Graphene-based flexible NO 2 chemical sensors

Chongmin Lee, Jaehui Ahn, Ki Bong Lee, Donghwan Kim, Ji Hyun Kim

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

We demonstrated graphene-based flexible NO 2 chemical sensors on polyethylene terephthalate substrate where graphene was grown on Cu-foil by chemical vapor deposition technique. Introduction of NO 2 molecules to graphene caused a rapid increase in the currents due to the charge transfer between NO 2 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 NO 2 chemical sensors showed a great sensitivity and reproducibility under both strained and relaxed conditions.

Original languageEnglish
Pages (from-to)5459-5462
Number of pages4
JournalThin Solid Films
Volume520
Issue number16
DOIs
Publication statusPublished - 2012 Jun 1

Fingerprint

Graphite
Chemical sensors
Graphene
graphene
sensors
Molecules
molecules
Polyethylene Terephthalates
polyethylene terephthalate
Polyethylene terephthalates
Metal foil
Charge transfer
Chemical vapor deposition
foils
Desorption
desorption
recovery
charge transfer
vapor deposition
Recovery

Keywords

  • Flexible substrate
  • Gas sensor
  • Graphene

ASJC Scopus subject areas

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

Cite this

Graphene-based flexible NO 2 chemical sensors. / Lee, Chongmin; Ahn, Jaehui; Lee, Ki Bong; Kim, Donghwan; Kim, Ji Hyun.

In: Thin Solid Films, Vol. 520, No. 16, 01.06.2012, p. 5459-5462.

Research output: Contribution to journalArticle

Lee, Chongmin ; Ahn, Jaehui ; Lee, Ki Bong ; Kim, Donghwan ; Kim, Ji Hyun. / Graphene-based flexible NO 2 chemical sensors. In: Thin Solid Films. 2012 ; Vol. 520, No. 16. pp. 5459-5462.
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