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Efficient Synthesis of PbTe Nanoparticle Networks

Qiangfeng Xiao1, Ding Weng1, Zhenglong Yang1, Javier Garay2, Minjuan Zhang3 (), and Yunfeng Lu1 ()
 
1 Chemical and Biomolecular Engineering Department, University of California, Los Angeles, CA 90095, USA
2 Mechanical Engineering Department, University of California, Riverside, CA 92521, USA
3 Materials Research Department, Toyota Motor Engineering and Manufacturing North America, Inc., 1555 Woodridge Ave. Ann Arbor,
MI 48105, USA

DOI 10.1007/s12274-010-0030-8

Nano Res. 2010, 3(10): 685每693

Address correspondence to Minjuan Zhang, mindy.zhang@tema.toyota.com; Yunfeng Lu, luucla@ucla.edu

A highly efficient method has been developed for the synthesis of networks of PbTe nanoparticles in aqueous media using weakly coordinating carbohydrate ligands.

    

Graphene-Like Bilayer Hexagonal Silicon Polymorph

Jaeil Bai1, Hideki Tanaka2, and Xiao Cheng Zeng1 ()
 
1 Department of Chemistry and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, Nebraska
68588, USA
2 Department of Chemistry, Okayama University, Okayama 700-8530, Japan

DOI 10.1007/s12274-010-0032-6

Nano Res. 2010, 3(10): 694每700

Address correspondence to xczeng@phase2.unl.edu

Molecular dynamics simulation evidence for a quasi-two-dimensional bilayer silicon in a slit nanopore is presented; this new polymorph of silicon exhibits a bilayer hexagonal structure in which the coordination number of every silicon atom is four.

    

TiO2 Nanocrystals Grown on Graphene as Advanced Photocatalytic Hybrid Materials

Yongye Liang, Hailiang Wang, Hernan Sanchez Casalongue, Zhuo Chen, and Hongjie Dai ()
 
Department of Chemistry and Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, USA
∫ These authors contributed equally.

DOI 10.1007/s12274-010-0033-5

Nano Res. 2010, 3(10): 701每705

Address correspondence to hdai@stanford.edu

A graphene/TiO2 nanocrystals hybrid has been prepared by directly growing TiO2 nanocrystals on graphene oxide (GO) sheets by a two-step method, in which TiO2 was first coated on GO sheets by hydrolysis and subsequently crystallized into anatase nanocrystals by hydrothermal treatment. The graphene/TiO2 nanocrystals hybrid shows superior photocatalytic activity to other TiO2 materials in the degradation of rhodamine B, with an impressive three-fold photocatalytic enhancement over P25

    

Contactless Monitoring of the Diameter-Dependent Conductivity of GaAs Nanowires

Fauzia Jabeen1,2, Silvia Rubini2() , Faustino Martelli2, Alfonso Franciosi1,2, Andrei Kolmakov3, Luca Gregoratti1, Matteo Amati1, Alexei Barinov1, Andrea Goldoni1, and Maya Kiskinova1()
 
1 Sincrotrone Trieste S. C. P. A., Elettra Laboratory, Area Science Park, S. S. 14, Km. 163.5, I-34149 Trieste, Italy
2 Laboratorio TASC IOM-CNR, Area Science Park, S. S. 14, Km. 163.5, I-34149 Trieste, Italy
3 Department of Physics, Southern Illinois University Carbondale, 1245 Lincoln Dr. Neckers 478, Carbondale, IL 62901-4401, USA

DOI 10.1007/s12274-010-0034-4

Nano Res. 2010, 3(10): 706每713

Address correspondence to Maya Kiskinova, kiskinova@elettra.trieste.it; Sivia Rubini, rubini@tasc.infm.it

By means of photoelectron microscopy, the changes in con- ductivity () with diameter (d) of pencil-like GaAs nanowires have been evaluated by contactless monitoring of the position-dependent surface potential (VS) created by the X-ray microprobe along individual nanowires. Substantial size effects and a drastic con- ductivity drop upon exposure to oxygen ambient were found.

    

Towards Flexible All-Carbon Electronics: Flexible Organic Field- Effect Transistors and Inverter Circuits Using Solution-Processed All-Graphene Source/Drain/Gate Electrodes

Yongsheng Chen1 (), Yanfei Xu1, Kai Zhao2, Xiangjian Wan1, Jiachun Deng2, and Weibo Yan1

 

1 Key Laboratory of Functional Polymer Materials and Center for Nanoscale Science & Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
2 Key Laboratory of Display Materials and Photoelectric Devices, Institute of Material Physics, Tianjin University of Technology, Tianjin 300384, China

DOI 10.1007/s12274-010-0035-3

Nano Res. 2010, 3(10): 714每721

Address correspondence to yschen99@nankai.edu.cn

All-graphene-electrode, pentacene organic field-effect transistors (OFETs) and inverter circuits with good electronic performance and mechanical flexibility have been fabricated. Proof-of-concept OFETs show mobility of 0.02 cm2/(V•s) and on/off ratio of approximately 106. The inverters achieve a gain as high as 3.

    

Highly-Sensitive Multiplexed in vivo Imaging Using PEGylated Upconversion Nanoparticles

Liang Cheng1, Kai Yang1, Shuai Zhang1, Mingwang Shao1(), Shuittong Lee2, and Zhuang Liu1 ()
 
1 Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials, Soochow University, Suzhou, Jiangsu 215123, China
2 Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China

DOI 10.1007/s12274-010-0036-2

Nano Res. 2010, 3(10): 722每732

Address correspondence to Zhuang Liu, zliu@suda.edu.cn; Mingwang Shao, mwshao@suda.edu.cn

A series of upconversion nanoparticles (UCNPs) with different emission colors have been prepared and functionalized with an amphiphilic polymer to confer water solubility. Multicolor in vivo upconversion luminescence (UCL) imaging has been demonstrated by imaging subcutaneously injected UCNPs and applied in multiplexed in vivo lymph node mapping. The autofluorescence- free UCL imaging exhibited significantly higher in vivo detection sensitivity than quantum dot-based fluorescence imaging.

    

LiMn2O4 Microspheres: Synthesis, Characterization and Use As a Cathode in Lithium Ion Batteries

Xiaoling Xiao, Jun Lu, and Yadong Li()
 
Department of Chemistry and State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China

DOI 10.1007/s12274-010-0037-1

Nano Res. 2010, 3(10): 733每737

Address correspondence to ydli@mail.tsinghua.edu.cn

Solid and hollow microspheres of LiMn2O4 have been prepared by a simple, template-free and high yield method and used as cathode materials in lithium ion batteries. The LiMn2O4 hollow microspheres exhibited better rate capability than the solid microspheres. However, the tap density of the solid microspheres was four times that of the hollow microspheres.

    

Movable Au Microplates as Fluorescence Enhancing Substrates for Live Cells

Boya Radha1, Mohammed Arif2, Ranjan Datta3, Tapas K. Kundu2, and Giridhar U. Kulkarni1()
 
1 Chemistry and Physics of Materials Unit and DST Unit on Nanoscience, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560064, India
2 Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560064, India
3 International Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560064, India

DOI 10.1007/s12274-010-0040-6

Nano Res. 2010, 3(10): 738每747

Address correspondence to kulkarni@jncasr.ac.in

Large single-crystalline Au microplates produced by thermolysis of a Au每organic complex, serve as substrates for live cells and enhance fluorescence from the nucleus. The plates can be easily manipulated and organized.

    

Laterally Confined Graphene Nanosheets and Graphene/SnO2 Composites as High-Rate Anode Materials for Lithium-Ion Batteries

Zhiyong Wang1, Hao Zhang2, Nan Li1, Zujin Shi1 (), Zhennan Gu1, and Gaoping Cao2
 
1 Beijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Materials Chemistry and Applications, College of
Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
2 Research Institute of Chemical Defense, West Building, 35 Huayuanbei Road, Beijing 100083, China

DOI 10.1007/s12274-010-0041-5

Nano Res. 2010, 3(10): 748每756

Address correspondence to zjshi@pku.edu.cn

Few-layered graphene nanosheets with widths of 100每200 nm exhibit superior rate capability over micro-scale graphene nanosheets as anode materials in lithium-ion batteries.

    

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