Volume 3

Issue 10,2010

(9 articles)

Qiangfeng Xiao1, Ding Weng1, Zhenglong Yang1, Javier Garay2, Minjuan Zhang3 (), and Yunfeng Lu1 ()

A highly efficient method has been developed for the synthesis of networks of PbTe nanoparticles in aqueous media using weakly coordinating carbohydrate ligands.
2010, 3(10): 685–693

Jaeil Bai1, Hideki Tanaka2, and Xiao Cheng Zeng1 ()

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.
2010, 3(10): 694–700

Yongye Liang§, Hailiang Wang§, Hernan Sanchez Casalongue, Zhuo Chen, and Hongjie Dai ()

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
2010, 3(10): 701–705

Fauzia Jabeen1,2, Silvia Rubini2() , Faustino Martelli2, Alfonso Franciosi1,2, Andrei Kolmakov3, Luca Gregoratti1, Matteo Amati1, Alexei Barinov1, Andrea Goldoni1, and Maya Kiskinova1()

By means of photoelectron microscopy, the changes in con- ductivity (σ) 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.
2010, 3(10): 706–713

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

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.
2010, 3(10): 714–721

Liang Cheng1, Kai Yang1, Shuai Zhang1, Mingwang Shao1(), Shuittong Lee2, and Zhuang Liu1 ()

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.
2010, 3(10): 722–732

Xiaoling Xiao, Jun Lu, and Yadong Li()

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.
2010, 3(10): 733–737

Boya Radha1, Mohammed Arif2, Ranjan Datta3, Tapas K. Kundu2, and Giridhar U. Kulkarni1()

Large single-crystalline Au microplates produced by thermolysis of a Au–organic complex, serve as substrates for live cells and enhance fluorescence from the nucleus. The plates can be easily manipulated and organized.
2010, 3(10): 738–747

Zhiyong Wang1, Hao Zhang2, Nan Li1, Zujin Shi1 (), Zhennan Gu1, and Gaoping Cao2

Few-layered graphene nanosheets with widths of 100–200 nm exhibit superior rate capability over micro-scale graphene nanosheets as anode materials in lithium-ion batteries.
2010, 3(10): 748–756