Graphene-based flexible NO2 chemical sensors

Chongmin Lee; Jaehui Ahn; Ki Bong Lee; Donghwan Kim; Jihyun Kim

doi:10.1016/j.tsf.2012.03.095

Graphene-based flexible NO₂ chemical sensors

Chongmin Lee, Jaehui Ahn, Ki Bong Lee, Donghwan Kim, Jihyun Kim

Research output: Contribution to journal › Article

47 Citations (Scopus)

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 NO ₂ 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.

Original language	English
Pages (from-to)	5459-5462
Number of pages	4
Journal	Thin Solid Films
Volume	520
Issue number	16
DOIs	https://doi.org/10.1016/j.tsf.2012.03.095
Publication status	Published - 2012 Jun 1

Keywords

Flexible substrate
Gas sensor
Graphene

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Surfaces and Interfaces
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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Lee, C., Ahn, J., Lee, K. B., Kim, D., & Kim, J. (2012). Graphene-based flexible NO₂ chemical sensors. Thin Solid Films, 520(16), 5459-5462. https://doi.org/10.1016/j.tsf.2012.03.095

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