A Highly Sensitive and Selective Chemotransistor Using Semiconducting Polymer Gel Films
발표자
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초록
내용
Unlike oxide semiconductors, semiconducting polymer-based chemosensors have a significant attention because of their low operating temperature. However, they suffer from low sensitivity with gas molecules compared to oxide semiconductors. Herein, we describe semiconducting polymer gel showing interpenetrating polymer networks (IPNs). The various functional groups could be introduced by manipulating the silanol groups of IPNs. Therefore, we utilized amine groups (-NH2) (electron donating) as a functional group due to their strong interaction (hydrogen-bonding) with NO2 molecules. The response of amine-functionalized semiconducting polymer gel (NH2-SPG)-based chemotransistor is larger than pristine semiconducting polymer, which is due to enhanced interactions with NO2 (electron withdrawing). Further, the recovery time was significantly improved because penetration of gas into NH2-SPG was restricted by the NH2 groups introduced onto the surface.