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Enhanced and tunable fluorescent quantum dots within a single crystal of protein

Hui Wei1, Stephen House2, Jiangjiexing Wu1,3, Jiong Zhang2, Zidong Wang2, Ying He2, Elizabeth J. Gao1, Yigui Gao4, Howard Robinson5, Wei Li3, Jianmin Zuo2 (), Ian M. Robertson2 (), and Yi Lu1,2 ()


1 Department of Chemistry, University of Illinois at Urbana-Champaign, Illinois 61801, USA
2 Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Illinois 61801, USA
3 Key Laboratory for Green Chemical Technology MOE, Tianjin University, Tianjin 300072, China
4 George L. Clark X-Ray Facility and 3M Materials Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
5 Department of Biology, Brookhaven National Laboratory, Upton, New York 11973, USA

DOI 10.1007/s12274-013-0348-0

Nano Research 2013, 6(9): 627每634

Address correspondence to Yi Lu, yi-lu@illinois.edu; Ian M. Robertson, ianr@illinois.edu; Jianmin Zuo, jianzuo@illinois.edu

We have developed a general approach to prepare fluorescent quantum dots within protein single crystals without disturbing the protein crystalline lattice. The quantum dots are three-dimensionally incorporated within the protein crystals, and their fluorescence properties are tunable.

    

Graphene-induced Pd nanodendrites: A high performance hybrid nanoelectrocatalyst

Subash Chandra Sahu1, Aneeya K. Samantara1, Ajit Dash1, R. R. Juluri2, Ranjan K. Sahu3, B. K. Mishra1, and Bikash Kumar Jena1 ()

 

1 Colloids & Materials Chemistry, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar-751013, India
2 Institute of Physics, Bhubaneswar-751005, India
3 Materials Science and Technology Division, National Metallurgical Laboratory, Jamshedpur-831007, India

DOI 10.1007/s12274-013-0339-1

Nano Research 2013, 6(9): 635每643

Address correspondence to bikash@immt.res.in

Graphene induces and plays a decisive role in shaping the dendrite morphology of Pd nanostructures formed on its surface. The synergetic effect of the graphene support and the dendrite morphologyof Pd nanostructures triggers the high electrocatalytic activity and the catalyst shows robust tolerance to surface poisoning.

    

Cotunneling transport in ultra-narrow gold nanowire bundles

Anaïs Loubat1,2, Walter Escoffier1, Lise-Marie Lacroix2, Guillaume Viau2, Reasmey Tan2, Julian Carrey2, B谷n谷dicte Warot-Fonrose3, and Bertrand Raquet1 ()


1 Laboratoire National des Champs Magn谷tiques Intenses, CNRS-INSA-UJF-UPS, UPR3228; 143 avenue de Rangueil, F-31400 Toulouse, France
2 Universit谷 de Toulouse, INSA, UPS, LPCNO (Laboratoire de Physique et Chimie des Nano-Objets), F-31077 Toulouse, France; CNRS; UMR5215; LPCNO, F-31077 Toulouse, France
3 Centre d*Elaboration de Mat谷riaux et d*Etudes Structurales, CNRS, 29 rue Jeanne Marvig, F-31077 Toulouse, France

DOI 10.1007/s12274-013-0340-8

Nano Research 2013, 6(9): 644每651

Address correspondence to Bertrand.Raquet@lncmi.cnrs.fr

Ultra-narrow (1.5 nm diameter) and long gold nanowires forming nanoscale bundles are connected to gold electrodes. The electronic transport is dominated by charging effects mediated by the temperature and the bias voltage. At low temperature, the current flow is governed by cooperative electron motions between the weakly coupled Au-nanowires. We extract a 1D localization length of the electronic wave function along the nanowires of the order of 120 nm, which is remarkably large, considering the ultra-narrow diameter of the wires. This result confirms the high crystallinity of the nanowires, in consistency with high resolution transmission electron microscopy.

    

Highly reactive, flexible yet green Se precursor for metal selenide nanocrystals: Se每octadecene suspension (Se每SUS)

Chaodan Pu, Jianhai Zhou, Runchen Lai, Yuan Niu, Wennuan Nan, and Xiaogang Peng ()


Center for Chemistry of Novel & High-Performance Materials, and Department of Chemistry, Zhejiang University, Hangzhou 310027, China

DOI 10.1007/s12274-013-0341-7

Nano Research 2013, 6(9): 652每670

Address correspondence to xpeng@zju.edu.cn

A powerful selenium precursor called Se每octadecene suspension (Se每SUS) was developed. Its high reactiviy, flexibility and less toxity made possible in synthesizing binary, core/shell, transition metal doped, and complex composition nanocrystals with unprecedented performance.

    

Clean transfer of graphene on Pt foils mediated by a carbon monoxide intercalation process

Donglin Ma1, Yanfeng Zhang1,2 (), Mengxi Liu1, Qingqing Ji1, Teng Gao1, Yu Zhang1,2, and Zhongfan Liu1 ()


1 Center for Nanochemistry (CNC), Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
2 Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China

DOI 10.1007/s12274-013-0342-6

Nano Research 2013, 6(9): 671每678

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

CO intercalation into graphene on Pt foils has been studied under ambient conditions and this phenomenon has been utilized to develop a new clean method for the transfer of graphene onto arbitrary substrates.

    

Spinel LiNi0.5Mn1.5O4 cathode for rechargeable lithium- ion batteries: Nano vs micro, ordered phase (P4332) vs disordered phase (Fd-3m)

Jingang Yang, Xiaopeng Han, Xiaolong Zhang, Fangyi Cheng (),  and Jun Chen


Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China

DOI 10.1007/s12274-013-0343-5

Nano Research 2013, 6(9): 679每687

Address correspondence to fycheng@nankai.edu.cn

A systematic investigation of the synergic effects of phase and particle size on the electrochemical performances of spinel LiNi0.5Mn1.5O4 (LNMO) indicates that a microsized disordered phase and a nanosized ordered phase of LNMO exhibit the best combination of rate capability and cyclability.

    

In situ Raman spectroscopy of topological insulator Bi2Te3 films with varying thickness

Chunxiao Wang1,2, Xiegang Zhu1, Louis Nilsson3, Jing Wen1, Guang Wang1, Xinyan Shan1, Qing Zhang1, Shulin Zhang2 (), Jinfeng Jia1,4 (), and Qikun Xue1


1 State Key Laboratory for Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
2 Department of Physics, Peking University, Beijing 100871, China
3 Department of Physics and Astronomy and Interdisciplinary Nanoscience Center, Aarhus University, 8000 Aarhus C, Denmark
4 Department of Physics, Shanghai Jiaotong University, Shanghai 200240, China

DOI 10.1007/s12274-013-0344-4

Nano Research 2013, 6(9): 688每692

Address correspondence to Shulin Zhang, slzhang@pku.edu.cn; Jinfeng Jia, jfjia@sjtu.edu.cn

Raman spectra of topological insulator Bi2Te3 films prepared by molecular beam epitaxy (MBE) have been measured by an in situ ultrahigh vacuum (UHV)每MBE每Raman spectroscopy system. When the thickness of the Bi2Te3 films decreases from 40 quintuple-layers (QL) to 1 QL, the spectral characteristics of some Raman modes appearing in the spectrum of bulk Bi2Te3 vary, and a new vibrational mode appears.

    

Enzyme-directed pH-responsive exfoliation and dispersion of graphene and its decoration by gold nanoparticles for use as a hybrid catalyst

Konggang Qu, Li Wu, Jinsong Ren, and Xiaogang Qu ()

 

Laboratory of Chemical Biology, Division of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun, Jilin 130022, China

DOI 10.1007/s12274-013-0345-3

Nano Research 2013, 6(9): 693每702

Address correspondence to xqu@ciac.jl.cn

A pH-responsive water-dispersible method for the exfoliation and functionalization of graphene by using lysozyme is presented. The pH-responsive dispersion of graphene may be useful for the construction of a reversible controlled release system. More importantly, a hybrid catalyst constructed through the interactions between disulphide groups in lysozyme and gold nanoparticles shows excellent catalytic activity towards the reduction of o-nitroaniline by NaBH4.

    

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