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Articles 31 - 60 of 173
Full-Text Articles in Engineering
Coupling Topological Insulator Snsb2te4 Nanodots With Highly Doped Graphene For High-Rate Energy Storage, Zhibin Wu, Gemeng Liang, Wei Kong Pang, Tengfei Zhou, Zhenxiang Cheng, Wenchao Zhang, Ye Liu, Bernt Johannessen, Zaiping Guo
Coupling Topological Insulator Snsb2te4 Nanodots With Highly Doped Graphene For High-Rate Energy Storage, Zhibin Wu, Gemeng Liang, Wei Kong Pang, Tengfei Zhou, Zhenxiang Cheng, Wenchao Zhang, Ye Liu, Bernt Johannessen, Zaiping Guo
Australian Institute for Innovative Materials - Papers
Topological insulators have spurred worldwide interest, but their advantageous properties have scarcely been explored in terms of electrochemical energy storage, and their high-rate capability and long-term cycling stability still remain a significant challenge to harvest. p-Type topological insulator SnSb2Te4 nanodots anchoring on few-layered graphene (SnSb2Te4/G) are synthesized as a stable anode for high-rate lithium-ion batteries and potassium-ion batteries through a ball-milling method. These SnSb2Te4/G composite electrodes show ultralong cycle lifespan (478 mAh g−1 at 1 A g−1 after 1000 cycles) and excellent rate capability (remaining 373 mAh g−1 even at 10 A g−1) in Li-ion storage owing to the rapid …
Metallic State Two-Dimensional Holey-Structured Co3fen Nanosheets As Stable And Bifunctional Electrocatalysts For Zinc–Air Batteries, Haipeng Guo, Xuanwen Gao, Nengfei Yu, Zhi Zheng, Wenbin Luo, Chang Wu, Hua-Kun Liu, Jiazhao Wang
Metallic State Two-Dimensional Holey-Structured Co3fen Nanosheets As Stable And Bifunctional Electrocatalysts For Zinc–Air Batteries, Haipeng Guo, Xuanwen Gao, Nengfei Yu, Zhi Zheng, Wenbin Luo, Chang Wu, Hua-Kun Liu, Jiazhao Wang
Australian Institute for Innovative Materials - Papers
Exploring economically efficient electrocatalysts with robust bifunctional oxygen conversion catalytic activity and designing appropriate structures are essential to realize ideal zinc-Air batteries with high energy density and long lifespan. Two-dimensional metallic state Co3FeN nanosheets with a holey-structured architecture are designed and shown to exhibit enhanced catalytic properties owing to the complete exposure of the atoms in the large lateral surfaces and in the edges of pore areas, together with the lowest OH∗ adsorption energy on exposed surfaces due to bimetallic synergistic effects. Meanwhile, this porous architecture can not only accelerate electron transportation by its metallic state highly oriented crystallized structure, …
Polyaniline Electrochemically Deposited On Tailored Metal Mesh For Dynamically Stretchable Supercapacitors, Fangya Qi, Chen Zhao, Caiyun Wang, Xiaoteng Jia, Li Weng, Tingting He, Yonggang Min
Polyaniline Electrochemically Deposited On Tailored Metal Mesh For Dynamically Stretchable Supercapacitors, Fangya Qi, Chen Zhao, Caiyun Wang, Xiaoteng Jia, Li Weng, Tingting He, Yonggang Min
Australian Institute for Innovative Materials - Papers
© 2019 The Electrochemical Society. As power source for integrated wearable electronics, stretchable supercapacitors have gained significant attention. Here, an in-plane compression strategy is proposed to make highly stretchable current collectors from commercially available stainless steel mesh. Polyaniline is deposited on the compressed metal mesh to produce stretchable pseudo-capacitive electrode with 100% stretching deformation capability. An intrinsically stretchable supercapacitor is demonstrated using such electrodes and poly(vinyl alcohol)H3PO4 polymer gel electrolyte. The assembled supercapacitor shows an areal capacitance of 13.5 mF cm−2 at a current density of 0.1 mA cm−2. It can maintain 89% of its initial capacitance after 1000 stretching/releasing …
Hybrid Graphene/Conducting Polymer Strip Sensors For Sensitive And Selective Electrochemical Detection Of Serotonin, Wed Al-Graiti, Javad Foroughi, Yuqing Liu, Jun Chen
Hybrid Graphene/Conducting Polymer Strip Sensors For Sensitive And Selective Electrochemical Detection Of Serotonin, Wed Al-Graiti, Javad Foroughi, Yuqing Liu, Jun Chen
Australian Institute for Innovative Materials - Papers
© 2019 American Chemical Society. There is an urgent need for electrochemical sensor materials that exhibit electrochemically compliant properties while also retaining high durability under physiological conditions. Herein, we demonstrate a novel strip-style electrochemical sensor using reduced graphene oxide (rGO) and poly(ethylene dioxythiophene)/poly(styrene sulfonic acid) (PEDOT/PSS) nanocomposite films. The fabricated rGO-PEDOT/PSS sensor with and without nafion has shown an effective electrochemical response for both selectivity and sensitivity of the serotonin (5-hydroxytryptamine, 5-HT) neurotransmitter. The developed high-performance hybrid graphene/conducting polymer strip sensors are likely to find applications as chip electrochemical sensor devices for patients diagnosed with Alzheimer's disease.
A Flexible And Boron-Doped Carbon Nanotube Film For High-Performance Li Storage, Lei Wang, Wenlei Guo, Pengyi Lu, Tao Zhang, Feng Hou, Ji Liang
A Flexible And Boron-Doped Carbon Nanotube Film For High-Performance Li Storage, Lei Wang, Wenlei Guo, Pengyi Lu, Tao Zhang, Feng Hou, Ji Liang
Australian Institute for Innovative Materials - Papers
© Copyright © 2019 Wang, Guo, Lu, Zhang, Hou and Liang. Boron-doped carbon nanotubes are a promising candidate for Li storage due to the unique electronic structure and high crystallinity brought by the boron dopants. However, the relatively low Li storage capacity has limited its application in the electrochemical energy storage field, which is mainly caused by the predominantly intact graphitic structure on their surface with limited access points for Li ion entering. Herein, we report a novel B-doped CNTs (py-B-CNTs) film, in which the CNTs possess intrinsically rough surface but flat internal graphitic structure. When used as a flexible …
Layer-Structured Niobium Oxides And Their Analogues For Advanced Hybrid Capacitors, Jiaqin Liao, Wei Ni, Caiyun Wang, Jianmin Ma
Layer-Structured Niobium Oxides And Their Analogues For Advanced Hybrid Capacitors, Jiaqin Liao, Wei Ni, Caiyun Wang, Jianmin Ma
Australian Institute for Innovative Materials - Papers
© 2019 Elsevier B.V. Niobium-based oxides including niobium oxide (Nb2O5) and their analogues with quasi-2D network of open and stable Wadsley-Roth shear crystal structure, have gained great interest for advanced hybrid supercapacitors due to their outstanding rate capability derived from the intercalation pseudocapacitive kinetics. To realize their full potential as battery-type anode electrodes for supercapacitor, various strategies have been effectively implemented to overcome the drawbacks especially the poor intrinsic electrical conductivity, including structure design, surface modification, conductivity enhancement, and electrode engineering. Here, we provide a comprehensive overview of the latest progress of Nb-based oxides for high-rate hybrid supercapacitors in the …
Superparamagnetic Nanoarchitectures For Disease-Specific Biomarker Detection, Mostafa Masud, Jongbeom Na, Muhammad Younus, Md Hossain, Yoshio Bando, Muhammad Shiddiky, Yusuke Yamauchi
Superparamagnetic Nanoarchitectures For Disease-Specific Biomarker Detection, Mostafa Masud, Jongbeom Na, Muhammad Younus, Md Hossain, Yoshio Bando, Muhammad Shiddiky, Yusuke Yamauchi
Australian Institute for Innovative Materials - Papers
© 2019 The Royal Society of Chemistry. The detection of clinically relevant disease-specific biomolecules, including nucleic acids, circulating tumor cells, proteins, antibodies, and extracellular vesicles, has been indispensable to understand their functions in disease diagnosis and prognosis. Therefore, a biosensor for the robust, ultrasensitive, and selective detection of these low-Abundant biomolecules in body fluids (blood, urine, and saliva) is emerging in current clinical research. In recent years, nanomaterials, especially superparamagnetic nanomaterials, have played essential roles in biosensing due to their intrinsic magnetic, electrochemical, and optical properties. However, engineered multicomponent magnetic nanoparticle-based current biosensors that offer the advantages of excellent stability …
Designed Conducting Polymer Composites That Facilitate Long-Lived, Light-Driven Oxygen And Hydrogen Evolution From Water In A Photoelectrochemical Concentration Cell (Pecc), Mohammed Alsultan, Khalid Zainulabdeen, Pawel W. Wagner, Gerhard F. Swiegers, Holly Warren
Designed Conducting Polymer Composites That Facilitate Long-Lived, Light-Driven Oxygen And Hydrogen Evolution From Water In A Photoelectrochemical Concentration Cell (Pecc), Mohammed Alsultan, Khalid Zainulabdeen, Pawel W. Wagner, Gerhard F. Swiegers, Holly Warren
Australian Institute for Innovative Materials - Papers
Light-driven water-splitting to generate hydrogen and oxygen from water is typically carried out in an electrochemical cell with an external voltage greater than 1.23 V applied between the electrodes. In this work, we examined the use of a concentration/chemical bias as a means of facilitating water-splitting under light illumination without the need for such an externally applied voltage. Such a concentration bias was created by employing a pH differential in the liquid electrolytes within the O2-generating anode half-cell and the H2-generating cathode half-cell. A novel, stretchable, highly ion-conductive polyacrylamide CsCl hydrogel was developed to connect the two half-cells. The key …
Exfoliation Of Amorphous Phthalocyanine Conjugated Polymers Into Ultrathin Nanosheets For Highly Efficient Oxygen Reduction, Wenping Liu, Chiming Wang, Lijie Zhang, Houhe Pan, Wenbo Liu, Jun Chen, Dongjiang Yang, Yanjuan Xiang, Kang Wang, Jianzhuang Jiang, Xiangdong Yao
Exfoliation Of Amorphous Phthalocyanine Conjugated Polymers Into Ultrathin Nanosheets For Highly Efficient Oxygen Reduction, Wenping Liu, Chiming Wang, Lijie Zhang, Houhe Pan, Wenbo Liu, Jun Chen, Dongjiang Yang, Yanjuan Xiang, Kang Wang, Jianzhuang Jiang, Xiangdong Yao
Australian Institute for Innovative Materials - Papers
It is a significant challenge to develop a high-efficiency synthetic methodology to access fully conjugated 2D conjugated polymer (CP)/covalent organic framework (COF) nanosheets (NSs) that have great application potential for electronics and energy. Herein, we report the exfoliation of a series of amorphous ethynyl-linked phthalocyanine (Pc) CPs (MPc-CPs, M = Fe, Co, Fe0.5Co0.5) into ultrathin MPc-CP NSs. Random coupling between the four regioisomers (with D4h, D2h, C2v and Cs symmetry) of the two tetra-β-substituted phthalocyanine precursors endows the resulting phthalocyanine conjugated polymers MPc-CPs with intrinsic structural defects and a disordered framework on individual layers. This in turn induces a diminished …
Ionic And Electronic Properties Of The Topological Insulator Bi2te2se Investigated Via Β-Detected Nuclear Magnetic Relaxation And Resonance Of 8li, Ryan M. L. Mcfadden, Aris Chatzichristos, Kim H. Chow, David L. Cortie, Martin H. Dehn, Derek Fujimoto, Masrur D. Hossain, Huiwen Ji, Victoria L. Karner, Robert F. Kiefl, C. D. Philip Levy, Ruohong Li, Iain Mckenzie, Gerald D. Morris, Oren Ofer, Matthew R. Pearson, Monika Stachura, Robert J. Cava, W Andrew Macfarlane
Ionic And Electronic Properties Of The Topological Insulator Bi2te2se Investigated Via Β-Detected Nuclear Magnetic Relaxation And Resonance Of 8li, Ryan M. L. Mcfadden, Aris Chatzichristos, Kim H. Chow, David L. Cortie, Martin H. Dehn, Derek Fujimoto, Masrur D. Hossain, Huiwen Ji, Victoria L. Karner, Robert F. Kiefl, C. D. Philip Levy, Ruohong Li, Iain Mckenzie, Gerald D. Morris, Oren Ofer, Matthew R. Pearson, Monika Stachura, Robert J. Cava, W Andrew Macfarlane
Australian Institute for Innovative Materials - Papers
We report measurements on the high-temperature ionic and low-temperature electronic properties of the three-dimensional topological insulator Bi2Te2Se using ion-implanted 8Liβ-detected nuclear magnetic relaxation and resonance. With implantation energies in the range 5–28keV, the probes penetrate beyond the expected range of the topological surface state, but are still within 250nm of the surface. At temperatures above ∼150K, spin-lattice relaxation measurements reveal isolated 8Li+ diffusion with an activation energy EA=0.185(8)eV and attempt frequency τ−10=8±3×1011s−1 for atomic site-to-site hopping. At lower temperature, we find a linear Korringa-type relaxation mechanism with a field-dependent slope and intercept, which is accompanied by an anomalous field dependence …
New Monatomic Layer Clusters For Advanced Catalysis Materials, Binwei Zhang, Long Ren, Yunxiao Wang, Yi Du, Lei Jiang, Shi Xue Dou
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 …
Cubic Aggregates Of Zn2sno4 Nanoparticles And Their Application In Dye-Sensitized Solar Cells, Kadhim Al-Attafi, Fanar Hussein Jawdat, Hamzeh Qutaish, Patricia Y. Hayes, Amar Al-Keisy, Kyubin Shim, Yusuke Yamauchi, Shi Xue Dou, Andrew Nattestad, Jung Ho Kim
Cubic Aggregates Of Zn2sno4 Nanoparticles And Their Application In Dye-Sensitized Solar Cells, Kadhim Al-Attafi, Fanar Hussein Jawdat, Hamzeh Qutaish, Patricia Y. Hayes, Amar Al-Keisy, Kyubin Shim, Yusuke Yamauchi, Shi Xue Dou, Andrew Nattestad, Jung Ho Kim
Australian Institute for Innovative Materials - Papers
Zinc Tin Oxide (Zn2SnO4 or ZTO) has emerged as an alternate photoanode material for dye-sensitized solar cells (DSCs), as it offers some advantages as compared to Titania (TiO2). In this work, crystalline ZTO nanoparticles, formed into cubic aggregate structures were synthesised by a solvothermal reaction and employed in photoanodes of DSCs, using either a high extinction coefficient organic (D149) or an organometallic (N719) dye. These were investigated in comparison with devices based on TiO2 photoanodes, with DSCs based on ZTO|D149 showing a promising solar-to-electric conversion efficiency of 4.9%, close to that of TiO2|D149. In addition, experiments were performed using ZTO …
High Pressure Synchrotron X-Ray Diffraction Study Of The Mn0.94ti0.06coge Alloy, Precious Shamba, J C. Debnath, Jian Li Wang, Qinfen Gu
High Pressure Synchrotron X-Ray Diffraction Study Of The Mn0.94ti0.06coge Alloy, Precious Shamba, J C. Debnath, Jian Li Wang, Qinfen Gu
Australian Institute for Innovative Materials - Papers
High pressure x-ray diffraction studies up to 10.4 GPa were performed on the Mn0.94Ti0.06CoGe alloy using synchrotron radiation with a diamond anvil cell. No structural phase transitions occurred in the entire range of our measurements. Unit cell parameters were determined up to 10.4 GPa and the calculated unit cell volumes were found to be well represented by a third order Birch-Murnaghan equation of state. The bulk modulus determined from the pressure - volume data was found to be, B0 = 231.72 ± 7.79 GPa. This study, employing high resolution synchrotron x-rays has helped clarify the behaviour of the Mn0.94Ti0.06CoGe alloy …
Engineering Additional Edge Sites On Molybdenum Dichalcogenides Toward Accelerated Alkaline Hydrogen Evolution Kinetics, Qian Zhou, Guoqiang Zhao, Kun Rui, Yaping Chen, Xun Xu, Shi Xue Dou, Wenping Sun
Engineering Additional Edge Sites On Molybdenum Dichalcogenides Toward Accelerated Alkaline Hydrogen Evolution Kinetics, Qian Zhou, Guoqiang Zhao, Kun Rui, Yaping Chen, Xun Xu, Shi Xue Dou, Wenping Sun
Australian Institute for Innovative Materials - Papers
The sluggish reaction kinetics of the hydrogen evolution reaction (HER) in alkaline media is a great obstacle to alkaline water electrolysis, and it remains a great challenge to develop precious metal-free efficient catalysts for the alkaline HER. Transition metal dichalcogenides (TMDs), in particular MoS2 and MoSe2, are promising catalysts for the HER in acidic media, but they exhibit much inferior catalytic activity for the alkaline HER owing to the slow water dissociation process. In this work, we, for the first time, demonstrate that TMD heterostructures with abundant edge sites deliver substantially accelerated alkaline HER kinetics, which is in great part …
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
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 …
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
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 …
Chemical Design Of Palladium-Based Nanoarchitectures For Catalytic Applications, Muhammad Iqbal, Yusuf Valentino Kaneti, Jeonghun Kim, Brian Yuliarto, Yong-Mook Kang, Yoshio Bando, Yoshiyuki Sugahara, Yusuke Yamauchi
Chemical Design Of Palladium-Based Nanoarchitectures For Catalytic Applications, Muhammad Iqbal, Yusuf Valentino Kaneti, Jeonghun Kim, Brian Yuliarto, Yong-Mook Kang, Yoshio Bando, Yoshiyuki Sugahara, Yusuke Yamauchi
Australian Institute for Innovative Materials - Papers
Palladium (Pd) plays an important role in numerous catalytic reactions, such as methanol and ethanol oxidation, oxygen reduction, hydrogenation, coupling reactions, and carbon monoxide oxidation. Creating Pd-based nanoarchitectures with increased active surface sites, higher density of low-coordinated atoms, and maximized surface coverage for the reactants is important. To address the limitations of pure Pd, various Pd-based nanoarchitectures, including alloys, intermetallics, and supported Pd nanomaterials, have been fabricated by combining Pd with other elements with similar or higher catalytic activity for many catalytic reactions. Herein, recent advances in the preparation of Pd-based nanoarchitectures through solution-phase chemical reduction and electrochemical deposition methods …
Long-Life Room-Temperature Sodium-Sulfur Batteries By Virtue Of Transition-Metal-Nanocluster-Sulfur Interactions, Binwei Zhang, Tian Sheng, Yunxiao Wang, Shulei Chou, Kenneth Davey, Shi Xue Dou, Shizhang Qiao
Long-Life Room-Temperature Sodium-Sulfur Batteries By Virtue Of Transition-Metal-Nanocluster-Sulfur Interactions, Binwei Zhang, Tian Sheng, Yunxiao Wang, Shulei Chou, Kenneth Davey, Shi Xue Dou, Shizhang Qiao
Australian Institute for Innovative Materials - Papers
Room‐temperature sodium–sulfur (RT‐Na/S) batteries hold significant promise for large‐scale application because of low cost of both sodium and sulfur. However, the dissolution of polysulfides into the electrolyte limits practical application. Now, the design and testing of a new class of sulfur hosts as transition‐metal (Fe, Cu, and Ni) nanoclusters (ca. 1.2 nm) wreathed on hollow carbon nanospheres (S@M‐HC) for RT‐Na/S batteries is reported. A chemical couple between the metal nanoclusters and sulfur is hypothesized to assist in immobilization of sulfur and to enhance conductivity and activity. S@Fe‐HC exhibited an unprecedented reversible capacity of 394 mAh g−1 despite 1000 cycles …
A Freestanding Cnts Film Fabricated By Pyrrole-Modified Cvd For Capacitive Deionization, Dan Song, Wenlei Guo, Tao Zhang, Pengyi Lu, Anran Guo, Feng Hou, Xiao Yan, Ji Liang
A Freestanding Cnts Film Fabricated By Pyrrole-Modified Cvd For Capacitive Deionization, Dan Song, Wenlei Guo, Tao Zhang, Pengyi Lu, Anran Guo, Feng Hou, Xiao Yan, Ji Liang
Australian Institute for Innovative Materials - Papers
Carbon nanotubes (CNTs) are an excellent electrode material for capacitive deionization (CDI), due to their excellent electronic conductivity and outstanding chemical/physical stability. Their powder form and easy aggregation, however, have greatly limited their practical CDI performance. Aiming to address this issue, the authors report a freestanding CNT film which was fabricated by floating-catalyst chemical vapor deposition, as a binder-free electrode for CDI. By simply adjusting the pyrrole content in the precursor, the morphology of the resulting CNT film can be tuned to meet the requirements of CDI. In the presence of 2 wt.% pyrrole, the CNT film with a mesoporous …
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
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 …
Tunable Solution-Processable Anodic Exfoliated Graphene, Chong Yong Lee, David R. G Mitchell, Paul J. Molino, Adam Fahy, Gordon G. Wallace
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. …
Electrochemical Impacts Of Sheet-Like Hafnium Phosphide And Hafnium Disulfide Catalysts Bonded With Reduced Graphene Oxide Sheets For Bifunctional Oxygen Reactions In Alkaline Electrolytes, Mayilvel Meganathan, Taizhong Huang, Hengyi Fang, Jianfeng Mao, Guoxin Sun
Electrochemical Impacts Of Sheet-Like Hafnium Phosphide And Hafnium Disulfide Catalysts Bonded With Reduced Graphene Oxide Sheets For Bifunctional Oxygen Reactions In Alkaline Electrolytes, Mayilvel Meganathan, Taizhong Huang, Hengyi Fang, Jianfeng Mao, Guoxin Sun
Australian Institute for Innovative Materials - Papers
Non-noble metal-based catalysts with efficient catalytic activities for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are critical for energy conversion devices, including fuel cells and metal–air batteries. In this work, novel hafnium phosphide-reduced graphene oxide nanosheets (HfP-rGO NS) and hafnium disulfide-reduced graphene oxide nanosheets (HfS2-rGO NS) were synthesized and investigated as bifunctional electrocatalysts for OER and ORR. The prepared HfP-rGO NS and HfS2-rGO NS catalysts showed nanosheet structures, where the HfP or HfS2 nanosheet was closely packed with rGO. A unique methodology was adopted to lodge the non-metal oxide catalytic sheets (i.e., HfP and HfS2) over the …
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
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. …
Blowing Route Towards Advanced Inorganic Foams, Xuebin Wang, Xiangfen Jiang, Yoshio Bando
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 …
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
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 …
Two-Dimensional Transition Metal Dichalcogenides In Supercapacitors And Secondary Batteries, Liangxu Lin, Wen Lei, Shaowei Zhang, Yuqing Liu, Gordon G. Wallace, Jun Chen
Two-Dimensional Transition Metal Dichalcogenides In Supercapacitors And Secondary Batteries, Liangxu Lin, Wen Lei, Shaowei Zhang, Yuqing Liu, Gordon G. Wallace, Jun Chen
Australian Institute for Innovative Materials - Papers
Supercapacitors and secondary batteries are indispensable and widely used energy storage components in modern electrical and electronic facilities/devices. However, they both suffer from different technical weaknesses which need to be thoroughly addressed to satisfy the increasing demand for clean energy technologies. For many years efforts to overcome these technical challenges have reached their practical limits, but recent progress on two dimensional (2D) materials, such as thin transition metal dichalcogenides (TMDs), has been considered more encouraging. Owing to their thin and flexible aspects, large electrochemical active surface area (EASA), high surface tunability, rich coordination sites, and both "Faradaic" and "Non-Faradaic" electrochemical …
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
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 …
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
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 …
Effects Of Ipa Treatment On The Photovoltaic Performance Of Bulk Heterojunction Organic Solar Cells, Ali Aghassi, Cormac Fay
Effects Of Ipa Treatment On The Photovoltaic Performance Of Bulk Heterojunction Organic Solar Cells, Ali Aghassi, Cormac Fay
Australian Institute for Innovative Materials - Papers
The treatment of the bulk heterojunction (BHJ) active layer by polar solvents such as alcohols is regarded as a simple, yet effective technique to enhance the power conversion efficiency (PCE) of organic solar cells (OSCs). This study investigated the impact of isopropyl alcohol (IPA) on the photovoltaic performance of two BHJ solar cell devices composed of (a) Poly[N-9′-heptadecanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (PCDTBT) and (b) 7,7′-[4,4-Bis(2-ethylhexyl)-4H-silolo[3,2-b:4,5-b′] dithiophene-2,6-diyl]bis [6-fluoro-4-(5′-hexyl-[2,2′-bithiophen]-5-yl)benzo[c][1,2,5]thiadiazole (p-DTS(FBTTh 2 ) 2 as donors and [6,6]-phenyl-C61-butyric acid methyl ester (PC 60 BM) as the acceptor in both instances. The physical characteristics of the active layers before and after the treatment were established by UV-Vis …
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
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 …