19 April 2013 Femtosecond laser irradiation enhanced room temperature tin oxide nanostructure gas sensor
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Abstract
Tin oxide (SnO2) thin film gas sensors that function at room temperature have been fabricated on nanostructured substrates. After femtosecond laser irradiation of the surface of the SnO2, the sensitivity to gases, for example, carbon monoxide, increased noticeably. The dependence of the sensitivity on the number of laser pulses has been investigated. It is believed that the femtosecond laser pulses generate defects in a thin layer on the SnO2 sensor surface. These defects may result in a potential energy well creating surface bound states for electrons to move on the surface, which increases the sensitivity to gases.
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Haizhou Ren, Haizhou Ren, Haibin Huo, Haibin Huo, Mengyan Shen, Mengyan Shen, Marina Ruths, Marina Ruths, Hongwei Sun, Hongwei Sun, } "Femtosecond laser irradiation enhanced room temperature tin oxide nanostructure gas sensor", Proc. SPIE 8692, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013, 86923S (19 April 2013); doi: 10.1117/12.2011952; https://doi.org/10.1117/12.2011952
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