A chemiresistive sensor array from conductive polymer nanowires fabricated by nanoscale soft lithography

One-dimensional organic nanostructures are essential building blocks for high performance gas sensors. Constructing an e-nose type sensor array is the current golden standard in developing portable systems for the detection of gas mixtures. However, facile fabrication of nanoscale sensor arrays is s...

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Bibliographic Details
Published in:Nanoscale 2018-11, Vol.1 (44), p.2578-2586
Main Authors: Jiang, Yang, Tang, Ning, Zhou, Cheng, Han, Ziyu, Qu, Hemi, Duan, Xuexin
Format: Article
Language:English
Subjects:
Alcohols
Alkanes
Amines
Conducting polymers
Construction standards
Electronic noses
Functional groups
Gas mixtures
Gas sensors
Ketones
Lithography
Nanofabrication
Nanotechnology devices
Nanowires
Organic chemistry
Pattern recognition
Polystyrene resins
Self-assembled monolayers
Self-assembly
Sensitivity analysis
Sensor arrays
Sensors
VOCs
Volatile organic compounds
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Summary:One-dimensional organic nanostructures are essential building blocks for high performance gas sensors. Constructing an e-nose type sensor array is the current golden standard in developing portable systems for the detection of gas mixtures. However, facile fabrication of nanoscale sensor arrays is still challenging due to the high cost of the conventional nanofabrication techniques. In this work, we fabricate a chemiresistive gas sensor array composed of well-ordered sub-100 nm wide conducting polymer nanowires using cost-effective nanoscale soft lithography. Poly(3,4-ethylene-dioxythiophene)-poly(styrene sulfonate) (PEDOT:PSS) nanowires functionalized with different self-assembled monolayers (SAMs) are capable of identifying volatile organic compounds (VOCs) at a low concentration range. The side chains and functional groups of the SAMs introduce different sensitivities and selectivities to the targeted analytes. The distinct response pattern of each chemical is subjected to pattern recognition protocols, which leads to a clear separation towards ten VOCs, including ketones, alcohols, alkanes, aromatics and amines. These results of the chemiresistive gas sensor array demonstrate that nanoscale soft lithography is a reliable approach for fabricating nanoscale devices and has the potential of mass producibility. A chemiresistive gas sensor array composed of well-ordered sub-100 nm wide conducting polymer nanowires was fabricated by using cost-effective nanoscale soft lithography.
ISSN:2040-3364
2040-3372
DOI:10.1039/c8nr04198a