Abstract
This paper reported a high-performance e-nose type chemiresistive gas sensor composed of graphene oxide-doped poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) nanowires. Large scale and well-defined sub-100-nm nanowires were prepared using nanoscale soft lithography in a highly efficient and facile way, facilitating subsequent device integration. The responses of the nanowire sensors to volatile organic compounds (VOCs) can be tuned by different polymer components, which are utilized to constitute unique identification codes for ethanol, n-hexane, acetone, and p-xylene and realize the discrimination of different VOCs. Besides, the score plot and classification matrix obtained, respectively, from the principal component analysis and linear discriminant analysis provide sufficient information to differentiate different VOCs.
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