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International Conference on Artificial Intelligence, Management Science and Electronic Commerce (AIMSEC)

作者： Chen Bo Sun Zhen-Ya Li Ming-Fa Wang Shan-Yu Fan Duan Institute of High Temperature and High Pressure Physics Wuhan University of Technology Wuhan China State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Wuhan China

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Facile synthesis of Uniform Hollow Hematite Sub-micro Spheres with Controllable Shell Thickness

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Journal of Wuhan University of technology(materials Science) 2010年第1期25卷 32-38页

作者：闫共芹官建国 State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

A simple method was developed to prepare the uniform hematite hollow submicro-spheres with controllable structure and different diameter based on monodisperse poly（styrene-co-acrylic acid） [P（St-co-AA）] particles. The structure and formation mechanism of the hollow spheres were investigated in detail. The control mechanism of shell thickness was also discussed. The results indicated that the shell thickness and coarseness of the synthesized core-shell hematite hollow spheres could be tuned simply by the surface carboxyl content of the P（St-co-AA） particles. This method provided a new approach for the structure control in the preparation of hollow spheres. A Brunauer-Emmett-Teller （BET） test shows that the prepared hollow spheres have large surface areas which were decreased along with the increase of the diameter. The magnetic properties of the as-obtained hematite hollow spheres were investigated. The result showed that the coercivity and saturated magnetization were increased along with the increase of the shell thickness, and the remanent magnetization was increased along with the decrease of the diameter.

关键词： hollow spheres hematite shell thickness BET special surface area magnetization properties

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Comparative catalytic effects of NiCl2,TiC and TiN on hydrogen storage properties of LiAlH4

Comparative catalytic effects of NiCl2,TiC and TiN on hydrog...

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第十一届国际材联亚洲材料大会

作者： Rafi-ud-din Mashkoor Ahmad State Key Laboratory for Advanced Metals and Materials School of Materials Science and Engineering University of Science and Technology Beijing Beijing National Center for Electron Microscopy The State Key Laboratory of New Ceramics and Fine Processing Laboratory of Advanced MaterialDepartment of Material Science and EngineeringTsinghua University

Catalytic effects of NiCl,TiC and TiN on the dehydrogenation/rehydrogenation characteristics of LiAlH were investigated by pressure -content-temperature(PCT),X-ray diffraction(XRD),differential scanning calorimatory(DSC),and field emission scanning electron microscopy(FESEM).The doped samples exhibit dehydrogenation at much lower *** with NiCl,TiC and TiN induce a decrease in the decomposition of first step by about 50-65℃compared to that of as received ***,amount of hydrogen release is significantly higher for TiC additions than that of samples doped with TiN and *** desorption results at 125℃reveal that dehydrating rate of doped alanate is much faster than that of pure ***,TiN and NiCl dopants show the reabsorption of about 1.9 wt.%, 1.3 wt.%,and 1.1 wt.%,*** and FESEM analyses suggest that both TiC and TiN are stable during the ball milling as well as the dehydrogenation *** the contrary,NiCl reacts and causes the partial decomposition of Li alanate during the ball milling process.

关键词： hydrogen storage materials complex hydrides lithium alanate（LiAlH4） mechanical（ball）milling TiC,TiN,NiCl2 desorption temperature and kinetics differential scanning calorimetry（DSC）

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Influence of oxygen content on hardness of Cr(N,O) thin films deposited by an RF sputtering method

Influence of oxygen content on hardness of Cr(N,O) thin film...

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International Symposium on Multifunctional Ceramic materials Based on Nanotechnology, ISMCN 2010

作者： Shirahata, J. Ohori, T. Asami, H. Suzuki, T. Nakayama, T. Suematsu, H. Lee, S.W. Fu, Z. Niihara, K. Extreme Energy-Density Research Institute Nagaoka University of Technology 1603-1 Kamitomioka Nagaoka 940-2188 Japan Department of Mechanical Engineering Tomakomai National College of Technology 433 Nishikioka Tomakomai 059-1275 Japan Department of Environmental Engineering Sun Moon University Chungnam 336-708 Korea Republic of State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Cr(N,O) thin films were deposited by radio frequency reactive unbalanced magnetron sputtering on Si(100) or glassy carbon substrates. In this paper, the influence of oxygen content on hardness of Cr(N,O) thin films was investigated. The compositional analysis was carried out by Rutherford backscattering spectroscopy. It was found that these thin films contained up to 44at.% of oxygen. Phases in the samples were determined by X-ray diffraction. Cr(N,O) thin films show only peaks based on CrN. The microstructure was observed by utilizing a transmission electron microscope. At

关键词： Thin films

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Preparation, Characterization and Dielectric Properties of Sr_5RTi_3Ta_7O_(30) (R=Pr and Eu) Ferroelectric Ceramics

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Journal of Wuhan University of technology(materials Science) 2010年第2期25卷 291-294页

作者：胡长征方亮 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Key Laboratory of Nonferrous Materials and New Processing Technology Ministry of Education Guilin University of Technology

Polycrystalline samples of Sr5PrTi3Ta7O30 （SPTT） and Sr5EuTi3Ta7O30 （SETT） compounds were prepared by high-temperature solid-state reaction method and their formation, structure and dielectric properties were studied. They are found to be ferroelectric phase of filled tetragonal tungsten bronze （TB） structure at room temperature and undergoes diffuse type of ferroelectric-paraelectric phase transition around 34 ℃ and 31 ℃, respectively. At 1 MHz SPTT exhibits high dielectric constants of 177 and low dielectric losses of 3.5×10^-4 and SETT has high dielectric constants of 125 and low dielectric losses of 2.4×10^-3.

关键词： dielectrics ceramic ferroelectric tungsten-bronze

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Fl–DFO [email protected] silica materials: Highly sensitive and selective nanosensor for dosing with iron ions

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Journal of Colloid and Interface Science 2011年第1期358卷 136-145页

作者： Bao-Lian Su Nicolas Moniotte Noan Nivarlet Li-Hua Chen Zheng-Yi Fu Jonathan Desmet Jing Li State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Hongshan Luoshi Road 430070 Wuhan China Laboratory of Inorganic Materials Chemistry (CMI) University of Namur (FUNDP) 61 rue de Bruxelles B-5000 Namur Belgium Fonds National de la Recherche Scientifique Rue d’Egmont 5 B-1000 Brussels Belgium

Highly sensitive and selective nanosensor for labile iron pool (LIP) determination, has been designed and prepared by immobilization of Fluoresceine–Desferrioxamine (Fl–DFO), a bifunctional fluoro-siderophore probe molecule with great affinity for iron ions (pK f = 30.7), into highly ordered mesoporous silica structure. Different immobilization methods of Fl–DFO molecules, such as their encapsulation in surfactant micelles used as templating agents for the synthesis of mesoporous silica, direct impregnation into the mesochannels of as-synthesized mesoporous silica and their surface anchoring by covalent binding with propylamine groups implanted by post-synthesis on the internal surface of mesochannels, have been explored. Each nanohybrid has been fully characterized by small angle XRD, TEM, SEM, solid state 29 Si and 13 C MAS NMR and N 2 adsorption–desorption. The fluorescence properties of nanohybrids obtained have been correlated with the immobilization methods, generating interesting information concerning the localization of Fl–DFO molecules in the channels of mesoporous silica. The leaching of Fl–DFO molecules from mesoporous materials has been investigated. The nanosensor prepared by surface anchoring of Fl–DFO at the internal surface of mesochannels showed high performances with no leaching effect and high sensitivity in regards to its responses to ferric ions. Its fluorescence intensity decreased as soon as first Fe III ions are in contact with this nanosensor. A linear relationship between the fluorescence intensity and the ferric ions concentration was observed in low micromolar range. The selectivity of this nanosensor towards other metal ions has also been tested and shown its high affinity to ferric ions. This study can allow the design of a stable, portable, simple, regenerable and cost-effective nanosensor highly sensitive and selective for iron ions with detection limits in the range of cellular LIP in cells, e.g. lower micromolar range.

关键词： Fluoresceine–Desferrioxamine (Fl–DFO) Sensor molecule Mesoporous silica Nanosensor Dosing with iron ions

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Thermal conductive and electrical properties of polyurethane/hyperbranched poly(urea-urethane)-grafted multi-walled carbon nanotube composites

Thermal conductive and electrical properties of polyurethane...

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作者： Zhao, Jin-Chao Du, Fei-Peng Zhou, Xing-Ping Cui, Wei Wang, Xiao-Mei Zhu, Hong Xie, Xiao-Lin Mai, Yiu-Wing State Key Laboratory of Material Processing and Die and Mould Technology School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan 430074 China 712th Research Institute CSIC Wuhan 430064 China Centre for Advanced Materials Technology School of Aerospace Mechanical and Mechatronic Engineering J07 University of Sydney Sydney NSW 2006 Australia

Hyperbranched poly(urea-urethane)-grafted multi-walled carbon nanotubes (HPU-MWCNTs) were incorporated in a polyurethane (PU) matrix based on poly(ethylene oxide-tetrahydrofuran) and aliphatic polyisocyanate resin as curing agent. The 9-12 nm thick HPU shell formed on the MWCNTs improved the dispersion of MWCNTs and enhanced the interfacial adhesion between the PU matrix and MWCNTs, leading to improvements in storage modulus and Tg of the composites and enhancement of the thermal stability of PU. Thus, composites with 0.5-1 wt% MWCNTs increased the thermal conductivity by about 60-70% when compared to, and retained the high electrical resistivity of, neat PU. © 2011 Elsevier Ltd. All rights reserved.

关键词： Polyurethanes

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Polyaniline nanoparticles for supercapacitor prepared by using polystyrene microsphere as carrier

Polyaniline nanoparticles for supercapacitor prepared by usi...

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International Conference on Remote Sensing, Environment and Transportation Engineering (RSETE)

作者： Yong-Tao Tan Fen Ran Ling-Ren Wang Ling-Bin Kong Long Kang Key Laboratory of Non-ferrous Metal Alloys and Processing of Ministry of Education Lanzhou University of Technology Lanzhou China State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials Lanzhou University of Technology 730050 China

Polyaniline nanopaticles for supercapacitor were prepared by using polystyrene microsphere as carrier. They were characterized by FTIR, SEM and TGA for structure and electrochemical station for supercapacitive performance. The results show that, the polystyrene-polyaniline composite, about 4∼5 µm, keep the microsphere structure of polystyrene, and was covered on its surface with polyaniline nanoparticle of about 50 nm. The composite shows excellent supercapacitive performance. Increasing the fraction of PANI/PS-PANI (w) result in an increase of capacitance of PS-PANI composite, and a maximum specific capacitance was 275 F/g, and capacitance of polyaniline first increased, then decreased. When w was 0.44, capacitance was a maximum capacitance of 498 F/g.

关键词： Polymers Supercapacitors Capacitance Nanoparticles Dispersion Metals Physics

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Photochromic Azo Polysemicarbazides with Biocompatibility Behavior

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Journal of Wuhan University of technology(materials Science) 2010年第6期25卷 979-983页

作者：刘芸熊传溪 School of Materials Science and Engineering Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Two kinds of azo polysemicarbazides were prepared based on 3,3＇-azobis（benzoylhydrazide）（ABH） and two kinds of diisocyanates via solution *** structures were characterized by Fourier-transform infrared（FT-IR） technique and elemental *** viscosities of the polymers were 0.32 and 0.29 dL/g and both could be dissolved in H2SO4 and polar organic *** gravimetric analysis（TGA） presented a multi-step degradation and a decomposition temperature range of 230-280 ℃.And photoisomerization of the azo polymers in solvent of N,N-dimethyl acetamide（DMAc） was confirmed by Ultraviolet-visible spectroscopy（UV-Vis）,suggested the isomerization appearing under the ultraviolet irradiation at 365 nm and recovering completely by visible light irradiation or kept in the *** electron microscopy（TEM） of polysemicarbazides before and after soaking in bovine serum albumin（BSA） solution confirmed the biocompatibility of azo polymers.

关键词： azo polysemicarbazides isomerization photochromism biocompatibility

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Mode-locked operation of an erbium-doped fiber laser using a self-assembled graphene membrane after excitation of Q-switched pulse

Mode-locked operation of an erbium-doped fiber laser using a...

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Conference on Lasers and Electro-Optics Europe (CLEO EUROPE)

作者： Lili Gui Wei Zhang Xiao Li Xiaosheng Xiao Hongwei Zhu Kunlin Wang Dehai Wu Changxi Yang State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision Instruments Tsinghua University Beijing China Key Laboratory for Advanced Manufacturing by Materials Processing Technology Department of Mechanical Engineering Tsinghua University Beijing China

We demonstrate that a self-assembled graphene membrane can be used to mode-lock a fiber laser reliably. The membrane is formed at the liquid/air interface of reduced graphene oxide solution. The membrane was transferr... 详细信息

ISBN: (纸本)9781457705328

关键词： Laser mode locking Pump lasers

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