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Journal of Wuhan University of Technology(materials science) 2011年第2期26卷 263-269页

作者：王洪 Key laboratory of Textile science & Technology Ministry of EducationDonghua University

The properties of native silk fibroin （SF） solution in the gland of silkworms during the full fifth instar larval stage were examined in an attempt to elucidate the mechanism of natural silk spinning in the *** flow and gelation behavior,birefringence phenomenon,rheological properties,specific viscosity and conformation of SF solutions from the gland of silkworms were measured by polarized light microscope,HAKKE rheometer,Ubbelohde viscometer and solid-state 13C NMR,*** comparing their properties with regenerated SF solutions from natural silk fibers,it is believed that there exists a progressive maturation process favorable to spin silk fibers with excellent properties from native SF solution and a weak bonded and highly oriented SF gel network with SF molecules partly extended in α-helix conformation is formed in the middle section of the gland of *** suggests that a biomimetic maturation process for making spinnable solution might be necessary for artificial silk fiber spinning in order to obtain improved fiber properties.

关键词： silk fibre spin viscosity sol/gel

Separation of Red (Y_2._3:Eu^(3+)), Blue (BaMgAl_(10)O_(17):Eu^(2.)) and Green (CeMgAl_(10)O_(17):Tb^3) Rare Earth Phosphors by Liquid/Liquid Extraction

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Journal of Wuhan University of Technology(materials science) 2009年第4期24卷 603-607页

作者：梅光军 School of Resource and Environmental engineering Wuhan University of Technology

A novel process for separation of red （Y2.3：Eu^3＋）, blue（BaMgAl10O17：Eu^2.） and green （CeMgAl10O17：Tb^3） rare earth fluorescent powders was proposed. At first, the blue powder can be extracted selectively from an aqueous solution using a chelating collector 2.thenoyltrifluoroacetone （TTA） dissolved in heptane at alkaline pH condition, then, chloroform was used for extracting the green powder into organic phase. The red phosphor remains in aqueous phase with potassium sodium tartrate depressant （PST）. Therefore, three phosphors can be separated successfully from their artificial mixtures by liquid/liquid extraction, and grades and recovery of separated products reach respectively as follows： red is 96.9% and 95.2., blue is 82.7% and 98.8%, green is 94.6% and 82.6%.

关键词： rare earth phosphor solid-solid separation liquid/liquid extraction

Preparation and Biodistribution of Tyrosine Modified Multiwall Carbon Nanotubes

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Preparation and Biodistribution of Tyrosine Modified Multiwa...

PREPARATION AND CHARACTERIZATION OF LA2.3 GATE DIELECTRIC BY LOW PRESSURE MOCVD

第十届中国科协年会

作者： LIANG Geyu 1, ZHANG Tao 2. LIU Ran 1, YE Bing 1, YIN Lihong 1, PU Yuepu 1* (1. School of Public Health, Southeast University, nanjing 2.0009 2. department of material science and engineering, N{2. Key laboratory of solid state microstructures, nanjing University, nanjing 2.0093)

The functionalized derivative outside carbon nanotubes (CNTs) is likely to improve their biocompatibility. Therefore, CNTs have attracted great attention not only in electrical, optical and mechanical applications but also in biological and pharmaceutical applications. Thus, it is important to examine the biodistribution and kinetics of the carbon-based nanotubes when they are introduced into living systems. Here, we synthesized and characterized tyrosine functionalized carbon nanotubes (CNTs-Tyr) and show the biodistribution profiles of CNTs-Tyr in mice following three different administrations by 12.I labeled radioisotope tracing method. It is shown that the behavior of CNTs-Tyr in mice is different from that reported previously. CNTs-Tyr was quickly delivered around the whole mice body and accumulated mainly in lung and also slightly in spleen and liver after mice were exposed by intravenous injection for 2.hrs. The functionalized group of carbon nanotubes may have effect their affinity to organs. The results provide basic biological information for the biomedical application and risk assessment of CNTs.

关键词： Carbon nanotubes (CNTs) Tyrosine 12.I labeled Biodistribution

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PREPARATION AND CHARACTERIZATION OF LA2O3 GATE DIELECTRIC BY...

microstructure Evolution of Semi-solid Processed Hyper-eutectic Al-30%Si Alloy

第8届国际材联电子材料国际研讨会

作者： Hui-Qin Ling, Qi-Yue Shao, Ai-Dong Li Di Wu, Yuan wang, Yan Feng, Sen-Zhu Yang, Zhi-Guo Liu, Mu Wang, Naiben Ming National laboratory of {2. state microstructure2.0093,. china material science and engineering Departm s, nanjing University, nanjing ent, nanjing University, nanjing 2.0093, china Physics department, nanjing University, nanjing, 2.0093,. china Electronic science and engineering department, nanjing University, nanjing 2.0093, china

As circuit densities increase, the need for high-density capacitances also increases in both mixed signal and memory circuits. Semiconductor Industry Association technology roadmaps predict the need for a sub-2.A silicon oxide for a sub-0.1 μm CMOS. As conventional SiO gate dielectric scales down to less than 2.A, a high leakage current is inevitable due to the occurrence of direct tunneling. The alternative dielectric

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International Journal of Minerals,Metallurgy and materials 1999年第4期13卷 259-261页

作者： Yanjun Li Weimin Mao Xueyou Zhong(material science and {2. School, University of science and Technology Beijing, Beijing 100083, china) material science and {2. School University of Science and Technology Beijing Beijing 100083 China

An investigation was made on the influences of mechanical stirring on microstructure of hyper-eutectic Al-30%Si alloy (inmass fraction) during solidification. The primary Si crystals formed in the alloy melt were gradually changed from elongated platelets tonear-spherical shapes by mechanical stirring. The spheroidization of primary St crystals occurs by the mechanism of bending and fractureof Si platelets, wear and collision between Si crystals, and coalescence of small Si particles. The influence of under-cooling and coolingrate of the alloy melt on primary Si crystals of semi-solid processed alloys is investigated as well. The increase of under-cooling andcooling rate decreases the size of primary Si crystals.

关键词： semi-solid state process solidification structure mechanical stirring hyper-eutectic Al-Si alloy

Influence of Molecular Weight of PEO on Performance of Quasi-solid-state Dye-sensitized Solar Cells

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Journal of Wuhan University of Technology(materials science) 2010年第2期25卷 218-222页

作者：沈小林 School of materials science & {2. Xi’an Jiaotong University

Quasi-solid-state dye-sensitized solar cells （DSCs） were prepared using gel electrolyte gelated by poly（ethylene-oxide）（PEO） with different molecular weight. With the increase in PEO molecular weight, the short circuit current densities （Jsc） increase significantly, which is related to the increase in I - diffusion due to the increase in free volume of gel electrolyte. However, only a slight increase in open voltage （Voc） is observed, which is explained by the decrease in dark current arising from the reduction of triiodide （I3^-） by conduction band electrons.

关键词： dye-sensitized solar cell poly(ethylene oxide) gel electrolyte molecular weight

microstructure Characteristics and Apparent Viscosity of Hypereutectic Al-2.%Si Alloy Melt During Semi-solid {2. Stirring

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Journal of University of science and Technology Beijing 2001年第2期8卷 126-128页

作者： Yanjun Li, Weimin Mao, Zisheng Zhen, Xueyou Zhong (material science and {2. School, University of science and Technology Beijing, Beijing 100083, china) material Sci. and engineering School University of Science and Technology Beijing 100083 China

The microstructural evolution and apparent viscosity of hypereutectic Al-2.%Si alloy during semi-solid state shearing were studied with a Searte type viscometer. When the alloy melt was continuously stirred from 72. degreesC to eutectic temperature, the primary Si crystals were gradually changed from elongated platelets to near-spherical shapes. It was found that some nondendritic a-phase formed when the melt was stirred below 585 degreesC. The experiment showed that the semi-solid stirring had strong effect on inhibiting the anisotropic growth of Si crystals during solidification. The apparent viscosity of the alloy melt increased slowly with the decreasing of temperature before the formation of nondendritic alpha -phase, which caused the dramatic increase of apparent viscosity.

关键词： hypereutectic Al-Si alloy solidification structures apparent viscosity

Correlation between Thermal Expansion and Magnetic Characteristics of Fe-Ni Alloys in Fe_(1-x)Ni_x/Cu Superlattices

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International Journal of Minerals,Metallurgy and materials 1998年第3期12卷 169-174页

作者： Weizhong Tang H Zabel(Matrial science and engineering School, University of science and Technology Beijing, Beijing 100083, china)(Institute of Experimental Physics/solid state Physics, Ruhr University Bochum, 44780 Bochum, Germany) material science and {2. School University of Science and Technology Beijing Beijing 100083 China Institute of Experimental Physics/solid state Physics Ruhr University Bochum 44780 Bochum Germany

Thermal expansion behaviors of FeNi alloys were investigated by means of X-ray diffraction technique within a Fe1 -xNix/Cu superiattice structure. It was found that with a Ni concentration of x = 0.35, FeNi alloy layers showed the well-known Invar behavior, but for alloy layers with either lower or higher Ni concentrations, thermal expansion coefficients were larger. Based on results of magnetic measurements it is concluded that FeNi alloy layers with Ni concentrations lower than the Invar composition are in a superparamagnetic state which leads not only to low spontaneous magnetizations but also to large thermal expansions of the alloy layers.

关键词： thermal expansion Invar behavior FeNi alloys superlattice magnetism

Preparation and Characterization of Co_(0.3)Cr_(0.7)O_x Particles Using for Thermal Radiation Coating

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稀有金属材料与工程 2012年第S1期41卷 100-103页

作者： Luo Lijie1,2.Huang Chuanbing1,Zhu Yongping1,Zhang Weigang1 1 state Key laboratory of Multi-phase Complex Systems,Institute of Process {2.,Chinese Academy of sciences,Beijing 100190,china 2.Graduate University of Chinese Academy of sciences,Beijing 100049,china Chinese Acad Sci Inst Proc Engn State Key Lab Multiphase Complex Syst Beijing 100190 Peoples R China Chinese Acad Sci Grad Univ Beijing 100049 Peoples R China

Novel Co0.3Cr0.7Ox(x=2.3)particles with spinel structure were synthesized via precipitation method through the reactions among CoSO4,Cr(NO3)3 and NaOH solutions,followed by spray-drying and sintering at 12.0 ℃for 4h in the *** particles were characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM).The XRD results revealed that the particles are composed of Co0.3Cr0.7Ox phase without the presence of other *** SEM observation showed that the particles are in the shape of sphere with well *** radiation test indicated that the total infrared normal emissivity of the coating made of Co0.3Cr0.7Ox can be up to 0.92.at 800℃.And the normal emissivities of the prepared Co0.3Cr0.7Ox particles are always slightly larger than those of CoCr2.4 particles prepared by solid-state reaction method in the test temperature range of 50-300℃.The relatively high thermal emissivity of Co0.3Cr0.7Ox is assumed to be mainly attributed to the spinel *** results indicated that Co0.3Cr0.7Ox particles are a good thermal radiation {2.,which can be used as infrared radiation layer in thermal protection system.

关键词： Co0.3Cr0.7Ox particles preparation precipitation thermal radiation coating

Study on ChemFET NO2.Gas Sensor Array

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稀有金属材料与工程 2006年第S3期 104-105页

作者： Guangzhong Xie~1 Junsheng Yu~1 Huilin Tai~1 Wusheng Suo~1 Yadong Jiang~1 Bangchao Yang~2.(1.School of Optoelectronic Information,University of Electronic science & Technology of china,Chengdu 610054,china) (2.School of Microelectronics and solid-state Electronics,University of Electronic science & Technology of china,Chengdu 610054,china)

Based on conventional metal-oxide-semiconductor field-effect transistor （MOSFET）,a novel kind of chemical field-effect transistor （ChemFET） gas sensor array has been designed and *** obtained sensor consists of self-assembly polyaniline （PAN） composite film containing poly（acrylic acid）（PAA） which was used as gate material of MOSFET instead of conventional metallic *** UV-Vis absorption spectra of PAN/PAA films were *** NO2.as sensitive property of the ChemFET sensor array was also *** show that the drain current of devices increases with increasing of back-side voltage,and decreases with the increase of NO2.oncentration when the NO2.oncentration is below 2.μg/*** temperature dependence of ChemFET sensor array shows that the drain current of ChemFET sensor decreases with increasing of temperature.

关键词： NO2.sensitivity ChemFET sensor self-assembly polyaniline poly (acrylic acid)