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Articles 211 - 240 of 4868

Full-Text Articles in Physical Sciences and Mathematics

Jute-Derived Microporous/Mesoporous Carbon With Ultra-High Surface Area Using A Chemical Activation Process, Junayet Hossain Khan, Freddy Marpaung, Christine Young, Jianjian Lin, Md Tofazzal Islam, Saad M. Alshehri, Tansir Ahamad, Norah Alhokbany, Katsuhiko Ariga, Lok Kumar Shrestha, Yusuke Yamauchi, Kevin C.-W Wu, Md. Shahriar Al Hossain, Jeonghun Kim Jan 2019

Jute-Derived Microporous/Mesoporous Carbon With Ultra-High Surface Area Using A Chemical Activation Process, Junayet Hossain Khan, Freddy Marpaung, Christine Young, Jianjian Lin, Md Tofazzal Islam, Saad M. Alshehri, Tansir Ahamad, Norah Alhokbany, Katsuhiko Ariga, Lok Kumar Shrestha, Yusuke Yamauchi, Kevin C.-W Wu, Md. Shahriar Al Hossain, Jeonghun Kim

Australian Institute for Innovative Materials - Papers

Here, we report the synthesis of nanoporous carbons (NCs) derived from a low-cost and renewable biomass, jute, by a chemical activation process using KOH. Jute is one of the least expensive and most abundant crops, with a staggering 2.8 million metric tons of jute produced each year. In this study, we synthesize NCs from three different parts of jute fibers through a chemical activation technique using KOH. The NCs prepared from the bottom portion of the fiber show a high surface area (2682 m2g−1) with the presence of both micropores and mesopores. The ultra-high surface area of jute makes it …

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Electrochemical Potassium/Lithium-Ion Intercalation Into Tise2: Kinetics And Mechanism, Peng Li, Xiaobo Zheng, Haoxiang Yu, Guoqiang Zhao, Jie Shu, Xun Xu, Wenping Sun, Shi Xue Dou Jan 2019

Electrochemical Potassium/Lithium-Ion Intercalation Into Tise2: Kinetics And Mechanism, Peng Li, Xiaobo Zheng, Haoxiang Yu, Guoqiang Zhao, Jie Shu, Xun Xu, Wenping Sun, Shi Xue Dou

Australian Institute for Innovative Materials - Papers

As one promising candidate for next-generation energy storage systems, K-ion batteries (KIBs) attract increasing research attention due to the element abundance, low cost, and competent energy density as compared to Li-ion batteries. However, developing practical electrode materials in particular cathodes for KIBs is still in its infancy, and the related reaction mechanisms of the electrode materials are far from completely understood. In this work, TiSe2was, for the first time, investigated as an intercalated-type electrode for potassium storage due to its large interlayer space. The potassiation/depotassiation reaction mechanism was unraveled based on the analysis of in-situ X-ray diffraction (XRD), ex-situ X-ray …

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Functionalizing Graphene With Titanate Coupling Agents As Reinforcement For One-Component Waterborne Poly(Urethane-Acrylate) Anticorrosion Coatings, Haihua Wang, Yu He, Guiqiang Fei, Caiyun Wang, Yiding Shen, Ke Zhu, Liyu Sun, Nana Rang, Danhui Guo, Gordon G. Wallace Jan 2019

Functionalizing Graphene With Titanate Coupling Agents As Reinforcement For One-Component Waterborne Poly(Urethane-Acrylate) Anticorrosion Coatings, Haihua Wang, Yu He, Guiqiang Fei, Caiyun Wang, Yiding Shen, Ke Zhu, Liyu Sun, Nana Rang, Danhui Guo, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

Achieving a uniform dispersion of reduced graphene oxide (RGO) nanosheets in waterborne polymer matrix remains a challenge. Here, we significantly improved the dispersion stability of RGO in a polymer matrix through functionalizing RGO with titanate coupling agent of different dendritic structure. Titanate coupling agents of two branched dioctylpyrophosphate (T2) and three branched dioctylpyrophosphate (T3) were used. Rather than simply blending graphene with polymer matrix, functionalized graphene (T2-RGO or T3-RGO) was introduced into the reaction system with monomers to participate in the polymerization; resulting in improved compatibility and interaction between the graphene and polymer, especially for T3-RGO. One-component waterborne poly (urethane-acrylate) …

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New Monatomic Layer Clusters For Advanced Catalysis Materials, Binwei Zhang, Long Ren, Yunxiao Wang, Yi Du, Lei Jiang, Shi Xue Dou Jan 2019

New Monatomic Layer Clusters For Advanced Catalysis Materials, Binwei Zhang, Long Ren, Yunxiao Wang, Yi Du, Lei Jiang, Shi Xue Dou

Australian Institute for Innovative Materials - Papers

Noble metals have been widely applied as catalysts in chemical production, energy conversion, and emission control [1-3], but their high cost and scarcity are major obstacles for any large-scale practical applications. It is therefore of great interest to explore new active material systems that require less mass loading of noble metal catalysts but with even better performance. Recently, intense research has been devoted towards downsizing the noble metals into single-atom catalysts (SACs) [4,5]. SACs, with single-atom active centers, were first reported by Qiao et al. [4]. They synthesized a single Pt atom catalyst supported on FeOx (Pt1/FeOx), which offered extremely …

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Iron-Doped Nickel Molybdate With Enhanced Oxygen Evolution Kinetics, Jiayi Chen, Guoqiang Zhao, Yaping Chen, Kun Rui, Hui Mao, Shi Xue Dou, Wenping Sun Jan 2019

Iron-Doped Nickel Molybdate With Enhanced Oxygen Evolution Kinetics, Jiayi Chen, Guoqiang Zhao, Yaping Chen, Kun Rui, Hui Mao, Shi Xue Dou, Wenping Sun

Australian Institute for Innovative Materials - Papers

Electrochemical water splitting is one of the potential approaches for making renewable energy production and storage viable. The oxygen evolution reaction (OER), as a sluggish four-electron electrochemical reaction, has to overcome high overpotential to accomplish overall water splitting. Therefore, developing low-cost and highly active OER catalysts is the key for achieving efficient and economical water electrolysis. In this work, Fe-doped NiMoO4 was synthesized and evaluated as the OER catalyst in alkaline medium. Fe3+ doping helps to regulate the electronic structure of Ni centers in NiMoO4, which consequently promotes the catalytic activity of NiMoO4. The overpotential to reach a current density …

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Defect-Induced Pt-Co-Se Coordinated Sites With Highly Asymmetrical Electronic Distribution For Boosting Oxygen-Involving Electrocatalysis, Linzhou Zhuang, Yi Jia, Hongli Liu, Xin Wang, Rosalie K. Hocking, Hongwei Liu, Jun Chen, Lei Ge, Longzhou Zhang, Mengran Li, Chung-Li Dong, Yu-Cheng Huang, Shaohua Shen, Dongjiang Yang, Zhonghua Zhu, Xiangdong Yao Jan 2019

Defect-Induced Pt-Co-Se Coordinated Sites With Highly Asymmetrical Electronic Distribution For Boosting Oxygen-Involving Electrocatalysis, Linzhou Zhuang, Yi Jia, Hongli Liu, Xin Wang, Rosalie K. Hocking, Hongwei Liu, Jun Chen, Lei Ge, Longzhou Zhang, Mengran Li, Chung-Li Dong, Yu-Cheng Huang, Shaohua Shen, Dongjiang Yang, Zhonghua Zhu, Xiangdong Yao

Australian Institute for Innovative Materials - Papers

Rational design and synthesis of hetero-coordinated moieties at the atomic scale can significantly raise the performance of the catalyst and obtain mechanistic insight into the oxygen-involving electrocatalysis. Here, a facile plasma-photochemical strategy is applied to construct atomically coordinated Pt-Co-Se moieties in defective CoSe2 (CoSe2−x) through filling the plasma-created Se vacancies in CoSe2−x with single Pt atomic species (CoSe2−x-Pt) under ultraviolet irradiation. The filling of single Pt can remarkably enhance the oxygen evolution reaction (OER) activity of CoSe2. Optimal OER specific activity is achieved with a Pt content of 2.25 wt% in CoSe2−x-Pt, exceeding that of CoSe2−x by a factor of …

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Heteroatom-Doped Mose2 Nanosheets With Enhanced Hydrogen Evolution Kinetics For Alkaline Water Splitting, Guoqiang Zhao, Xingyong Wang, Shaolan Wang, Kun Rui, Yaping Chen, Haibo Yu, Jing Ma, Shi Xue Dou, Wenping Sun Jan 2019

Heteroatom-Doped Mose2 Nanosheets With Enhanced Hydrogen Evolution Kinetics For Alkaline Water Splitting, Guoqiang Zhao, Xingyong Wang, Shaolan Wang, Kun Rui, Yaping Chen, Haibo Yu, Jing Ma, Shi Xue Dou, Wenping Sun

Australian Institute for Innovative Materials - Papers

Electrochemical water splitting for hydrogen generation is a vital part for the prospect of future energy systems, however, the practical utilization relies on the development of highly active and earth-abundant catalysts to boost the energy conversion efficiency as well as reduce the cost. Molybdenum diselenide (MoSe2) is a promising nonprecious metal-based electrocatalyst for hydrogen evolution reaction (HER) in acidic media, but it exhibits inferior alkaline HER kinetics in great part due to the sluggish water adsorption/dissociation process. Herein, the alkaline HER kinetics of MoSe2 is substantially accelerated by heteroatom doping with transition metal ions. Specifically, the Ni-doped MoSe2 nanosheets exhibit …

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Hydrogen-Containing Na3hti1- Xmnxf8 Narrow-Band Phosphor For Light-Emitting Diodes, Muhuai Fang, Tsun Yang, Tadeusz Lesniewski, Chi Lee, Sebastian Mahlik, Marek Grinberg, Vanessa K. Peterson, Christophe R. Didier, Wei Kong Pang, Chaochin Su, Ru-Shi Liu Jan 2019

Hydrogen-Containing Na3hti1- Xmnxf8 Narrow-Band Phosphor For Light-Emitting Diodes, Muhuai Fang, Tsun Yang, Tadeusz Lesniewski, Chi Lee, Sebastian Mahlik, Marek Grinberg, Vanessa K. Peterson, Christophe R. Didier, Wei Kong Pang, Chaochin Su, Ru-Shi Liu

Australian Institute for Innovative Materials - Papers

We synthesize the phosphor Na3HTi1-xMnxF8 (Na3HTiF8:Mn4+) material series using a coprecipitation method. We determine the complete phase and crystallographic structure of the Na3HTiF8 series end-member, including the determination of the H atoms at the 4b (0, 1/2, 0) crystallographic site within the Cmcm space group symmetry structure, resulting in a quantum efficiency of ∼44%, which is comparative to the Na2SiF6:Mn4+ phosphor materials. We successfully model the luminescent properties of the Na3HTi1-xMnxF8 material …

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Tunable Solution-Processable Anodic Exfoliated Graphene, Chong Yong Lee, David R. G Mitchell, Paul J. Molino, Adam Fahy, Gordon G. Wallace Jan 2019

Tunable Solution-Processable Anodic Exfoliated Graphene, Chong Yong Lee, David R. G Mitchell, Paul J. Molino, Adam Fahy, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

Electrochemical exfoliation of graphite is an emerging approach to provide large scale, low cost, efficient and reliable production of high quality, low defect and solution-processable graphene. The use of a sulphuric acid electrolyte allows rapid and efficient anodic graphite exfoliation. However, the highly oxidative process in this electrolyte promotes hydroxyl radicals. These degrade the carbon lattice structurally, hence compromising the quality of graphene produced. Here, we report a simple and effective way to overcome this challenge; the use of an additive to scavenge hydroxyl radicals. The addition of a small volume percentage of ethylene glycol acts to scavenge hydroxyl radicals. …

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Electrochemical Co2 Reduction Over Nitrogen-Doped Sno2 Crystal Surfaces, Yuefeng Zhang, Jianjun Liu, Zengxi Wei, Quanhui Liu, Caiyun Wang, Jianmin Ma Jan 2019

Electrochemical Co2 Reduction Over Nitrogen-Doped Sno2 Crystal Surfaces, Yuefeng Zhang, Jianjun Liu, Zengxi Wei, Quanhui Liu, Caiyun Wang, Jianmin Ma

Australian Institute for Innovative Materials - Papers

Crystal planes of a catalyst play crucial role in determining the electrocatalytic performance for CO2reduction. The catalyst SnO2can convert CO2molecules into valuable formic acid (HCOOH). Incorporating heteroatom N into SnO2further improves its catalytic activity. To understand the mechanism and realize a highly efficient CO2-to-HCOOH conversion, we used density functional theory (DFT) to calculate the free energy of CO2reduction reactions (CO2RR) on different crystal planes of N-doped SnO2(N-SnO2). The results indicate that N-SnO2lowered the activation energy of intermediates leading to a better catalytic performance than pure SnO2. We also discovered that the N-SnO2(211) plane possesses the most suitable free energy during …

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Recent Advances In 3d Graphene Architectures And Their Composites For Energy Storage Applications, Zhijie Wang, Hong Gao, Qing Zhang, Yuqing Liu, Jun Chen, Zaiping Guo Jan 2019

Recent Advances In 3d Graphene Architectures And Their Composites For Energy Storage Applications, Zhijie Wang, Hong Gao, Qing Zhang, Yuqing Liu, Jun Chen, Zaiping Guo

Australian Institute for Innovative Materials - Papers

Graphene is widely applied as an electrode material in energy storage fields. However, the strong π-π interaction between graphene layers and the stacking issues lead to a great loss of electrochemically active surface area, damaging the performance of graphene electrodes. Developing 3D graphene architectures that are constructed of graphene sheet subunits is an effective strategy to solve this problem. The graphene architectures can be directly utilized as binder-free electrodes for energy storage devices. Furthermore, they can be used as a matrix to support active materials and further improve their electrochemical performance. Here, recent advances in synthesizing 3D graphene architectures and …

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A Simple Technique For Development Of Fibres With Programmable Microsphere Concentration Gradients For Local Protein Delivery, Fahimeh Mehrpouya, Zhilian Yue, Anthony C. Romeo, Robert A. Gorkin Iii, Robert M. I Kapsa, Simon E. Moulton, Gordon G. Wallace Jan 2019

A Simple Technique For Development Of Fibres With Programmable Microsphere Concentration Gradients For Local Protein Delivery, Fahimeh Mehrpouya, Zhilian Yue, Anthony C. Romeo, Robert A. Gorkin Iii, Robert M. I Kapsa, Simon E. Moulton, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

Alginate has been a biologically viable option for controlled local delivery of bioactive molecules in vitro and in vivo. Specific bioactive molecule release profiles are achieved often by controlling polymer composition/concentration, which also determines the modulus of hydrogels. This largely limits alginate-mediated bioactive molecule delivery to single-factors of uniform concentration applications, rather than applications that may require (multiple) bioactive molecules delivered at a concentration gradient for chemotactic purposes. Here we report a two-phase PLGA/alginate delivery system composed of protein-laden poly-d,l-lactic-co-glycolic acid (PLGA) microspheres wet-spun into alginate fibres. Fluorescein isothiocyanate-conjugated bovine serum albumin (FITC-BSA) was used as a model protein and …

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Microporous Materials Formed Via Intercalation Of Ultrathin Coordination Polymers In A Layered Silicate, Yusuke Ide, Satoshi Tominaka, Taiki Okuyama, Nao Tsunoji, Koji Ohara, Masanori Mitome, Tsuneji Sano, Yoshio Bando, Dmitri Golberg Jan 2019

Microporous Materials Formed Via Intercalation Of Ultrathin Coordination Polymers In A Layered Silicate, Yusuke Ide, Satoshi Tominaka, Taiki Okuyama, Nao Tsunoji, Koji Ohara, Masanori Mitome, Tsuneji Sano, Yoshio Bando, Dmitri Golberg

Australian Institute for Innovative Materials - Papers

Development of microporous materials, like zeolites and metal-organic frameworks (MOFs), with unique and better properties, is crucially important, while yet challenging, for many energy applications. Herein, we report on a new family of microporous hybrids having well-defined permanent porosity, which is formed by pillaring a layered silicate with packed coordination polymers. This inorganic-organic hybrid material, having well-defined/two-faced micropores surrounded by the polymers and silicate walls, exhibits superior adsorption toward methanol due to co-operative interactions compared with conventional microporous materials. The material could be used as an adsorbent to selectively and effectively recover methanol from a methanol/water vapour mixture.

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Zwitterion Functionalized Silica Nanoparticle Coatings: The Effect Of Particle Size On Protein, Bacteria, And Fungal Spore Adhesion, Brianna Knowles, Dan Yang, Pawel W. Wagner, Shane A. Maclaughlin, Michael J. Higgins, Paul J. Molino Jan 2019

Zwitterion Functionalized Silica Nanoparticle Coatings: The Effect Of Particle Size On Protein, Bacteria, And Fungal Spore Adhesion, Brianna Knowles, Dan Yang, Pawel W. Wagner, Shane A. Maclaughlin, Michael J. Higgins, Paul J. Molino

Australian Institute for Innovative Materials - Papers

The negative impacts that arise from biologicalfouling of surfaces have driven the development of coatingswith unique physical and chemical properties that are able toprevent interactions with fouling species. Here, we report onlow-fouling hydrophilic coatings presenting nanoscaledfeatures prepared from different size silica nanoparticles(SiNPs) functionalized with zwitterionic chemistries. Zwitter-ionic sulfobetaine siloxane (SB) was reacted to SiNPs rangingin size from 7 to 75 nm. Particle stability and grafting densitywere confirmed using dynamic light scattering and thermog-ravimetric analysis. Thin coatings of nanoparticles were prepared by spin-coating aqueous particle suspensions. The resultingcoatings were characterized using scanning electron microscopy, atomic force microscopy, and contact angle goniometry. …

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G-C3n4-Based Films: A Rising Star For Photoelectrochemical Water Splitting, Liqun Wang, Yueyu Tong, Jianmin Feng, Jungang Hou, Jing Li, Xinggang Hou, Ji Liang Jan 2019

G-C3n4-Based Films: A Rising Star For Photoelectrochemical Water Splitting, Liqun Wang, Yueyu Tong, Jianmin Feng, Jungang Hou, Jing Li, Xinggang Hou, Ji Liang

Australian Institute for Innovative Materials - Papers

Graphitic carbon nitride (g-C3N4), as a new type of polymeric semiconductor, has been regarded as a promising photoelectrode material for efficient photoelectrochemical (PEC) water splitting for hydrogen production due to its suitable band structure for water splitting reaction, certain range of visible-light absorption, non-toxicity, low cost, and good stability. However, there are many obstacles impeding the further application of g-C3N4 material in PEC water splitting, such as its wide band gap, low electrical conductivity, high recombination rate of photogenerated electrons/holes, and the difficulty in fabrication of high-quality g-C3N4 films on substrates. In this view, we summarize the novel bottom-up technology …

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Blowing Route Towards Advanced Inorganic Foams, Xuebin Wang, Xiangfen Jiang, Yoshio Bando Jan 2019

Blowing Route Towards Advanced Inorganic Foams, Xuebin Wang, Xiangfen Jiang, Yoshio Bando

Australian Institute for Innovative Materials - Papers

In this account, we review a blowing strategy for manufacturing cellular solid materials. Solid foams have been important engineering materials since the early 20th century, and are newly explored for versatile functionalities in recent decades. The blowing route is a practicable technique to yield foams, compatible with scalable industry. With rising 2D materials, the blowing protocol has been applied to synthesizing foams built of 2D materials or nanosheets for the past several years. It is worthy outlining the fundamentals of foaming processes, which include geometry, statics, kinetics, and dynamics in foaming, to study topological constraint, equilibrium configuration, nucleation-growth, and structural …

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Three-Dimensional Porous Cobalt Phosphide Nanocubes Encapsulated In A Graphene Aerogel As An Advanced Anode With High Coulombic Efficiency For High-Energy Lithium-Ion Batteries, Hong Gao, Fuhua Yang, Yang Zheng, Qing Zhang, Junnan Hao, Shilin Zhang, Hao Zheng, Jun Chen, Hua-Kun Liu, Zaiping Guo Jan 2019

Three-Dimensional Porous Cobalt Phosphide Nanocubes Encapsulated In A Graphene Aerogel As An Advanced Anode With High Coulombic Efficiency For High-Energy Lithium-Ion Batteries, Hong Gao, Fuhua Yang, Yang Zheng, Qing Zhang, Junnan Hao, Shilin Zhang, Hao Zheng, Jun Chen, Hua-Kun Liu, Zaiping Guo

Australian Institute for Innovative Materials - Papers

An ingeniously designed porous structure can synergistically optimize the desired properties and maximize the advantages of a material as an electrode for a high-performance energy storage system. The active material with a porous nanostructure could reduce the ion diffusion path and buffer the strain caused by the volume changes during cycling. Furthermore, combining the active material with a three-dimensional (3D) graphene aerogel (GA) matrix is an ideal way to maintain the structural integrity, improve the conductivity, and overcome the aggregation problem of the nanomaterials. Herein, we adopted a facile template-based strategy to derive a composite of 3D hierarchically porous cobalt …

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Enhanced Superconductivity Induced By Several-Unit-Cells Diffusion In An Fete/Fese Bilayer Heterostructure, Wenbin Qiu, Qingshuang Ma, Zongqing Ma, Jun Tan, Lina Sang, Chuanbing Cai, Md. Shahriar Al Hossain, Zhenxiang Cheng, Xiaolin Wang, Yongchang Liu, Shi Xue Dou Jan 2019

Enhanced Superconductivity Induced By Several-Unit-Cells Diffusion In An Fete/Fese Bilayer Heterostructure, Wenbin Qiu, Qingshuang Ma, Zongqing Ma, Jun Tan, Lina Sang, Chuanbing Cai, Md. Shahriar Al Hossain, Zhenxiang Cheng, Xiaolin Wang, Yongchang Liu, Shi Xue Dou

Australian Institute for Innovative Materials - Papers

Unlike monolayer Fe-Chalcogenide (Fe-Ch)/SrTiO3 (STO), which possesses the potential for high-temperature superconductivity (HTS), a regular Fe-Ch thin film grown on a non-STO substrate by the pulsed laser deposition method shows totally different superconducting behavior and a different mechanism. Although regular Fe-Ch thick films grown on CaF2 generally show the highest superconducting transition temperature (Tc) compared with any other substrates, the disappearance of superconductivity always takes place when the thickness of the Fe-Ch film is reduced to a critical value (∼20nm for Fe-Se and ∼30nm for Fe-Se-Te) with the reason still under debate. Here, we report an enhanced Tc≈17.6K in a …

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Hierarchically Stacked Reduced Graphene Oxide/Carbon Nanotubes For As High Performance Anode For Sodium-Ion Batteries, Jianmin Feng, Lei Dong, Xifei Li, Dejun Li, Pengyi Lu, Feng Hou, Ji Liang, Shi Xue Dou Jan 2019

Hierarchically Stacked Reduced Graphene Oxide/Carbon Nanotubes For As High Performance Anode For Sodium-Ion Batteries, Jianmin Feng, Lei Dong, Xifei Li, Dejun Li, Pengyi Lu, Feng Hou, Ji Liang, Shi Xue Dou

Australian Institute for Innovative Materials - Papers

Sodium has attracted an increasing amount of attention as an alternative element to lithium for energy storage due to its low cost and wide distribution, although the intercalation problem for sodium ions in conventional anode materials, due to their larger ionic size, still has to be overcome in order to utilize this element. Herein, we report a carbon-based hybrid material that is composed of stacked reduced graphene oxide/carbon nanotubes (rGO/CNTs) with a hierarchical and open structure to accommodate Na ions, which was fabricated by a liquid-phase oxidative exfoliation and subsequent reduction. This rGO/CNTs hybrid material features a hierarchical nanostructure with …

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A Direct 3d Suspension Near-Field Electrospinning Technique For The Fabrication Of Polymer Nanoarrays, Alexander Nagle, Cormac Fay, Zhigang Xie, Gordon G. Wallace, Xungai Wang, Michael J. Higgins Jan 2019

A Direct 3d Suspension Near-Field Electrospinning Technique For The Fabrication Of Polymer Nanoarrays, Alexander Nagle, Cormac Fay, Zhigang Xie, Gordon G. Wallace, Xungai Wang, Michael J. Higgins

Australian Institute for Innovative Materials - Papers

Near-field electrospinning (NFES) is widely recognized as a versatile nanofabrication method, one suitable for applications in tissue engineering. Rapid developments in this field have given rise to layered nanofibrous scaffolds. However, this electrostatic fabrication process is limited by the electric field inhibitory effects of polymer deposition. This leads to a major challenge: how to surpass this limitation on planar/layered constructs. While the current focus in this area largely lies with the investigation of new materials, techniques and increasing precision of NFES systems and patterning, exploration of complex collector substrates is often restricted by (i) available technology and (ii) access to …

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Continuous Carbon Nanotube Composite Fibers For Flexible Aqueous Lithium-Ion Batteries, Tao Zhang, Shuaishuai Han, Wenlei Guo, Feng Hou, Jiachen Liu, Xiao Yan, Shunquan Chen, Ji Liang Jan 2019

Continuous Carbon Nanotube Composite Fibers For Flexible Aqueous Lithium-Ion Batteries, Tao Zhang, Shuaishuai Han, Wenlei Guo, Feng Hou, Jiachen Liu, Xiao Yan, Shunquan Chen, Ji Liang

Australian Institute for Innovative Materials - Papers

Continuous composite fibers have been obtained by online modifying the direct-spun carbon nanotube (CNT) fibers with active materials (LiFePO 4 or LiTi 2 PO 4 ) through dipping and twisting. The composite fibers exhibit high specific capacity and good rate performance for an aqueous lithium-ion battery with 1 M Li 2 SO 4 electrolyte, due to the fast electron transport arising from the close contact between the active materials and CNTs. A flexible fiber-shaped aqueous lithium-ion battery fabricated from the composites can deliver a high specific capacity of 29.1 mAh g −1 at a current density of 0.25 A g …

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A Hierarchical Porous Fe-N Impregnated Carbon-Graphene Hybrid For High-Performance Oxygen Reduction Reaction, Sihui Wang, Xiao Yan, Kuang-Hsu Wu, Xuemin Chen, Jianmin Feng, Pengyi Lu, Hou Feng, Hui-Ming Cheng, Ji Liang, Shi Xue Dou Jan 2019

A Hierarchical Porous Fe-N Impregnated Carbon-Graphene Hybrid For High-Performance Oxygen Reduction Reaction, Sihui Wang, Xiao Yan, Kuang-Hsu Wu, Xuemin Chen, Jianmin Feng, Pengyi Lu, Hou Feng, Hui-Ming Cheng, Ji Liang, Shi Xue Dou

Australian Institute for Innovative Materials - Papers

A Fe-N impregnated carbon in a hybrid with in-situ grown graphene from hierarchical porous carbon has been obtained for high-performance oxygen reduction reaction (ORR) catalysis. This hybrid material combines the desirable characteristics for the ORR, including Fe-N active sites, high surface area, good electron conductivity, and hierarchical channels for mass diffusion. As a result, this catalyst exhibits a very positive reaction onset potential ( 0.05 V vs. Ag/AgCl), a high ORR current density, and a complete four-electron ORR pathway, which are even better than a commercial 20% Pt/C catalyst. We further reveal the synergistic ORR enhancement from the controlled Fe-N …

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Engineering The Poly(Vinyl Alcohol)-Polyaniline Colloids For High Performance Waterborne Alkyd Anticorrosion Coating, Rui Guo, Jiao Wang, Haihua Wang, Guiqiang Fei, Caiyun Wang, Liyu Sun, Gordon G. Wallace Jan 2019

Engineering The Poly(Vinyl Alcohol)-Polyaniline Colloids For High Performance Waterborne Alkyd Anticorrosion Coating, Rui Guo, Jiao Wang, Haihua Wang, Guiqiang Fei, Caiyun Wang, Liyu Sun, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

The ecofriendly waterborne alkyd coatings generally compromise the coating performance. Incorporation of polyaniline into alkyd to form nanocomposites can improve the corrosion resistance; however, the uniform distribution of polyaniline (PANI) within the alkyd resin remains a challenge. In this work, PANI is grafted onto epoxy functionalized phosphorylated poly (vinyl alcohol) (PPVA) with different side-chain configurations in order to improve compatibility and dispersion stability. These functionalized PPVA are synthesized using epichlorohydrin (ECIP) or γ-glycidyl methacrylate (GMA) as modifying agents, and respectively labeled as E-PPVA and G-PPVA. G-PPVA/PANI dispersion is stable even at a high PANI loading of 50%, while the maximum …

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Molybdenum And Tungsten Chalcogenides For Lithium/Sodium-Ion Batteries: Beyond Mos2, Junda Huang, Zengxi Wei, Jiaqin Liao, Wei Ni, Caiyun Wang, Jianmin Ma Jan 2019

Molybdenum And Tungsten Chalcogenides For Lithium/Sodium-Ion Batteries: Beyond Mos2, Junda Huang, Zengxi Wei, Jiaqin Liao, Wei Ni, Caiyun Wang, Jianmin Ma

Australian Institute for Innovative Materials - Papers

Molybdenum and tungsten chalcogenides have attracted tremendous attention in energy storage and conversion due to their outstanding physicochemical and electrochemical properties. There are intensive studies on molybdenum and tungsten chalcogenides for energy storage and conversion, however, there is no systematic review on the applications of WS2, MoSe2and WSe2as anode materials for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs), except MoS2. Considering the importance of these contents, it is extremely necessary to overview the recent development of novel layered WS2, MoSe2and WSe2beyond MoS2in energy storage. Here, we will systematically overview the recent progress of WS2, MoSe2and WSe2as anode materials in LIBs …

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Role Of Charge Density Wave In Monatomic Assembly In Transition Metal Dichalcogenides, Haifeng Feng, Zhongfei Xu, Jincheng Zhuang, Li Wang, Yani Liu, Xun Xu, Li Song, Weichang Hao, Yi Du Jan 2019

Role Of Charge Density Wave In Monatomic Assembly In Transition Metal Dichalcogenides, Haifeng Feng, Zhongfei Xu, Jincheng Zhuang, Li Wang, Yani Liu, Xun Xu, Li Song, Weichang Hao, Yi Du

Australian Institute for Innovative Materials - Papers

The charge density wave (CDW) in transition metal dichalcogenides (TMDs) has drawn tremendous interest due to its potential for tailoring their surface electronic and chemical properties. Due to technical challenges, however, how the CDW could modulate the chemical behavior of TMDs is still not clear. Here, this work presents a study of applying the CDW of NbTe 2 , with a high transition temperature above room temperature, to generate the assembling adsorption of Sn adatoms on the surface. It is shown that highly ordered monatomic Sn adatoms with a quasi-1D structure can be obtained under regulation by the single-axis CDW …

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High-Performance Graphene-Fiber-Based Neural Recording Microelectrodes, Kezhong Wang, Christopher Frewin, Dorna Esrafilzadeh, Changchun Yu, Caiyun Wang, Joseph Pancrazio, Mario I. Romero-Ortega, Rouhollah Jalili, Gordon G. Wallace Jan 2019

High-Performance Graphene-Fiber-Based Neural Recording Microelectrodes, Kezhong Wang, Christopher Frewin, Dorna Esrafilzadeh, Changchun Yu, Caiyun Wang, Joseph Pancrazio, Mario I. Romero-Ortega, Rouhollah Jalili, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

Fabrication of flexible and free-standing graphene-fiber- (GF-) based microelectrode arrays with a thin platinum coating, acting as a current collector, results in a structure with low impedance, high surface area, and excellent electrochemical properties. This modification results in a strong synergistic effect between these two constituents leading to a robust and superior hybrid material with better performance than either graphene electrodes or Pt electrodes. The low impedance and porous structure of the GF results in an unrivalled charge injection capacity of 10.34 mC cm −2 with the ability to record and detect neuronal activity. Furthermore, the thin Pt layer transfers …

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Topological Insulator Materials For Advanced Optoelectronic Devices, Zengji Yue, Xiaolin Wang, Min Gu Jan 2019

Topological Insulator Materials For Advanced Optoelectronic Devices, Zengji Yue, Xiaolin Wang, Min Gu

Australian Institute for Innovative Materials - Papers

Topological insulators are quantum materials that have an insulating bulk state and a topologically protected metallic surface state with spin and momentum helical locking and a Dirac-like band structure [1-3]. Two-dimensional (2D) topological insulators are associated with gapless edge states, and three-dimensional (3D) topological insulators with gapless surface states [4]. A variety of compounds have been identified as 2D or 3D topological insulators, including HgTe/CdTe, Bi2Se3, Bi2Te3, Sb2Te3, BiTeCl, Bi1.5Sb0.5Te1.8Se1.2, SmB6 and so on [5-8]. The topological surface (edge) states in these materials have been mainly investigated by first-principle theoretical calculation, electronic transport, angle-resolved photoemission spectroscopy (ARPES), and scanning tunneling …

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Effect Of Monophasic Pulsed Stimulation On Live Single Cell De-Adhesion On Conducting Polymers With Adsorbed Fibronectin As Revealed By Single Cell Force Spectroscopy, Hongrui Zhang, Gordon G. Wallace, Michael J. Higgins Jan 2019

Effect Of Monophasic Pulsed Stimulation On Live Single Cell De-Adhesion On Conducting Polymers With Adsorbed Fibronectin As Revealed By Single Cell Force Spectroscopy, Hongrui Zhang, Gordon G. Wallace, Michael J. Higgins

Australian Institute for Innovative Materials - Papers

The force required to detach a single fibroblast cell in contact with the conducting polymer, polypyrrole doped with dodecylbenzene, was quantified using the Atomic Force Microscope-based technique, Single Cell Force Spectroscopy. The de-adhesion force for a single cell was 0.64 ± 0.03 nN and predominately due to unbinding of α5β1 integrin complexes with surface adsorbed fibronectin, as confirmed by blocking experiments using antibodies. Monophasic pulsed stimulation (50 μs pulse duration) superimposed on either an applied oxidation (+500) or reduction (−500 mV) constant voltage caused a significant decrease in the de-adhesion force by 30%-45% to values ranging from 0.34 to 0.43 …

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Evaluation Of Sterilisation Methods For Bio-Ink Components: Gelatin, Gelatin Methacryloyl, Hyaluronic Acid And Hyaluronic Acid Methacryloyl, Cathal D. O'Connell, Carmine Onofrillo, Serena Duchi, Xin Li, Yifan Zhang, Peilin Tian, Lanyita Lu, Anna Trengove, Anita F. Quigley, Sanjeev Gambhir, Afsaneh Khansari, Tajanka Mladenovska, Andrea O'Connor, Claudia Di Bella, Peter Choong, Gordon G. Wallace Jan 2019

Evaluation Of Sterilisation Methods For Bio-Ink Components: Gelatin, Gelatin Methacryloyl, Hyaluronic Acid And Hyaluronic Acid Methacryloyl, Cathal D. O'Connell, Carmine Onofrillo, Serena Duchi, Xin Li, Yifan Zhang, Peilin Tian, Lanyita Lu, Anna Trengove, Anita F. Quigley, Sanjeev Gambhir, Afsaneh Khansari, Tajanka Mladenovska, Andrea O'Connor, Claudia Di Bella, Peter Choong, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

Reliable and scalable sterilisation of hydrogels is critical to the clinical translation of many biofabrication approaches, such as extrusion-based 3D bioprinting of cell-laden bio-inks. However sterilisation methods can be destructive, and may have detrimental effects on the naturally-derived hydrogels that constitute much of the bio-ink palette. Determining effective sterilisation methods requires detailed analysis of the effects of sterilisation on relevant properties such as viscosity, printability and cytocompatibility. Yet there have been no studies specifically exploring the effects of sterilisation on bio-inks to date. In this work, we explored the effects of various sterilisation techniques on four of the most widely …

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An Efficient Multi-Doping Strategy To Enhance Li-Ion Conductivity In The Garnet-Type Solid Electrolyte Li7la3zr2o12, Yedukondalu Meesala, Yu-Kai Liao, Anirudha Jena, Nai-Hsuan Yang, Wei Kong Pang, Shu-Fen Hu, Ho Chang, Chia-Erh Liu, Shih-Chieh Liao, Jin-Ming Chen, Xiangxin Guo, Ru-Shi Liu Jan 2019

An Efficient Multi-Doping Strategy To Enhance Li-Ion Conductivity In The Garnet-Type Solid Electrolyte Li7la3zr2o12, Yedukondalu Meesala, Yu-Kai Liao, Anirudha Jena, Nai-Hsuan Yang, Wei Kong Pang, Shu-Fen Hu, Ho Chang, Chia-Erh Liu, Shih-Chieh Liao, Jin-Ming Chen, Xiangxin Guo, Ru-Shi Liu

Australian Institute for Innovative Materials - Papers

Lithium-ion (Li + ) batteries suffer from problems caused by the chemical instability of their organic electrolytes. Solid-state electrolytes that exhibit high ionic conductivities and are stable to lithium metal are potential replacements for flammable organic electrolytes. Garnet-type Li 7 La 3 Zr 2 O 12 is a promising solid-state electrolyte for next-generation solid-state Li batteries. In this study, we prepared mono-, dual-, and ternary-doped lithium (Li) garnets by doping tantalum (Ta), tantalum-barium (Ta-Ba), and tantalum-barium-gallium (Ta-Ba-Ga) ions, along with an undoped Li 7 La 3 Zr 2 O 12 (LLZO) cubic garnet electrolyte, using a conventional solid-state reaction method. …

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