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Proceedings Paper

Pushing the limit of metal-oxide nanowire chemical sensing: selective detection of NO2 down to ppb levels
Author(s): Daihua Zhang; Chao Li; Zuqin Liu; Tao Tang; Bo Lei; Chongwu Zhou
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Paper Abstract

We demonstrate detection of NO2 down to ppb levels using transistors based on both single and multiple In2O3 nanowires operating at room temperature. This represents orders-of-magnitude improvement over previously reported metal oxide film or nanowire/nanobelt sensors. A comparison between the single and multiple nanowire sensors reveals that the latter have numerous advantages in terms of great reliability, high sensitivity and simplicity in fabrication. Furthermore, selective detection of NO2 can be readily achieved with multiple-nanowire sensors even with other common chemicals such as NH3, O2, CO and H2 around.

Paper Details

Date Published: 29 December 2004
PDF: 8 pages
Proc. SPIE 5593, Nanosensing: Materials and Devices, (29 December 2004); doi: 10.1117/12.571592
Show Author Affiliations
Daihua Zhang, Univ. of Southern California (United States)
Chao Li, Univ. of Southern California (United States)
Zuqin Liu, Univ. of Southern California (United States)
Tao Tang, Univ. of Southern California (United States)
Bo Lei, Univ. of Southern California (United States)
Chongwu Zhou, Univ. of Southern California (United States)


Published in SPIE Proceedings Vol. 5593:
Nanosensing: Materials and Devices
M. Saif Islam; Achyut K. Dutta, Editor(s)

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