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Symmetric Growth of Pt Ultrathin Nanowires from Dumbbell Nuclei for Use as Oxygen Reduction Catalysts

Qiangfeng Xiao1, Mei Cai2 (), Michael P. Balogh2, Misle M. Tessema1, and Yunfeng Lu3 ()


1 Optimal CAE Inc, 14492 Sheldon Road, Plymouth, MI 48170, USA
2 General Motors Global Research and Development Center, 30500 Mound Road, Warren, MI 48090-9055, USA
3 Chemical and Biomolecular Engineering Department, University of California, Los Angeles, CA 90095, USA

DOI 10.1007/s12274-012-0191-8

Nano Res. 2012, 5(3): 145每151

Address correspondence to Mei Cai, mei.cai@gm.com; Yunfeng Lu, luucla@ucla.edu

Pt ultrathin nanowires (b) have been synthesized from dumbbell nuclei (a) by symmetric growth and used for electrocatalytic reduction of oxygen.

    

The Oxidation Characteristics of Silicon Nanowires Grown with an Au Catalyst

Jung Min Bae1, Woo Jung Lee1, Jin Won Ma1, Mann Ho Cho1 (), Jae Pyung Ahn2, and Hong Seok Lee3

 

1 Department of Physics and Applied Physics, Yonsei University, Seoul 120-749, Korea
2 Nano Materials Analysis Center, Korea Institute of Science and Technology, Seoul 136-791, Korea
3 Advanced Photonic Research Institute, Gwangju Institute Science and Technology, Gwangju 500-712, Korea

DOI 10.1007/s12274-012-0195-4

Nano Res. 2012, 5(3): 152每163

Address correspondence to mh.cho@yonsei.ac.kr

During the oxidation process of the SiNWs, since the Au每Si alloy of the tip is confined by the surrounding cylindrical SiO2 layer, the Au每Si alloy can be deformed by the SiO2. As a result, the transformation of the Au tip after oxidationshows different tendency depending on wire diameter (top: small diameter, bottom: large diameter).

    

Performance Projection of Graphene Nanomesh and Nanoroad Transistors

Gyungseon Seol, Bala Kumar, and Jing Guo ()


Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL 32611, USA

DOI 10.1007/s12274-012-0196-3

Nano Res. 2012, 5(3): 164每171

Address correspondence to guoj@ufl.edu

The bandgap of two-dimensional (2D) graphene can be tuned by applying chemical modifications such as hydrogenation or fluorination. Metal每oxide每semiconductor field-effect transistors (MOSFETs) employing selectively chemical modified graphene as a channel have been assessed.

    

Anomalous Kink Behavior in the Current每Voltage Characteristics of Suspended Carbon Nanotubes

Moh Amer, Adam Bushmaker, and Steve Cronin ()


3710 McClintock Ave., Department of Electrical Engineering, University of Southern California, Los Angeles, California, 90089, USA

DOI 10.1007/s12274-012-0197-2

Nano Res. 2012, 5(3): 172每180

Address correspondence to scronin@usc.edu

A sudden decrease in current, or ※kink§, is observed in the current-voltage characteristics of suspended carbon nanotube devices. This anomalous feature is attributed to a threshold optical phonon emission process, through a systematic investigation.

    

Facile Syntheses and Enhanced Electrocatalytic Activities of Pt Nanocrystals with {hkk} High-Index Surfaces

Lei Zhang, Dingqiong Chen, Zhiyuan Jiang (), Jiawei Zhang, Shuifen Xie, Qin Kuang, Zhaoxiong Xie (), and Lansun Zheng


Department of Chemistry and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China

DOI 10.1007/s12274-012-0198-1

Nano Res. 2012, 5(3): 181每189

Address correspondence to Zhiyuan Jiang, zyjiang@xmu.edu.cn; Zhaoxiong Xie, zxxie@xmu.edu.cn

Pt nanocrystals (NCs) with a series of {hkk} high-index facets including {211} and {411} have been successfully synthesized via a solvothermal method. The as-prepared Pt NCs with high-index {hkk} surfaces exhibited much better catalytic activity in the electro-oxidation of ethanol than a commercial Pt/C catalyst or Pt nanocubes with low-index {100} surfaces, and the catalytic activities of Pt crystal facets decreased in the sequence {411}>{211}>{100}.

    

Vertical Oxide Nanotubes Connected by Subsurface Microchannels

Henrik Persson1 (), Jason P. Beech1, Lars Samuelson1, Stina Oredsson2, Christelle N. Prinz1,3, and Jonas O. Tegenfeldt1,4 ()

1 Solid State Physics/The Nanometer Structure Consortium, Box 118, Lund University, SE-221 00 Lund, Sweden
2 Department of Biology, Lund University, SE-223 62 Lund, Sweden
3 Neuronano Research Center, Lund University, SE-221 84 Lund, Sweden
4 Department of Physics, University of Gothenburg, SE-412 96 Gothenburg, Sweden

DOI 10.1007/s12274-012-0199-0

Nano Res. 2012, 5(3): 190每198

Address correspondence to Henrik Persson, Henrik.Persson@ftf.lth.se; Jonas O. Tegenfeldt, Jonas.Tegenfeldt@ftf.lth.se

We show a fabrication method to create oxide nanotubes with a subsurface fluidic connection. The final device will be used to inject molecules into cells pierced by the nanotubes.

    

A Functionalized Graphene Oxide每Iron Oxide Nanocomposite for Magnetically Targeted Drug Delivery, Photothermal Therapy, and Magnetic Resonance Imaging

Xinxing Ma1,2,†, Huiquan Tao2,†, Kai Yang2, Liangzhu Feng2, Liang Cheng2, Xiaoze Shi2, Yonggang Li1 (*), Liang Guo1 (*), and Zhuang Liu2 (*)


1 Department of Radiology, the First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, China
2 Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China

DOI 10.1007/s12274-012-0200-y

Nano Res. 2012, 5(3): 199每212

Address correspondence to Zhuang Liu, zliu@suda.edu.cn; Liang Guo, ilguoliang@sohu.com; Yonggang Li, liyonggang224@163.com

A multi-functional graphene oxide每iron oxide hybrid nanocomposite (GO每IONP) has been synthesized and then functionalized by a biocompatible polymer, polyethylene glycol (PEG). The resulting GO每IONP每PEG is biocompatible and can be utilized for magnetically targeted drug delivery, photothermal therapy, and in vivo magnetic resonance imaging of tumor-bearing mice.

    

Visible Light Photocatalytic Activity of Nitrogen-Doped La2Ti2O7 Nanosheets Originating from Band Gap Narrowing

Fanke Meng1, Zhanglian Hong2 (), James Arndt3, Ming Li1, Mingjia Zhi1, Feng Yang4, and Nianqiang Wu1 ()

1 Department of Mechanical and Aerospace Engineering, WVNano Initiative, West Virginia University, Morgantown, WV 26506-6106, USA
2 State Key Laboratory of Silicon Materials, Department of Materials Science & Engineering, Zhejiang University, Hangzhou 310027, China
3 Department of Chemistry, West Virginia University, Morgantown, WV 26506, USA
4 Department of Industrial and Management Systems Engineering, West Virginia University, Morgantown, WV 26506, USA

DOI 10.1007/s12274-012-0201-x

Nano Res. 2012, 5(3): 213每221

Address correspondence to Nianqiang Wu, nick.wu@mail.wvu.edu; Zhanglian Hong, hong_zhanglian@zju.edu.cn

Doping nitrogen into pristine lanthanum titanate (La2Ti2O7) nanosheets can narrow the band gap rather than creating localized mid-gap states, which is able to improve the photocatalytic activity of La2Ti2O7 nanosheets under both visible light and ultraviolet light irradiation.

    

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