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- W884608086 abstract "Nanocrystalline SnO2-Polyaniline (SnO2–PANI) heterostructure sensors have been developed for sensing trace amounts of toxic gases (2 ppm SO2 and 50 ppb NO2) at room temperature with high specificity. SnO2–PANI heterostructure has been prepared and the heterostructures have been optimized by electrochemical deposition of PANI of various thicknesses on nanocrystalline SnO2 (size ∼ 15 nm) prepared by Langmuir–Blodgett technique. Two types of sensors: sensor #1 with in-plane gold contacts one each from SnO2 and PANI and sensor #2 with in-plane gold contacts from PANI film were prepared. Sensor #1 showed high specificity towards NO2 (50 ppb) gas with response and subsequent recovery at room temperature without any carrier gas flow or UV irradiation while sensor #2 showed high response and recovery towards SO2 (2 ppm). Furthermore, the sensor #1 showed a response time of about 5 min towards NO2 gas and recovery time of about 15 min at 25 °C. Space charge modulation occurring at various interfaces such as SnO2–PANI interface and boundaries between the SnO2 nanograins explains the high toxic gas sensitivity observed for the SnO2–PANI heterostructured thin film sensor." @default.
- W884608086 created "2016-06-24" @default.
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- W884608086 date "2015-12-01" @default.
- W884608086 modified "2023-10-04" @default.
- W884608086 title "Tin oxide–polyaniline heterostructure sensors for highly sensitive and selective detection of toxic gases at room temperature" @default.
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- W884608086 doi "https://doi.org/10.1016/j.snb.2015.05.074" @default.
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