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Graphene-based flexible NO2 chemical sensors

Authors
Lee, ChongminAhn, JaehuiLee, Ki BongKim, DonghwanKim, Jihyun
Issue Date
1-6월-2012
Publisher
ELSEVIER SCIENCE SA
Keywords
Graphene; Gas sensor; Flexible substrate
Citation
THIN SOLID FILMS, v.520, no.16, pp.5459 - 5462
Indexed
SCIE
SCOPUS
Journal Title
THIN SOLID FILMS
Volume
520
Number
16
Start Page
5459
End Page
5462
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/108178
DOI
10.1016/j.tsf.2012.03.095
ISSN
0040-6090
Abstract
We demonstrated graphene-based flexible NO2 chemical sensors on polyethylene terephthalate substrate where graphene was grown on Cu-foil by chemical vapor deposition technique. Introduction of NO2 molecules to graphene caused a rapid increase in the currents due to the charge transfer between NO2 molecules and graphene under both relaxed and strained conditions. However, the recovery was delayed due to slow desorption of NO2 molecules from defective sites in graphene. Also, strain in graphene increased the resistance of graphene layer where the change in conductance was reversible. Our graphene-based NO2 chemical sensors showed a great sensitivity and reproducibility under both strained and relaxed conditions. (C) 2012 Elsevier B.V. All rights reserved.
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