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国际材联2013国际先进材料大会——主题3:纳米非晶材料、材料加工与基因工程

作者： Yuanyuan Huang Shuliang liu Bin Sun Yunze Long College of Physics Qingdao University College of Chemistry Chemical Engineering and Environment Qingdao University Key Laboratory of Photonics Materials and Technology in Universities of Shandong Qingdao University State Key Laboratory Cultivation Base of New Fiber Materials and Modern Textile Qingdao University

Using patterned conductive and insulating collection devices,fibrous patterns from polyvinyl pyrrolidone were fabricated by *** that the electrospun fibers tend to deposit along the direction of electric field line,when conductive patterned template is used as collector during electrospinning,the as-spun fibers tend to assemble onto the conductive grids,whereas the dropping fibers prefer to avoid insulation grid by concentrating toward the surface of the Al foil when an insulating grid based on Al foil is used as collector.

关键词： Electrospinning,Micro/nanofibers,Fibrous pattern.

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Bond deformation paths and electronic instabilities of ultraincompressible transition metal diborides: Case study of OsB2 and IrB2

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Physical Review B 2014年第9期90卷 094115-094115页

作者： R. F. Zhang D. Legut X. D. Wen S. Veprek K. Rajan T. Lookman H. K. Mao Y. S. Zhao School of Materials Science and Engineering and International Research Institute for Multidisciplinary Science Beihang University Beijing 100191 P. R. China Theoretical division Los Alamos National Laboratory Los Alamos New Mexico 87545 USA Department of Materials Science and Engineering Iowa State University Ames IA50010 USA Nanotechnology Centre VSB-Technical University of Ostrava CZ-708 33 Ostrava Czech Republic State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences P.O. Box 165 Taiyuan Shanxi 030001 P. R. China & Synfuels China Beijing 100195 P. R. China Department of Chemistry Technical University Munich Lichtenbergstr. 4 D-85747 Garching Germany Geophysical Laboratory Carnegie Institution of Washington NW Washington DC 20015 USA Center for High Pressure Science and Technology Advanced Research Shanghai 201203 P. R. China HiPSEC Department of Physics and Astronomy University of Nevada Las Vegas NV 89154 USA

The energetically most stable orthorhombic structure of OsB2 and IrB2 is dynamically stable for OsB2 but unstable for IrB2. Both diborides have substantially lower shear strength in their easy slip systems than their metal counterparts. This is attributed to an easy sliding facilitated by out-of-plane weakening of metallic Os-Os bonds in OsB2 and by an in-plane bond splitting instability in IrB2. A much higher shear resistance of Os-B and B-B bonds than Os-Os ones is found, suggesting that the strengthened Os-B and B-B bonds are responsible for hardness enhancement in OsB2. In contrast, an in-plane electronic instability in IrB2 limits its strength. The electronic structure of deformed diborides suggests that the electronic instabilities of 5d orbitals are their origin of different bond deformation paths. Neither IrB2 nor OsB2 can be intrinsically superhard.

关键词： DEFORMATIONS (Mechanics) SHEAR (Mechanics) OSMIUM compounds RHENIUM compounds BORIDES CASE studies

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Self-powered ultraviolet photodetector based on single ZnO microwire/p-Si double heterojunctions

Self-powered ultraviolet photodetector based on single ZnO m...

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International Conference on Nanoscience & technology,China 2013(ChinaNANO 2013)(中国国际纳米科学和技术大会)

作者： Xiaofeng Hu Junjie QI Xin Li Zengze Wang Shengnan Lu Yue Zhang Key Laboratory of New Energy Materials and Technologies University of Science and Technology BeijingBeijing 100083People's Republic of China State Key Laboratory for Advanced Metals and Materials School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083People's Republic of China

Recently, self-powered devices based on a p-n heterojunction were frequently reported, but there were few report about self-powered UV detectors based on single ZnO microwire/p-Si double *** to the common p-n junction type device with an n-type ZnO microwire/p-Si heterostructure, the newly designed device with double heterojunctions based on a single n-type ZnO microwire and a p-type Si film displaysed interesting electrical characteristics such as a high rectification ratio and a low turn-on *** zero bias, the fabricated device had a high photosensitivity of~3.17*103 under UV illumination and a fast response time less than ***,which was shorter than that of the device at forward bias (less than 0.2ms).

关键词： double heterojunctions self-powered UV detector ZnO microwire

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Ultraviolet Photodetectors based on 1-D ZnO Nanostructures

Ultraviolet Photodetectors based on 1-D ZnO Nanostructures

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第三届纳米化学前沿论坛(Frontiers of Nanochemistry-2013)

作者： Zhiming Bai Xiaoqin Yan Yue Zhang State Key Laboratory for Advanced Metals and Materials School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 People''s Republic of China Key Laboratory of New Energy Materials and Technologies University of Science and Technology Beijing Beijing 100083 People''s Republic of China

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ZnO Nano-array as Sensing Membrane of EGFET for Glucose Detection

ZnO Nano-array as Sensing Membrane of EGFET for Glucose Dete...

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International Conference on Nanoscience & technology,China 2013(ChinaNANO 2013)(中国国际纳米科学和技术大会)

作者： Junjie Qi Huihui Zhang Xiaofeng Hu Wang Liu Xin Li Yue Zhang Key Laboratory of New Energy Materials and Technologies University of Science and Technology BeijingBeijing 100083People's Republic of China State Key Laboratory for Advanced Metals and Materials School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083People's Republic of China

Electrochemical biosensors have been the most widely used glucose biosensors due to its direct conversion of a biological event to an electric ***, several aspects such as low operational stability and interference problems in complex sample matrices largely restrain the application of electrochemical *** disadvantages can be overcome by using the structure of the extended gate field effect transistor (EGFET).

关键词： ZnO nano-array EGFET glucose detection

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Biocompatibility Evaluationof Cellulose Nanowhiskerfrom Bamboo Fibers forPotential Applications of Drug Deliveryin Vitro

Biocompatibility Evaluationof Cellulose Nanowhiskerfrom Bamb...

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国际材联2013国际先进材料大会

作者： Yong Zhang Lan Ma Yeli Yu Juming Yao The Key Laboratory of Advanced Textile Materials and Manufacturing Technology of the Ministry of Education College of Materials and Textiles Zhejiang Sci-Tech University Zhejiang Provincial Top Key Discipline of New Materials and Process Engineering College of Chemical Engineering and Materials Science ZhejiangUniversity of Technology Engineering ResearchCenter for Eco-Dyeing & Finishing of Textiles Ministry of EducationzhejiangSci-TechUniversity

The biocompatibilityof the cellulose nanowhisker(CNW)fromcellulase hydrolysiswas evaluated in vitro for potential applications in drug delivery system. The assessments were comprised of cytotoxicity analysis and proliferation of human osteosarcoma MG-63 cellsthat were cultured with the resultant CNW. Some morphological and physico-chemicalcharacteristics ofthe CNW were investigated. Thecellulase hydrolysis conditions were optimized at acellulase dosage of0.01 mL/g dried fibers, a hydrolysis temperature of60 °C, hydrolysis time of 3 h and bamboo fiber concentration of 2 wt%.Under these conditions, the as-prepared CNWretained more properties similar to the original bamboo fibers than those fabricated by sulfuric acid hydrolysis. Indirect cytotoxicity test of the CNW revealed it non-toxicity to the cells. The proliferation of the MG-63 cells with the CNWfromcellulase hydrolysiswas better than that from sulfuric acid hydrolysis. Theseresultstogether with the fact that thecellulosehydrolysispreparation of CNW is simple and inexpensive make ita good candidate for thedesign of oral drug delivery device.

关键词： Cellulose,Nanowhisker,Drug,delivery,Biocompatibility,Bamboo,Fiber.

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The Status and Trend of PEMFC Membrane Electrode Assembly

The Status and Trend of PEMFC Membrane Electrode Assembly

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第五届世界氢能技术大会(WHTC2013)

作者： Yongcheng Ai Jianjun Tang Zhaohui Wan Mu Pan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei 430070 China WUT New Energy Co. Ltd. Wuhan Hubei 430223 China WUT New Energy Co. Ltd. Wuhan Hubei 430223 China

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Effect of Cationic Groups in Organic Sulfide Electrolyte on the performance of Quantum Dot Sensitized Solar Cells

Effect of Cationic Groups in Organic Sulfide Electrolyte on ...

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International Conference on Nanoscience & technology,China 2013(ChinaNANO 2013)

作者： Xin Li Heping Shen Jianbao Li Hong Lin State Key Laboratory of New Ceramics & Fine Processing School of Material Science and Engineering Tsinghua University Key Laboratory of Ministry of Education for Application Technology of Chemical Materials in Hainan Superior Resources Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources College Of Materials Science And Chemical Engineering Hainan University

Two organic redox couples: tetrabutylammonium cation (McMT - TBA + )/disulfide dimer (BMT) and tetramethylammonium cation (McMT - TMA + )/BMT derived from 2-mercapto-5-methyl-1, 3, 4-thiadiazole (McMT) were introduced to the CdS quantum dots sensitized solar cells (QDSCs), compared with the one based on the inorganic sulfide electrolyte (Na 2 S/S).It was found that the charge transfer resistances at the interface of the organic sulfide electrolytes and the platinum counter electrode are much lower and the interface reaction rates are higher. QDSCs based on organic sulfide electrolytes exhibited high fill factors, open circuit photovoltages, and therefore higher conversion efficiency, thanks to the much larger recombination resistance. In addition, the effects of different cationic groups: TBA + , TMA + ,on charge recombination and transfer have been discussed. A highest efficiency of 6.3% was achieved for QDSCs using the electrolyte based on McMT - (TMA + )/BMT redox coupled with CdS quantum dots.

关键词： quantum dots, solar cells, organic sulfide electrolyte, cationic groups, charge diffusion

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An effective reflectance method for designing broadband antireflection films coupled with solar cells

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Chinese Physics B 2012年第3期21卷 458-462页

作者：詹锋贺继方尚向军李密锋倪海桥徐应强牛智川 The Key Laboratory of Nonferrous Metal Materials and New Processing Technology of Ministry of Education Guangxi University State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of Sciences

The solar spectrum covers a broad wavelength range, which requires that antireflection coating （ARC） is effective over a relatively wide wavelength range for more incident light coming into the cell. In this paper, we present two methods to measure the composite reflection of SiO2/ZnS double-layer ARC in the wavelength ranges of 300-870 nm （duaI- junction） and 300-1850 nm （triple-junction）, under the solar spectrum AM0. In order to give sufficient consideration to the ARC coupled with the window layer and the dispersion effect of the refractive index of each layer, we use multidimensional matrix data for reliable simulation. A comparison between the results obtained from the weighted-average reflectance （WAR） method commonly used and that from the effective-average reflectance （EAR） method introduced here shows that the optimized ARC through minimizing the effective-average reflectance is convenient and available.

关键词： weighted-average reflectance effective-average reflectance transfer matrix

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Antibacterial and biocompatible properties of vancomycin-loaded nano-hydroxyapatite/collagen/poly (lactic acid) bone substitute

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Progress in Natural Science:materials International 2013年第6期23卷 549-556页

作者： Xiaojie Lian Huanye Liu Xiumei Wang Suju Xu Fuzhai Cui Xizhuang Bai State Key Laboratory of New Ceramics & Fine Processing School of Materials Science and EngineeringTsinghua University College of Mechanics Taiyuan University of Technology Department of Orthodontics School of StomatologyChina Medical University Department of Orthopedics First Affiliated HospitalChina Medical University

Infected bone defects are normally regarded as contraindications for bone *** the present study,an antibacterial bone graft substitute was synthesized by loading vancomycin(VCM) in our previously developed mineralized collagen based composite,nano-hydroxyapatite/collagen/poly(lactic acid)(nHAC/PLA),aiming to repair large size bone defects and inhibit related infections *** VCM/nHAC/PLA showed typical porous structure with a porosity of(80.7± 6.7)%and compressive strength of 1.52 *** delivery of VCM from VCM/nHAC/PLA was detected in vitro for up to *** their antibacterial properties were determined using inhibition ratio assay and inhibition zone *** high level of inhibition ratio(more than 99%) was obtained in VCM/nHAC/PLA ***,a distinct inhibition zone was clearly formed in Staphylococcus aureus bacterium incubation dish with VCM/nHAC/PLA disc for up to 18 days of ***,both of the nHAC/PLA composites with or without VCM exhibited favorable in vitro and in vivo biocompatibilities for rabbit marrow stromal cells(MSCs) adhesion,spreading,proliferation,and triggering no obvious inflammation responses in subcutaneous *** results suggested that the VCM/nHAC/PLA performed ideal antibacterial property and biocompatibility and has great promise for the treatment of bone defect-related infections in orthopedic surgeries.

关键词： Bone substitute Antibacterial Bone tissue engineering Vancomycin Biocompatibility

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