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Highly Fluorescent Silver Nanoclusters Stabilized by Glutathione: A Promising Fluorescent Label for Bioimaging

Xavier Le Gu谷vel1, Christian Spies2, Nicole Daum3, Gregor Jung2, and Marc Schneider1 ()
 
 
1 Pharmaceutical Nanotechnology, Saarland University, D-66123 Saarbr邦cken, Germany
2 Department of Biophysical Chemistry, Saarland University, D-66123 Saarbr邦cken, Germany
3 Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research, D-66123 Saarbr邦cken, Germany

DOI 10.1007/s12274-012-0218-1

Nano Res. 2012, 5(6): 379每387

Address correspondence to marc.schneider@mx.uni-saarland.de

Highly fluorescent silver nanoclusters have been prepared by a modified etching process and exhibit distinct fluorescence and lifetime properties. The strong and very high quantum yield together with a high photostability and biocompatibility makes the clusters perfectly suited as imaging labels.

    

Short Channel Field-Effect Transistors from Highly Enriched Semiconducting Carbon Nanotubes

Justin Wu1, Liming Xie1, Guosong Hong1, Hong En Lim2, Boanerges Thendie2, Yasumitsu Miyata2, Hisanori Shinohara2, and Hongjie      Dai1 ()   

1 Department of Chemistry, Stanford University, Stanford, CA 94305, USA
2 Department of Chemistry and Institute for Advanced Research, Nagoya University, Nagoya, 464-8602, Japan

DOI 10.1007/s12274-012-0219-0

Nano Res. 2012, 5(6): 388每394

Address correspondence to hdai1@stanford.edu

Semiconducting single-walled carbon nanotubes (s-SWNTs) with a purity of ~98% obtained by gel filtration of arc-discharge grown SWNTs with diameters in the range 1.2每1.6 nm have been inspected by multi-laser Raman spectroscopy. Several short channel multiple tube field-effect transistors with <15 tubes were able to reach on-currents of ~10 米A while maintaining on/off ratios of >104.

    

LiCoO2 Nanoplates with Exposed (001) Planes and High Rate Capability for Lithium-Ion Batteries

Xiaoling Xiao1,4, Xiangfeng Liu1, Li Wang3, Hu Zhao1, Zhongbo Hu1, Xiangming He3, and Yadong Li2 ()
 
1 College of Materials Science and Opto-Electronic Technology, Graduate University of Chinese Academy of Sciences, Beijing 10049, China
2 Department of Chemistry, Tsinghua University, Beijing 100084, China
3 Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
4 State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering of Chinese Academy of Sciences, Beijing 100190, China

DOI 10.1007/s12274-012-0220-7

Nano Res. 2012, 5(6): 395每401

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

LiCoO2 nanoplates with exposed (001) planes have been successfully synthesized and shown to deliver high rate capabilities in lithium-ion batteries. Although the (001) plane of LiCoO2 is not electrochemically active, the charge/discharge capacity of LiCoO2 nanoplates can still reach 113 mA﹞h/g at 7 C after 100 cycles. The good rate capability results from cracks on the LiCoO2 nanoplates which are perpendicular to the (001) plane and favor fast Li+ transportation. In addition, these cracks facilitate access of the electrolyte to the internal surface throughout the electrode.

    

Different Growth Behaviors of Ambient Pressure Chemical Vapor Deposition Graphene on Ni(111) and Ni Films: A Scanning Tunneling Microscopy Study

Yanfeng Zhang1,2 (), Teng Gao2, Shubao Xie2, Boya Dai2, Lei Fu2, Yabo Gao2, Yubin Chen2, Mengxi Liu2, and Zhongfan Liu2 ()


1 Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
2 Center for Nanochemistry (CNC), Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

DOI 10.1007/s12274-012-0221-6

Nano Res. 2012, 5(6): 402每411

Address correspondence to Yanfeng Zhang, yanfengzhang@pku.edu.cn; Zhongfan Liu, zfliu@pku.edu.cn

Graphene growth on the same metal substrate with different crystal morphologies, such as single crystalline and polycrystalline, may involve different mechanisms. We deal with this issue by preparing graphene on single crystal Ni(111) and on Ni films using an ambient pressure chemical vapor deposition method, and analyze the different growth behaviors by scanning tunneling microscopy in combination with other methods. Interestingly, we obtained monolayer graphene on Ni(111), and multilayer graphene on Ni films under the same growth conditions. The possible mechanisms for the different growth behaviors are discussed. Especially, the effects of the inevitable Ni grain boundaries on polycrystalline Ni are addressed.

    

Reshaping the Tips of ZnO Nanowires by Pulsed Laser Irradiation

Xue Wang1,2 Yong Ding1, Dajun Yuan3, Jung-Il Hong1, Yan Liu1, C. P. Wong1, Chenguo Hu2, and Zhong Lin Wang1 ()

 

1 School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA

2 Department of Applied Physics, Chongqing University, Chongqing, 400044, China

3 Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332每0405, USA

DOI 10.1007/s12274-012-0222-5

Nano Res. 2012, 5(6): 412每420

Address correspondence to zlwang@gatech.edu

Single-crystalline hollow ZnO nanospheres can be decorated on pre-synthesized ZnO nanowires after a pulse of laser irradiation, and the surface wettability of ZnO nanowire array can be changed from the original hydrophilic to hydrophobic. Fine ZnO nanotips can be obtained on the tops of ZnO nanospheres after a re-growth procedure.

    

Formation of Free-Standing Carbon Nanotube Array on Super-Aligned Carbon Nanotube Film and Its Field Emission Properties

Peng Liu (), Yang Wei, Liang Liu, Kaili Jiang, and Shoushan Fan


Tsinghua每Foxconn Nanotechnology Research Center, Department of Physics, Tsinghua University, Beijing 100084, China

DOI 10.1007/s12274-012-0224-3

Nano Res. 2012, 5(6): 421每426

Address correspondence to liup01@mails.thu.edu.cn

Carbon nanotube array can be formed on the super-aligned carbon nanotube film on an 8-inch wafer. The combined carbon nanotube array on carbon nanotube film can realize the adsorbent-free field emission at only 10% duty heating.

    

Highly Flexible Transparent Film Heaters Based on Random Networks of Silver Nanowires

Caroline Celle (), C谷line Mayousse, El谷onore Moreau, Henda Basti, Alexandre Carella, and Jean-Pierre Simonato ()


CEA, LITEN / DTNM / LCRE, 17 rue des Martyrs, 38054 Grenoble, France

DOI 10.1007/s12274-012-0225-2

Nano Res. 2012, 5(6): 427每433

Address correspondence to Caroline Celle, caroline.celle@cea.fr; Jean-Pierre Simonato, jean-pierre.simonato@cea.fr

Flexible transparent thin film heaters (TTFHs) with excellent per- formances have been fabricated from solution-processable random networks of silver nanowires. The TTFHs can be fabricated on both glass and highly flexible polymer substrates. Heating performances were monitored at different applied voltages. The deposited silver amount necessary to fabricate TTFHs was estimated by inductively coupled plasma每optical emission spectroscopy measurements, and thermochromic displays have been realized.

    

Low-Cost Synthesis of Robust Anatase Polyhedral Structures with a Preponderance of Exposed {001} Facets for Enhanced Photoactivities

Yu Yu1,2, Changyan Cao1, Wei Li1, Ping Li1,2, Jin Qu1, and Weiguo Song1 ()


1 Beijing National Laboratory for Molecular Sciences (BNLMS), Laboratory for Molecular Nanostructures and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2 The Graduate University of the Chinese Academy of Sciences, Yuquanlu, Beijing 100049, China

DOI 10.1007/s12274-012-0226-1

Nano Res. 2012, 5(6): 434每442

Address correspondence to wsong@iccas.ac.cn

Anatase polyhedral structures with a high percentage of {001} facets have been synthesized by a low-cost route only using ammonium fluorotitanate ((NH4)2TiF6) and water as raw materials. All the samples exhibited high activities in the photocatalytic degradation of methylene blue dye under ultraviolet light irradiation.

    

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