A poly (3, 3"'-dialkylquaterthiophene) (PQT-12) based flexible metal-semiconductor-metal nitrogen dioxide (NO2) gas sensor fabricated on a flexible polyamide substrate has been reported in this article for the first time. The thin PQT-12 film deposited on the polyamide substrate is investigated by X-ray diffraction, atomic force microscopy, and scanning electron microscopy. The sensor shows a gas response of ~24% with a response time of ~41 s at a very low concentration of 100-ppb NO2gas under ambient air atmosphere. The gas response of -48% is measured at higher concentration of 500-ppb NO2gas. The NO2gas detection has been illustrated using a prototype circuit for the proposed sensor.
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Kumar et al. (2018) studied this question.
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