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Articles 91 - 120 of 1524
Full-Text Articles in Physical Sciences and Mathematics
Fully 3d Printed Soft Microactuators For Soft Microrobotics, Manav Tyagi, Geoffrey M. Spinks, Edwin W. Jager
Fully 3d Printed Soft Microactuators For Soft Microrobotics, Manav Tyagi, Geoffrey M. Spinks, Edwin W. Jager
Australian Institute for Innovative Materials - Papers
© 2020 IOP Publishing Ltd. The feasibility of additive manufacturing actuating microstructures and microdevices with small dimension is presented. Using a custom-built extrusion 3D printer and CAD model of the device structure, bilayer microactuators driven by hydrogels are fabricated down to a size of 300 × 1000 μm2, with a minimum thickness of 30 μm. To explore the limitations of the 3D printing process, microactuators with a width of 300 μm and lengths ranging from 1000 to 5000 μm are manufactured and thereafter operated to demonstrate the feasibility of the process. Similarly, microrobotic devices consisting of a passive rigid body …
Tuning Interface Bridging Between Mose2 And Three-Dimensional Carbon Framework By Incorporation Of Moc Intermediate To Boost Lithium Storage Capability, Jing Chen, Yilin Luo, Wenchao Zhang, Yun Qiao, Xinxin Cao, Xuefang Xie, Haoshen Zhou, Anqiang Pan, Shuquan Liang
Tuning Interface Bridging Between Mose2 And Three-Dimensional Carbon Framework By Incorporation Of Moc Intermediate To Boost Lithium Storage Capability, Jing Chen, Yilin Luo, Wenchao Zhang, Yun Qiao, Xinxin Cao, Xuefang Xie, Haoshen Zhou, Anqiang Pan, Shuquan Liang
Australian Institute for Innovative Materials - Papers
© 2020, The Author(s). Highlights: MoSe2/MoC/C multiphase boundaries boost ionic transfer kinetics.MoSe2 (5–10 nm) with rich edge sites is uniformly coated in N-doped framework.The obtained MoSe2 nanodots achieved ultralong cycle performance in LIBs and high capacity retention in full cell. Abstract: Interface engineering has been widely explored to improve the electrochemical performances of composite electrodes, which governs the interface charge transfer, electron transportation, and structural stability. Herein, MoC is incorporated into MoSe2/C composite as an intermediate phase to alter the bridging between MoSe2- and nitrogen-doped three-dimensional (3D) carbon framework as MoSe2/MoC/N–C connection, which greatly improve the structural stability, electronic conductivity, …
Controllable S-Vacancies Of Monolayered Mo–S Nanocrystals For Highly Harvesting Lithium Storage, Linlin Fan, Shulai Lei, Hirbod Kheimeh, Longsheng Zhong, Alibek Kakimov, Jingjing Wang, Jun Chen, Dezheng Liu, Liang Huang, Junhua Hu, Liangxu Lin, Xifei Li
Controllable S-Vacancies Of Monolayered Mo–S Nanocrystals For Highly Harvesting Lithium Storage, Linlin Fan, Shulai Lei, Hirbod Kheimeh, Longsheng Zhong, Alibek Kakimov, Jingjing Wang, Jun Chen, Dezheng Liu, Liang Huang, Junhua Hu, Liangxu Lin, Xifei Li
Australian Institute for Innovative Materials - Papers
© 2020 Elsevier Ltd Two-dimensional (2D) monolayers are promising in electrochemical energy storages (EES), while their performance is still far below than that can be exploited. Understanding 2D monolayers, particularly thin nanocrystals (NCs) with and without surface modifications in EES would be interesting. This work demonstrates how monolayered molybdenum sulfide (Mo–S) NCs with S vacancies perform as a promising anode material to improve many aspects of lithium-ion batteries (LIBs), by utilizing their metallicity, multi-layer adsorption, minimized self-discharge and fast 2D capacitive processes. By way of examples, we demonstrate an increasing trend of the energy capacity and improved lithium diffusion kinetics …
Alkali-Metal Sulfide As Cathodes Toward Safe And High-Capacity Metal (M = Li, Na, K) Sulfur Batteries, Huiling Yang, Binwei Zhang, Yunxiao Wang, Konstantin K. Konstantinov, Hua-Kun Liu, Shi Xue Dou
Alkali-Metal Sulfide As Cathodes Toward Safe And High-Capacity Metal (M = Li, Na, K) Sulfur Batteries, Huiling Yang, Binwei Zhang, Yunxiao Wang, Konstantin K. Konstantinov, Hua-Kun Liu, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
© 2020 Wiley-VCH GmbH Rechargeable alkali-metal–sulfur (M–S) batteries, because of their high energy density and low cost, have been recognized as one of the most promising next-generation energy storage technologies. Nevertheless, the dissolution of metal polysulfides in organic liquid electrolytes and safety issues related to the metal anodes are greatly hindering the development of the M–S batteries. Alkali-metal sulfides (M2Sx) are emerging as cathode materials, which can pair with various safe nonalkali-metal anodes, such as silicon and tin. As a result, the combined M2Sx cathode-based M–S batteries can achieve high capacity as well as safety, thereby providing a more feasible …
Ultrafast Electron Transport In Metallic Antiferromagnetic Mn2au Thin Films Probed By Terahertz Spectroscopy, Zuanming Jin, Shunyi Ruan, Xiaofeng Zhou, Bangju Song, Cheng Song, Xianzhe Chen, Feng Pan, Yan Peng, C Zhang, Guohong Ma, Yiming Zhu, Songlin Zhuang
Ultrafast Electron Transport In Metallic Antiferromagnetic Mn2au Thin Films Probed By Terahertz Spectroscopy, Zuanming Jin, Shunyi Ruan, Xiaofeng Zhou, Bangju Song, Cheng Song, Xianzhe Chen, Feng Pan, Yan Peng, C Zhang, Guohong Ma, Yiming Zhu, Songlin Zhuang
Australian Institute for Innovative Materials - Papers
The ultrafast electron transport is central to the requirement of all-electrically controlled spintronics in metallic collinear antiferromagnetic (AFM) Mn2Au thin films within the terahertz (THz) range. Here we use the THz time-domain spectroscopy to measure the conductivity spectra of Mn2Au thin films with different thicknesses and temperatures. We demonstrate an onset of carrier localization in Mn2Au with decreasing the film thickness from 15 to 5 nm. By using optical pump-THz probe spectroscopy, we found the surface trapping states in the thinnest Mn2Au film limit its photoconductivity significantly. The DC conductivity and scattering time become larger and longer with decreasing temperature …
3d Printed Soft Pneumatic Bending Sensing Chambers For Bilateral And Remote Control Of Soft Robotic Systems, Charbel Tawk, Marc In Het Panhuis, Geoffrey M. Spinks, Gursel Alici
3d Printed Soft Pneumatic Bending Sensing Chambers For Bilateral And Remote Control Of Soft Robotic Systems, Charbel Tawk, Marc In Het Panhuis, Geoffrey M. Spinks, Gursel Alici
Australian Institute for Innovative Materials - Papers
© 2020 IEEE. This work reports on soft pneumatic bending sensing chambers that are directly 3D printed without requiring any support material and postprocessing using a low-cost and open-source fused deposition modeling (FDM) 3D printer and a commercially available soft thermoplastic polyurethane (TPU). These bending sensing chambers have multiple advantages including very fast response to any change in their internal volume, linearity, negligible hysteresis, repeatability, reliability, stability over time, long lifetime and very low power consumption. The performance of these soft sensing chambers is accurately predicted and optimized using finite element modeling (FEM) and a hyperelastic material model for the …
Topographical And Compositional Engineering Of Core-Shell Ni@Pt Orr Electro-Catalysts, Gerard Leteba, David R. G Mitchell, Pieter Levecque, Eric Van Steen, Candace Lang
Topographical And Compositional Engineering Of Core-Shell Ni@Pt Orr Electro-Catalysts, Gerard Leteba, David R. G Mitchell, Pieter Levecque, Eric Van Steen, Candace Lang
Australian Institute for Innovative Materials - Papers
© 2020 The Royal Society of Chemistry. Complex faceted geometries and compositional anisotropy in alloy nanoparticles (NPs) can enhance catalytic performance. We report on the preparation of binary PtNi NPs via a co-thermolytic approach in which we optimize the synthesis variables, which results in significantly improved catalytic performance. We used scanning transmission electron microscopy to characterise the range of morphologies produced, which included spherical and concave cuboidal core-shell structures. Electrocatalytic activity was evaluated using a rotating disc electrode (1600 rpm) in 0.1 M HClO4; the electrocatalytic performance of these Ni@Pt NPs showed significant (∼11-fold) improvement compared to a commercial Pt/C …
Highly Flexible Reduced Graphene Oxide@Polypyrrole-Polyethylene Glycol Foam For Supercapacitors, Chaoyue Cai, Jialong Fu, Chengyan Zhang, Cheng Wang, Rui Sun, Shufang Guo, Fan Zhang, Mingyan Wang, Yuqing Liu, Jun Chen
Highly Flexible Reduced Graphene Oxide@Polypyrrole-Polyethylene Glycol Foam For Supercapacitors, Chaoyue Cai, Jialong Fu, Chengyan Zhang, Cheng Wang, Rui Sun, Shufang Guo, Fan Zhang, Mingyan Wang, Yuqing Liu, Jun Chen
Australian Institute for Innovative Materials - Papers
© 2020 The Royal Society of Chemistry. A flexible and free-standing 3D reduced graphene oxide@polypyrrole-polyethylene glycol (RGO@PPy-PEG) foam was developed for wearable supercapacitors. The device was fabricated sequentially, beginning with the electrodeposition of PPy in the presence of a PEG-borate on a sacrificial Ni foam template, followed by a subsequent GO wrapping and chemical reduction process. The 3D RGO@PPy-PEG foam electrode showed excellent electrochemical properties with a large specific capacitance of 415 F g-1 and excellent long-term stability (96% capacitance retention after 8000 charge-discharge cycles) in a three electrode configuration. An assembled (two-electrode configuration) symmetric supercapacitor using RGO@PPy-PEG electrodes exhibited …
Improved Na Storage And Coulombic Efficiency In Tip2o7@C Microflowers For Sodium Ion Batteries, Jun Pan, Nana Wang, Lili Li, Feng Zhang, Zhenjie Cheng, Yanlu Li, Jian Yang, Yitai Qian
Improved Na Storage And Coulombic Efficiency In Tip2o7@C Microflowers For Sodium Ion Batteries, Jun Pan, Nana Wang, Lili Li, Feng Zhang, Zhenjie Cheng, Yanlu Li, Jian Yang, Yitai Qian
Australian Institute for Innovative Materials - Papers
© 2020, Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature. Ti-based anode materials in sodium ion batteries have attracted extensive interests due to its abundant resources, low toxicity, easy synthesis and long cycle life. However, low Coulombic efficiency and limited specific capacity affect their applications. Here, cubic-phase TiP2O7 is examined as anode materials, using in-situ/ex-situ characterization techniques. It is concluded that the redox reactions of Ti4+/Ti3+ and Ti3+/Ti0 consecutively occur during the discharge/charge processes, both of which are highly reversible. These reactions make the specific capacity of TiP2O7 even higher than the case of TiO2 that only …
Fabrication Of Heterostructured Uio-66-Nh2 /Cnts With Enhanced Activity And Selectivity Over Photocatalytic Co2 Reduction, Xiaojun Wang, Guorui Yang, Guodong Chai, Muhammad Nasir, Silan Wang, Xing Zheng, Caiyun Wang, Wei Yan
Fabrication Of Heterostructured Uio-66-Nh2 /Cnts With Enhanced Activity And Selectivity Over Photocatalytic Co2 Reduction, Xiaojun Wang, Guorui Yang, Guodong Chai, Muhammad Nasir, Silan Wang, Xing Zheng, Caiyun Wang, Wei Yan
Australian Institute for Innovative Materials - Papers
© 2020 Hydrogen Energy Publications LLC Developing photocatalysts with superior efficiency and selectivity is an important issue for photocatalytic converting CO2. Hierarchically heterostructured one-dimensional nanomaterials represent a kind of promising catalysts for photocatalytic CO2 reduction on account of the high surface area and synthetic effect between different components. Herein, we synthesized UIO-66-NH2/carbon nanotubes (CNTs) heterostructures via a hydrothermal method, and investigated their photocatalytic performance. The element mapping, X-ray diffraction, and X-ray photoelectron spectroscopy collectively confirmed that the UIO-66-NH2 was successfully loaded on the surface of the CNTs. The specific surface area of the UIO-66-NH2/CNTs is 1.5 times higher than that …
Highly Ordered Macroporous Dual-Element-Doped Carbon From Metal-Organic Frameworks For Catalyzing Oxygen Reduction, Wei Xia, Michelle Hunter, Jiayu Wang, Guoxun Zhu, Sarah Warren, Yingji Zhao, Yoshio Bando, Debra Searles, Yusuke Yamauchi, Jing Tang
Highly Ordered Macroporous Dual-Element-Doped Carbon From Metal-Organic Frameworks For Catalyzing Oxygen Reduction, Wei Xia, Michelle Hunter, Jiayu Wang, Guoxun Zhu, Sarah Warren, Yingji Zhao, Yoshio Bando, Debra Searles, Yusuke Yamauchi, Jing Tang
Australian Institute for Innovative Materials - Papers
© The Royal Society of Chemistry 2020. Multiple heteroatom-doped carbons with 3D ordered macro/meso-microporous structures have not been realized by simple carbonization of metal-organic frameworks (MOFs). Herein, ordered macroporous phosphorus- and nitrogen-doped carbon (M-PNC) is prepared successfully by carbonization of double-solvent-induced MOF/polystyrene sphere (PS) precursors accompanied with spontaneous removal of the PS template, followed by post-doping. M-PNC shows a high specific surface area of 837 m2g−1, nitrogen doping of 3.17 at%, and phosphorus doping of 1.12 at%. Thanks to the hierarchical structure, high specific surface area, and multiple heteroatom-doping, M-PNC exhibits unusual catalytic activity as an electrocatalyst for the oxygen …
Tunable Magnetic Anisotropy And Dzyaloshinskii-Moriya Interaction In An Ultrathin Van Der Waals Fe3gete2/In2se3 Heterostructure, Dong Chen, Wei Sun, Hang Li, Jian Li Wang, Yuanxu Wang
Tunable Magnetic Anisotropy And Dzyaloshinskii-Moriya Interaction In An Ultrathin Van Der Waals Fe3gete2/In2se3 Heterostructure, Dong Chen, Wei Sun, Hang Li, Jian Li Wang, Yuanxu Wang
Australian Institute for Innovative Materials - Papers
© Copyright © 2020 Chen, Sun, Li, Wang and Wang. The promise of future spintronic devices with nanoscale dimension, high-density, and low-energy consumption motivates the search for van der Waals heterostructure that stabilize topologically protected whirling spin textures such as magnetic skyrmions and domain walls. To translate these compelling features into practical devices, a key challenge lies in achieving effective manipulation of the magnetic anisotropy energy and the Dzyaloshinskii-Moriya (DM) interaction, the two key parameters that determine skyrmions. Through the first-principles calculation, we demonstrate that the polarization-induced broken inversion symmetry in the two-dimensional Fe3GeTe2/In2Se3 multiferroic heterostructure does cause an interfacial …
Lead-Free Antiferroelectric Agnbo3: Phase Transitions And Structure Engineering For Dielectric Energy Storage Applications, Jing Gao, Qiang Li, Shujun Zhang, Jing-Feng Li
Lead-Free Antiferroelectric Agnbo3: Phase Transitions And Structure Engineering For Dielectric Energy Storage Applications, Jing Gao, Qiang Li, Shujun Zhang, Jing-Feng Li
Australian Institute for Innovative Materials - Papers
© 2020 Author(s). The development of electronic materials for storing electrical energy is a thriving research field, where the materials used in batteries, supercapacitors, dielectric capacitors have attracted extensive interest in last decades. The dielectric capacitors showing unique characteristics such as high power density and large charge/discharge rate have been actively studied, where the antiferroelectrics demonstrate great potentials for dielectric energy storage applications by storing and releasing energy upon a reversible electric-field induced antiferroelectric-ferroelectric phase transition. Recently, lead-free antiferroelectric AgNbO3 has emerged as a promising candidate to substitute conventional lead-based antiferroelectrics (such as PbZrO3) in energy storage applications. The phase …
Promoted Photocharge Separation In 2d Lateral Epitaxial Heterostructure For Visible-Light-Driven Co2 Photoreduction, Li Wang, Xue Zhao, Dongdong Lv, Chuangwei Liu, Weihong Lai, Chunyi Sun, Zhongmin Su, Xun Xu, Weichang Hao, Shi Xue Dou, Yi Du
Promoted Photocharge Separation In 2d Lateral Epitaxial Heterostructure For Visible-Light-Driven Co2 Photoreduction, Li Wang, Xue Zhao, Dongdong Lv, Chuangwei Liu, Weihong Lai, Chunyi Sun, Zhongmin Su, Xun Xu, Weichang Hao, Shi Xue Dou, Yi Du
Australian Institute for Innovative Materials - Papers
Photocarrier recombination remains a big barrier for the improvement of solar energy conversion efficiency. For 2D materials, construction of heterostructures represents an efficient strategy to promote photoexcited carrier separation via an internal electric field at the heterointerface. However, due to the difficulty in seeking two components with suitable crystal lattice mismatch, most of the current 2D heterostructures are vertical heterostructures and the exploration of 2D lateral heterostructures is scarce and limited. Here, lateral epitaxial heterostructures of BiOCl @ Bi2O3 at the atomic level are fabricated via sonicating-assisted etching of Cl in BiOCl. This unique lateral heterostructure expedites …
Simple Preparation Of Nitrogen-Doped Tio2 And Its Performance In Selective Oxidation Of Benzyl Alcohol And Benzylamine Under Visible Light, Mattawan Japa, Doldet Tantraviwat, Witchaya Phasayavan, Andrew Nattestad, Jun Chen, Burapat Inceesungvorn
Simple Preparation Of Nitrogen-Doped Tio2 And Its Performance In Selective Oxidation Of Benzyl Alcohol And Benzylamine Under Visible Light, Mattawan Japa, Doldet Tantraviwat, Witchaya Phasayavan, Andrew Nattestad, Jun Chen, Burapat Inceesungvorn
Australian Institute for Innovative Materials - Papers
N-doped TiO2, denoted as T_400, was prepared simply by the facile thermal hydrolysis of TiOSO4 using NH4OH as both a precipitating agent and a nitrogen source. Compared to TiO2 without nitrogen doping, T_400 provides superior photocatalytic activity toward the selective oxidation of benzyl alcohol and benzylamine under visible light irradiation, with > 85 % conversion and > 95 % selectivity to benzaldehyde and N-benzylidenebenzylamine products, respectively. The increased photoactivity of T_400 is ascribed to enhanced visible-light absorption and efficient photogenerated charge transfer and separation as supported by UV–vis DRS, photoelectrochemical and VB-XPS results. The catalyst can …
Nanofibers-Based Piezoelectric Energy Harvester For Self-Powered Wearable Technologies, Fatemeh Mokhtari, Mahnaz Shamshirsaz, Masoud Latifi, Javad Foroughi
Nanofibers-Based Piezoelectric Energy Harvester For Self-Powered Wearable Technologies, Fatemeh Mokhtari, Mahnaz Shamshirsaz, Masoud Latifi, Javad Foroughi
Australian Institute for Innovative Materials - Papers
The demands for wearable technologies continue to grow and novel approaches for powering these devices are being enabled by the advent of new energy materials and novel manufacturing strategies. In addition, decreasing the energy consumption of portable electronic devices has created a huge demand for the development of cost-effective and environment friendly alternate energy sources. Energy harvesting materials including piezoelectric polymer with its special properties make this demand possible. Herein, we develop a flexible and lightweight nanogenerator package based on polyvinyledene fluoride (PVDF)/LiCl electrospun nanofibers. The piezoelectric performance of the developed nanogenator is investigated to evaluate effect of the thickness …
Creating Thin Magnetic Layers At The Surface Of Sb2te3 Topological Insulators Using A Low-Energy Chromium Ion Beam, David L. Cortie, Weiyao Zhao, Zengji Yue, Zhi Li, Abuduliken Bake, Olexandra Marenych, Zeljko Pastuovic, Mitchell John Bromley Nancarrow, Zhaoming Zhang, Dong-Chen Qi, Peter Evans, D Rg Mitchell, Xiaolin Wang
Creating Thin Magnetic Layers At The Surface Of Sb2te3 Topological Insulators Using A Low-Energy Chromium Ion Beam, David L. Cortie, Weiyao Zhao, Zengji Yue, Zhi Li, Abuduliken Bake, Olexandra Marenych, Zeljko Pastuovic, Mitchell John Bromley Nancarrow, Zhaoming Zhang, Dong-Chen Qi, Peter Evans, D Rg Mitchell, Xiaolin Wang
Australian Institute for Innovative Materials - Papers
The surfaces of Sb2Te3 topological insulator crystals were implanted using a 40 keV chromium ion beam. To facilitate uniform doping, the Sb2Te3 was passivated with a thin TiO2 film before the implantation step. The resulting chemical structure was studied using atomic-resolution transmission electron microscopy. A fluence of 7 × 1015 ions/cm2 at 40 keV lead to amorphization of the Sb2Te3 surface, with chromium predominantly incorporated in the amorphous layer. Heating to 200 °C caused the amorphous region to recrystallize and led to the formation of a thin chromium-rich …
Calcined Chicken Eggshell Electrode For Battery And Supercapacitor Applications, Manickam Minakshi, Stephen Higley, Christian Baur, David R. G Mitchell, Robert Jones, Maximilian Fichtner
Calcined Chicken Eggshell Electrode For Battery And Supercapacitor Applications, Manickam Minakshi, Stephen Higley, Christian Baur, David R. G Mitchell, Robert Jones, Maximilian Fichtner
Australian Institute for Innovative Materials - Papers
Biowaste eggshell can be used as a cathode while in its calcined form and it is found to be suitable as an anode in an electrochemical cell. This not only enables energy to be stored reversibly but also achieves waste management and sustainability goals by redirecting material away from landfill. Biowaste eggshell comprises 94% calcium carbonate (CaCO3; calcite), an attractive divalent ion source as a viable option for energy storage. X-ray diffraction and electron microscopy coupled with energy dispersive analyses of the calcined (thermally decomposed) biowaste eggshell show that CaO has been formed and the reaction is topotactic. Field emission …
Tunable Conducting Polymers: Toward Sustainable And Versatile Batteries, Xiaoteng Jia, Yu Ge, Liang Shao, Caiyun Wang, Gordon G. Wallace
Tunable Conducting Polymers: Toward Sustainable And Versatile Batteries, Xiaoteng Jia, Yu Ge, Liang Shao, Caiyun Wang, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Rapid growth of smart electronics and implantable medical devices markets has driven the development of next-generation sustainable, flexible, or implantable batteries. Conducting polymers with unique mechanical and electronic properties offer new possibilities and have attracted great attention. In this review, we discuss approaches used to tune conducting polymers at the molecular level for designated properties and applications such as improved electrochemical performance, and we discuss approaches used to tune conducting polymers at the molecular level to enhance selected properties for applications such as lithium/sodium ion batteries, biodegradable electrodes or enhanced solution processability for advanced manufacture of such structures. We provide …
Computer-Aided Manufacturing And Focused Ion Beam Technology Enable Machining Of Complex Micro- And Nano-Structures, Frank Niessen, Mitchell John Bromley Nancarrow
Computer-Aided Manufacturing And Focused Ion Beam Technology Enable Machining Of Complex Micro- And Nano-Structures, Frank Niessen, Mitchell John Bromley Nancarrow
Australian Institute for Innovative Materials - Papers
We present a novel framework for the fabrication of geometrically complex structures at the micro- and nano-scale which relies on the synergy of integrated computer-aided design and manufacturing systems (CAD/CAM) and focused ion beam (FIB) technology in a scanning electron microscope. Here we utilise industry standard G-code syntax, for the first time, to FIB machining by designing geometries with CAD, defining machining strategies and exporting G-codes with CAM and generating a coordinate list-based beam path by using a custom-built interpreter program. This allows the fabrication of complex structures from CAD models using syntax which is readily understood in the general …
Zn-Doped Cu(100) Facet With Efficient Catalytic Ability For The Co2 Electroreduction To Ethylene, Yuefeng Zhang, Yong Zhao, Caiyun Wang, Zengxi Wei, Junliang Yang, Jianmin Ma
Zn-Doped Cu(100) Facet With Efficient Catalytic Ability For The Co2 Electroreduction To Ethylene, Yuefeng Zhang, Yong Zhao, Caiyun Wang, Zengxi Wei, Junliang Yang, Jianmin Ma
Australian Institute for Innovative Materials - Papers
Electrochemically converting CO2 into fuels and chemicals is an appealing strategy to create energy rich products. The highly demanded product ethylene has been preferably produced on Cu-based catalysts with abundant exposed Cu(100) facets. However, the performance is still limited by the large energy barrier for the C-C dimerization. Here, to lower the energy barrier, we tailor the electronic structure of Cu(100) by doping a series of transition metals using the density functional theory (DFT) method. The zinc-doped Cu(100) surface has shown a superior catalytic performance. Mechanistic study further reveals that doping with Zn alters the electronic structure around Cu, adjusts …
Recent Advances In Isolated Single-Atom Catalysts For Zinc Air Batteries: A Focus Review, Weimin Zhang, Yuqing Liu, Lipeng Zhang, Jun Chen
Recent Advances In Isolated Single-Atom Catalysts For Zinc Air Batteries: A Focus Review, Weimin Zhang, Yuqing Liu, Lipeng Zhang, Jun Chen
Australian Institute for Innovative Materials - Papers
Recently, zinc-air batteries (ZABs) have been receiving attention due to their theoretically high energy density, excellent safety, and the abundance of zinc resources. Typically, the performance of the zinc air batteries is determined by two catalytic reactions on the cathode-the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). Therefore, intensive effort has been devoted to explore high performance electrocatalysts with desired morphology, size, and composition. Among them, single-atom catalysts (SACs) have emerged as attractive and unique systems because of their high electrocatalytic activity, good durability, and 100% active atom utilization. In this review, we mainly focus on the …
Facile Development Of A Fiber-Based Electrode For Highly Selective And Sensitive Detection Of Dopamine, Syamak Farajikhah, Peter C. Innis, Brett Paull, Gordon G. Wallace, Alexander R. Harris
Facile Development Of A Fiber-Based Electrode For Highly Selective And Sensitive Detection Of Dopamine, Syamak Farajikhah, Peter C. Innis, Brett Paull, Gordon G. Wallace, Alexander R. Harris
Australian Institute for Innovative Materials - Papers
A facile one-step method was used to create a selective and sensitive electrode for dopamine (DA) detection based upon a stainless steel (SS) filament substrate and reduced graphene oxide (rGO). The electrode successfully and selectively detects DA in the presence of uric acid and ascorbic acid without the need of a Nafion coating. The proposed electrode is easy to fabricate, low-cost, flexible and strong. The rGO-SS electrode could also be incorporated into a 3-dimensional braided structure enabling DA detection in a two-electrode fibre system. The sensor is an excellent candidate for production of affordable, robust and flexible wearable and portable …
Nickel Sulfide Nanocrystals On Nitrogen-Doped Porous Carbon Nanotubes With High-Efficiency Electrocatalysis For Room-Temperature Sodium-Sulfur Batteries, Zichao Yan, Jin Xiao, Weihong Lai, Li Wang, Florian Arno Gebert, Yunxiao Wang, Qinfen Gu, Hui Liu, Shulei Chou, Hua-Kun Liu, Shi Xue Dou
Nickel Sulfide Nanocrystals On Nitrogen-Doped Porous Carbon Nanotubes With High-Efficiency Electrocatalysis For Room-Temperature Sodium-Sulfur Batteries, Zichao Yan, Jin Xiao, Weihong Lai, Li Wang, Florian Arno Gebert, Yunxiao Wang, Qinfen Gu, Hui Liu, Shulei Chou, Hua-Kun Liu, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
Polysulfide dissolution and slow electrochemical kinetics of conversion reactions lead to low utilization of sulfur cathodes that inhibits further development of room-temperature sodium-sulfur batteries. Here we report a multifunctional sulfur host, NiS2 nanocrystals implanted in nitrogen-doped porous carbon nanotubes, which is rationally designed to achieve high polysulfide immobilization and conversion. Attributable to the synergetic effect of physical confinement and chemical bonding, the high electronic conductivity of the matrix, closed porous structure, and polarized additives of the multifunctional sulfur host effectively immobilize polysulfides. Significantly, the electrocatalytic behaviors of the Lewis base matrix and the NiS2 component are clearly evidenced by operando …
Fluorescent Carbon- And Oxygen-Doped Hexagonal Boron Nitride Powders As Printing Ink For Anticounterfeit Applications, Feng Liu, Andrew Nattestad, Sina Naficy, Rui Han, Gilberto Cosillas, Alexander Angeloski, Xudong Sun, Zhenguo Huang
Fluorescent Carbon- And Oxygen-Doped Hexagonal Boron Nitride Powders As Printing Ink For Anticounterfeit Applications, Feng Liu, Andrew Nattestad, Sina Naficy, Rui Han, Gilberto Cosillas, Alexander Angeloski, Xudong Sun, Zhenguo Huang
Australian Institute for Innovative Materials - Papers
Increasing demands for optical anticounterfeiting technology require the development of versatile luminescent materials with tunable photoluminescence properties. Herein, a number of fluorescent carbon- and oxygen-doped hexagonal boron nitride (denoted as BCNO) phosphors are found to offer a such high-tech anticounterfeiting solution. These multicolor BCNO powders, developed in a two-step process with controlled annealing and oxidation, feature rod-like particle shape, with varied luminescence properties. Studies of the optical properties of BCNO, along with other characterization, provide insight into this underexplored material. Anticounterfeiting applications are demonstrated with printed patterns which are indistinguishable to the naked eye under visible light but become highly …
Designed Patterning Of Mesoporous Metal Films Based On Electrochemical Micelle Assembly Combined With Lithographical Techniques, Hyunsoo Lim, Jeonghun Kim, Kenya Kani, Mostafa Kamal Masud, Hyeongyu Park, Minjun Kim, Saad Alsheri, Tansir Ahamad, Norah Alhokbany, Jongbeom Na, Victor Malgras, Yoshio Bando, Yusuke Yamauchi
Designed Patterning Of Mesoporous Metal Films Based On Electrochemical Micelle Assembly Combined With Lithographical Techniques, Hyunsoo Lim, Jeonghun Kim, Kenya Kani, Mostafa Kamal Masud, Hyeongyu Park, Minjun Kim, Saad Alsheri, Tansir Ahamad, Norah Alhokbany, Jongbeom Na, Victor Malgras, Yoshio Bando, Yusuke Yamauchi
Australian Institute for Innovative Materials - Papers
Mesoporous noble metals and their patterning techniques for obtaining unique patterned structures are highly attractive for electrocatalysis, photocatalysis, and optoelectronics device applications owing to their expedient properties such as high level of exposed active locations, cascade electrocatalytic sites, and large surface area. However, patterning techniques for mesoporous substrates are still limited to metal oxide and silica films, although there is growing demand for developing techniques related to patterning mesoporous metals. In this study, the first demonstration of mesoporous metal films on patterned gold (Au) substrates, prefabricated using photolithographic techniques, is reported. First, different growth rates of mesoporous Au metal films …
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 …
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 …