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Articles 511 - 540 of 1524
Full-Text Articles in Physical Sciences and Mathematics
Platinum-Cobalt Bimetallic Nanoparticles With Pt Skin For Electro-Oxidation Of Ethanol, Binwei Zhang, Tian Sheng, Yunxiao Wang, Xi-Ming Qu, Jun-Ming Zhang, Zong-Cheng Zhang, Hong-Gang Liao, Fu-Chun Zhu, Shi Xue Dou, Yan-Xia Jiang, Shi-Gang Sun
Platinum-Cobalt Bimetallic Nanoparticles With Pt Skin For Electro-Oxidation Of Ethanol, Binwei Zhang, Tian Sheng, Yunxiao Wang, Xi-Ming Qu, Jun-Ming Zhang, Zong-Cheng Zhang, Hong-Gang Liao, Fu-Chun Zhu, Shi Xue Dou, Yan-Xia Jiang, Shi-Gang Sun
Australian Institute for Innovative Materials - Papers
In order to maximize the Pt utilization in catalysts and improve catalytic processes, we report a convenient strategy for preparation of Pt3Co with Pt-skin structured bimetallic nanocatalysts directly supported on porous graphitic carbon. Notably, the thickness of the Pt-skin is only 1-2 atomic layers, about 0.5 nm. Surprisingly, the bimetallic nanocatalysts composed of Pt3Co with Pt-skin are first used as ethanol electro-catalysts, with the mass activity of 0.79 mA ¿gPt-1, which is a 250% enhancement compared with commercial Pt/C (0.32 mA ¿gPt-1). On the basis of the results of electrochemical in situ Fourier transform infrared spectroscopy (FTIRS) and density functional …
Silica Nanoparticles Functionalized With Zwitterionic Sulfobetaine Siloxane For Application As A Versatile Antifouling Coating System, Brianna Knowles, Pawel W. Wagner, Shane A. Maclaughlin, Michael J. Higgins, Paul J. Molino
Silica Nanoparticles Functionalized With Zwitterionic Sulfobetaine Siloxane For Application As A Versatile Antifouling Coating System, Brianna Knowles, Pawel W. Wagner, Shane A. Maclaughlin, Michael J. Higgins, Paul J. Molino
Australian Institute for Innovative Materials - Papers
The growing need to develop surfaces able to effectively resist biological fouling has resulted in the widespread investigation of nanomaterials with potential antifouling properties. However, the preparation of effective antifouling coatings is limited by the availability of reactive surface functional groups and our ability to carefully control and organize chemistries at a materials' interface. Here, we present two methods of preparing hydrophilic low-fouling surface coatings through reaction of silica-nanoparticle suspensions and predeposited silicananoparticle films with zwitterionic sulfobetaine (SB). Silica-nanoparticle suspensions were functionalized with SB across three pH conditions and deposited as thin films via a simple spin-coating process to generate …
Mo2c/Cnt: An Efficient Catalyst For Rechargeable Li–Co2 Batteries, Yuyang Hou, Jiazhao Wang, Lili Liu, Yuqing Liu, Shulei Chou, Dongqi Shi, Hua-Kun Liu, Yu-Ping Wu, Weimin Zhang, Jun Chen
Mo2c/Cnt: An Efficient Catalyst For Rechargeable Li–Co2 Batteries, Yuyang Hou, Jiazhao Wang, Lili Liu, Yuqing Liu, Shulei Chou, Dongqi Shi, Hua-Kun Liu, Yu-Ping Wu, Weimin Zhang, Jun Chen
Australian Institute for Innovative Materials - Papers
The rechargeable Li-CO2 battery is a novel and promising energy storage system with the capability of CO2 capture due to the reversible reaction between lithium ions and carbon dioxide. Carbon materials as the cathode, however, limit both the cycling performance and the energy efficiency of the rechargeable Li-CO2 battery, due to the insulating Li2CO3 formed in the discharge process, which is difficult to decompose in the charge process. Here, a Mo2C/carbon nanotube composite material is developed as the cathode for the rechargeable Li-CO2 battery and can achieve high energy efficiency (77%) and improved cycling performance (40 cycles). A related mechanism …
Atomic-Scale Coox Species In Metal-Organic Frameworks For Oxygen Evolution Reaction, Shuo Dou, Chung-Li Dong, Zhe Hu, Jeng-Lung Chen, Yu-Cheng Huang, Li Tao, Dafeng Yan, Dawei Chen, Shaohua Shen, Shulei Chou, Shuangyin Wang
Atomic-Scale Coox Species In Metal-Organic Frameworks For Oxygen Evolution Reaction, Shuo Dou, Chung-Li Dong, Zhe Hu, Jeng-Lung Chen, Yu-Cheng Huang, Li Tao, Dafeng Yan, Dawei Chen, Shaohua Shen, Shulei Chou, Shuangyin Wang
Australian Institute for Innovative Materials - Papers
The activity of electrocatalysts strongly depends on the number of active sites, which can be increased by downsizing electrocatalysts. Single-atom catalysts have attracted special attention due to atomic-scale active sites. However, it is a huge challenge to obtain atomic-scale CoO x catalysts. The Co-based metal-organic frameworks (MOFs) own atomically dispersed Co ions, which motivates to design a possible pathway to partially on-site transform these Co ions to active atomic-scale CoO x species, while reserving the highly porous features of MOFs. In this work, for the first time, the targeted on-site formation of atomic-scale CoO x species is realized in ZIF-67 …
From Flatscreen Tvs To Your Smartphone: The Element Boron Deserves More Attention, Zhenguo Huang
From Flatscreen Tvs To Your Smartphone: The Element Boron Deserves More Attention, Zhenguo Huang
Australian Institute for Innovative Materials - Papers
Each time you watch sport on a flatscreen television, or send a message by touching your smartphone screen, give thanks to an unsung hero of the periodic table: boron.
Human Skin Interactive Self-Powered Wearable Piezoelectric Bio-E-Skin By Electrospun Poly-L-Lactic Acid Nanofibers For Non-Invasive Physiological Signal Monitoring, Ayesha Sultana, Sujoy Ghosh, Vitor Sencadas, Tian Zheng, Michael J. Higgins, Tapas Middya, Dipankar Mandal
Human Skin Interactive Self-Powered Wearable Piezoelectric Bio-E-Skin By Electrospun Poly-L-Lactic Acid Nanofibers For Non-Invasive Physiological Signal Monitoring, Ayesha Sultana, Sujoy Ghosh, Vitor Sencadas, Tian Zheng, Michael J. Higgins, Tapas Middya, Dipankar Mandal
Australian Institute for Innovative Materials - Papers
Flexible and wearable piezoelectric bio e-skin (PBio-e-skin) based on electrospun poly(l-lactic acid) PLLA nanofiber membrane is demonstrated for non-invasive human physiological signal monitoring and detecting dynamic tactile stimuli. The molecular orientations of the CO dipoles by electrospinning technique result in a longitudinal piezoelectric charge co-efficient (d 33 ) value of ∼(3 ± 1) pm V -1 realized by piezoresponse force microscopy, allowing the PBio-e-skin for pressure sensing applications. The robust mechanical strength (Young's modulus ∼50 MPa) of nanofiber membrane ensures PBio-e-skin's superior operational stability over 375000 cycles. Owing to the superior mechanosensitivity of ∼22 V N -1 , PBio-e-skin has …
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
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 …
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
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) ! …
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
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. …
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
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 …
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
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 …
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
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 …
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
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 …
Demetallatation Of Electrochemically Polymerised Mn Porphyrin Anion / Pedot Composites Under Light-Illumination, Danijel Boskovic, Sivakumar Balakrishnan, Pawel W. Wagner, Gerhard F. Swiegers
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. …
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
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 …
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
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 …
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
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 …
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
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 …
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
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 …
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
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 …
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
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 …
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
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 …
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
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 …
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
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 …
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
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 …
Composite Photocatalysts Containing Bivo4 For Degradation Of Cationic Dyes, Kanlaya Pingmuang, Jun Chen, Wiyong Kangwansupamonkon, Gordon G. Wallace, Sukon Phanichphant, Andrew Nattestad
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 …
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
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 …
Development Of A Porous 3d Graphene-Pdms Scaffold For Improved Osseointegration, Jianfeng Li, Xiao Liu, Jeremy Micah Crook, Gordon G. Wallace
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 …
Confined Naalh4nanoparticles Inside Ceo2hollow Nanotubes Towards Enhanced Hydrogen Storage, Qili Gao, Guanglin Xia, Xuebin Yu
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 …
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
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 …