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Articles 571 - 600 of 1524
Full-Text Articles in Physical Sciences and Mathematics
Understanding Chemically Processed Solar Cells Based On Quantum Dots, Victor Malgras, Andrew Nattestad, Jung Ho Kim, Shi Xue Dou, Yusuke Yamauchi
Understanding Chemically Processed Solar Cells Based On Quantum Dots, Victor Malgras, Andrew Nattestad, Jung Ho Kim, Shi Xue Dou, Yusuke Yamauchi
Australian Institute for Innovative Materials - Papers
Photovoltaic energy conversion is one of the best alternatives to fossil fuel combustion. Petroleum resources are now close to depletion and their combustion is known to be responsible for the release of a considerable amount of greenhouse gases and carcinogenic airborne particles. Novel third-generation solar cells include a vast range of device designs and materials aiming to overcome the factors limiting the current technologies. Among them, quantum dot-based devices showed promising potential both as sensitizers and as colloidal nanoparticle films. A good example is the p-type PbS colloidal quantum dots (CQDs) forming a heterojunction with a n-type wide-band-gap semiconductor such …
Synthesis And Characterisation Of Mwnt/Chitosan And Mwnt/Chitosan-Crosslinked Buckypaper Membranes For Desalination, Ahmed Alshahrani, Habis Al-Zoubi, Long D. Nghiem, Marc In Het Panhuis
Synthesis And Characterisation Of Mwnt/Chitosan And Mwnt/Chitosan-Crosslinked Buckypaper Membranes For Desalination, Ahmed Alshahrani, Habis Al-Zoubi, Long D. Nghiem, Marc In Het Panhuis
Australian Institute for Innovative Materials - Papers
Novel buckypaper (BP) membranes for nanofiltration application were fabricated from multi-walled carbon nanotubes (MWNT) and biopolymer containing quaternary amine groups (chitosan and chitosan-crosslinked by in-situ amine crosslinking). Characteristics of the BP membranes were systematically characterized in terms of mechanical (tensile strengths varied between 49 ± 4 and 59 ± 3 MPa) and electrical properties (60 ± 1 to 70 ± 1 S/cm), contact angle (76 ± 3° to 102 ± 3°), surface morphology, membrane swelling, pore size, surface charge, solubility, water permeability (ranging from 019 ± 0.01 to 0.87 ± 0.03 L m-2 h-1 bar-1), and salts rejection (80-95% for …
Construction Of 2d Lateral Pseudoheterostructures By Strain Engineering, Haifeng Feng, Jincheng Zhuang, Ashley D. Slattery, Liang Wang, Zhongfei Xu, Xun Xu, David R. G Mitchell, Tian Zheng, Songlin Li, Michael J. Higgins, Long Ren, Ziqi Sun, Shi Xue Dou, Yi Du, Weichang Hao
Construction Of 2d Lateral Pseudoheterostructures By Strain Engineering, Haifeng Feng, Jincheng Zhuang, Ashley D. Slattery, Liang Wang, Zhongfei Xu, Xun Xu, David R. G Mitchell, Tian Zheng, Songlin Li, Michael J. Higgins, Long Ren, Ziqi Sun, Shi Xue Dou, Yi Du, Weichang Hao
Australian Institute for Innovative Materials - Papers
Two-dimensional (2D) lateral heterostructures host unconventional physical properties due to their controllable band-offset tuning and interfacial sensitive characteristic. The lattice mismatch results in the difficulties to construct the perfect atomic interface in such 2D lateral heterostructures, which in turn limits their desirable properties and performances in applications. In this work, strain-modulated 2D lateral pseudoheterogeneous structures are designed and realized in the singlecomponent 2D BiOBr nanosheets by taking advantage of their strain-sensitive crystal and electronic structures. The pseudoheterogeneous interface without atomic mismatch can be feasibly modulated by local strain distribution, which exhibits similar local electronic band structure of corresponding heterostructures. Significant …
Hierarchical Porous Carbons With Layer-By-Layer Motif Architectures From Confined Soft-Template Self-Assembly In Layered Materials, Jie Wang, Jing Tang, Bing Ding, Victor Malgras, Zhi Chang, Xiaodong Hao, Ya Wang, Hui Dou, Xiaogang Zhang, Yusuke Yamauchi
Hierarchical Porous Carbons With Layer-By-Layer Motif Architectures From Confined Soft-Template Self-Assembly In Layered Materials, Jie Wang, Jing Tang, Bing Ding, Victor Malgras, Zhi Chang, Xiaodong Hao, Ya Wang, Hui Dou, Xiaogang Zhang, Yusuke Yamauchi
Australian Institute for Innovative Materials - Papers
Although various two-dimensional (2D) nanomaterials have been explored as promising capacitive materials due to their unique layered structure, their natural restacking tendency impedes electrolyte transport and significantly restricts their practical applications. Herein, we synthesize all-carbon layer-by-layer motif architectures by introducing 2D ordered mesoporous carbons (OMC) within the interlayer space of 2D nanomaterials. As a proof of concept, MXenes are selected as 2D hosts to design 2D-2D heterostructures. Further removing the metal elements from MXenes leads to the formation of all-carbon 2D-2D heterostructures consisting of alternating layers of MXene-derived carbon (MDC) and OMC. The OMC layers intercalated with the MDC layers …
Quantification Of Gene-Specific Dna Methylation In Oesophageal Cancer Via Electrochemistry, Md Hakimul Haque, Vinod Gopalan, Md Nazmul Islam, Mostafa Kamal Masud, Ripon Bhattacharjee, Md. Shahriar Al Hossain, Nam-Trung Nguyen, Alfred K. Lam, Muhammad J. A Shiddiky
Quantification Of Gene-Specific Dna Methylation In Oesophageal Cancer Via Electrochemistry, Md Hakimul Haque, Vinod Gopalan, Md Nazmul Islam, Mostafa Kamal Masud, Ripon Bhattacharjee, Md. Shahriar Al Hossain, Nam-Trung Nguyen, Alfred K. Lam, Muhammad J. A Shiddiky
Australian Institute for Innovative Materials - Papers
No abstract provided.
High-Performance Hydrogen Storage Nanoparticles Inside Hierarchical Porous Carbon Nanofibers With Stable Cycling, Guanglin Xia, Xiaowei Chen, Yan Zhao, Xingguo Li, Zaiping Guo, Craig Jensen, Qinfen Gu, Xuebin Yu
High-Performance Hydrogen Storage Nanoparticles Inside Hierarchical Porous Carbon Nanofibers With Stable Cycling, Guanglin Xia, Xiaowei Chen, Yan Zhao, Xingguo Li, Zaiping Guo, Craig Jensen, Qinfen Gu, Xuebin Yu
Australian Institute for Innovative Materials - Papers
An effective route based on space-confined chemical reaction to synthesize uniform Li2Mg(NH)2 nanoparticles is reported. The hierarchical pores inside the one-dimensional carbon nanofibers (CNFs), induced by the creation of well-dispersed Li3N, serve as intelligent nanoreactors for the reaction of Li3N with Mg-containing precursors, resulting in the formation of uniformly discrete Li2Mg(NH)2 nanoparticles. The nanostructured Li2Mg(NH)2 particles inside the CNFs are capable of complete hydrogenation and dehydrogenation at a temperature as low as 105 °C with the suppression of ammonia release. Furthermore, by virtue of the nanosize effects and space-confinement by the porous carbon scaffold, no degradation was observed after 50 …
Cellulose- Based Magnetoelectric Composites, Yan Zong, Tian Zheng, Pedro Martins, Senentxu Lanceros-Mendez, Zhilian Yue, Michael J. Higgins
Cellulose- Based Magnetoelectric Composites, Yan Zong, Tian Zheng, Pedro Martins, Senentxu Lanceros-Mendez, Zhilian Yue, Michael J. Higgins
Australian Institute for Innovative Materials - Papers
Since the first magnetoelectric polymer composites were fabricated more than a decade ago, there has been a reluctance to use piezoelectric polymers other than poly(vinylidene fluoride) and its copolymers due to their well-defined piezoelectric mechanism and high piezoelectric coefficients that lead to superior magnetoelectric coefficients of >1 V cm−1 Oe−1 . This is the current situation despite the potential for other piezoelectric polymers, such as natural biopolymers, to bring unique, added-value properties and functions to magnetoelectric composite devices. Here we demonstrate a cellulose-based magnetoelectric laminate composite that produces considerable magnetoelectric coefficients of ≈1.5 V cm−1 Oe−1 , comprising a Fano …
System And Process Development For Coaxial Extrusion In Fused Deposition Modelling, Adam Taylor, Stephen T. Beirne, Gursel Alici, Gordon G. Wallace
System And Process Development For Coaxial Extrusion In Fused Deposition Modelling, Adam Taylor, Stephen T. Beirne, Gursel Alici, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Purpose: This paper aims to design and test a system capable of coaxial fused deposition modelling (FDM) and assess the coaxial fibres produced for their coaxial concentricity. The goal is to achieve concentricity values below the literature standard of 15 per cent. Design/methodology/approach: This research discusses the design of the coaxial nozzle internal geometry and validates the modelling process by using computational fluid dynamics to assess its flow profile. Sequentially, this paper discusses the abilities of current additive manufacturing (AM) technology in the production of the coaxial nozzle. Findings: The methodology followed has produced coaxial fibres with concentricity values as …
All-Optical Observation And Reconstruction Of Spin Wave Dispersion, Yusuke Hashimoto, Shunsuke Daimon, Ryo Iguchi, Yasuyuki Oikawa, Ka Shen, Koji Sato, Davide Bossini, Yutaka Tabuchi, Takuya Satoh, Burkard Hillebrands, Gerrit E. W Bauer, Tom H. Johansen, Andrei Kirilyuk, Theo Rasing, Eiji Saitoh
All-Optical Observation And Reconstruction Of Spin Wave Dispersion, Yusuke Hashimoto, Shunsuke Daimon, Ryo Iguchi, Yasuyuki Oikawa, Ka Shen, Koji Sato, Davide Bossini, Yutaka Tabuchi, Takuya Satoh, Burkard Hillebrands, Gerrit E. W Bauer, Tom H. Johansen, Andrei Kirilyuk, Theo Rasing, Eiji Saitoh
Australian Institute for Innovative Materials - Papers
To know the properties of a particle or a wave, one should measure how its energy changes with its momentum. The relation between them is called the dispersion relation, which encodes essential information of the kinetics. In a magnet, the wave motion of atomic spins serves as an elementary excitation, called a spin wave, and behaves like a fictitious particle. Although the dispersion relation of spin waves governs many of the magnetic properties, observation of their entire dispersion is one of the challenges today. Spin waves whose dispersion is dominated by magnetostatic interaction are called pure-magnetostatic waves, which are still …
3d Network Of Cellulose-Based Energy Storage Devices And Related Emerging Applications, Saikat Dutta, Jeonghun Kim, Yusuke Ide, Jung Ho Kim, Md. Shahriar Al Hossain, Yoshio Bando, Yusuke Yamauchi, Kevin C.-W Wu
3d Network Of Cellulose-Based Energy Storage Devices And Related Emerging Applications, Saikat Dutta, Jeonghun Kim, Yusuke Ide, Jung Ho Kim, Md. Shahriar Al Hossain, Yoshio Bando, Yusuke Yamauchi, Kevin C.-W Wu
Australian Institute for Innovative Materials - Papers
There has recently been a major thrust toward advanced research in the area of hierarchical carbon nanostructured electrodes derived from cellulosic resources, such as cellulose nanofibers (CNFs), which are accessible from natural cellulose and bacterial cellulose (BC). This research is providing a firm scientific basis for recognizing the inherent mechanical and electrochemical properties of those composite carbon materials that are suitable for carbon-electrode applications, where they represent obvious alternatives to replace the current monopoly of carbon materials (carbon nanotubes, reduced graphene oxide, and their derivatives). Significant promising developments in this area are strengthened by the one dimensional (1D) nanostructures and …
Voltammetric Enhancement Of Li-Ion Conduction In Al-Doped Li7-Xla3zr2o12 Solid Electrolyte, Yu-Ting Chen, Anirudha Jena, Wei Kong Pang, Vanessa K. Peterson, Hwo-Shuenn Sheu, Ho Chang, Ru-Shi Liu
Voltammetric Enhancement Of Li-Ion Conduction In Al-Doped Li7-Xla3zr2o12 Solid Electrolyte, Yu-Ting Chen, Anirudha Jena, Wei Kong Pang, Vanessa K. Peterson, Hwo-Shuenn Sheu, Ho Chang, Ru-Shi Liu
Australian Institute for Innovative Materials - Papers
2017 American Chemical Society. Al-doped Li 7-x La 3 Zr 2 O 12 is found to be more ionically conductive following voltammetric treatment in an all-solid-state Li|Li 7-x La 3 Zr 2 O 12 |Li cell configuration. This result is consistent with electrical impedance spectroscopy measurements, which reveal that the activation energy for lithium diffusion is reduced from 0.32 to 0.26 eV following voltammetric treatment. The Li deposition-dissolution signal has been observed in the voltammograms, and neutron powder diffraction shows an increase in the lithium content of the Li 7-x La 3 Zr 2 O 12 . Furthermore, X-ray photoelectron …
Microstructure Refinement In W-Y2o3 Alloy Fabricated By Wet Chemical Method With Surfactant Addition And Subsequent Spark Plasma Sintering, Zhi Dong, Nan Liu, Zongqing Ma, Chenxi Liu, Qianying Guo, Zeid Abdullah Alothman, Yusuke Yamauchi, Md. Shahriar Al Hossain, Yongchang Liu
Microstructure Refinement In W-Y2o3 Alloy Fabricated By Wet Chemical Method With Surfactant Addition And Subsequent Spark Plasma Sintering, Zhi Dong, Nan Liu, Zongqing Ma, Chenxi Liu, Qianying Guo, Zeid Abdullah Alothman, Yusuke Yamauchi, Md. Shahriar Al Hossain, Yongchang Liu
Australian Institute for Innovative Materials - Papers
With the aim of preparing high performance oxide-dispersion-strengthened tungsten based alloys by powder metallurgy, the W-Y 2 O 3 composite nanopowder precursor was fabricated by an improved wet chemical method with anion surfactant sodium dodecyl sulfate (SDS) addition. It is found that the employment of SDS can dramatically decrease W grain size (about 40 nm) and improve the size uniformity. What's more, SDS addition can also remarkably improve the uniform dispersion of Y 2 O 3 particles during the synthesis process. For the alloy whose powder precursor was fabricated by traditional wet chemical method without SDS addition, only a few …
Handheld Co-Axial Bioprinting: Application To In Situ Surgical Cartilage Repair, Serena Duchi, Carmine Onofrillo, Cathal D. O'Connell, Romane Blanchard, Cheryl Augustine, Anita F. Quigley, Robert M. I Kapsa, Peter Pivonka, Gordon G. Wallace, Claudia Di Bella, Peter F. M Choong
Handheld Co-Axial Bioprinting: Application To In Situ Surgical Cartilage Repair, Serena Duchi, Carmine Onofrillo, Cathal D. O'Connell, Romane Blanchard, Cheryl Augustine, Anita F. Quigley, Robert M. I Kapsa, Peter Pivonka, Gordon G. Wallace, Claudia Di Bella, Peter F. M Choong
Australian Institute for Innovative Materials - Papers
Three-dimensional (3D) bioprinting is driving major innovations in the area of cartilage tissue engineering. Extrusion-based 3D bioprinting necessitates a phase change from a liquid bioink to a semi-solid crosslinked network achieved by a photo-initiated free radical polymerization reaction that is known to be cytotoxic. Therefore, the choice of the photocuring conditions has to be carefully addressed to generate a structure stiff enough to withstand the forces phisiologically applied on articular cartilage, while ensuring adequate cell survival for functional chondral repair. We recently developed a handheld 3D printer called "Biopen". To progress towards translating this freeform biofabrication tool into clinical practice, …
Thermomechanical Effects In The Torsional Actuation Of Twisted Nylon 6 Fiber, Shazed Aziz, Sina Naficy, Javad Foroughi, Hugh Ralph Brown, Geoffrey M. Spinks
Thermomechanical Effects In The Torsional Actuation Of Twisted Nylon 6 Fiber, Shazed Aziz, Sina Naficy, Javad Foroughi, Hugh Ralph Brown, Geoffrey M. Spinks
Australian Institute for Innovative Materials - Papers
Thermally induced torsional and tensile actuators based on twisted polymeric fibers have opened new opportunities for the application of artificial muscles. These newly developed actuators show significant torsional deformations when subjected to temperature changes, and this torsional actuation is the defining mechanism for tensile actuation of twisted and coiled fibers. To date it has been found that these actuators require multiple heat/cool cycles (referred to as "training" cycles) prior to obtaining a fully reversible actuation response. Herein, the effect of annealing conditions applied to twisted nylon 6 monofilament is investigated and it is shown that annealing at 200°C eliminates the …
Chevrel Phase Mo6t8 (T = S, Se) As Electrodes For Advanced Energy Storage, Lin Mei, Jiantie Xu, Zengxi Wei, Hua-Kun Liu, Yutao Li, Jianmin Ma, Shi Xue Dou
Chevrel Phase Mo6t8 (T = S, Se) As Electrodes For Advanced Energy Storage, Lin Mei, Jiantie Xu, Zengxi Wei, Hua-Kun Liu, Yutao Li, Jianmin Ma, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
With the large-scale applications of electric vehicles in recent years, future batteries are required to be higher in power and possess higher energy densities, be more environmental friendly, and have longer cycling life, lower cost, and greater safety than current batteries. Therefore, to develop alternative electrode materials for advanced batteries is an important research direction. Recently, the Chevrel phase Mo 6 T 8 (T = S, Se) has attracted increasing attention as electrode candidate for advanced batteries, including monovalent (e.g., lithium and sodium) and multivalent (e.g., magnesium, zinc and aluminum) ion batteries. Benefiting from its unique open crystal structure, the …
Flexible Polycaprolactone (Pcl) Supercapacitor Based On Reduced Graphene Oxide (Rgo)/Single-Wall Carbon Nanotubes (Swnts) Composite Electrodes, Hyeon Taek Jeong, Yong-Ryeol Kim, Byung Chul Kim
Flexible Polycaprolactone (Pcl) Supercapacitor Based On Reduced Graphene Oxide (Rgo)/Single-Wall Carbon Nanotubes (Swnts) Composite Electrodes, Hyeon Taek Jeong, Yong-Ryeol Kim, Byung Chul Kim
Australian Institute for Innovative Materials - Papers
The reduced graphene oxide (rGO)/single-wall carbon nanotubes (SWNTs) composites are coated onto the polycaprolactone (PCL) substrate via spray coating technique to prepare a flexible supercapacitor. The electrochemical properties of the flexible PCL supercapacitor as a function of bending cycles and angles are evaluated using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge/discharge tests. The EIS and charge/discharge curves of the flexible PCL supercapacitor exhibit capacitive behavior even after prolonged bending cycles up to 500. The highest capacitance value of the unbent PCL supercapacitor is 52.5 F g-1 which retained 65% after 500 bending with 6000th galvanostatic charge/discharge cycles.
Research Update: Hybrid Energy Devices Combining Nanogenerators And Energy Storage Systems For Self-Charging Capability, Jeonghun Kim, Ju-Hyuck Lee, Jaewoo Lee, Yusuke Yamauchi, Chang-Ho Choi, Jung Ho Kim
Research Update: Hybrid Energy Devices Combining Nanogenerators And Energy Storage Systems For Self-Charging Capability, Jeonghun Kim, Ju-Hyuck Lee, Jaewoo Lee, Yusuke Yamauchi, Chang-Ho Choi, Jung Ho Kim
Australian Institute for Innovative Materials - Papers
The past decade has been especially creative for nanogenerators as energy harvesting devices utilizing both piezoelectric and triboelectric properties. Most recently, self-charging power units using both nanogenerators and energy storage systems have begun to be investigated for portable and wearable electronics to be used in our daily lives. This review focuses on these hybrid devices with self-charging combined with energy harvesting storage systems based on the most recent reports. In this research update, we will describe the materials, device structures, integration, applications, and research progress up to the present on hybrid devices.
Capillary-Induced Ge Uniformly Distributed In N-Doped Carbon Nanotubes With Enhanced Li-Storage Performance, Haipeng Guo, Boyang Ruan, Lili Liu, Lei Zhang, Zhanliang Tao, Shulei Chou, Jiazhao Wang, Hua-Kun Liu
Capillary-Induced Ge Uniformly Distributed In N-Doped Carbon Nanotubes With Enhanced Li-Storage Performance, Haipeng Guo, Boyang Ruan, Lili Liu, Lei Zhang, Zhanliang Tao, Shulei Chou, Jiazhao Wang, Hua-Kun Liu
Australian Institute for Innovative Materials - Papers
Germanium (Ge) is a prospective anode material for lithium-ion batteries, as it possesses large theoretical capacity, outstanding lithium-ion diffusivity, and excellent electrical conductivity. Ge suffers from drastic capacity decay and poor rate performance, however, owing to its low electrical conductivity and huge volume expansion during cycling processes. Herein, a novel strategy has been developed to synthesize a Ge at N-doped carbon nanotubes (Ge at N-CNTs) composite with Ge nanoparticles uniformly distributed in the N-CNTs by using capillary action. This unique structure could effectively buffer large volume expansion. When evaluated as an anode material, the Ge at N-CNTs demonstrate enhanced cycling …
Structure-Property Relationships Of Organic Electrolytes And Their Effects On Li/S Battery Performance, Mohammad Kaiser, Shulei Chou, Hua-Kun Liu, Shi Xue Dou, Chunsheng Wang, Jiazhao Wang
Structure-Property Relationships Of Organic Electrolytes And Their Effects On Li/S Battery Performance, Mohammad Kaiser, Shulei Chou, Hua-Kun Liu, Shi Xue Dou, Chunsheng Wang, Jiazhao Wang
Australian Institute for Innovative Materials - Papers
Electrolytes, which are a key component in electrochemical devices, transport ions between the sulfur/carbon composite cathode and the lithium anode in lithium-sulfur batteries (LSBs). The performance of a LSB mostly depends on the electrolyte due to the dissolution of polysulfides into the electrolyte, along with the formation of a solid-electrolyte interphase. The selection of the electrolyte and its functionality during charging and discharging is intricate and involves multiple reactions and processes. The selection of the proper electrolyte, including solvents and salts, for LSBs strongly depends on its physical and chemical properties, which is heavily controlled by its molecular structure. In …
Recent Progress In Graphite Intercalation Compounds For Rechargeable Metal (Li, Na, K, Al)-Ion Batteries, Jiantie Xu, Yuhai Dou, Zengxi Wei, Jianmin Ma, Yonghong Deng, Yutao Li, Hua-Kun Liu, Shi Xue Dou
Recent Progress In Graphite Intercalation Compounds For Rechargeable Metal (Li, Na, K, Al)-Ion Batteries, Jiantie Xu, Yuhai Dou, Zengxi Wei, Jianmin Ma, Yonghong Deng, Yutao Li, Hua-Kun Liu, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
Lithium-ion batteries (LIBs) with higher energy density are very necessary to meet the increasing demand for devices with better performance. With the commercial success of lithiated graphite, other graphite intercalation compounds (GICs) have also been intensively reported, not only for LIBs, but also for other metal (Na, K, Al) ion batteries. In this Progress Report, we briefly review the application of GICs as anodes and cathodes in metal (Li, Na, K, Al) ion batteries. After a brief introduction on the development history of GICs, the electrochemistry of cationic GICs and anionic GICs is summarized. We further briefly summarize the use …
A 3d Hierarchical Porous Co3o4 Nanotube Network As An Efficient Cathode For Rechargeable Lithium-Oxygen Batteries, Lili Liu, Haipeng Guo, Yuyang Hou, Jun Wang, Lijun Fu, Jun Chen, Hua-Kun Liu, Jiazhao Wang, Yu-Ping Wu
A 3d Hierarchical Porous Co3o4 Nanotube Network As An Efficient Cathode For Rechargeable Lithium-Oxygen Batteries, Lili Liu, Haipeng Guo, Yuyang Hou, Jun Wang, Lijun Fu, Jun Chen, Hua-Kun Liu, Jiazhao Wang, Yu-Ping Wu
Australian Institute for Innovative Materials - Papers
Herein, a three-dimensional (3D) hierarchical porous Co 3 O 4 nanotube (Co 3 O 4 HPNT) network was prepared using a polypyrrole nanofiber (PPyNF) as a sacrificial template. When employed as a cathode for lithium-oxygen batteries, the 3D Co 3 O 4 HPNT network demonstrated superior bifunctional electrocatalytic activities towards both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER), with a relatively low charge overpotential of 99 mV and a high discharge/charge capacity of 4164/4299 mA h g -1 . High-resolution scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy measurements on Co 3 O 4 HPNT-based …
Same Titanium Glycolate Precursor But Different Products: Successful Synthesis Of Twinned Anatase Tio2 Nanocrystals With Excellent Solar Photocatalytic Hydrogen Evolution Capability, Gang Cheng, Yi Wei, Jinyan Xiong, Yixin Gan, Jiaxin Zhu, Feifan Xu
Same Titanium Glycolate Precursor But Different Products: Successful Synthesis Of Twinned Anatase Tio2 Nanocrystals With Excellent Solar Photocatalytic Hydrogen Evolution Capability, Gang Cheng, Yi Wei, Jinyan Xiong, Yixin Gan, Jiaxin Zhu, Feifan Xu
Australian Institute for Innovative Materials - Papers
Exploiting a synthesis protocol to tailor TiO 2 with a unique morphology and crystal phase has received considerable interest in the energy and environmental fields. We here describe the use of a titanium glycolate precursor in a hydrothermal hydrolysis reaction to engineer TiO 2 nanocrystals with different crystal phases and structures. Anatase TiO 2 nanocrystals with twinned structures were obtained by using a lower amount of NaOH in the hydrolysis system, while brookite TiO 2 nanocrystals were formed when higher amounts of NaOH were employed. The as-synthesized different TiO 2 nanocrystals have a suitable bandgap to harvest photons and a …
Light-Triggered Soft Artificial Muscles: Molecular-Level Amplification Of Actuation Control Signals, Michael Dicker, Anna B. Baker, Robert Iredale, Sina Naficy, Ian Bond, Charl Faul, Jonathan Rossiter, Geoffrey M. Spinks, Paul Weaver
Light-Triggered Soft Artificial Muscles: Molecular-Level Amplification Of Actuation Control Signals, Michael Dicker, Anna B. Baker, Robert Iredale, Sina Naficy, Ian Bond, Charl Faul, Jonathan Rossiter, Geoffrey M. Spinks, Paul Weaver
Australian Institute for Innovative Materials - Papers
The principle of control signal amplification is found in all actuation systems, from engineered devices through to the operation of biological muscles. However, current engineering approaches require the use of hard and bulky external switches or valves, incompatible with both the properties of emerging soft artificial muscle technology and those of the bioinspired robotic systems they enable. To address this deficiency a biomimetic molecular-level approach is developed that employs light, with its excellent spatial and temporal control properties, to actuate soft, pH-responsive hydrogel artificial muscles. Although this actuation is triggered by light, it is largely powered by the resulting excitation …
Correlation Of Impedance And Effective Electrode Area Of Iridium Oxide Neural Electrodes, Alexander R. Harris, Antonio G. Paolini
Correlation Of Impedance And Effective Electrode Area Of Iridium Oxide Neural Electrodes, Alexander R. Harris, Antonio G. Paolini
Australian Institute for Innovative Materials - Papers
Iridium oxide is routinely used for bionic applications owing to its high charge injection capacity. The electrode impedance at 1 kHz is typically reported to predict neural recording performance. In this article, the impedance of activated iridium oxide films (AIROFs) has been examined. The impedance of unactivated iridium electrodes was half that of platinum electrodes of similar geometry, indicating some iridium oxide was present on the electrode surface. A two time constant equivalent circuit was used to model the impedance of activated iridium. The impedance at low and intermediate frequencies decreased with increasing number of activation pulses and total activation …
Electrochemical Oxidation Of W(Co)4(Ll): Generation, Characterization, And Reactivity Of [W(Co)4(Ll)]+ (Ll≤Α-Diimine Ligands), John P. Bullock, Chong Yong Lee, Brian Hagan, Humair Madhani, John Ulrich
Electrochemical Oxidation Of W(Co)4(Ll): Generation, Characterization, And Reactivity Of [W(Co)4(Ll)]+ (Ll≤Α-Diimine Ligands), John P. Bullock, Chong Yong Lee, Brian Hagan, Humair Madhani, John Ulrich
Australian Institute for Innovative Materials - Papers
The electrochemistry of a series of W(CO)4(LL) complexes, where LL is an aromatic α-diimine ligand, was examined in coordinating and weakly coordinating media using several techniques. These compounds undergo metal-centred one-electron oxidations and the electrogenerated radical cations undergo a range of subsequent chemical steps, the nature of which depends on the substituents of the α-diimine ligand and the presence of coordinating species. In CH2Cl2/TBAPF6, where TBAPF6 is n-tetrabutylammonium hexaflurophosphate, the bulk oxidations are partially reversible at scan rates of 0.25Vs-1; the resulting tungsten(i) radicals react via disproportionation and loss of carbonyl, the rate constants for which were measured by double-potential …
Aggregated Mesoporous Nanoparticles For High Surface Area Light Scattering Layer Tio2 Photoanodes In Dye-Sensitized Solar Cells, Kadhim Al-Attafi, Andrew Nattestad, Yusuke Yamauchi, Shi Xue Dou, Jung Ho Kim
Aggregated Mesoporous Nanoparticles For High Surface Area Light Scattering Layer Tio2 Photoanodes In Dye-Sensitized Solar Cells, Kadhim Al-Attafi, Andrew Nattestad, Yusuke Yamauchi, Shi Xue Dou, Jung Ho Kim
Australian Institute for Innovative Materials - Papers
Hierarchically structured aggregates, consisting of TiO2 nanoparticles were produced via one-step solvothermal syntheses with a mixed solvent system containing both acetic acid and ethanol. Two of the resulting structures, one ~700nm and the other ~300nm in diameter, were found to be comprised of 8.5nm and 10.5nm anatase crystals, and possess specifc surface areas of 138 and 106m2g−1 respectively. These particles were incorporated into Dye-sensitized Solar Cells (DSCs) as high surface area scattering layers, along with a layer of a transparent material. Solar-to-electric conversion efciencies (PCE) of 9.1% and 8.2% were recorded using these aggregated particles as compared to those of …
Real-Time Powder Diffraction Studies Of Energy Materials Under Non-Equilibrium Conditions, Vanessa K. Peterson, Josie Auckett, Wei Kong Pang
Real-Time Powder Diffraction Studies Of Energy Materials Under Non-Equilibrium Conditions, Vanessa K. Peterson, Josie Auckett, Wei Kong Pang
Australian Institute for Innovative Materials - Papers
Energy materials form the central part of energy devices. An essential part of their function is the ability to reversibly host charge or energy carriers, and analysis of their phase composition and structure in real time under nonequilibrium conditions is mandatory for a full understanding of their atomicscale functional mechanism. Real-time powder diffraction is increasingly being applied for this purpose, forming a critical step in the strategic chemical engineering of materials with improved behaviour. This topical review gives examples of real-time analysis using powder diffraction of rechargeable battery electrodes and porous sorbent materials used for the separation and storage of …
Inkjet-Printed Planar Biochips For Interfacial Detection Of Biomoleculars, Jianglin Diao, Ailing Ding, Yuqing Liu, Joselito M. Razal, Jun Chen, Zhisong Lu, Bin Wang
Inkjet-Printed Planar Biochips For Interfacial Detection Of Biomoleculars, Jianglin Diao, Ailing Ding, Yuqing Liu, Joselito M. Razal, Jun Chen, Zhisong Lu, Bin Wang
Australian Institute for Innovative Materials - Papers
A planar three electrodes system (PTES) chip which is consisted of planar Au, Ag/AgCl, and Pt electrodes on ITO (Indium-Tin Oxide) glass is fabricated using state of the art inkjet printing technology to serve as biosensor for electrochemical detection of biomolecules. The electrochemical detection of melamine and dopamine is successfully performed with this PTES chip and established higher sensitivity in comparison with traditional commercial three electrode system, indicating this PTES chip has great potential in practical applications as electrochemical sensor for biomolecules.
Few Atomic Layered Lithium Cathode Materials To Achieve Ultrahigh Rate Capability In Lithium-Ion Batteries, Zhixin Tai, Chandrasekar Mayandi Subramaniyam, Shulei Chou, Lingna Chen, Hua-Kun Liu, Shi Xue Dou
Few Atomic Layered Lithium Cathode Materials To Achieve Ultrahigh Rate Capability In Lithium-Ion Batteries, Zhixin Tai, Chandrasekar Mayandi Subramaniyam, Shulei Chou, Lingna Chen, Hua-Kun Liu, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
The most promising cathode materials, including LiCoO2 (layered), LiMn2O4 (spinel), and LiFePO4 (olivine), have been the focus of intense research to develop rechargeable lithium-ion batteries (LIBs) for portable electronic devices. Sluggish lithium diffusion, however, and unsatisfactory long-term cycling performance still limit the development of present LIBs for several applications, such as plug-in/hybrid electric vehicles. Motivated by the suc-cess of graphene and novel 2D materials with unique physical and chemical properties, herein, a simple shear-assisted mechanical exfoliation method to synthesize few-layered nanosheets of LiCoO2, LiMn2O4, and LiFePO4 is used. Importantly, these as-prepared nanosheets with preferred orientations and optimized stable structures exhibit …
Reverse Microemulsion Synthesis Of Sulfur/Graphene Composite For Lithium/Sulfur Batteries, Mohammad Kaiser, Zhaohui Ma, Xiwen Wang, Fudong Han, Tao Gao, Xiulin Fan, Jiazhao Wang, Hua-Kun Liu, Shi Xue Dou, Chunsheng Wang
Reverse Microemulsion Synthesis Of Sulfur/Graphene Composite For Lithium/Sulfur Batteries, Mohammad Kaiser, Zhaohui Ma, Xiwen Wang, Fudong Han, Tao Gao, Xiulin Fan, Jiazhao Wang, Hua-Kun Liu, Shi Xue Dou, Chunsheng Wang
Australian Institute for Innovative Materials - Papers
Due to its high theoretical capacity, high energy density, and easy availability, the lithium-sulfur (Li-S) system is considered to be the most promising candidate for electric and hybrid electric vehicle applications. Sulfur/carbon cathode in Li-S batteries still suffers, however, from low Coulombic efficiency and poor cycle life when sulfur loading and the ratio of sulfur to carbon are high. Here, we address these challenges by fabricating a sulfur/carboxylated-graphene composite using a reverse (water-in-oil) microemulsion technique. The fabricated sulfur-graphene composite cathode, which contains only 6 wt % graphene, can dramatically improve the cycling stability as well as provide high capacity. The …