Low-Temperature Rapid Fabrication of ZnO Nanowire UV Sensor Array by Laser-Induced Local Hydrothermal Growth

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We demonstrate ZnO nanowire based UV sensor by laser-induced hydrothermal growth of ZnO nanowire. By inducing a localized temperature rise using focused laser, ZnO nanowire array at similar to 15 mu m size consists of individual nanowires with similar to 8 mu m length and 200 similar to 400 nm diameter is readily synthesized on gold electrode within 30 min at the desired position. The laser-induced growth process is consecutively applied on two different points to bridge the micron gap between the electrodes. The resultant photoconductive ZnO NW interconnections display 2 similar to 3 orders increase in the current upon the UV exposure at a fixed voltage bias. It is also confirmed that the amount of photocurrent can be easily adjusted by changing the number of ZnO NW array junctions. The device exhibits clear response to the repeated UV illumination, suggesting that this process can be usefully applied for the facile fabrication of low-cost UV sensor array.
Publisher
HINDAWI PUBLISHING CORPORATION
Issue Date
2013
Language
English
Article Type
Article
Keywords

SENSITIZED SOLAR-CELLS; SOLID MECHANISM; PHOTODETECTORS; ENHANCEMENT; DEVICES; NANOROD

Citation

JOURNAL OF NANOMATERIALS

ISSN
1687-4110
DOI
10.1155/2013/246328
URI
http://hdl.handle.net/10203/192583
Appears in Collection
ME-Journal Papers(저널논문)
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