Journal
NANOTECHNOLOGY
Volume 28, Issue 48, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aa905b
Keywords
conducting polymer; PEDOT:PSS; nanowire; chemiresistor; gas sensor
Funding
- Natural Science Foundation of China (NSFC) [61674114]
- Tianjin Applied Basic Research and Advanced Technology [14JCYBJC41500]
- 111 Project [B07014]
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Resistive devices composed of one-dimensional nanostructures are promising candidates for the next generation of gas sensors. However, the large-scale fabrication of nanowires is still challenging, which restricts the commercialization of such devices. Here, we report a highly efficient and facile approach to fabricating poly(3,4-ethylenedioxythiophene)-poly (styrenesulfonate) (PEDOT:PSS) nanowire chemiresistive gas sensors by nanoscale soft lithography. Well-defined sub-100 nm nanowires are fabricated on silicon substrate, which facilitates device integration. The nanowire chemiresistive gas sensor is demonstrated for NH3 and NO2 detection at room temperature and shows a limit of detection at ppb level, which is compatible with nanoscale PEDOT:PSS gas sensors fabricated with the conventional lithography technique. In comparison with PEDOT:PSS thin-film gas sensors, the nanowire gas sensor exhibits higher sensitivity and a much faster response to gas molecules.
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