Open Access. Powered by Scholars. Published by Universities.®

Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 30 of 1278

Full-Text Articles in Engineering

H-Infinity Adaptive Observer Enhancements For Vehicle Chassis Dynamics-Based Navigation Sensor Fault Construction, Linlin Xia, Jingyu Cong, Xun Xu, Yiping Gao, Shufeng Zhang Jan 2020

H-Infinity Adaptive Observer Enhancements For Vehicle Chassis Dynamics-Based Navigation Sensor Fault Construction, Linlin Xia, Jingyu Cong, Xun Xu, Yiping Gao, Shufeng Zhang

Australian Institute for Innovative Materials - Papers

© The Author(s) 2020. The issues of chassis dynamics-based navigation sensor fault and state estimation in land vehicles are specialized in this study. Owing to the essential attributes of robust theory-based observers, an H-infinity adaptive observer is proposed to implement the fault reconstructions of faulty sensors, offering a reference to vehicles for further favorable control decision-making. This observer fuses a linear matrix inequality convex optimization strategy, with the dynamics of land vehicles established mathematically, the consequent problems associated with augmented descriptor system state-space model, Lyapunov stability and linear matrix inequality convex optimization are discussed in detail. The numerical simulations on ...


Stabilization Of Skyrmions In A Nanodisk Without An External Magnetic Field, Hang Li, Collins Akosa, Peng Yan, Yuanxu Wang, Zhenxiang Cheng Jan 2020

Stabilization Of Skyrmions In A Nanodisk Without An External Magnetic Field, Hang Li, Collins Akosa, Peng Yan, Yuanxu Wang, Zhenxiang Cheng

Australian Institute for Innovative Materials - Papers

We study, in the absence of a magnetic field, the stability of skyrmions in a disk-shaped ferromagnetic multilayer in the presence of locally pinned spins at the edge. This particular boundary condition suppresses the formation of helical states yet enhances the stabilization of states with rotational symmetry, such as Neél skyrmions. Numerical simulation shows that the size of the disk is a viable parameter to control the creation and annihilation of skyrmionic states. We also find that the demagnetization field renormalizes the Dzyaloshinskii-Moriya interaction. This study opens an alternative avenue to the generation, stabilization, and control of magnetic skyrmions in ...


Scaling Behavior Of Quasi-One-Dimensional Vortex Avalanches In Superconducting Films, A Qviller, T Qureishy, Y Xu, H Suo, P Mozhaev, J Hansen, J Vestgården, Tom H. Johansen, Pavlo Mikheenko Jan 2020

Scaling Behavior Of Quasi-One-Dimensional Vortex Avalanches In Superconducting Films, A Qviller, T Qureishy, Y Xu, H Suo, P Mozhaev, J Hansen, J Vestgården, Tom H. Johansen, Pavlo Mikheenko

Australian Institute for Innovative Materials - Papers

Scaling behaviour of dynamically driven vortex avalanches in superconducting YBa2Cu3O7-δ films deposited on tilted crystalline substrates has been observed using quantitative magneto-optical imaging. Two films with different tilt angles are characterized by the probability distributions of avalanche size in terms of the number of moving vortices. It is found in both samples that these distributions follow power-laws over up to three decades, and have exponents ranging between 1.0 and 1.4. The distributions also show clear finite-size scaling, when the system size is defined by the depth of the flux penetration front - a signature of self-organized criticality. A scaling ...


Multiphase Identification In Ni-Pbte Contacts By Ebsd And Aberration-Corrected Stem, Xavier Reales Ferreres, Gilberto Casillas, Sima Aminorroaya-Yamini, Azdiar Adil Gazder Jan 2020

Multiphase Identification In Ni-Pbte Contacts By Ebsd And Aberration-Corrected Stem, Xavier Reales Ferreres, Gilberto Casillas, Sima Aminorroaya-Yamini, Azdiar Adil Gazder

Australian Institute for Innovative Materials - Papers

EBSD in combination with aberration-corrected STEM is used to study the interfacial layer forming at Ni electrode - PbTe thermoelectric material interfaces. Contrary to previous studies, both orthorhombic and monoclinic phases are identified within the interfacial layer. EBSD and STEM data at interphase boundaries demonstrate an approximately smooth transition from orthorhombic to monoclinic phase with almost no crystal defects due to the small differences in lattice parameters and the prevalence of one of two previously unknown orientation relationships between the phases. Moreover, the presence of special boundaries resulting in orientation domains within both phases throughout the interfacial nickel telluride layer needs ...


Green Synthesis And Stabilization Of Silver Nanoparticles Using Lysimachia Foenum-Graecum Hance Extract And Their Antibacterial Activity, Widsanusan Chartarrayawadee, Phattaraporn Charoensin, Juthaporn Saenma, Thearum Rin, Phichaya Khamai, Pitak Nasomjai, Chee O. Too Jan 2020

Green Synthesis And Stabilization Of Silver Nanoparticles Using Lysimachia Foenum-Graecum Hance Extract And Their Antibacterial Activity, Widsanusan Chartarrayawadee, Phattaraporn Charoensin, Juthaporn Saenma, Thearum Rin, Phichaya Khamai, Pitak Nasomjai, Chee O. Too

Australian Institute for Innovative Materials - Papers

2020 Chartarrayawadee et al., published by De Gruyter 2020. The Lysimachia foenumgraecum Hance extract (LHE) was used for silver nanoparticles (AgNPs) synthesis. In this study, the herbal plant of Lysimachia foenumgraecum Hance (LH) was extracted with deionized water and we are the first to successfully use LHE as reducing and stabilizing agents for the green synthesis of AgNPs. The concentration of LHE used in this study was in the range of 0.003 to 1.0 wt%. Aqueous colloidal solutions of AgNPs reduced and stabilized by LHE show long-term stability due to the steric stabilization effect. This can be confirmed ...


Effects Of Boron Content On Microstructure And Wear Properties Of Fecocrnibx High-Entropy Alloy Coating By Laser Cladding, Dezheng Liu, Jing Zhao, Yan Li, Wenli Zhu, Liangxu Lin Jan 2020

Effects Of Boron Content On Microstructure And Wear Properties Of Fecocrnibx High-Entropy Alloy Coating By Laser Cladding, Dezheng Liu, Jing Zhao, Yan Li, Wenli Zhu, Liangxu Lin

Australian Institute for Innovative Materials - Papers

The FeCoCrNiBx high-entropy alloy (HEA) coatings with three different boron (B) contents were synthesized on Q245R steel (American grade: SA515 Gr60) by laser cladding deposition technology. Effects of B content on the microstructure and wear properties of FeCoCrNiBx HEA coating were investigated. In this study, the phase composition, microstructure, micro-hardness, and wear resistance (rolling friction) were investigated by X-ray diffraction (XRD), a scanning electron microscope (SEM), a micro hardness tester, and a roller friction wear tester, respectively. The FeCoCrNiBx coatings exhibited a typical dendritic and interdendritic structure, and the microstructure was refined with the increase of B content. Additionally, the ...


Design, Synthesis And Characterization Of A Novel Type Of Thermo-Responsible Phospholipid Microcapsule-Alginate Composite Hydrogel For Drug Delivery, Liang Ding, Xinxia Cui, Rui Jiang, Keya Zhou, Yalei Wen, Chenfeng Wang, Zhilian Yue, Shigang Shen, Xuefeng Pan Jan 2020

Design, Synthesis And Characterization Of A Novel Type Of Thermo-Responsible Phospholipid Microcapsule-Alginate Composite Hydrogel For Drug Delivery, Liang Ding, Xinxia Cui, Rui Jiang, Keya Zhou, Yalei Wen, Chenfeng Wang, Zhilian Yue, Shigang Shen, Xuefeng Pan

Australian Institute for Innovative Materials - Papers

Liposomes are extensively used in drug delivery, while alginates are widely used in tissue engineering. However, liposomes are usually thermally unstable and drug-leaking when in liquids, while the drug carriers made of alginates show low loading capacities when used for drug delivery. Herein, we developed a type of thermo-responsible liposome-alginate composite hydrogel (TSPMAH) by grafting thermo-responsive liposomes onto alginates by using Ca2+ mediated bonding between the phosphatidic serine (PS) in the liposome membrane and the alginate. The temperature-sensitivity of the liposomes was actualized by using phospholipids comprising dipalmitoylphosphatidylcholine (DPPC) and PS and the liposomes were prepared by a thin-film dispersion ...


Rich Topological Nodal Line Bulk States Together With Drum-Head-Like Surface States In Naalge With Anti-Pbfcl Type Structure, Xiaotian Wang, Guangqian Ding, Zhenxiang Cheng, Gokhan Surucu, Xiaolin Wang, Tie Yang Jan 2020

Rich Topological Nodal Line Bulk States Together With Drum-Head-Like Surface States In Naalge With Anti-Pbfcl Type Structure, Xiaotian Wang, Guangqian Ding, Zhenxiang Cheng, Gokhan Surucu, Xiaolin Wang, Tie Yang

Australian Institute for Innovative Materials - Papers

The band topology in condensed matter has attracted widespread attention in recent years. Due to the band inversion, topological nodal line semimetals (TNLSs) have band crossing points (BCPs) around the Fermi level, forming a nodal line. In this work, by means of first-principles, we observe that the synthesized NaAlGe intermetallic compound with anti-PbFCl type structure is a TNLS with four NLs in the kz = 0 and kz = π planes. All these NLs in NaAlGe exist around the Fermi level, and what is more, these NLs do not overlap with other bands. The exotic drum-head-like surface states can be clearly observed ...


Reversible Structural Evolution Of Sodium-Rich Rhombohedral Prussian Blue For Sodium-Ion Batteries, Wanlin Wang, Yong Gang, Zhe Hu, Zichao Yan, Weijie Li, Yongcheng Li, Qinfen Gu, Zhixing Wang, Shulei Chou, Hua-Kun Liu, Shi Xue Dou Jan 2020

Reversible Structural Evolution Of Sodium-Rich Rhombohedral Prussian Blue For Sodium-Ion Batteries, Wanlin Wang, Yong Gang, Zhe Hu, Zichao Yan, Weijie Li, Yongcheng Li, Qinfen Gu, Zhixing Wang, Shulei Chou, Hua-Kun Liu, Shi Xue Dou

Australian Institute for Innovative Materials - Papers

2020, The Author(s). Iron-based Prussian blue analogs are promising low-cost and easily prepared cathode materials for sodium-ion batteries. Their materials quality and electrochemical performance are heavily reliant on the precipitation process. Here we report a controllable precipitation method to synthesize high-performance Prussian blue for sodium-ion storage. Characterization of the nucleation and evolution processes of the highly crystalline Prussian blue microcubes reveals a rhombohedral structure that exhibits high initial Coulombic efficiency, excellent rate performance, and cycling properties. The phase transitions in the as-obtained material are investigated by synchrotron in situ powder X-ray diffraction, which shows highly reversible structural transformations between ...


Collective Directional Locking Of Colloidal Monolayers On A Periodic Substrate, Ralph Stoop, Arthur Straube, Tom H. Johansen, Pietro Tierno Jan 2020

Collective Directional Locking Of Colloidal Monolayers On A Periodic Substrate, Ralph Stoop, Arthur Straube, Tom H. Johansen, Pietro Tierno

Australian Institute for Innovative Materials - Papers

We investigate the directional locking effects that arise when a monolayer of paramagnetic colloidal particles is driven across a triangular lattice of magnetic bubbles. We use an external rotating magnetic field to generate a two-dimensional traveling wave ratchet forcing the transport of particles along a direction that intersects two crystallographic axes of the lattice. We find that, while single particles show no preferred direction, collective effects induce transversal current and directional locking at high density via a spontaneous symmetry breaking. The colloidal current may be polarized via an additional bias field that makes one transport direction energetically preferred.


Electrical Stimulation-Induced Osteogenesis Of Human Adipose Derived Stem Cells Using A Conductive Graphene-Cellulose Scaffold, Jianfeng Li, Xiao Liu, Jeremy Micah Crook, Gordon G. Wallace Jan 2020

Electrical Stimulation-Induced Osteogenesis Of Human Adipose Derived Stem Cells Using A Conductive Graphene-Cellulose Scaffold, Jianfeng Li, Xiao Liu, Jeremy Micah Crook, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

The versatile properties of graphene-based materials are enabling various tissue regeneration, towards meeting an ever increasing demand for replacement tissues due to injury through trauma and disease. In particular, an innate ability for graphene to promote osteogenic differentiation of stem cells, combined with the potential to enhance the biological activity of cells through electrical stimulation (ES) using graphene, supports its use for osteoinduction or reconstruction. In this paper, we describe a miniaturized graphene-cellulose (G-C) scaffold-based device that incorporates electroactive G-C 'paper' within a polystyrene chamber for concomitant cell culture and ES. The G-C electrodes possessed lower impedance and higher charge ...


Electrochemical And Optical Aspects Of Cobalt Meso-Carbazole Substituted Porphyrin Complexes, Katarzyna Laba, Mieczyslaw Lapkowski, David L. Officer, Pawel W. Wagner, Przemyslaw Data Jan 2020

Electrochemical And Optical Aspects Of Cobalt Meso-Carbazole Substituted Porphyrin Complexes, Katarzyna Laba, Mieczyslaw Lapkowski, David L. Officer, Pawel W. Wagner, Przemyslaw Data

Australian Institute for Innovative Materials - Papers

A series of cobalt (II) porphyrin complexes modified with carbazole rings at one or more meso positions of the macrocycle were synthesized and characterized as to their spectroscopic and basic electrochemical properties in non-aqueous media. The effect of the number and position (syn and anti) of carbazole groups on the complexes properties were investigated. The comparison was made to cobalt (II) porphyrin containing mesityl groups at the meso-positions. The relation between the site of redox processes in cobalt meso-carbazole substituted porphyrins were analysed. It was shown that the conjugated π-ring system of the porphyrin macrocycle, the cobalt central metal ion ...


Biochar-Based Fertilizer: Supercharging Root Membrane Potential And Biomass Yield Of Rice, Jinkiat Chew, Longlong Zhu, Shaun Nielsen, Ellen Graber, David R. G Mitchell, Josip Horvat, Mohanad Hazim Mohammed, Minglong Liu, Lukas Van Zwieten, Scott Donne, Paul Munroe, Sarasadat Taherymoosavi, Ben Pace, Aditya Rawal, James Hook, Christopher Marjo, Donald Thomas, Genxing Pan, Lianqing Li, Rongjun Bian, Anna Mcbeath, Michael I. Bird, Torsten Thomas, Olivier Husson, Zakaria M. Solaiman, Stephen D. Joseph, Xiaorong Fan Jan 2020

Biochar-Based Fertilizer: Supercharging Root Membrane Potential And Biomass Yield Of Rice, Jinkiat Chew, Longlong Zhu, Shaun Nielsen, Ellen Graber, David R. G Mitchell, Josip Horvat, Mohanad Hazim Mohammed, Minglong Liu, Lukas Van Zwieten, Scott Donne, Paul Munroe, Sarasadat Taherymoosavi, Ben Pace, Aditya Rawal, James Hook, Christopher Marjo, Donald Thomas, Genxing Pan, Lianqing Li, Rongjun Bian, Anna Mcbeath, Michael I. Bird, Torsten Thomas, Olivier Husson, Zakaria M. Solaiman, Stephen D. Joseph, Xiaorong Fan

Australian Institute for Innovative Materials - Papers

2020 The Authors Biochar-based compound fertilizers (BCF) and amendments have proven to enhance crop yields and modify soil properties (pH, nutrients, organic matter, structure etc.) and are now in commercial production in China. While there is a good understanding of the changes in soil properties following biochar addition, the interactions within the rhizosphere remain largely unstudied, with benefits to yield observed beyond the changes in soil properties alone. We investigated the rhizosphere interactions following the addition of an activated wheat straw BCF at an application rates of 0.25% (g·g−1 soil), which could potentially explain the increase of ...


The Influence Of A Novel Inorganic-Polymer Lubricant On The Microstructure Of Interstitial-Free Steel During Ferrite Rolling, Ning Kong, Jie Zhang, Hongbo Li, Boyu Wei, David R. G Mitchell Jan 2020

The Influence Of A Novel Inorganic-Polymer Lubricant On The Microstructure Of Interstitial-Free Steel During Ferrite Rolling, Ning Kong, Jie Zhang, Hongbo Li, Boyu Wei, David R. G Mitchell

Australian Institute for Innovative Materials - Papers

2020 by the authors. Licensee MDPI, Basel, Switzerland. A novel polyphosphate lubricant was used and evaluated during hot (ferrite) rolling of an interstitial-free (IF) steel. The texture evolution of these rolled IF steels have been examined by means of X-ray diffraction (XRD) and electron backscatter diffraction (EBSD) measurements. The polyphosphate lubricant shows an improved lubrication performance in terms of the texture optimization compared with lubricating oil and with unlubricated conditions. The γ-fiber texture is enhanced, and less shear texture is produced. This microstructure is responsible for enhanced drawability of ferrite rolled IF steels. The very high thermal stability of the ...


Ultrahigh Energy Storage Properties In (Sr0.7bi0.2)Tio3-Bi(Mg0.5zr0.5)O3 Lead-Free Ceramics And Potential For High-Temperature Capacitors, Xi Kong, Letao Yang, Zhenxiang Cheng, Shujun Zhang Jan 2020

Ultrahigh Energy Storage Properties In (Sr0.7bi0.2)Tio3-Bi(Mg0.5zr0.5)O3 Lead-Free Ceramics And Potential For High-Temperature Capacitors, Xi Kong, Letao Yang, Zhenxiang Cheng, Shujun Zhang

Australian Institute for Innovative Materials - Papers

2020 by the authors. Due to the enhanced demand for numerous electrical energy storage applications, including applications at elevated temperatures, dielectric capacitors with optimized energy storage properties have attracted extensive attention. In this study, a series of lead-free strontium bismuth titanate based relaxor ferroelectric ceramics have been successfully synthesized by high temperature solid-state reaction. The ultrahigh recoverable energy storage density of 4.2 J/cm3 under 380 kV/cm, with the high efficiency of 88%, was obtained in the sample with x = 0.06. Of particular importance is that this ceramic composition exhibits excellent energy storage performance over a wide ...


Flexible Lead-Free Bfo-Based Dielectric Capacitor With Large Energy Density, Superior Thermal Stability, And Reliable Bending Endurance, Chang Hong Yang, Jin Qian, Panpan Lv, Haitao Wu, Xiujuan Lin, Kun Wang, Jun Ouyang, Shifeng Huang, Xin Cheng, Zhenxiang Cheng Jan 2020

Flexible Lead-Free Bfo-Based Dielectric Capacitor With Large Energy Density, Superior Thermal Stability, And Reliable Bending Endurance, Chang Hong Yang, Jin Qian, Panpan Lv, Haitao Wu, Xiujuan Lin, Kun Wang, Jun Ouyang, Shifeng Huang, Xin Cheng, Zhenxiang Cheng

Australian Institute for Innovative Materials - Papers

As an essential energy-stored device, the inorganic dielectric film capacitor plays an irreplaceable role in high-energy pulse power technology area. In this work, propelled by the challenge of overcoming the bottlenecks of inflexibility and inferior energy storage density of the pure BiFeO3 films, the mica with high bendability and thermal stability is adopted as substrate, and the relaxor ferroelectric (Sr0.7Bi0.2)TiO3 is introduced to form solid solution to introduce relaxor behavior. The subsequently fabricated 0.3Bi(Fe0.95Mn0.05)O3-0.7(Sr0.7Bi0.2)TiO3 (BFMO-SBT) thin film capacitor exhibits a high recoverable energy storage density (Wrec = 61 ...


Synthesis Of Hierarchical Sn/Sno Nanosheets Assembled By Carbon-Coated Hollow Nanospheres As Anode Materials For Lithium/Sodium Ion Batteries, Fengrong He, Qi Xu, Baoping Zheng, Jun Zhang, Zhenguo Wu, Yanjun Zhong, Yanxiao Chen, Wei Xiang, Benhe Zhong, Xiaodong Guo Jan 2020

Synthesis Of Hierarchical Sn/Sno Nanosheets Assembled By Carbon-Coated Hollow Nanospheres As Anode Materials For Lithium/Sodium Ion Batteries, Fengrong He, Qi Xu, Baoping Zheng, Jun Zhang, Zhenguo Wu, Yanjun Zhong, Yanxiao Chen, Wei Xiang, Benhe Zhong, Xiaodong Guo

Australian Institute for Innovative Materials - Papers

This journal is The Royal Society of Chemistry. Tin-based anode materials have aroused interest due to their high capacities. Nevertheless, the volume expansion problem during lithium insertion/extraction processes has severely hindered their practical application. In particular, nano-micro hierarchical structure is attractive with the integrated advantages of nano-effect and high thermal stability of the microstructure. Herein, hierarchical Sn/SnO nanosheets assembled by carbon-coated hollow nanospheres were successfully synthesized by a facile glucose-assisted hydrothermal method, in which the glucose served as both morphology-control agent and carbon source. The hierarchical Sn/SnO nanosheets exhibit excellent electrochemical performances owing to the unique configuration ...


Electrochemical Preparation System For Unique Mesoporous Hemisphere Gold Nanoparticles Using Block Copolymer Micelles, Hyunsoo Lim, Tomota Nagaura, Minjun Kim, Kenya Kani, Jeonghun Kim, Yoshio Bando, Saad Alshehri, Tansir Ahamad, Jungmok You, Jongbeom Na, Yusuke Yamauchi Jan 2020

Electrochemical Preparation System For Unique Mesoporous Hemisphere Gold Nanoparticles Using Block Copolymer Micelles, Hyunsoo Lim, Tomota Nagaura, Minjun Kim, Kenya Kani, Jeonghun Kim, Yoshio Bando, Saad Alshehri, Tansir Ahamad, Jungmok You, Jongbeom Na, Yusuke Yamauchi

Australian Institute for Innovative Materials - Papers

© 2020 The Royal Society of Chemistry. Gold nanoparticles (AuNPs) are widely used in various applications, such as biological delivery, catalysis, and others. In this report, we present a novel synthetic method to prepare mesoporous hemisphere gold nanoparticles (MHAuNPs) via electrochemical reduction reaction with the aid of polymeric micelle assembly as a pore-directing agent.


Graphene Oxide–Based Nanomaterials: An Insight Into Retinal Prosthesis, Jia Yang, Zih Yu, Sheng Cheng, Johnson Chung, Xiao Liu, Chung Wu, Shien Lin, Guan Chen Jan 2020

Graphene Oxide–Based Nanomaterials: An Insight Into Retinal Prosthesis, Jia Yang, Zih Yu, Sheng Cheng, Johnson Chung, Xiao Liu, Chung Wu, Shien Lin, Guan Chen

Australian Institute for Innovative Materials - Papers

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. Retinal prosthesis has recently emerged as a treatment strategy for retinopathies, providing excellent assistance in the treatment of age-related macular degeneration (AMD) and retinitis pigmentosa. The potential application of graphene oxide (GO), a highly biocompatible nanomaterial with superior physicochemical properties, in the fabrication of electrodes for retinal prosthesis, is reviewed in this article. This review integrates insights from biological medicine and nanotechnology, with electronic and electrical engineering technological breakthroughs, and aims to highlight innovative objectives in developing biomedical applications of retinal prosthesis.


Biobr Nanoflakes With Strong Kerr Nonlinearity Towards Hybrid Integrated Photonic Devices, Linnan Jia, Dandan Cui, Jiayang Wu, Haifeng Feng, Yunyi Yang, Tieshan Yang, Yang Qu, Yi Du, Weichang Hao, Baohua Jia, David Moss Jan 2020

Biobr Nanoflakes With Strong Kerr Nonlinearity Towards Hybrid Integrated Photonic Devices, Linnan Jia, Dandan Cui, Jiayang Wu, Haifeng Feng, Yunyi Yang, Tieshan Yang, Yang Qu, Yi Du, Weichang Hao, Baohua Jia, David Moss

Australian Institute for Innovative Materials - Papers

© 2020 SPIE. As a new group of advanced 2D layered materials, bismuth oxyhalides, i.e., BiOX (X = Cl, Br, I), have recently become of great interest. In this work, we characterize the third-order optical nonlinearities of BiOBr, an important member of the BiOX family. The nonlinear absorption and Kerr nonlinearity of BiOBr nanoflakes at both 800 nm and 1550 nm are characterized via the Z-Scan technique. Experimental results show that BiOBr nanoflakes exhibit a large nonlinear absorption coefficient β ∼ 10-7 m/W as well as a large Kerr coefficient n2 ∼ 10-14 m2/W. We also note that the n2 of ...


Light Soaking Effect Driven In Porphyrin Dye-Sensitized Solar Cells Using 1d Tio2 Nanotube Photoanodes, Jung-Ho Yun, Attila J. Mozer, Pawel W. Wagner, David Offier, Rose Amal, Yun Hau Ng Jan 2020

Light Soaking Effect Driven In Porphyrin Dye-Sensitized Solar Cells Using 1d Tio2 Nanotube Photoanodes, Jung-Ho Yun, Attila J. Mozer, Pawel W. Wagner, David Offier, Rose Amal, Yun Hau Ng

Australian Institute for Innovative Materials - Papers

© 2020 Light soaking (LS) effect on porphyrin (GD2) dye-sensitized solar cells (DSSCs) using well-ordered TiO2 nanotube (TNT) photoanodes was studied with different lengths of TNTs and LS treatment time. The TNT array possessing longer length and larger tube diameter had improved photoelectrochemical (PEC) property by generating larger photocurrent, and besides provided a larger surface area to yield more dye loading. The LS effect on GD2-applied DSSCs using TNT photoanodes was triggered off in the first 5 min of the LS treatment, and gradually increased during 60 min LS treatment. The improved PEC property and dye loading by longer TNT array ...


Site Preference And Tetragonal Distortion In Palladium-Rich Heusler Alloys, Mengxin Wu, Yilin Han, Abdelmadjid Bouhemadou, Zhenxiang Cheng, Rabah Khenata, Minquan Kuang, Xiangjiang Wang, Tie Yang, Hongkuan Yuan, Xiaotian Wang Jan 2019

Site Preference And Tetragonal Distortion In Palladium-Rich Heusler Alloys, Mengxin Wu, Yilin Han, Abdelmadjid Bouhemadou, Zhenxiang Cheng, Rabah Khenata, Minquan Kuang, Xiangjiang Wang, Tie Yang, Hongkuan Yuan, Xiaotian Wang

Australian Institute for Innovative Materials - Papers

In this work, two kinds of competition between different Heusler structure types are considered, one is the competition between XA and L21 structures based on the cubic system of full-Heusler alloys, Pd2 YZ (Y = Co, Fe, Mn; Z = B, Al, Ga, In, Tl, Si, Ge, Sn, Pb, P, As, Sb). Most alloys prefer the L21 structure; that is, Pd atoms tend to occupy the a (0, 0, 0) and c (0.5, 0.5, 0.5) Wyckoff sites, the Y atom is generally located at site b (0.25, 0.25, 0.25), and the main group element Z has ...


Recent Progress On Germanene And Functionalized Germanene: Preparation, Characterizations, Applications, And Challenges, Nana Liu, Guyue Bo, Yani Liu, Xun Xu, Yi Du, Shi Xue Dou Jan 2019

Recent Progress On Germanene And Functionalized Germanene: Preparation, Characterizations, Applications, And Challenges, Nana Liu, Guyue Bo, Yani Liu, Xun Xu, Yi Du, Shi Xue Dou

Australian Institute for Innovative Materials - Papers

2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim A new family of single-atom-thick 2D germanium-based materials with graphene-like atomic arrangement, germanene and functionalized germanene, has attracted intensive attention due to their large bandgap and easily tailored electronic properties. Unlike carbon atoms in graphene, germanium atoms tend to adopt mixed sp 2 /sp 3 hybridization in germanene, which makes it chemically active on the surface and allows its electronic states to be easily tuned by chemical functionalization. Impressive achievements in terms of the applications in energy storage and catalysis have been reported by using germanene and functionalized germanene. Herein, the fabrication of ...


Simultaneous Tuning Of Magnetocrystalline Anisotropy And Spin Reorientation Transition Via Cu Substitution In Mn-Ni-Ga Magnets For Nanoscale Biskyrmion Formation, Guizhou Xu, Yurong You, Jiaxuan Tang, Hongguo Zhang, Hang Li, Xuefei Miao, Yuanyuan Gong, Zhipeng Hou, Zhenxiang Cheng, Jian Li Wang, Andrew J. Studer, Feng Xu, Wenhong Wang Jan 2019

Simultaneous Tuning Of Magnetocrystalline Anisotropy And Spin Reorientation Transition Via Cu Substitution In Mn-Ni-Ga Magnets For Nanoscale Biskyrmion Formation, Guizhou Xu, Yurong You, Jiaxuan Tang, Hongguo Zhang, Hang Li, Xuefei Miao, Yuanyuan Gong, Zhipeng Hou, Zhenxiang Cheng, Jian Li Wang, Andrew J. Studer, Feng Xu, Wenhong Wang

Australian Institute for Innovative Materials - Papers

Skyrmions with multiple helicity or topology in centrosymmetric crystals are intriguing magnetic-domain objects due to their diverse dynamics under external stimuli. Here we illustrate how the two key gradients of magnetocrystalline anisotropy (MCA) and spin reorientation transition (SRT) affect the skyrmion formation and topology by Cu substitution in the biskyrmion-host MnNiGa alloy. The MCA and SRT are simultaneously tuned in a large scope, while the original high Curie temperature (TC) is retained. Detailed neutron-scattering studies revealed the construction of a noncollinear canted magnetic structure below the SRT temperature (TSR), which effectively correlates the SRT with the evolution of the MCA ...


Phase Evolution In Calcium Molybdate Nanoparticles As A Function Of Synthesis Temperature And Its Electrochemical Effect On Energy Storage, Manickam Minakshi, David R. G Mitchell, Christian Baur, Johann Chable, Anders Barlow, Maximilian Fichtner, Amitava Banerjee, Sudip Chakraborty, Rajeev Ahuja Jan 2019

Phase Evolution In Calcium Molybdate Nanoparticles As A Function Of Synthesis Temperature And Its Electrochemical Effect On Energy Storage, Manickam Minakshi, David R. G Mitchell, Christian Baur, Johann Chable, Anders Barlow, Maximilian Fichtner, Amitava Banerjee, Sudip Chakraborty, Rajeev Ahuja

Australian Institute for Innovative Materials - Papers

The design of a suitable electrode is an essential and fundamental research challenge in the field of electrochemical energy storage because the electronic structures and morphologies determine the surface redox reactions. Calcium molybdate (CaMoO4) was synthesized by a combustion route at 300 C and 500 C. We describe new findings on the behaviour of CaMoO4 and evaluate the influence of crystallinity on energy storage performance. A wide range of characterization techniques was used to obtain detailed information about the physical and morphological characteristics of CaMoO4. The characterization results enable the phase evolution as a function of the electrode synthesis temperature ...


3d Scaffolds Of Polycaprolactone/Copper-Doped Bioactive Glass: Architecture Engineering With Additive Manufacturing And Cellularassessments In A Coculture Of Bone Marrow Stem Cells And Endothelial Cells, Xiaoju Wang, Binbin Zhang, Sanna Pitkanen, Miina Ojansivu, Chunlin Xu, Markus Hannula, Jari A. Hyttinen, Susanna S. Miettinen, Leena Hupa, Gordon G. Wallace Jan 2019

3d Scaffolds Of Polycaprolactone/Copper-Doped Bioactive Glass: Architecture Engineering With Additive Manufacturing And Cellularassessments In A Coculture Of Bone Marrow Stem Cells And Endothelial Cells, Xiaoju Wang, Binbin Zhang, Sanna Pitkanen, Miina Ojansivu, Chunlin Xu, Markus Hannula, Jari A. Hyttinen, Susanna S. Miettinen, Leena Hupa, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

The local delivery of Cu2+ from copper-doped bioactive glass (Cu-BaG) was combined with 3D printing of polycaprolactone (PCL) scaffolds for its potent angiogenic effect in bone tissue engineering. PCL and Cu-BaG were, respectively, dissolved and dispersed in acetone to formulate a moderately homogeneous ink. The PCL/Cu-BaG scaffolds were fabricated via direct ink writing into a cold ethanol bath. The architecture of the printed scaffolds, including strut diameter, strut spacing, and porosity, were investigated and characterized. The PCL/Cu-BaG scaffolds showed a Cu-BaG content-dependent mechanical property, as the compressive Young's modulus ranged from 7 to 13 MPa at an ...


Smart Machine Learning Or Discovering Meaningful Physical And Chemical Contributions Through Dimensional Stacking, Lee Griffin, Iaroslav Gaponenko, Shujun Zhang, Nazanin Bassiri-Gharb Jan 2019

Smart Machine Learning Or Discovering Meaningful Physical And Chemical Contributions Through Dimensional Stacking, Lee Griffin, Iaroslav Gaponenko, Shujun Zhang, Nazanin Bassiri-Gharb

Australian Institute for Innovative Materials - Papers

Despite remarkable advances in characterization techniques of functional materials yielding an ever growing amount of data, the interplay between the physical and chemical phenomena underpinning materials' functionalities is still often poorly understood. Dimensional reduction techniques have been used to tackle the challenge of understanding materials' behavior, leveraging the very large amount of data available. Here, we present a method for applying physical and chemical constraints to dimensional reduction analysis, through dimensional stacking. Compared to traditional, uncorrelated techniques, this approach enables a direct and simultaneous assessment of behaviors across all measurement parameters, through stacking of data along specific dimensions as required ...


Electrical Properties Of Yttrium Calcium Oxyborate Crystal Annealed At High Temperature And Low Oxygen Partial Pressure, Shiwei Tian, Lili Li, Feifei Chen, Chao Jiang, Fapeng Yu, Yanlu Li, Xiulan Duan, Zhengping Wang, Shujun Zhang, Xian Zhao Jan 2019

Electrical Properties Of Yttrium Calcium Oxyborate Crystal Annealed At High Temperature And Low Oxygen Partial Pressure, Shiwei Tian, Lili Li, Feifei Chen, Chao Jiang, Fapeng Yu, Yanlu Li, Xiulan Duan, Zhengping Wang, Shujun Zhang, Xian Zhao

Australian Institute for Innovative Materials - Papers

The yttrium calcium oxyborate crystal (YCa 4 O(BO 3 ) 3 , YCOB) has been actively studied for high-temperature piezoelectric sensing applications. In this work, the stability of electric properties of YCOB crystal annealed in critical conditions (high-temperatures of 900-1100 °C with a low oxygen partial pressure of 4 x 10 −6 atm for 24 h) was investigated and the recovery mechanism for the electrical resisitivity, dielectric permittivity and dielectric loss were studied, taking advantage of the X-ray photoelectron spectra and the first principle calculations. The electrical resistivity of the annealed YCOB crystal was slightly decreased when compared to the pristine ...


(Bi0.51 Na0.47)Tio3 Based Lead Free Ceramics With High Energy Density And Efficiency, Yu Huang, Fei Li, Hua Hao, Fangquan Xia, Hanxing Liu, Shujun Zhang Jan 2019

(Bi0.51 Na0.47)Tio3 Based Lead Free Ceramics With High Energy Density And Efficiency, Yu Huang, Fei Li, Hua Hao, Fangquan Xia, Hanxing Liu, Shujun Zhang

Australian Institute for Innovative Materials - Papers

Dielectric ceramics with high energy storage density and energy efficiency play an important role in high power energy storage applications. In this work, lead free relaxor ferroelectric ceramics in (1-x)Bi 0.51 Na 0.47 TiO 3 - xBa(Zr 0.3 Ti 0.7 )O 3 (BNT-BZT100x: x = 0.20, 0.30, 0.40 and 0.50) system are fabricated by conventional solid-state sintering method. The BNT-BZT100x ceramics are sintered dense with minimal pores, exhibiting pseudocubic symmetry and strong relaxor characteristic. A high energy storage density of 3.1 J/cm 3 and high energy efficiency of 91% are ...


Calcined Chicken Eggshell Electrode For Battery And Supercapacitor Applications, Manickam Minakshi, Stephen Higley, Christian Baur, David R. G Mitchell, Robert Jones, Maximilian Fichtner Jan 2019

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 ...