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

Engineering Commons

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

Articles 1 - 30 of 37

Full-Text Articles in Engineering

A Freestanding Cnts Film Fabricated By Pyrrole-Modified Cvd For Capacitive Deionization, Dan Song, Wenlei Guo, Tao Zhang, Pengyi Lu, Anran Guo, Feng Hou, Xiao Yan, Ji Liang Jan 2019

A Freestanding Cnts Film Fabricated By Pyrrole-Modified Cvd For Capacitive Deionization, Dan Song, Wenlei Guo, Tao Zhang, Pengyi Lu, Anran Guo, Feng Hou, Xiao Yan, Ji Liang

Australian Institute for Innovative Materials - Papers

Carbon nanotubes (CNTs) are an excellent electrode material for capacitive deionization (CDI), due to their excellent electronic conductivity and outstanding chemical/physical stability. Their powder form and easy aggregation, however, have greatly limited their practical CDI performance. Aiming to address this issue, the authors report a freestanding CNT film which was fabricated by floating-catalyst chemical vapor deposition, as a binder-free electrode for CDI. By simply adjusting the pyrrole content in the precursor, the morphology of the resulting CNT film can be tuned to meet the requirements of CDI. In the presence of 2 wt.% pyrrole, the CNT film with a ...


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

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

Australian Institute for Innovative Materials - Papers

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


Moss-Derived Mesoporous Carbon As Bi-Functional Electrode Materials For Lithium-Sulfur Batteries And Supercapacitors, Wen Lei, Haipeng Liu, Junlei Xiao, Yang Wang, Liangxu Lin Jan 2019

Moss-Derived Mesoporous Carbon As Bi-Functional Electrode Materials For Lithium-Sulfur Batteries And Supercapacitors, Wen Lei, Haipeng Liu, Junlei Xiao, Yang Wang, Liangxu Lin

Australian Institute for Innovative Materials - Papers

In this work, we reported a moss-derived biomass porous carbon (MPC) as a bi-functional electrode material for both the lithium-sulfur battery and the supercapacitor. The MPC was prepared from a high-temperature calcination procedure using the moss as the carbonaceous precursor. Using NaOH, the MPC was activated to give a mesoporous structure with a high specific surface area (1057.1 m2 g−1) and large pore volume (0.72 cm3 g−1). When it was used as the cathode material in lithium-sulfur batteries, the MPC material realized a sulfur loading and exhibited a remarkably improved electrochemical performance, i.e., a high ...


Manganese Based Layered Oxides With Modulated Electronic And Thermodynamic Properties For Sodium Ion Batteries, Kai Zhang, Duho Kim, Zhe Hu, Mihui Park, Gahee Noh, Yujeong Yang, Jing Zhang, Vincent Lau, Shulei Chou, Maenghyo Cho, Si-Young Choi, Yong-Mook Kang Jan 2019

Manganese Based Layered Oxides With Modulated Electronic And Thermodynamic Properties For Sodium Ion Batteries, Kai Zhang, Duho Kim, Zhe Hu, Mihui Park, Gahee Noh, Yujeong Yang, Jing Zhang, Vincent Lau, Shulei Chou, Maenghyo Cho, Si-Young Choi, Yong-Mook Kang

Australian Institute for Innovative Materials - Papers

Manganese based layered oxides have received increasing attention as cathode materials for sodium ion batteries due to their high theoretical capacities and good sodium ion conductivities. However, the Jahn–Teller distortion arising from the manganese (III) centers destabilizes the host structure and deteriorates the cycling life. Herein, we report that zinc-doped Na0.833[Li0.25Mn0.75]O2 can not only suppress the Jahn–Teller effect but also reduce the inherent phase separations. The reduction of manganese (III) amount in the zinc-doped sample, as predicted by first-principles calculations, has been confirmed by its high binding energies ...


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

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

Australian Institute for Innovative Materials - Papers

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


Preparation And Physical Properties Of A Cr3al Filmwith A Do3structure, Weiqi Zhao, Xuefang Dai, X M. Zhang, Z Mo, Xiaotian Wang, G F. Chen, Zhenxiang Cheng, Guodong Liu Jan 2019

Preparation And Physical Properties Of A Cr3al Filmwith A Do3structure, Weiqi Zhao, Xuefang Dai, X M. Zhang, Z Mo, Xiaotian Wang, G F. Chen, Zhenxiang Cheng, Guodong Liu

Australian Institute for Innovative Materials - Papers

A Cr3Al compound with a DO3 structure has previously been predicted to be nearly half metal and a promising spintronics material; however, its synthesis has not been reported. Here, a Cr3Al compound with a DO3 structure is successfully prepared in thin-film form by the magnetron sputtering method. It was found that the substrate temperature is crucial to the atomic ordering, thin-film density and lattice constant. The lattice constant varies with different substrate temperatures and is smaller than the theoretical equilibrium lattice constant. Theoretical investigations on the electronic structures and magnetic properties indicate that the Cr3Al compound with a DO3 structure ...


Flexible Piezoelectric Energy Harvester/Sensor With High Voltage Output Over Wide Temperature Range, Yanhua Sun, Jianguo Chen, Xiaoning Li, Yun Lu, Shujun Zhang, Zhenxiang Cheng Jan 2019

Flexible Piezoelectric Energy Harvester/Sensor With High Voltage Output Over Wide Temperature Range, Yanhua Sun, Jianguo Chen, Xiaoning Li, Yun Lu, Shujun Zhang, Zhenxiang Cheng

Australian Institute for Innovative Materials - Papers

A flexible piezoelectric energy harvester based on polyimide (PI)/(Bi,La)FeO 3 -PbTiO 3 (BLF-PT) 0-3 composite was fabricated by a cost-effective two-step process. The energy harvesting outputs are sensitive to the BLF-PT weight fraction and testing frequency. The flexible BLF-PT/PI composite with 30 wt% BLF-PT exhibits an open circuit voltage of 110 V and a short circuit current of 310 nA under pressure of 0.18 MPa at frequency of 1 Hz. Of particular significance is that the flexible energy harvester exhibits high temperature stability up to 150 °C and a voltage output of 30 V at ...


Quantum Oscillations In Iron-Doped Single Crystals Of The Topological Insulator S B2 T E3, Weiyao Zhao, David L. Cortie, Lei Chen, Zhi Li, Zengji Yue, Xiaolin Wang Jan 2019

Quantum Oscillations In Iron-Doped Single Crystals Of The Topological Insulator S B2 T E3, Weiyao Zhao, David L. Cortie, Lei Chen, Zhi Li, Zengji Yue, Xiaolin Wang

Australian Institute for Innovative Materials - Papers

We investigated the magnetotransport properties of Fe-doped topological insulator Sb1.96Fe0.04Te3 single crystals. With doping, the band structure changes significantly and multiple Fermi pockets become evident in the Shubnikov-de Haas oscillations, in contrast to the single frequency detected for pure Sb2Te3. Using complementary density functional theory calculations, we identify an additional bulk hole pocket introduced at the Γ point which originates from the chemical distortion associated with the Fe dopant. Experimentally, both doped and undoped samples are hole-carrier dominated; however, Fe doping also reduces the carrier density and mobility. The angle dependent quantum oscillations of Sb1.96Fe0.04Te3 were ...


Approaching High-Performance Potassium-Ion Batteries Via Advanced Design Strategies And Engineering, Wenchao Zhang, Yajie Liu, Zaiping Guo Jan 2019

Approaching High-Performance Potassium-Ion Batteries Via Advanced Design Strategies And Engineering, Wenchao Zhang, Yajie Liu, Zaiping Guo

Australian Institute for Innovative Materials - Papers

Potassium-ion batteries (PIBs) have attracted tremendous attention due to their low cost, fast ionic conductivity in electrolyte, and high operating voltage. Research on PIBs is still in its infancy, however, and achieving a general understanding of the drawbacks of each component and proposing research strategies for overcoming these problems are crucial for the exploration of suitable electrode materials/electrolytes and the establishment of electrode/ cell assembly technologies for further development of PIBs. In this review, we summarize our current understanding in this field, classify and highlight the design strategies for addressing the key issues in the research on PIBs, and ...


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 ...


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 ...


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

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

Australian Institute for Innovative Materials - Papers

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


Electrochemical Impacts Of Sheet-Like Hafnium Phosphide And Hafnium Disulfide Catalysts Bonded With Reduced Graphene Oxide Sheets For Bifunctional Oxygen Reactions In Alkaline Electrolytes, Mayilvel Meganathan, Taizhong Huang, Hengyi Fang, Jianfeng Mao, Guoxin Sun Jan 2019

Electrochemical Impacts Of Sheet-Like Hafnium Phosphide And Hafnium Disulfide Catalysts Bonded With Reduced Graphene Oxide Sheets For Bifunctional Oxygen Reactions In Alkaline Electrolytes, Mayilvel Meganathan, Taizhong Huang, Hengyi Fang, Jianfeng Mao, Guoxin Sun

Australian Institute for Innovative Materials - Papers

Non-noble metal-based catalysts with efficient catalytic activities for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are critical for energy conversion devices, including fuel cells and metal–air batteries. In this work, novel hafnium phosphide-reduced graphene oxide nanosheets (HfP-rGO NS) and hafnium disulfide-reduced graphene oxide nanosheets (HfS2-rGO NS) were synthesized and investigated as bifunctional electrocatalysts for OER and ORR. The prepared HfP-rGO NS and HfS2-rGO NS catalysts showed nanosheet structures, where the HfP or HfS2 nanosheet was closely packed with rGO. A unique methodology was adopted to lodge the non-metal oxide catalytic sheets (i.e., HfP and HfS2 ...


Rapid Fabrication Of Diffusion Barrier Between Metal Electrode And Thermoelectric Materials Using Current-Controlled Spark Plasma Sintering Technique, Xavier Reales Ferreres, Sima Aminorroaya-Yamini Jan 2019

Rapid Fabrication Of Diffusion Barrier Between Metal Electrode And Thermoelectric Materials Using Current-Controlled Spark Plasma Sintering Technique, Xavier Reales Ferreres, Sima Aminorroaya-Yamini

Australian Institute for Innovative Materials - Papers

A continuous, stable diffusion barrier between PbTe thermoelectric material and Ni conducting electrode was generated using the current-controlled spark plasma sintering technique. This new method creates a diffusion barrier layer by utilising the melt generated in the area of contact between components, also called the weld nugget in a resistance spot welding process. The current-controlled spark plasma sintering process bonds the solid workpieces in a fraction of the time required to fabricate interphase layers using powder components with the common temperature-controlled spark plasma sintering. The substantially reduced time of bonding compared to previous methods is beneficial to the thermoelectric properties ...


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 ...


Manipulation Of The Electronic Transport Properties Of Charge-Transfer Oxide Thin Films Of Ndni O3 Using Static And Electric-Field-Controllable Dynamic Lattice Strain, Jian-Min Yan, Meng Xu, Ting-Wei Chen, Ming Yang, Fei Liu, Hui Wang, Lei Guo, Zhi-Xue Xu, Fang-Yuan Fan, Guan-Yin Gao, Si-Ning Dong, Xiao-Guang Li, Hao Luo, Weiyao Zhao, Ren-Kui Zheng Jan 2019

Manipulation Of The Electronic Transport Properties Of Charge-Transfer Oxide Thin Films Of Ndni O3 Using Static And Electric-Field-Controllable Dynamic Lattice Strain, Jian-Min Yan, Meng Xu, Ting-Wei Chen, Ming Yang, Fei Liu, Hui Wang, Lei Guo, Zhi-Xue Xu, Fang-Yuan Fan, Guan-Yin Gao, Si-Ning Dong, Xiao-Guang Li, Hao Luo, Weiyao Zhao, Ren-Kui Zheng

Australian Institute for Innovative Materials - Papers

Using perovskite-type charge-transfer oxide thin films of NdNiO3 (NNO) as a model system, we demonstrate that the effects of lattice strain on the electronic transport properties can be more comprehensively understood by growing NNO films on a number of (001)-, (011)-, and (111)-cut single-crystal substrates with different lattice mismatches including the relaxor-based 0.31Pb(In1/2Nb1/2)O3-0.35Pb(Mg1/3Nb2/3)O3-0.34PbTiO3 (PIN-PMN-PT) and 0.71Pb(Mg1/3Nb2/3)O3-0.29PbTiO3 (PMN-PT) ferroelectric (FE) single crystals. In addition to the static lattice strains from conventional substrates (e.g., SrTiO3, LaAlO3), we in situ impose in-plane compressive or ...


Actuator Materials: Review On Recent Advances And Future Outlook For Smart Textiles, Dharshika Kongahage, Javad Foroughi Jan 2019

Actuator Materials: Review On Recent Advances And Future Outlook For Smart Textiles, Dharshika Kongahage, Javad Foroughi

Australian Institute for Innovative Materials - Papers

Smart textiles based on actuator materials are of practical interest, but few types have been commercially exploited. The challenge for researchers has been to bring the concept out of the laboratory by working out how to build these smart materials on an industrial scale and permanently incorporate them into textiles. Smart textiles are considered as the next frontline for electronics. Recent developments in advance technologies have led to the appearance of wearable electronics by fabricating, miniaturizing and embedding flexible conductive materials into textiles. The combination of textiles and smart materials have contributed to the development of new capabilities in fabrics ...


Magnetism-Mediated Thermoelectric Performance Of The Cr-Doped Bismuth Telluride Tetradymite, J Vaney, Sima Aminorroaya-Yamini, H Takaki, Kazuaki Kobayashi, N Kobayashi, Taizo Mori Jan 2019

Magnetism-Mediated Thermoelectric Performance Of The Cr-Doped Bismuth Telluride Tetradymite, J Vaney, Sima Aminorroaya-Yamini, H Takaki, Kazuaki Kobayashi, N Kobayashi, Taizo Mori

Australian Institute for Innovative Materials - Papers

Enhancing the efficiency of thermoelectric materials has been practiced extensively by either improving the power factor or reducing the lattice thermal conductivity. Magnetism, and the magnetic moment-charged carrier interactions, has been suggested to enhance the efficiency of some compounds. Nevertheless, decoupling of the magnetic and the carrier concentration-related effects has never been achieved to prove once and for all, the importance of magnetism in thermoelectricity. Herein, we report improved quality criterion of bismuth telluride upon chromium substitution. The magnetic interactions with the magnetic moment carried by Cr atoms have increased the electrons' effective mass, enhancing the thermopower. Combined with the ...


Enhancing Oxygen Evolution Efficiency Of Multiferroic Oxides By Spintronic And Ferroelectric Polarization Regulation, Xiaoning Li, Huan Liu, Zezhi Chen, Qingmei Wu, Zheyin Yu, Mengmeng Yang, Xiaolin Wang, Zhenxiang Cheng, Zhengping Fu, Yalin Lu Jan 2019

Enhancing Oxygen Evolution Efficiency Of Multiferroic Oxides By Spintronic And Ferroelectric Polarization Regulation, Xiaoning Li, Huan Liu, Zezhi Chen, Qingmei Wu, Zheyin Yu, Mengmeng Yang, Xiaolin Wang, Zhenxiang Cheng, Zhengping Fu, Yalin Lu

Australian Institute for Innovative Materials - Papers

Regulating the electronic structure of catalysts is the most efficient strategy yet, despite its limitations, to improve their oxygen evolution efficiency. Instead of only adjusting the electronic structure, here we utilize ferroelectric polarization to accelerate the oxygen evolution reaction as well. This is demonstrated on a multiferroic layered perovskite Bi 5 CoTi 3 O 15 with in-situ grown BiCoO 3 . Thanks to the superimposed effects of electronic regulation and ferroelectric polarization, the as-prepared multiferroic electrocatalysts are more efficient than the benchmark IrO 2 (with a final 320 mV overpotential at the current density of 10 mA cm −2 and a ...


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

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

Australian Institute for Innovative Materials - Papers

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


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

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

Australian Institute for Innovative Materials - Papers

Unlike monolayer Fe-Chalcogenide (Fe-Ch)/SrTiO3 (STO), which possesses the potential for high-temperature superconductivity (HTS), a regular Fe-Ch thin film grown on a non-STO substrate by the pulsed laser deposition method shows totally different superconducting behavior and a different mechanism. Although regular Fe-Ch thick films grown on CaF2 generally show the highest superconducting transition temperature (Tc) compared with any other substrates, the disappearance of superconductivity always takes place when the thickness of the Fe-Ch film is reduced to a critical value (∼20nm for Fe-Se and ∼30nm for Fe-Se-Te) with the reason still under debate. Here, we report an enhanced Tc≈17 ...


Dielectric And Piezoelectric Properties Of Textured Lead-Free Na0.5bi0.5tio3-Based Ceramics, Nannan Dong, Xiaoyi Gao, Fangquan Xia, Hanxing Liu, Hua Hao, Shujun Zhang Jan 2019

Dielectric And Piezoelectric Properties Of Textured Lead-Free Na0.5bi0.5tio3-Based Ceramics, Nannan Dong, Xiaoyi Gao, Fangquan Xia, Hanxing Liu, Hua Hao, Shujun Zhang

Australian Institute for Innovative Materials - Papers

This work provides a comparative study of the dielectric and piezoelectric properties of randomly oriented and textured 0.88Na 0.5 Bi 0.5 TiO 3 -0.08K 0.5 Bi 0.5 TiO 3 -0.04BaTiO 3 (88NBT) ceramics. Textured ceramics were fabricated by template grain growth (TGG) method using NaNbO 3 (NN) for templates. For textured ceramics with 4 wt% NN templates, a Lotgering factor of 96% and piezoelectric coefficient d 33 of 185 pC/N were obtained. Compared to the randomly oriented ceramics, textured ceramics show lower strain hysteresis (H = 7.6%), higher unipolar strain of 0 ...


New Insights Into The Relationship Between Draw Solution Chemistry And Trace Organic Rejection By Forward Osmosis, Lei Zheng, William E. Price, James A. Mcdonald, Stuart J. Khan, Takahiro Fujioka, Long D. Nghiem Jan 2019

New Insights Into The Relationship Between Draw Solution Chemistry And Trace Organic Rejection By Forward Osmosis, Lei Zheng, William E. Price, James A. Mcdonald, Stuart J. Khan, Takahiro Fujioka, Long D. Nghiem

Australian Institute for Innovative Materials - Papers

This study elucidates the impact of draw solution chemistry (in terms of pH and draw solute species) and membrane fouling on water flux and the rejection of trace organic contaminants by forward osmosis. The results show that draw solution chemistry could induce a notable impact on both water flux and TrOCs rejection. In addition, the impact was further influenced by membrane fouling. The reverse flux of proton (or hydroxyl) could alter the feed solution pH, which governed the separation of ionisable TrOCs. In addition, charged compounds generally exhibited higher rejections than neutral ones by the clean membrane. Electrostatic interaction, rather ...


Efficient Photocatalytic Hydrogen Peroxide Production Over Tio2 Passivated By Sno2, Guifu Zuo, Bingdong Li, Zhaoliang Guo, Liang Wang, Fan Yang, Weishu Hou, Songtao Zhang, Peixiao Zong, Shanshan Liu, Xianguang Meng, Yi Du, Tao Wang, Vellaisamy A. L Roy Jan 2019

Efficient Photocatalytic Hydrogen Peroxide Production Over Tio2 Passivated By Sno2, Guifu Zuo, Bingdong Li, Zhaoliang Guo, Liang Wang, Fan Yang, Weishu Hou, Songtao Zhang, Peixiao Zong, Shanshan Liu, Xianguang Meng, Yi Du, Tao Wang, Vellaisamy A. L Roy

Australian Institute for Innovative Materials - Papers

Photocatalysis provides an attractive strategy for synthesizing H2O2 at ambient condition. However, the photocatalytic synthesis of H2O2 is still limited due to the inefficiency of photocatalysts and decomposition of H2O2 during formation. Here, we report SnO2-TiO2 heterojunction photocatalysts for synthesizing H2O2 directly in aqueous solution. The SnO2 passivation suppresses the complexation and decomposition of H2O2 on TiO2. In addition, loading of Au cocatalyst on SnO2-TiO2 heterojunction further improves the production of H2O2. The in situ electron spin resonance study revealed that the formation of H2O2 is a stepwise single electron oxygen reduction reaction (ORR) for Au and SnO2 modified TiO2 ...


Challenges And Prospects In The Catalysis Of Electroreduction Of Nitrogen To Ammonia, Bryan H. R Suryanto, Hoang-Long Du, Dabin Wang, Jun Chen, Alexandr N. Simonov, Douglas R. Macfarlane Jan 2019

Challenges And Prospects In The Catalysis Of Electroreduction Of Nitrogen To Ammonia, Bryan H. R Suryanto, Hoang-Long Du, Dabin Wang, Jun Chen, Alexandr N. Simonov, Douglas R. Macfarlane

Australian Institute for Innovative Materials - Papers

Ammonia is a widely produced chemical that is the basis of most fertilisers. However, it is currently derived from fossil fuels and there is an urgent need to develop sustainable approaches to its production. Ammonia is also being considered as a renewable energy carrier, allowing efficient storage and transportation of renewables. For these reasons, the electrochemical nitrogen reduction reaction (NRR) is currently being intensely investigated as the basis for future mass production of ammonia from renewables. This Perspective critiques current steps and miss-steps towards this important goal in terms of experimental methodology and catalyst selection, proposing a protocol for rigorous ...


Competition Between Cubic And Tetragonal Phasesin All-D-Metal Heusler Alloys, X2-Xmn1+Xv (X= Pd, Ni, Pt, Ag, Au, Ir, Co; X= 1, 0): A New Potential Direction Of The Heusler Family, Yilin Han, Mengxin Wu, Yu Feng, Zhenxiang Cheng, Tingting Lin, Tie Yang, Rabah Khenata, Xiaotian Wang Jan 2019

Competition Between Cubic And Tetragonal Phasesin All-D-Metal Heusler Alloys, X2-Xmn1+Xv (X= Pd, Ni, Pt, Ag, Au, Ir, Co; X= 1, 0): A New Potential Direction Of The Heusler Family, Yilin Han, Mengxin Wu, Yu Feng, Zhenxiang Cheng, Tingting Lin, Tie Yang, Rabah Khenata, Xiaotian Wang

Australian Institute for Innovative Materials - Papers

In this work, a series of all-d-metal Heusler alloys, X 2 - x Mn 1 + x V (X = Pd, Ni, Pt, Ag, Au, Ir, Co; x; = 1, 0), were predicted by first principles. The series can be roughly divided into two categories: XMn 2 V (Mn-rich type) and X 2 MnV (Mn-poor type). Using optimized structural analysis, it is shown that the ground state of these all-d-metal Heusler alloys does not fully meet the site-preference rule for classic full-Heusler alloys. All the Mn-rich type alloys tend to form the L2 1 structure, where the two Mn atoms prefer to occupy the ...


Thermoelectric Performance Of Single-Phase Tellurium-Reduced Quaternary (Pbte)0.55(Pbs)0.1(Pbse)0.35, Laaya Shaabani, Graeme Blake, Andrew Manettas, Shokat Keshavarzi, Sima Aminorroaya-Yamini Jan 2019

Thermoelectric Performance Of Single-Phase Tellurium-Reduced Quaternary (Pbte)0.55(Pbs)0.1(Pbse)0.35, Laaya Shaabani, Graeme Blake, Andrew Manettas, Shokat Keshavarzi, Sima Aminorroaya-Yamini

Australian Institute for Innovative Materials - Papers

Lead chalcogenide quaternary systems have been shown to provide high thermoelectric (TE) efficiency superior to those of binary andternary lead chalcogenides, arising from both altered electronic band structures and a reduction in lattice thermal conductivity. Here, we have synthesized single-phase samples of the quaternary compound (PbTe)0.55(PbS)0.1(PbSe)0.35 dopedwith Na and characterized their TE properties. We show that the dopant solubility is limited to 1 at. %. A very low lattice thermal conductivity of∼0.6 Wm−1K−1at 850 K is achieved at all dopant concentrations because of phonon scattering from point defects associated ...


Native Surface Oxides Featured Liquid Metals For Printable Self-Powered Photoelectrochemical Device, Yuqing Wang, Yaqi Li, Jingwei Zhang, Jincheng Zhuang, Long Ren, Yi Du Jan 2019

Native Surface Oxides Featured Liquid Metals For Printable Self-Powered Photoelectrochemical Device, Yuqing Wang, Yaqi Li, Jingwei Zhang, Jincheng Zhuang, Long Ren, Yi Du

Australian Institute for Innovative Materials - Papers

Constructing high-performance photo-electrodes by patterning the photo-active semiconducting components with desirable texture and architecture is one of the most promising approaches to achieve the practical and scale-up application of photo-electric or photoelectrochemical (PEC) devices. However, it is a still big challenge to efficiently and effectively handle nano-structural semiconducting materials into intergraded circuit devices, displaying good electric-contact and stability. Here, a facile manufacture strategy for fabricating native metal-oxides based photo-electrodes by directly printing Ga-based liquid metals is explored. The PEC device, functionalized by the native Ga-oxide functional layer, exhibits self-powered photo-detection behaviors and presents fast photo-electric responsibility in response to the ...


Strategies For Neural Control Of Prosthetic Limbs: From Electrode Interfacing To 3d Printing, Catherine G.Y. Ngan, Robert M. I Kapsa, Peter Choong Jan 2019

Strategies For Neural Control Of Prosthetic Limbs: From Electrode Interfacing To 3d Printing, Catherine G.Y. Ngan, Robert M. I Kapsa, Peter Choong

Australian Institute for Innovative Materials - Papers

Limb amputation is a major cause of disability in our community, for which motorised prosthetic devices offer a return to function and independence. With the commercialisation and increasing availability of advanced motorised prosthetic technologies, there is a consumer need and clinical drive for intuitive user control. In this context, rapid additive fabrication/prototyping capacities and biofabrication protocols embrace a highly-personalised medicine doctrine that marries specific patient biology and anatomy to high-end prosthetic design, manufacture and functionality. Commercially-available prosthetic models utilise surface electrodes that are limited by their disconnect between mind and device. As such, alternative strategies of mind-prosthetic interfacing have ...


Sheath-Run Artificial Muscles, Jiuke Mu, Monica Jung De Andrade, Shaoli Fang, Xuemin Wang, Enlai Gao, Na Li, Shi Hyeong Kim, Hongzhi Wang, Chengyi Hou, Qinghong Zhang, Meifang Zhu, Dong Qian, Hongbing Lu, Dharshika Kongahage, Sepehr Talebian, Javad Foroughi, Geoffrey M. Spinks, Hyun Kim, Taylor H. Ware, Hyeon Jun Sim, Dong Yeop Lee, Yongwoo Jang, Seon Jeong Kim, Ray H. Baughman Jan 2019

Sheath-Run Artificial Muscles, Jiuke Mu, Monica Jung De Andrade, Shaoli Fang, Xuemin Wang, Enlai Gao, Na Li, Shi Hyeong Kim, Hongzhi Wang, Chengyi Hou, Qinghong Zhang, Meifang Zhu, Dong Qian, Hongbing Lu, Dharshika Kongahage, Sepehr Talebian, Javad Foroughi, Geoffrey M. Spinks, Hyun Kim, Taylor H. Ware, Hyeon Jun Sim, Dong Yeop Lee, Yongwoo Jang, Seon Jeong Kim, Ray H. Baughman

Australian Institute for Innovative Materials - Papers

Although guest-filled carbon nanotube yarns provide record performance as torsional and tensile artificialmuscles, they are expensive, and only part of themuscle effectively contributes to actuation.We describe a muscle type that provides higher performance, in which the guest that drives actuation is a sheath on a twisted or coiled core that can be an inexpensive yarn. This change from guest-filled to sheath-run artificial muscles increases the maximum work capacity by factors of 1.70 to 2.15 for tensile muscles driven electrothermally or by vapor absorption. A sheath-run electrochemical muscle generates 1.98 watts per gram of average contractile power-40 ...