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Three dimensional profile for the valence electronic structure across the triple pocket junction in SrTiO3 ceramic

Journal of advanced Microscopy Research 2013年第2期8卷 128-136页

作者： Tan, Guo-Long State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

The three dimensional profile for valence electron structure across the triple pocket junction in SrTiO3 ceramic has been quantitatively determined by analysis of spatially resolved low loss electron energy-loss spectroscopy (EELS) data, which were collected from one front grain across the triple pocket junction to another backside grain by line scan technique. From the experimental data, local complex dielectric functions were determined, from which interband transition strength Jcv spectra can be locally analyzed. A three dimensional surface profile of the interband transition strength spectra across the triple pocket junction has been built up, the front view of which looks like a valley with a horse-hump shaped grooving gap across the triple pocket junction (TPJ). The dramatic change of the valence electronic structure across the triple pocket junction has been observed. The transition strength between the energy range of two major transition peaks at 28.9 eV (F ) and 47.3 eV (H) drops dramatically across the triple pocket junction, a new transition peak E at 15.3 eV appears. This new feature was corresponding to the interband transition relative to one of the splitting O 2s sub-bands of TiO2. The bulk plasmon excitation peak for SrTiO3 disappeared at the central point of the triple pocket junction, where a new plasmon resonance peak at 24.6 eV for TiO2 shows up. The disappearance of peak H at 47.4 eV and the occurrence of a new peak E suggest that TiO2 be the only component at the central point of the triple pocket junction. Copyright © 2013 American Scientific Publishers.

关键词： Perovskite

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Structures and properties of BiFeO3 thin films on Pt(111)/Ti/SiO2/Si substrates prepared by pulsed-laser deposition under various oxygen partial pressures

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2nd International Conference on Opto-Electronics Engineering and materials Research, OEMR 2013

作者： Yi, Mei Lin Wang, Chuan Bin Shen, Qiang Zhang, Lian Meng State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

ISBN: (纸本)9783037857731

Ferroelectric BiFeO3 (BFO) thin films were prepared on Pt(111)/Ti/SiO2/Si substrates by pulsed-laser deposition under various oxygen partial pressures (PO2). The effects of PO2 on the phase, orientation, surface morphology, and ferroelectric properties of the films were investigated, particularly in regard to relationships between structure and properties. It was found that the crystallographic orientation and surface morphology of the BFO thin films strongly depended on PO2. Films prepared at PO2=10 Pa had a high degree of (111) orientation and densely packed grains. A maximum of twice the remanent polarization for the BFO thin film was 68 μC/cm2. © (2013) Trans Tech Publications, Switzerland.

关键词： Pulsed laser deposition

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Fabrication of nano porous PVDF beads

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2nd International Conference on materials Science and Engineering, ICMSE 2013

作者： Luo, Dabing Tao, Yang Xiang, Bin Wang, Yanfei Liu, Hanxing State Key Lab of Advanced Technology for Materials' Synthesis and Processing Wuhan University of Technology Wuhan Hubei China

ISBN: (纸本)9783037856444

After dissolve PVDF in DMF, porous PVDF beads were prepared by water assistant. The porous beads were better crystallized and possessed greater relative surface than ordinary PVDF. The results suggested that the relative surface of PVDF reach 6.53m2/g while the dripping speed was 0.95ml/min. The material could rise to the modulator to fabricate nanometer fiber polymers. © (2013) Trans Tech Publications, Switzerland.

关键词： Fabrication

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High-temperature plasmonic thermal emitter for thermo-photovoltaics

High-temperature plasmonic thermal emitter for thermo-photov...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Jingjing Liu Urcan Guler Wei Li Alexander V. Kildishev Alexandra Boltasseva Vladimir M. Shalaev School of Electrical & Computer Eneineering and Birck Nanotechnology Center. Purdue Universitv. West Lafayette IN USA State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China Department of Photonics Engineering Technical University of Denmark Lyngby Denmark

We use titanium nitride (TiN) to demonstrate an ultra-thin plasmonic thermal emitter operating at high temperatures (830 K). The spectrally selective emitter exhibits a large emittance at around 2.5 μm and below, and... 详细信息

关键词： Tin Plasmons Absorption Thermal stability Wavelength measurement materials Photovoltaic cells

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Fabrication and mechanical properties of SiC/Cu composites with Zn addition by hot pressing sintering

Fabrication and mechanical properties of SiC/Cu composites w...

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Chinese materials Congress 2012, CMC 2012

作者： Liu, Huang Luo, Guoqiang Chen, Pingan Shen, Qiang Zhang, Lianmeng State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Key Laboratory of Advanced Technology for Specially Functional Materials Ministry of Education Wuhan University of Technology Wuhan 430070 China

ISBN: (纸本)9783037856079

SiC/Cu composites exhibit low density, low coefficient of thermal expansion and excellent mechanical properties. In this study, Zn of 2 wt. % was added as the sintering activator, and the high volume faction (60%) SiC/Cu composites was fabricated by hot pressing sintering technology. The phase composition and morphology of as-prepare samples were characterized by X-ray diffraction (XRD) system and scanning electron microscopy (SEM) equipped with an energy-dispersive spectroscopy (EDS) system. The as-prepared SiC/Cu composites were dense and uniform as well as void free. The results show that SiC/Cu composites can reach excellent mechanical properties of SiC/Cu composites. With the increase of sintering temperature, Vickers hardness and the bending strength of the samples increased obviously and the as-prepared SiC/Cu composites achieved a maximum Vickers hardness and bending strength respectively of 195MPa and 140MPa. © (2013) Trans Tech Publications, Switzerland.

关键词： Bending strength

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Antimony-doped SnO2 nanoparticles with controlled doping level via nonaqueous sol-gel procedure

Antimony-doped SnO2 nanoparticles with controlled doping lev...

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Chinese materials Congress 2012, CMC 2012

作者： Wu, Junyan Chen, Fei Shen, Qiang Zhang, Lianmeng State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Key Laboratory of Advanced Technology for Specially Functional Materials Ministry of Education Wuhan University of Technology Wuhan 430070 China

ISBN: (纸本)9783037856079

Antimony-doped tin oxide (ATO) nanoparticles with controlled doping level were prepared by a nonaqueous solution route, using alcohol as the solvent, citric acid as an agent, tin (IV) tetrachloride as tin source and antimony (III) chlorideas as antimony sources. As-synthesized samples were characterized by Thermogravimetric analysis (TGA), powder X-ray diffraction (XRD), transmission electron micrographs (TEM), N2 adsorption-desorption isotherms, and X-ray photoelectron spectroscopy (XPS). The results showed that the content of citric acid was the most important processing parameter which was largely governing the reaction course and the complete incorporation of Sb. When the citric acid to metal mol ratio was 2, the particles were the highly crystallized ATO nanoparticles of about 20nm and the Sb atoms were indeed incorporated into the SnO2 crystal structure (cassiterite SnO2). © (2013) Trans Tech Publications, Switzerland.

关键词： Sol-gels

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26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3 Antwerp, Belgium. 15-20 July 2017 Abstracts

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BMC NEUROSCIENCE 2017年第SUPPL 1期18卷 95-176页

作者： [Anonymous] Department of Neuroscience Yale University New Haven CT 06520 USA Department Physiology & Pharmacology SUNY Downstate Brooklyn NY 11203 USA NYU School of Engineering 6 MetroTech Center Brooklyn NY 11201 USA Departament de Matemàtica Aplicada Universitat Politècnica de Catalunya Barcelona 08028 Spain Institut de Neurobiologie de la Méditerrannée (INMED) INSERM UMR901 Aix-Marseille Univ Marseille France Center of Neural Science New York University New York NY USA Aix-Marseille Univ INSERM INS Inst Neurosci Syst Marseille France Laboratoire de Physique Théorique et Modélisation CNRS UMR 8089 Université de Cergy-Pontoise 95300 Cergy-Pontoise Cedex France Department of Mathematics and Computer Science ENSAT Abdelmalek Essaadi’s University Tangier Morocco Laboratory of Natural Computation Department of Information and Electrical Engineering and Applied Mathematics University of Salerno 84084 Fisciano SA Italy Department of Medicine University of Salerno 84083 Lancusi SA Italy Dipartimento di Fisica Università degli Studi Aldo Moro Bari and INFN Sezione Di Bari Italy Data Analysis Department Ghent University Ghent Belgium Coma Science Group University of Liège Liège Belgium Cruces Hospital and Ikerbasque Research Center Bilbao Spain BIOtech Department of Industrial Engineering University of Trento and IRCS-PAT FBK 38010 Trento Italy Department of Data Analysis Ghent University Ghent 9000 Belgium The Wellcome Trust Centre for Neuroimaging University College London London WC1N 3BG UK Department of Electronic Engineering NED University of Engineering and Technology Karachi Pakistan Blue Brain Project École Polytechnique Fédérale de Lausanne Lausanne Switzerland Departement of Mathematics Swansea University Swansea Wales UK Laboratory for Topology and Neuroscience at the Brain Mind Institute École polytechnique fédérale de Lausanne Lausanne Switzerland Institute of Mathematics University of Aberdeen Aberdeen Scotland UK Department of Integrativ

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Raw Ginger Composite Antioxidant with High Efficiency to Extract Vitamin C from Strawberry

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Advances in Chemical Engineering and Science 2013年第3期3卷 185-188页

作者： Yanhu Guo Yumin Zhang Dabing Luo Tao Ma State Key Lab of Advanced Technology for Materials’ Synthesis and Processing Wuhan University of Technology Wuhan China

Raw ginger was introduced to a series of composite antioxidants. The specimens performed better efficiency than ordinary antioxidants while extracting vitamin C from strawberry. The results suggested that, by employing raw ginger composite antioxidant, the reservation of vitamin C could be 91.63% in washing process and 76.68% in squeezing process respectively. Furthermore, in squeezing process, the reservation of vitamin C reached 84.78% while the concentrate of raw ginger antioxidant was 0.03%. The both deposits performed perfect synergy effectively. Raw ginger composite antioxidant could be the well agent to extract vitamin C from fruit.

关键词： Raw Ginger Composite Antioxidant Synergy Effective Strawberry Vitamin C

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Effect of Zn on microstructure and mechanical properties of AL-zn-Mg-Cu-Zr alloy by powder metallurgy

Effect of Zn on microstructure and mechanical properties of ...

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2013 International Conference on advanced Technologies and Solutions in Industry, ICATSI 2013

作者： Wu, Chuan Dong Li, Cheng Zhang Fang, Pan Luo, Guo Qiang Shen, Qiang State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Material Technology Institute of CVTC Dongfeng Motor CO.LTD Wuhan 430056 Hubei China

ISBN: (纸本)9783037857205

In this paper, full-density Al-Zn-Mg-Cu-Zr powder metallurgy(P/M) alloy is prepared by hot-press sintering in vacuum at 600°C. Experiments are conducted to evaluate the effects of Zn additive in the range of 7.2-8.4 wt.% on the microstructure and mechanical properties of Al-Zn-Mg-Cu-Zr alloys. X-ray diffraction(XRD), scanning electron microstructure(SEM) and electron probe micro-analyzer (EPMA), and mechanical properties such as tensile strength are measured. The porosity decreases gradually with increasing of Zn and it achieves 0.01% with a density of 2.95 g/cm3 at 8.4% Zn. The tensile strength reaches the maximal value of 436 MPa at 8.4% Zn. © (2013) Trans Tech Publications, Switzerland.

关键词： Aluminum alloys

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A simultaneous thermal study in quantitative analysis of calcium oxalate hydrates

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Analytical Methods 2013年第24期5卷 6900-6903页

作者： Fei, Tao Hao, Xie Bao-Lian, Su Department of Biological Science and Biotechnology School of Science Wuhan University of Technology 122 Luoshi Road 430070 Wuhan China Lab. of Living Mat. at State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road 430070 Wuhan China 61 rue de Bruxelles B-5000 Namur Belgium Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW United Kingdom

The potential use of simultaneous thermal technology has been explored for quantifying mixed calcium oxalate monohydrate and dihydrate, which are major mineral components of urinary stones. Based on the observation and theoretical analysis of thermal dehydration of calcium oxalates, an effective and simple method has been developed for quantitative analysis of calcium oxalate hydrates. The present approach would be useful in medical practice and in quantifying inorganic hydrates with water-containing crystals similar to calcium oxalate hydrates. © 2013 The Royal Society of Chemistry.

关键词： Hydrates

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