Facile Synthesis of 2D-HfS2 Flakes for \mu -IDE-Based Methanol Sensor: Fast Detection at Room Temperature

A new and astonishing resistive gas sensor based on Al _{\mu}-{\text {IDE}} /HfS 2 , synthesized by chemical route, has been developed for precise detection of methanol vapor at room temperature. A high sensitivity of 1.29 has been found at room temperature with the exposure of 500 ppm of methanol v...

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Veröffentlicht in:IEEE sensors journal 2019-10, Vol.19 (20), p.9090-9096
Hauptverfasser: Das, Subhashis, Sharma, Shivani, Sharma, Satinder Kumar
Format: Artikel
Sprache:eng
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Zusammenfassung:A new and astonishing resistive gas sensor based on Al _{\mu}-{\text {IDE}} /HfS 2 , synthesized by chemical route, has been developed for precise detection of methanol vapor at room temperature. A high sensitivity of 1.29 has been found at room temperature with the exposure of 500 ppm of methanol vapor at an operating bias of 1 V. Sensitivity has been obtained from transient response analysis. Most importantly, very fast response/recovery characteristics with good baseline restoration have been witnessed. The response time and recovery time have been recorded in the range of ~12.12 s to ~21.14 s and ~23.72 s to ~39 s. Cross-sensitivity with other interfering species has also been studied. A comprehensive justification, including Langmuir adsorption-desorption isotherm for appreciable sensing response, has also been delineated.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2019.2925027