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Role of Catalysts in the Surface Synthesis of Single-Walled Carbon Nanotubes

Weiwei Zhou, Lei Ding, and Jie Liu £¨£©

 

Department of Chemistry, Duke University, Durham, NC 27708, USA

DOI 10.1007/s12274-009-9068-x

Nano Res (2009)2:593-598

Address correspondence to j.liu@duke.edu

Catalysts are of key importance in the surface growth of singlewalled carbon nanotubes; they should be monodisperse on the surface of substrates, matched with the feeding rate of carbon, and have appropriate interactions with the substrates.

    

Selective Suspension in Aqueous Sodium Dodecyl Sulfate According to Electronic Structure Type Allows Simple Separation of Metallic from Semiconducting Single-Walled Carbon Nanotubes

Kai Moshammer1, Frank Hennrich1 £¨£©, and Manfred M.

Kappes1,2 £¨£©


1 Forschungszentrum Karlsruhe, Institut f¨¹r Nanotechnologie, D-76021 Karlsruhe, Germany
2 Institut f¨¹r Physikalische Chemie, Universität Karlsruhe, D-76128 Karlsruhe, Germany

DOI 10.1007/s12274-009-9057-0

Nano Res (2009)2:599-606

Address correspondence to Frank Hennrich, Frank.Hennrich@int.fzk.de; Manfred M. Kappes, Manfred.Kappes@chemie.uni-karlsruhe.de

Electrophoresis (EP), density gradient centrifugation (DGC) and size exclusion chromatography (SEC) allow bulk scale separation of metallic (m-) from semiconducting (s-) single-walled carbon nanotubes (SWNTs), but all rely on starting suspensions in which SWNT dispersion is already selective with respect to electronic structure type. Suspensions in sodium dodecyl sulfate/D2O contain long bundles comprising preferentially s-SWNTs as well as shorter individual tubes consisting of predominantly m-SWNTs.

    

Core-Shell Au-Ag Nanoparticles in Dielectric Nanocomposites with Plasmon-Enhanced Fluorescence: A New Paradigm in Antimony Glasses

Tirtha Som and Basudeb Karmakar £¨£©


Glass Technology Laboratory, Glass Division, Central Glass and Ceramic Research Institute (Council of Scientifi c and Industrial Research), 196, Raja S. C. Mullick Road, Kolkata 700 032, India

DOI 10.1007/s12274-009-9061-4

Nano Res (2009)2:607-616

Address correspondence to basudebk@cgcri.res.in

Core-shell bimetallic (Au0-Ag0) nanoparticles (28-89 nm) embedded within a new glass (dielectric) matrix, K2O B2O3 Sb2O3 (KBS) have been fabricated by a single-step melt-quench methodology. The enhancement of photoluminescence upconversion of Sm3+ ions by Au Ag core-shell nanoparticles is found to be ~2 folds.

    

Design of a Carbon Nanotube/Magnetic Nanoparticle-Based Peroxidase-Like Nanocomplex and Its Application for Highly Effi cient Catalytic Oxidation of Phenols

Xiaolei Zuo, Cheng Peng, Qing Huang, Shiping Song, Lihua Wang, Di Li, and Chunhai Fan £¨£©


Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China

DOI 10.1007/s12274-009-9062-3

Nano Res (2009)2:617-623

Address correspondence to fchh@sinap.ac.cn

A magnetic nanoparticle and multi-walled carbon nanotube-based nanocomplex for highly effi cient phenol oxidative degradation.

    

Equilibrium Piezoelectric Potential Distribution in a Deformed ZnO Nanowire

Giulia Mantini1,2, Yifan Gao1, A. DʼAmico2, C. Falconi2, and Zhong Lin Wang1 £¨£©
1 School of Materials Science and Engineering, Georgia Institute of Technology, Atlan

ta, Georgia 30332-0245, USA
2 Department of Electronic Engineering, University of Tor Vergata, Via del Politecnico 1, 00133 Roma, Italy

DOI 10.1007/s12274-009-9063-2

Nano Res (2009)2:624-629

Address correspondence to zlwang@gatech.edu

The equilibrium piezoelectric potential distribution in a deformed ZnO semiconductive nanowire has been systematically investigated in order to reveal its dependence on the donor concentration, applied force, and geometric parameters. In particular, the donor concentration significantly affects the magnitude and distribution of the electric potential. At a donor concentration of ND > 1018 cm¨C3, the piezopotential is almost entirely screened.

    

Tuning Reaction Processes for the Synthesis of Micron and Nanometer Sized, Single Crystalline Lamellae of Copper 7,7,8,8-tetracyano-p-quinodimethane (Phase II) with Large Area

Yaling Liu1,2, Zhuoyu Ji1,3, Hongxiang Li1£¨£©, Wenping Hu1£¨£©, Yunqi Liu1, and Daoben Zhu1


1
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2 National Center for Nanoscience and Technology, Beijing 100190, China
3 Department of Compound Semiconductor Devices and Circuit, Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China

DOI 10.1007/s12274-009-9065-0

Nano Res (2009)2:630-637

Address correspondence to Hongxiang Li, lhx@iccas.ac.cn; Wenping Hu, huwp@iccas.ac.cn

Two simple methods have been developed to obtain large area, single crystalline lamellae of CuTCNQ, which suggests bright prospects for the study and understanding of the electrical switching of CuTCNQ and its future applications in memory and switching devices.

    

Functionalization of Single- and Multi-Walled Carbon Nanotubes with Cationic Amphiphiles for Plasmid DNA Complexation and Transfection

Cyrille Richard£¨£©, Nathalie Mignet, C¨¦line Largeau, Virginie Escriou, Michel Bessodes, and Daniel Scherman


1 Unit¨¦ de Pharmacologie Chimique et G¨¦n¨¦tique,CNRS, UMR 8151, Paris, F-75270 cedex France
2 INSERM, U 640, Paris, F-75270 cedex France
3 Universit¨¦ Paris Descartes, Facult¨¦ des Sciences Pharmaceutiques et Biologiques, Paris, F-75270 cedex France
4 ENSCP, Paris, F-75231 cedex France

DOI 10.1007/s12274-009-9066-z

Nano Res (2009)2:638-647

Address correspondence to cyrille.richard@parisdescartes.fr

Carbon nanotubes (SWNT or MWNT) have been functionalized by two types of cationic amphiphiles (lipid or aromatic cationic), complexed with plasmid DNA and incubated with B16 cells. The results show that the transfection effi ciencies are dependent on the type of both nanotube and amphiphile used.

    

Silicon-Based Molecular Switch Junctions

Daijiro Nozaki and Gianaurelio Cuniberti£¨£©


Institute for Material Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, D-01062 Dresden, Germany

DOI 10.1007/s12274-009-9067-y

Nano Res (2009)2:648-659

Address correspondence to g.cuniberti@tu-dresden.de

Molecular switches with bistable characteristics can be expected to work as the ultimate switching components for molecular data storage. Here we demonstrate the feasibility of this concept by modeling molecular switch junctions based on azobenzene derivatives clamped to silicon contacts. By employing molecular dynamics and non-equilibrium Green function techniques we demonstrate that very large on¨Coff ratios can be attained even under ambient conditions.

    

CO Dissociation and CO+O Reactions on a Nanosized Iron Cluster

Giorgio Lanzani1, Albert G. Nasibulin2, Kari Laasonen1£¨£©, and Esko I. Kauppinen2£¨£©


1 Department of Chemistry, P.O. Box 3000, FIN-90014 University of Oulu, Finland
2 Department of Applied Physics and Center for New Materials, Helsinki University of Technology, P.O. Box 5100, FIN-02150 Espoo, Finland

DOI 10.1007/s12274-009-9069-9

Nano Res (2009)2:660-670

Address correspondence regarding the computational part to Kari Laasonen, Kari.Laasonen@oulu.fi; address correspondence regarding the CVD part to Esko I. Kauppinen, Esko.Kauppinen@hut.fi

The mechanism of CO disproportionation on an isolated Fe55 cluster has been investigated by fi rst principles electronic structure calculations.

    

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