can inhibit PDMS bioactivity is the high hydrophobicity, limiting its use to date in tissue …

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Confined Naalh4nanoparticles Inside Ceo2hollow Nanotubes Towards Enhanced Hydrogen Storage, Qili Gao, Guanglin Xia, Xuebin Yu Jan 2017

Confined Naalh4nanoparticles Inside Ceo2hollow Nanotubes Towards Enhanced Hydrogen Storage, Qili Gao, Guanglin Xia, Xuebin Yu

Australian Institute for Innovative Materials - Papers

NaAlH 4 has been widely regarded as a potential hydrogen storage material due to its favorable thermodynamics and high energy density. The high activation energy barrier and high dehydrogenation temperature, however, significantly hinder its practical application. In this paper, CeO 2 hollow nanotubes (HNTs) prepared by a simple electrospinning technique are adopted as functional scaffolds to support NaAlH 4 nanoparticles (NPs) towards advanced hydrogen storage performance. The nanoconfined NaAlH 4 inside CeO 2 HNTs, synthesized via the infiltration of molten NaAlH 4 into the CeO 2 HNTs under high hydrogen pressure, exhibited significantly improved dehydrogenation properties compared with both bulk …

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Synthesis And Light-Harvesting Potential Of Cyanovinyl Β-Substituted Porphyrins And Dyads, Rhys Mitchell, Klaudia K. Wagner, Jonathan E. Barnsley, Holly Van Der Salm, Keith C. Gordon, David L. Officer, Pawel W. Wagner Jan 2017

Synthesis And Light-Harvesting Potential Of Cyanovinyl Β-Substituted Porphyrins And Dyads, Rhys Mitchell, Klaudia K. Wagner, Jonathan E. Barnsley, Holly Van Der Salm, Keith C. Gordon, David L. Officer, Pawel W. Wagner

Australian Institute for Innovative Materials - Papers

Knoevenagel condensation has been utilized as an alternative way to synthesize a series of β-vinyl-substituted porphyrins and porphyrin dyads with good to excellent yields. The condensation of β-formyl porphyrins and phenylacetonitriles allows control of the substitution pattern and metal centres in the porphyrin dyads, allowing the use of metallated synthons. While the optical and electronic properties of the resulting porphyrin dyes are perturbed by the presence of the cyano substituent, this does not significantly affect their use. For example, Raman spectroscopy, in agreement with density functional theory (DFT) and time-dependent DFT (TD-DFT) calculations, show porphyrin electronic transitions with delocalization of …

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Carbon-Encapsulated Sn@N-Doped Carbon Nanotubes As Anode Materials For Application In Sibs, Boyang Ruan, Haipeng Guo, Yuyang Hou, Qiannan Liu, Yuan-Fu Deng, Guohua Chen, Shulei Chou, Hua-Kun Liu, Jiazhao Wang Jan 2017

Carbon-Encapsulated Sn@N-Doped Carbon Nanotubes As Anode Materials For Application In Sibs, Boyang Ruan, Haipeng Guo, Yuyang Hou, Qiannan Liu, Yuan-Fu Deng, Guohua Chen, Shulei Chou, Hua-Kun Liu, Jiazhao Wang

Australian Institute for Innovative Materials - Papers

Carbon-encapsulated Sn@N-doped carbon tubes with submicron diameters were obtained via the simple reduction of C@SnO 2 @N-doped carbon composites that were fabricated by a hydrothermal approach. Sn nanoparticles encapsulated in carbon layers were distributed uniformly on the surfaces of the N-doped carbon nanotubes. The electrochemical performances of the composites were systematically investigated as anode materials in sodium-ion batteries (SIBs). The composite electrode could attain a good reversible capacity of 398.4 mAh g -1 when discharging at 100 mA g -1 , with capacity retention of 67.3% and very high Coulombic efficiency of 99.7% over 150 cycles. This good cycling performance, …

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Same Titanium Glycolate Precursor But Different Products: Successful Synthesis Of Twinned Anatase Tio2 Nanocrystals With Excellent Solar Photocatalytic Hydrogen Evolution Capability, Gang Cheng, Yi Wei, Jinyan Xiong, Yixin Gan, Jiaxin Zhu, Feifan Xu Jan 2017

Same Titanium Glycolate Precursor But Different Products: Successful Synthesis Of Twinned Anatase Tio2 Nanocrystals With Excellent Solar Photocatalytic Hydrogen Evolution Capability, Gang Cheng, Yi Wei, Jinyan Xiong, Yixin Gan, Jiaxin Zhu, Feifan Xu

Australian Institute for Innovative Materials - Papers

Exploiting a synthesis protocol to tailor TiO 2 with a unique morphology and crystal phase has received considerable interest in the energy and environmental fields. We here describe the use of a titanium glycolate precursor in a hydrothermal hydrolysis reaction to engineer TiO 2 nanocrystals with different crystal phases and structures. Anatase TiO 2 nanocrystals with twinned structures were obtained by using a lower amount of NaOH in the hydrolysis system, while brookite TiO 2 nanocrystals were formed when higher amounts of NaOH were employed. The as-synthesized different TiO 2 nanocrystals have a suitable bandgap to harvest photons and a …

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Anti-Site-Induced Diverse Diluted Magnetism In Limgpdsb-Type Comntisi Alloy, T T. Lin, Xuefang Dai, Ruikang Guo, Zhenxiang Cheng, L Wang, Xiaotian Wang, Guodong Liu Jan 2017

Anti-Site-Induced Diverse Diluted Magnetism In Limgpdsb-Type Comntisi Alloy, T T. Lin, Xuefang Dai, Ruikang Guo, Zhenxiang Cheng, L Wang, Xiaotian Wang, Guodong Liu

Australian Institute for Innovative Materials - Papers

The effect of three kinds of anti-site disorder to electronic structure and magnetic properties of the LiMgPdSb-type CoMnTiSi alloy are investigated. It was found the Mn-Ti anti-site disorder can induce the diluted magnetism in CoMnTiSi matrix. The magnetic structure has an oscillation between the ferromagnetic and antiferromagnetic states with the different degree of Mn-Ti anti-site disorder. Two novel characteristics: the diluted antiferromagnetic half-metallicity and the diluted zero-gap half-metallity are found in the different degree range of the Mn-Ti anti-site disorder. The Co-Mn and Co-Ti anti-site disorder have little effect on the magnetic properties. The width of energy gap and the …

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L2(1) And Xa Ordering Competition In Hafnium-Based Full-Heusler Alloys Hf(2)Vz (Z = Al, Ga, In, Tl, Si, Ge, Sn, Pb), Xiaotian Wang, Zhenxiang Cheng, Wenhong Wang Jan 2017

L2(1) And Xa Ordering Competition In Hafnium-Based Full-Heusler Alloys Hf(2)Vz (Z = Al, Ga, In, Tl, Si, Ge, Sn, Pb), Xiaotian Wang, Zhenxiang Cheng, Wenhong Wang

Australian Institute for Innovative Materials - Papers

For theoretical designing of full-Heusler based spintroinc materials, people have long believed in the so-called Site Preference Rule (SPR). Very recently, according to the SPR, there are several studies on XA-type Hafnium-based Heusler alloys X2YZ, i.e., Hf2VAl, Hf2CoZ (Z = Ga, In) and Hf2CrZ (Z = Al, Ga, In). In this work, a series of Hf2-based Heusler alloys, Hf2VZ (Z = Al, Ga, In, Tl, Si, Ge, Sn, Pb), were selected as targets to study the site preferences of their atoms by first-principle calculations. It has been found that all of them are likely to exhibit the L21-type structure instead …

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Short Oxygen Plasma Treatment Leading To Long-Term Hydrophilicity Of Conductive Pcl-Ppy Nanofiber Scaffolds, Sajjad Shafei, Javad Foroughi, Zhiqiang Chen, Cynthia S. Wong, Minoo Naebe Jan 2017

Short Oxygen Plasma Treatment Leading To Long-Term Hydrophilicity Of Conductive Pcl-Ppy Nanofiber Scaffolds, Sajjad Shafei, Javad Foroughi, Zhiqiang Chen, Cynthia S. Wong, Minoo Naebe

Australian Institute for Innovative Materials - Papers

No abstract provided.

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Ultra-Light And Flexible Pencil-Trace Anode For High Performance Potassium-Ion And Lithium-Ion Batteries, Zhixin Tai, Yajie Liu, Qing Zhang, Tengfei Zhou, Zaiping Guo, Hua-Kun Liu, Shi Xue Dou Jan 2017

Ultra-Light And Flexible Pencil-Trace Anode For High Performance Potassium-Ion And Lithium-Ion Batteries, Zhixin Tai, Yajie Liu, Qing Zhang, Tengfei Zhou, Zaiping Guo, Hua-Kun Liu, Shi Xue Dou

Australian Institute for Innovative Materials - Papers

Engineering design of battery configurations and new battery system development are alternative approaches to achieve high performance batteries. A novel flexible and ultra-light graphite anode is fabricated by simple friction drawing on filter paper with a commercial 8B pencil. Compared with the traditional anode using copper foil as current collector, this innovative current-collector-free design presents capacity improvement of over 200% by reducing the inert weight of the electrode. The as-prepared pencil-trace electrode exhibits excellent rate performance in potassium-ion batteries (KIBs), significantly better than in lithium-ion batteries (LIBs), with capacity retention of 66% for the KIB vs. 28% for the LIB …

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