26 May 2011 Strong room-temperature chemiresistive effect of TiO2 nanowires to nitro-aromatic compounds
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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.
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Danling Wang, Antao Chen, Qifeng Zhang, Guozhong Cao, "Strong room-temperature chemiresistive effect of TiO2 nanowires to nitro-aromatic compounds", Proc. SPIE 8024, Advanced Environmental, Chemical, and Biological Sensing Technologies VIII, 80240W (26 May 2011); doi: 10.1117/12.885065; https://doi.org/10.1117/12.885065

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