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Thickness-dependent patterning of MoS2 sheets with well-oriented triangular pits by heating in air

Haiqing Zhou1,2, Fang Yu5, Yuanyue Liu3,4, Xiaolong Zou3,4, Chunxiao Cong1, Caiyu Qiu1, Ting Yu1 (), Zheng Yan2, Xiaonan Shen1, Lianfeng Sun5, Boris I. Yakobson2,3,4 (), and James M. Tour2,3,4 ()


1 Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
2 Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, USA
3 The Smalley Institute for Nanoscale Science and Technology, Rice University, 6100 Main Street, Houston, Texas 77005, USA
4 Department of Mechanical Engineering and Materials Science, Rice University, 6100 Main Street, Houston, Texas 77005, USA
5 National Center for Nanoscience and Technology, Beijing 100190, China

DOI 10.1007/s12274-013-0346-2

Nano Research 2013, 6(10): 703每711

Address correspondence to James M. Tour, tour@rice.edu; Ting Yu, yuting@ntu.edu.sg; Boris I. Yakobsen, biy@rice.edu

Via anisotropic oxidative etching, ultrathin MoS2 sheets can be etched and patterned with well-oriented equilateral triangular pits by simply heating the samples in air, a process that is greatly affected by the surrounding temperature and the number of MoS2 layers. Additionally, first-principles computations have been performed to explain the formation mechanism of the triangular pits.

    

On-chip isotachophoresis separation of functional DNA origami capture nanoarrays from cell lysate

Qian Mei1, Roger H. Johnson1, Xixi Wei2,3, Fengyu Su1, Yan Liu2,3, Laimonas Kelbauskas1, Stuart Lindsay2,3,4, Deirdre R. Meldrum1  (), and Hao Yan2,3  ()


1 Center for Biosignatures Discovery Automation, Arizona State University, Tempe, AZ 85287, USA
2 Center for Single Molecule Biophysics, Arizona State University, Tempe, AZ 85287, USA
3 Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287, USA
4 Department of Physics, Arizona State University, Tempe, AZ 85287, USA

DOI 10.1007/s12274-013-0347-1

Nano Research 2013, 6(10): 712每719

Address correspondence to Hao Yan, Hao.Yan@asu.edu; Deirdre R. Meldrum, Deirdre.Meldrum@asu.edu

Our study demonstrates an innovative approach whereby DNA origami binding assay for fast detection of protein in cell lysate using microfluidic isotachophoresis (米-ITP). 米-ITP and DNA nanoarrays can be easily coupled to other microchip pre- and post-processing steps to provide an integrated platform for clinic diagnostics.

    

Light-controlled synthesis of uniform platinum nanodendrites with markedly enhanced electrocatalytic activity

Weifeng Si1,2,∫, Jia Li1,3,∫, Huanqiao Li1, Shushuang Li1, Jie Yin4, Huan Xu2, Xinwen Guo3, Tao Zhang4, and Yujiang Song1 ()


1 Dalian National Laboratories for Clean Energy (DNL), Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
2 School of Chemistry and Chemical Engineering, Liaoning Normal University, 850 Huanghe Road, Dalian 116029, China
3 State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
4 State Key Laboratory of Catalysis, DICP, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
These two authors contributed equally to this work

DOI 10.1007/s12274-013-0349-z

Nano Research 2013, 6(10): 720每725

Address correspondence to yjsong@dicp.ac.cn

We report a fast in situ seeding approach based on zinc(II) porphyrin (ZnP) under white light irradiation, leading to uniform spherical platinum nanodendrites with tunable sizes. The platinum nanodendrites exhibit significantly improved electrocatalytic activities toward oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR) compared with commercial platinum black.

    

Robust superhydrophobicity of hierarchical ZnO hollow microspheres fabricated by two-step self-assembly

Ziqi Sun1, Ting Liao2, Kesong Liu3 (), Lei Jiang4, Jung Ho Kim1 (), and Shi Xue Dou1


1 Institute for Superconducting and Electronic Materials, University of Wollongong, Innovation Campus, North Wollongong, NSW 2500, Australia
2 Australian Institute for Bioengineering and Nanotechnology, the University of Queensland, St Lucia, QLD 4072, Australia
3 Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191, China
4 Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China

DOI 10.1007/s12274-013-0350-6

Nano Research 2013, 6(10): 726每735

Address correspondence to Jung Ho Kim, jhk@uow.edu.au; Kesong Liu, liuks@buaa.edu.cn

Hierarchical ZnO hollow microspheres with designed constituent architectures have been synthesized via a two-step self-assembly approach, and present robust superhydrophobicity comparing to those synthesized via the traditional one-step synthesis. After surface modification by perfluorinated silane, the two-step synthesized ZnO hollow microsphere thin films exhibited environmentally durable superhydrophobicity under long-time UV irradiation.

    

Evidence for structural phase transitions and large effective band gaps in quasi-metallic ultra-clean suspended carbon nanotubes

Shun-Wen Chang1 (), Rohan Dhall2, Moh Amer2, Kentaro Sato4, Riichiro Saito4, and Stephen Cronin1,2,3


1 Department of Physics and Astronomy, University of Southern California, Los Angeles, CA 90089, USA
2 Department of Electrical Engineering, University of Southern California, Los Angeles, CA 90089, USA
3 Department of Chemistry, University of Southern California, Los Angeles, CA 90089, USA
4 Department of Physics, Tohoku University, Sendai 980-8578, Japan

DOI 10.1007/s12274-013-0351-5

Nano Research 2013, 6(10): 736每744

Address correspondence to Shunwenc@usc.edu

A pronounced M-shape profile in the gate dependence of the 2D band Raman frequency of the individual suspended carbon nanotube indicates a structural phase transition.

    

Functionalization of high-moment magnetic nanodisks for cell manipulation and separation

Mingliang Zhang1, Christopher M. Earhart1, Chinchun Ooi1, Robert J. Wilson1, Mary Tang2, and Shan X. Wang1,2 ()

1 476 Lomita Mall, Department of Materials Science and Engineering, Stanford University, Stanford 94305, USA
2 350 Serra Mall, Department of Electrical Engineering, Stanford University, Stanford 94305, USA

DOI 10.1007/s12274-013-0352-4

Nano Research 2013, 6(10): 745每751

Address correspondence to sxwang@stanford.edu

High-moment synthetic antiferromagnetic nanoparticles have been covalently bound with streptavidin to facilitate specific binding to H1650 lung cancer cells which have been conjugated with biotin. Once coated with particles, these cells can be easily manipulated under an external magnetic field and be ※identified§ and ※picked-up§ when spiked into a blood sample.

    

Large-energy-shift photon upconversion in degenerately doped InP nanowires by direct excitation into the electron gas

Kilian Mergenthaler1, Azhar Iqbal2, Jesper Wallentin1, Sebastian Lehmann1, Magnus T. Borgström1, Lars Samuelson1, Arkady Yartsev2, and Mats-Erik Pistol1 ()


1 Solid State Physics/The Nanometer Structure Consortium, Lund University, P. O. Box 118, SE-221 00 Lund, Sweden
2 Division of Chemical Physics, Lund University, P. O. Box 118, SE-221 00 Lund, Sweden

DOI 10.1007/s12274-013-0353-3

Nano Research 2013, 6(10): 752每757

Address correspondence to mats-erik.pistol@ftf.lth.se

We demonstrate photon upconversion in single degenerately n-doped InP nanowires by direct excitation into the electron gas.

    

Enhanced performance of GaN nanobelt-based photodetectors by means of piezotronic effects

Ruomeng Yu1,∫, Caofeng Pan2,∫, Youfan Hu1, Lin Li3, Hongfei Liu4, Wei Liu5, Soojin Chua4, Dongzhi Chi4, and Zhong Lin Wang1,2 ()


1 School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, USA
2 Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, China
3 School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
4 Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology, and Research), Singapore 117602, Singapore
5 School of Electrical and Electronic Engineering, Luminous! Center of Excellence for Semiconductor Lighting and Display, Nanyang Technology University, Singapore 639798, Singapore
These authors contributed equally to this work.

DOI 10.1007/s12274-013-0354-2

Nano Research 2013, 6(10): 758每766

Address correspondence to zhong.wang@mse.gatech.edu

Piezotronic effects have been employed to tune the Schottky barrier height (SBH) at local contacts and hence enhance the performances of Schottky-contacted metal每semiconductor每metal (MSM) structured GaN nanobelt (NB) based photodetectors.

    

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