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 › peer-review

54 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

Access to Document

10.1016/j.tsf.2012.03.095

Cite this

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title = "Graphene-based flexible NO2 chemical sensors",

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.",

keywords = "Flexible substrate, Gas sensor, Graphene",

author = "Chongmin Lee and Jaehui Ahn and Lee, {Ki Bong} and Donghwan Kim and Jihyun Kim",

note = "Funding Information: The research at Korea University was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2011-0004270 ) and by a Human Resources Development grant from the Korea Institute of Energy Technology Evaluation and Planning (KETEP) funded by the Ministry of Knowledge Economy (no. 20114010203050 ),",

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AU - Lee, Chongmin

AU - Ahn, Jaehui

AU - Lee, Ki Bong

AU - Kim, Donghwan

AU - Kim, Jihyun

N1 - Funding Information: The research at Korea University was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2011-0004270 ) and by a Human Resources Development grant from the Korea Institute of Energy Technology Evaluation and Planning (KETEP) funded by the Ministry of Knowledge Economy (no. 20114010203050 ),

PY - 2012/6/1

Y1 - 2012/6/1

N2 - 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.

AB - 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.

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KW - Gas sensor

KW - Graphene

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