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One-Dimensional ZnO Nanostructures: Solution Growth and Functional Properties

Sheng Xu and Zhong Lin Wang ()

 

School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, USA

DOI 10.1007/s12274-011-0160-7

2011,4(11):1013-1098

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

This article gives a comprehensive review of the growth control and functional applications of one dimensional ZnO nanostructures prepared by wet chemical approaches.

    

From Proton Conductive Nanowires to Nanofuel Cells: A Powerful Candidate for Generating Electricity for Self-Powered Nanosystems

Caofeng Pan, Jun Luo, and Jing Zhu ()


Beijing National Center for Electron Microscopy, Laboratory of Advanced Materials, State Key Laboratory of New Ceramics and Fine Processing, Department of Material Science and Engineering, Tsinghua University, Beijing 100084, China

DOI 10.1007/s12274-011-0164-3

2011,4(11):1099-1109

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

Nanofuel and nanobiofuel cells which are integrated on an individual proton conductor nanowire represent a new self-powering approach in nanotechnology, and their power output is high enough to drive nanodevices for performing self- powered sensing. This study shows the feasibility of building self-powered nanosystems for biological sciences, environmental monitoring, defense technology, and even personal electronics.

    

Temperature-Dependent Photoconductance of Heavily Doped ZnO Nanowires

Dongdong Li1, Liang Zhao1, Ruqian Wu2, Carsten Ronning3, and Jia G. Lu1 ()


1 Departments of Physics and Electrophysics, University of Southern California, Los Angeles, CA 90089, USA
2 Department of Physics, University of California, Irvine, CA 92697, USA
3 Institute of Solid State Physics, University of Jena, D-07743, Germany

DOI 10.1007/s12274-011-0158-1

2011,4(11):1110-1116

Address correspondence to jia.grace.lu@usc.edu

A semiconductor-to-metal transition is observed in Ga-doped ZnO nanowires under UV excitation due to enhanced Coulomb interaction and surface scattering associated with size confinement. As the temperature is varied, two distinct resistance peaks are observed. This originates from the trapping and detrapping processes in localized impurity states.

    

Convective Assembly of Linear Gold Nanoparticle Arrays at the Micron Scale for Surface Enhanced Raman Scattering

Lihua Qian1,†() and Ronobir Mookherjee1,2
 
1 Nevada Nanotechnology Center, Howard R. Hughes College of Engineering, University of Nevada, Las Vegas, Nevada 89154-4026, USA
2 Advanced Technologies Academy, 2501 Vegas Drive, Las Vegas, NV 89106, USA
 Present address: School of Physics, Huazhong University of Science and Technology, 430074, Wuhan, China

DOI 10.1007/s12274-011-0159-0

2011,4(11):1117-1128

Address correspondence to lhqian@mail.hust.edu.cn, lh_qian@hotmail.com

A technique to assemble linear nanoparticle arrays with clean surfaces has been developed. The majority of the gaps between adjacent nanoparticles are several nm in size, making these arrays promising candidates for use as substrates for surface enhanced Raman scattering.

    

Enhanced Electrical Properties in Carbon Nanotube/Poly (3-hexylthiophene) Nanocomposites Formed Through Non-Covalent Functionalization

Sung Hye Park1, Sung Hwan Jin1, Gwang Hoon Jun1, Seokwoo Jeon1 (), and Soon Hyung Hong1 ()
 
Department of Material Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea

DOI 10.1007/s12274-011-0161-6

2011,4(11):1129-1135

Address correspondence to Seokwoo Jeon, jeon39@kaist.ac.kr; Soon Hyung Hong, shhong@kaist.ac.kr

Carbon nanotubes (CNTs) non-covalently functionalized by modified pyrene molecules with long alkyl chains become sufficiently hydrophobic to be well dispersed in poly(3-hexylthiophene) (P3HT). Organic thin-film transistors (OTFTs) made from such non-covalently functionalized CNT/P3HT nanocomposites with only 0.25 wt% addition of CNTs show 15 times enhancement of field effect mobility (1.5 ℅ 10每2 cm2/(V•s)) compared to the mobility of OTFTs made from pure P3HT.

    

Fabrication of Large Area High Density, Ultra-Low Reflection Silicon Nanowire Arrays for Efficient Solar Cell Applications

Subramani Thiyagu, B. Parvathy Devi, and Zingway Pei ()


Graduate Institute of Optoelectronic Engineering, Department of Electrical Engineering, Chung Hsing University, Taichung 40227, Taiwan, China

DOI 10.1007/s12274-011-0162-5

2011,4(11):1136-1143

Address correspondence to zingway.pei@gmail.com

High density vertically aligned and high aspect ratio silicon nanowire (SiNW) arrays have been successfully fabricated on a Si substrate and exhibit ultra-low reflection and self-cleaning properties. A SiNW/poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (SiNW/PEDOT:PSS) heterojunction solar cell exhibits high photocurrent demonstrating the advantages of the SiNWs over a planar Si surface.

    

A High Performance Cobalt-Doped ZnO Visible Light Photocatalyst and Its Photogenerated Charge Transfer Properties

Yongchun Lu1, Yanhong Lin1 (), Dejun Wang1 (), Lingling Wang1, 2, Tengfeng Xie1, and Tengfei Jiang1
 
1 State Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
2 State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China

DOI 10.1007/s12274-011-0163-4

2011,4(11):1044-1152

Address correspondence to Yanhong Lin, linyh@jlu.edu.cn; Dejun Wang, wangdj@jlu.edu.cn

Surface photovoltage measurements on cobalt-doped ZnO revealed that an electronic interaction was formed between the Co and ZnO, and that the incorporation of Co promoted the charge separation and enhanced the charge transfer ability and, at the same time, effectively inhibited the recombination of photogenerated charge carriers in ZnO, resulting in highly efficient photocatalytic activity in the degradation of alizarin red under visible light irradiation ( > 420 nm).

    

Aqueous-Phase Synthesis of Ag每TiO2每Reduced Graphene Oxide and Pt每TiO2每Reduced Graphene Oxide Hybrid Nanostructures and Their Catalytic Properties

Ping Wang, Lei Han, Chengzhou Zhu, Yueming Zhai, and Shaojun Dong ())
 
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

DOI 10.1007/s12274-011-0165-2

2011,4(11):1153-1162

Address correspondence to dongsj@ciac.jl.cn

Ag每TiO2每reduced graphene oxide (rGO) and Pt每TiO2每rGO with particles well dispersed on rGO have been successfully synthesized by an aqueous solution-based method. The catalytic activity of the resulting products was studied by using the reduction of p-nitrophenol by NaBH4 as a model system. It was found that the Pt每TiO2每rGO nanostructure exhibits higher catalytic activity than Ag每TiO2每rGO or TiO2每rGO. Furthermore, it also exhibits excellent stability and easy recyclability, indicating great potential for applications in catalysis.

    

Targeted Blue Nanoparticles as Photoacoustic Contrast Agent for Brain Tumor Delineation

Aniruddha Ray1, Xueding Wang2 (), Yongeun Koo Lee3, Hoe Jin Hah3, Gwangseong Kim3, Thomas Chen4, Daniel A. Orringer4, Oren Sagher4, Xiaojun Liu5, and Raoul Kopelman1,3 ()


1 Biophysics, University of Michigan, Ann Arbor, MI, USA
2 Department of Radiology, University of Michigan, Ann Arbor, MI, USA
3 Department of Chemistry, University of Michigan, Ann Arbor, MI, USA
4 Department of Neurosurgery, University of Michigan, Ann Arbor, MI, US
5 Institute of Acoustics, Nanjing University, Nanjing, China

DOI 10.1007/s12274-011-0166-1

2011,4(11):1163-1173

Address corresponding to Raoul Kopelman, kopelman@umich.edu; Xueding Wang, xdwang@umich.edu

A highly sensitive photoacoustic imaging technique, that is enhanced by tumor-targeting blue nanoparticles serving as a contrast agent,has been used to delineate brain tumors. Ex vivo experiments on phantoms and on rat brains demonstrate the high sensitivity of photoacoustic imaging in delineating tumors containing contrast agent at a concentration much lower than needed for visualization by the naked eye.

    

Semiconducting Carbon Nanotube/Fullerene Blended Heterojunctions for Photovoltaic Near-Infrared Photon Harvesting

Dominick J. Bindl, Adam S. Brewer, and Michael S. Arnold (),
 
1509 University Ave., Materials Science and Engineering Dept., University of Wisconsin每Madison, Madison WI 53706, USA

DOI 10.1007/s12274-011-0167-0

2011,4(11):1174-1179

Address correspondence to msarnold@wisc.edu

Bulk heterojunction photovoltaic devices have been fabricated utilizing blends of polymer-wrapped semiconducting carbon nanotubes with the fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester. Measured near-infrared power conversion efficiencies were in excess of 1.3% with peak external quantum efficiencies approaching 20%.

    

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