Conducting polymer nanowires volatile organic compounds sensor array fabricated by soft lithography

Abstract

This paper reported a high-performance e-nose type gas sensor array based on conducting polymer nanowires in which each sensor is functionalized individually by different self-assembled monolayers (SAMs). The nanowire sensor response can be tuned by the introduced groups. The different response values of the nanowires to volatile organic compounds (VOCs) are utilized to constitute unique identification code for ethanol, hexane, pentanone and p-xylene detections, and successfully realizing discrimination of different VOCs. Besides, the limit of detection of ethanol is as low as 100 ppb measured by the SAM modified nanowires.