Browsing by Author "Chang, Yu-Cheng"

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    High response CO sensor based on a polyaniline/SnO2 nanocomposite
    (MDPI AG, 2019-01-21) Jian, Kai-Syuan; Chang, Chi-Jung; Chang, Yu-Cheng; Tsay, Chien-Yie; Chen, Jing-Heng; Horng, Tzyy-Leng; Lee, Gang-Juan; Karuppasamy, Lakshmanan; Anandan, Sambandam; Chen, Chin-Yi
    A polyaniline (PANI)/tin oxide (SnO2) composite for a CO sensor was fabricated using a composite film composed of SnO2 nanoparticles and PANI deposition in the present study. Tin oxide nanoparticles were synthesized by the sol-gel method. The SnO2 nanoparticles provided a high surface area to significantly enhance the response to the change in CO concentration at low operating temperature (< 75 °C). The excellent sensor response was mainly attributed to the relatively good properties of PANI in the redox reaction during sensing, which produced a great resistance difference between the air and CO gas at low operating temperature. Therefore, the combination of n-type SnO2 nanoparticles with a high surface area and a thick film of conductive PANI is an effective strategy to design a high-performance CO gas sensor. © 2018 by the authors.