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Full-Text Articles in Physical Sciences and Mathematics
Ferroelectric And Magnetic Properties Of Aurivillius Bim+1ti3fem−3o3m+3 Thin Films, Tingting Jia, Hideo Kimura, Zhenxiang Cheng, Hongyang Zhao
Ferroelectric And Magnetic Properties Of Aurivillius Bim+1ti3fem−3o3m+3 Thin Films, Tingting Jia, Hideo Kimura, Zhenxiang Cheng, Hongyang Zhao
Australian Institute for Innovative Materials - Papers
Aurivillius Bim+1Ti3Fem−3O3m+3 (m = 4, 5, 6) thin films have been deposited by a pulsed laser deposition system. The x-ray diffraction patterns indicate the formation of orthorhombic phase. The remanent polarization (2Pr) of Bim+1Ti3Fem−3O3m+3 thin films is decreased with the m-number. Positive-up-negative-down measurements indicate the presence of ferroelectric (FE) polarization in as-obtained thin films. Piezoresponse force microscopy investigations confirm the existence of FE domains and the switchable polarization. Weak magnetic moment is detected in the Aurivillius films at room temperature. The present work …
Modulation Of Photocatalytic Properties By Strain In 2d Biobr Nanosheets, Haifeng Feng, Zhongfei Xu, Liang Wang, Youxing Yu, David R. G Mitchell, Dandan Cui, Xun Xu, Ji Shi, Takumi Sannomiya, Yi Du, Weichang Hao, S X. Dou
Modulation Of Photocatalytic Properties By Strain In 2d Biobr Nanosheets, Haifeng Feng, Zhongfei Xu, Liang Wang, Youxing Yu, David R. G Mitchell, Dandan Cui, Xun Xu, Ji Shi, Takumi Sannomiya, Yi Du, Weichang Hao, S X. Dou
Australian Institute for Innovative Materials - Papers
BiOBr nanosheets with highly reactive {001} facets exposed were selectively synthesized by a facile hydrothermal method. The inner strain in the BiOBr nanosheets has been tuned continuously by the pH value. The photocatalytic performance of BiOBr in dye degradation can be manipulated by the strain effect. The low-strain BiOBr nanosheets show improved photocatalytic activity. Density functional calculations suggest that strain can modify the band structure and symmetry in BiOBr. The enhanced photocatalytic activity in low-strain BiOBr nanosheets is due to improved charge separation attributable to a highly dispersive band structure with an indirect band gap.
An Investigation Of The Nanomechanical Properties Of 0.5ba(Ti0.8zr0.2)O3-0.5(Ba0.7ca0.3)Tio3 Thin Films, Zhong-Lan Cai, Zeng-Mei Wang, Huan-Huan Wang, Zhenxiang Cheng, Baowen Li, Xin-Li Guo, Hideo Kimura, Akira Kasahara
An Investigation Of The Nanomechanical Properties Of 0.5ba(Ti0.8zr0.2)O3-0.5(Ba0.7ca0.3)Tio3 Thin Films, Zhong-Lan Cai, Zeng-Mei Wang, Huan-Huan Wang, Zhenxiang Cheng, Baowen Li, Xin-Li Guo, Hideo Kimura, Akira Kasahara
Australian Institute for Innovative Materials - Papers
For practical application, the functional piezoelectric film in microelectromechanical systems should meet the requirement of physical properties, as well as the mechanical properties. In this article, 0.5Ba(Ti0.8Zr0.2)O3-0.5(Ba0.7Ca0.3)TiO3 (0.5BZT-0.5BCT) thin films with varied properties were prepared on (100) Si substrates via a sol-gel technique at different annealing temperatures. The effects of the annealing temperature on the morphology, piezoelectricity, hardness, and elastic modulus were studied. Particular attention was paid to the surface frictional behavior of films, and the changes in the friction force can be radically explained in terms of differences in the hardness/elastic modulus ratio and the residual stress of films. …
Anomalies In Magnetoelastic Properties Of Dyfe11.2nb0.8 Compound, Jianli Wang, M F. Md Din, Shane J. Kennedy, Zhenxiang Cheng, Stewart J. Campbell, Justin A. Kimpton, S X. Dou
Anomalies In Magnetoelastic Properties Of Dyfe11.2nb0.8 Compound, Jianli Wang, M F. Md Din, Shane J. Kennedy, Zhenxiang Cheng, Stewart J. Campbell, Justin A. Kimpton, S X. Dou
Australian Institute for Innovative Materials - Papers
The structural and magnetic properties of DyFe11.2Nb0.8 compound have been investigated by high intensity, high resolution synchrotron x-ray diffraction, ac magnetic susceptibility, and dc magnetization measurements as well as Mössbauer spectroscopy (5-300 K). The easy magnetization direction at room temperature is along the c-axis. With decreasing temperature, the magnetocrystalline anisotropy changes from easy-axis to easy-cone at Tsr2 (∼202 K), then to easy plane at Tsr1 (∼94 K). The thermal expansion coefficient obtained from the synchrotron x-ray study exhibits clear anomalies around both of the spin reorientation transition temperatures. The 57Fe hyperfine interaction parameters and …
A Facile Method To Enhance Ferroelectric Properties In Pvdf Nanocomposites, Mohammad Mahdi Abolhasani, Fatemeh Zarejousheghani, Zhenxiang Cheng, Minoo Naebe
A Facile Method To Enhance Ferroelectric Properties In Pvdf Nanocomposites, Mohammad Mahdi Abolhasani, Fatemeh Zarejousheghani, Zhenxiang Cheng, Minoo Naebe
Australian Institute for Innovative Materials - Papers
Poly(vinylidene fluoride) (PVDF)/nanoclay composites were prepared using melt compounding. The effect of acrylic rubber (ACM) as a compatibilizer on different polymorph formation and on the ferroelectric properties of nanocomposites were investigated. The intercalation and morphological structure of the samples were studied using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The infrared spectroscopy and X-ray analysis revealed the coexistence of beta and gamma crystalline forms in PVDF-clay nanocomposite, while in partially miscible PVDF/ACM/clay hybrids, three polymorphs of alpha, beta and g coexisted. The coefficients of electric field-polarization (E-P) Taylor expansion were calculated based on the Lorentz theory. Using a genetic …
Influence Of Biopolymer Loading On The Physiochemical And Electrochemical Properties Of Inherently Conducting Polymer Biomaterials, Paul J. Molino, Peter C. Innis, Michael J. Higgins, Robert M. I Kapsa, Gordon G. Wallace
Influence Of Biopolymer Loading On The Physiochemical And Electrochemical Properties Of Inherently Conducting Polymer Biomaterials, Paul J. Molino, Peter C. Innis, Michael J. Higgins, Robert M. I Kapsa, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
The physicochemical and electrochemical properties of polypyrrole (PPy) doped with the biological dopant dextran sulphate (DS) were shown to be significantly altered as a function of varying the salt concentration (0.2, 2 or 20 mg/ml) in the polymerisation electrolyte. Films grown in the presence of 0.2 mg/ml DS generated the highest potential during galvanostatic growth, with the potential decreasing with each subsequent increase in DS concentration. The electroactivity of the polymers was similar for all three DS concentrations, with the 20 mg/ml film drawing slightly more current upon reduction in PBS. Increasing the DS concentration reduced film interfacial roughness and …
Sodium And Lithium Storage Properties Of Spray-Dried Molybdenum Disulfide-Graphene Hierarchical Microspheres, Sujith Kalluri, Kuok Hau Seng, Zaiping Guo, Aijun Du, Konstantin K. Konstantinov, Hua-Kun Liu, S X. Dou
Sodium And Lithium Storage Properties Of Spray-Dried Molybdenum Disulfide-Graphene Hierarchical Microspheres, Sujith Kalluri, Kuok Hau Seng, Zaiping Guo, Aijun Du, Konstantin K. Konstantinov, Hua-Kun Liu, S X. Dou
Australian Institute for Innovative Materials - Papers
Developing nano/micro-structures which can effectively upgrade the intriguing properties of electrode materials for energy storage devices is always a key research topic. Ultrathin nanosheets were proved to be one of the potential nanostructures due to their high specific surface area, good active contact areas and porous channels. Herein, we report a unique hierarchical micro-spherical morphology of well-stacked and completely miscible molybdenum disulfide (MoS2) nanosheets and graphene sheets, were successfully synthesized via a simple and industrial scale spray-drying technique to take the advantages of both MoS2 and graphene in terms of their high practical capacity values and high …
Porous Amorphous Ge/C Composites With Excellent Electrochemical Properties, Xiu Li, Wei Guo, Qian Wan, Jianmin Ma
Porous Amorphous Ge/C Composites With Excellent Electrochemical Properties, Xiu Li, Wei Guo, Qian Wan, Jianmin Ma
Australian Institute for Innovative Materials - Papers
Porous amorphous germanium/carbon (Ge/C) composites, which were synthesized through the reduction/carbonization of germanium oxide/oleic acid precursors, could exhibit a high-capacity, high-rate and long-life performance due to the synergistic effect of the porous structure and carbon.