Issue 12, 2012
From the journal:

Nanoscale

Gold nanoparticle-modulated conductivity in gold peapodded silica nanowires†

Sheng-Bo Wang,a   Ming-Shien Hu,b   Shoou Jinn Chang,a   Cheong-Wei Chong,cd   Hsieh-Cheng Han,e   Bohr-Ran Huang,f   Li-Chyong Chene  and  Kuei-Hsien Chen*be  

* Corresponding authors

a Institute of Microelectronics & Department of Electrical Engineering, Center for Micro/Nano Science and Technology, Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan, Taiwan

b Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan
E-mail: chenkh@pub.iams.sinica.edu.tw

c Department of Physics, National Taiwan University, Taipei, Taiwan

d Nano Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei, Taiwan

e Center for Condensed Matter Sciences, National Taiwan University, Taipei, Taiwan

f Institute of Electro-Optical Engineering Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan

Abstract

We report the enhanced electrical conductivity properties of single gold-peapodded amorphous silica nanowires synthesized using microwave plasma enhanced chemical vapor deposition. Dark conductivity of the gold-peapodded silica nanowires can be adjusted by controlling the number of incorporated metal nanoparticles. The temperature-dependent conductivity measurement reveals that the band tail hopping mechanism dominates the electron transport in the gold-peapodded silica nanowires. The high conductivity in the nano-peapodded nanowires with more embedded gold-nanoparticles can be explained by the higher density of hopping states and shorter hopping distance. These Au-embedded amorphous silica nanowires have provided a new approach to enhance not only the electron conduction, but also the chemical-sensor response/sensitivity.

Graphical abstract: Gold nanoparticle-modulated conductivity in gold peapodded silica nanowires

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Article information

DOI
https://doi.org/10.1039/C2NR30549F
Article type
Communication
Submitted
07 Mar 2012
Accepted
10 Apr 2012
First published
02 May 2012

Nanoscale, 2012,4, 3660-3664

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Gold nanoparticle-modulated conductivity in gold peapodded silica nanowires

S. Wang, M. Hu, S. J. Chang, C. Chong, H. Han, B. Huang, L. Chen and K. Chen, Nanoscale, 2012, 4, 3660 DOI: 10.1039/C2NR30549F

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