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Proceedings Paper

Strong room-temperature chemiresistive effect of TiO2 nanowires to nitro-aromatic compounds
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Paper Abstract

Nanostructured TiO2 thin films are found to be highly responsive to trace vapors of common nitro-explosives at room temperature. Thin films of TiO2 nanowires, made with high yield hydrothermal synthesis, present very reliable sensing characteristics to nitro-aromatic molecules with high sensitivity and fast response at ambient condition. The detection limit of 2, 4-dinitrotoluene (DNT) vapor at room temperature could reach up to 3ppb. The experimental results indicate titania nanowires as a novel chemical sensor to explosive gas have a great commercial potential due to its unique advantages: high sensitivity, rapid response and recovery, small size suitable for intergration with microelectronics and low fabrication cost. Experimental results and a theoretical model are presented.

Paper Details

Date Published: 26 May 2011
PDF: 7 pages
Proc. SPIE 8024, Advanced Environmental, Chemical, and Biological Sensing Technologies VIII, 80240W (26 May 2011); doi: 10.1117/12.885065
Show Author Affiliations
Danling Wang, Univ. of Washington (United States)
Antao Chen, Univ. of Washington (United States)
Qifeng Zhang, Univ. of Washington (United States)
Guozhong Cao, Univ. of Washington (United States)


Published in SPIE Proceedings Vol. 8024:
Advanced Environmental, Chemical, and Biological Sensing Technologies VIII
Tuan Vo-Dinh; Robert A. Lieberman; Günter Gauglitz, Editor(s)

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