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Simultaneous Growth Mechanisms for Cu-Seeded InP Nanowires

Karla Hillerich1 (), Kimberly A. Dick1,2, Maria E. Messing1, Knut Deppert1, and Jonas Johansson1 ()

1 Solid State Physics, Lund University, Box 118, SE-22100 Lund, Sweden
2 Polymer and Materials Chemistry, Lund University, Box 124, SE-22100 Lund, Sweden

DOI 10.1007/s12274-012-0210-9

Nano Res. 2012, 5(5): 297每306

Address correspondence to Karla Hillerich, karla.hillerich@ftf.lth.se; Jonas Johansson, jonas.johansson@ftf.lth.se

Two growth regimes are observed for the growth of Cu-seeded InP nanowires: At higher m/k ratios the nanowires grow via a solid particle, whilst at lower m/k ratios growth via solid and via liquid particles occurs simultaneously. The state of the particle is believed to change dynamically between the two states depending on the momentary composition of the particle.

    

Effect of Carbon Nanotube Network Morphology on Thin Film Transistor Performance

Marina Y. Timmermans1 (), David Estrada2, Albert G. Nasibulin1 (), Joshua D. Wood2,3, Ashkan Behnam2, Dong-ming Sun4, Yutaka Ohno4, Joseph W. Lyding2,3, Abdou Hassanien5,6, Eric Pop2,3, and Esko I. Kauppinen1 ()

1 NanoMaterials Group, Department of Applied Physics & Center for New Materials, Aalto University, 00076 Espoo, Finland
2 Department of Electrical & Computer Eng., Micro & Nanotechnology Lab, University of Illinois, Urbana, IL 61801, USA
3 Beckman Institute, University of Illinois, Urbana, IL 61801, USA
4 Department of Quantum Engineering, Nagoya University, Nagoya 464-8603, Japan
5 National Institute of Chemistry, 19 Hajdrihova, 1000 Ljubljana, Slovenia
6 Electronics and Photonics Research Institute, AIST, 1-1-1 Umezono, Tsukuba, Ibaraki ken 305-8568, Japan

DOI 10.1007/s12274-012-0211-8

Nano Res. 2012, 5(5): 307每319

Address correspondence to Marina Y. Timmermans, marina.timmermans@aalto.fi; Albert G. Nasibulin, albert.nasibulin@aalto.fi; Esko I. Kauppinen, esko.kauppinen@aalto.fi

The role of the carbon nanotube (CNT) network morphology in the transport properties of CNT thin film transistors is presented. The CNT network morphology is reproducibly altered by using four different CNT deposition methods, applied directly after CNT synthesis by the aerosol chemical vapor deposition (CVD) method without additional process steps. A novel approach to prepare high-performance partially aligned CNT networks is shown.

    

Polyol Synthesis and Chemical Conversion of Cu2O Nanospheres

Wei Chen1, Lingling Li2, Qing Peng2, and Yadong Li2 ()

1 Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Wenzhou 325027, China
2 Department of Chemistry, Tsinghua University, Beijing 100084, China

DOI 10.1007/s12274-012-0212-7

Nano Res. 2012, 5(5): 320每326

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

We have demonstrated that polyol synthesis route, which is a popular and effective way of synthesizing noble metal nanocrystals, is also a powerful method for the size-controlled synthesis of Cu2O nanostructures. The resulting Cu2O nanospheres are ideal solid precursors for the production of CuxS and CuO with retention of the spherical shape, via suitable chemical conversion.

    

Surface Tuning for Promoted Charge Transfer in Hematite Nanorod Arrays as Water-Splitting Photoanodes

Shaohua Shen1,2 (), Coleman X. Kronawitter2, Jiangang Jiang1, Samuel S. Mao2, and Liejin Guo1 ()

1 International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi*an Jiaotong University, Shaanxi 710049, China
2 Department of Mechanical Engineering, University of California at Berkeley, Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

DOI 10.1007/s12274-012-0213-6

Nano Res. 2012, 5(5): 327每336

Address correspondence to Shaohua Shen, shshen_xjtu@mail.xjtu.edu.cn; Liejin Guo, lj-guo@mail.xjtu.edu.cn

The highly correlative relationship between photoluminescence intensity and photoelectrochemical performance, depending on dopant concentration, suggests that dopants promote charge transfer and hence the photoelectrochemical water-splitting performance of hematite (汐-Fe2O3) nanorod films with the surface tuned by W6+ doping.

    

Uniform Thickness and Colloidal-Stable CdS Quantum Disks with Tunable Thickness: Synthesis and Properties

Zheng Li1, Haiyan Qin2, Dorel Guzun3, Mourad Benamara3, Gregory Salamo3, and Xiaogang Peng2 ()


1 Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701, USA
2 Department of Chemistry, Zhejiang University, Hangzhou 310027, China
3 Department of Physics, University of Arkansas, Fayetteville, AR 72701, USA

DOI 10.1007/s12274-012-0214-5

Nano Res. 2012, 5(5): 337每351

Address correspondence to xpeng@zju.edu.cn

Uniform thickness and colloidal-stable CdS quantum disks have been reproducibly prepared using cadmium acetate, elemental sulfur, fatty acids and octadecene as the starting materials without any size/shape sorting. The thickness was varied between 1.2 and 2.2 nm, i.e., 4.5, 5.5, 6.5 and 7.5 monolayers of CdS unit along the thickness direction.

    

An Exchange Intercalation Mechanism for the Formation of a Two-Dimensional Si Structure Underneath Graphene

Yi Cui1, Junfeng Gao2, Li Jin1, Jijun Zhao2, Dali Tan1, Qiang Fu1(), and Xinhe Bao1()

1 State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, the Chinese Academy of Sciences, Dalian 116023, China
2 Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China

DOI 10.1007/s12274-012-0215-4

Nano Res. 2012, 5(5): 352每360

Address correspondence to Qiang Fu, qfu@dicp.ac.cn; Xinhe Bao, xhbao@dicp.ac.cn

A Si每C exchange mechanism has been shown to facilitate the penetration of Si atoms through a monolayer graphene lattice and form a two-dimensional Si layer between the graphene overlayer and the metal substrate.

    

A Molecular Understanding of the Gas-Phase Reduction and Doping of Graphene Oxide

Shenglong Xu1,2,3, Jiawei Dong2, Lijia Pan1, Xifeng Que2, Youdou Zheng1, Yi Shi1(), and Xinran Wang1 ()

1 National Laboratory of Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
2 School of Physics, Nanjing University, Nanjing 210093, China
3 Department of Physics, Ohio State University, Columbus, Ohio 43210, USA

DOI 10.1007/s12274-012-0216-3

Nano Res. 2012, 5(5): 361每368

Address correspondence to Xinran Wang, xrwang@nju.edu.cn; Yi Shi, yshi@nju.edu.cn

Molecular dynamics simulations show that ammonia can efficiently reduce and n-dope graphene oxide.

    

Hierarchical Co3O4@Ni每Co每O Supercapacitor Electrodes with Ultrahigh Specific Capacitance per Area

Zhiyi Lu, Qiu Yang, Wei Zhu, Zheng Chang, Junfeng Liu, Xiaoming Sun (*), David G. Evans, and Xue Duan


State Key Laboratory of Chemical Resource Engineering, P.O. Box 98, Beijing University of Chemical Technology, Beijing 100029, China

DOI 10.1007/s12274-012-0217-2

Nano Res. 2012, 5(5): 369每378

Address correspondence to sunxm@mail.buct.edu.cn

Ternary ordered hierarchical Co3O4@Ni每Co每O nanosheet每nanorod arrays show excellent electrochemical performance as a supercapacitor electrode. At a current density of 5 mA/cm2, the electrodes have both high mass loading per area (12 mg/cm2) and high efficiency of 2098 F/g, giving specific capacitances per area as high as ~25 F/cm2.

    

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