The Effect of Monolayer Graphene on the UV Assisted NO2 Sensing and Recovery at Room Temperature

Tsung-Cheng Chen; Yu-Cheng Yang; Hui-Ling Liu; Chia-Ming Yang; M. Meyyappan; Chao-Sung Lai

doi:10.3390/proceedings1040461

Proceedings (Aug 2017)

The Effect of Monolayer Graphene on the UV Assisted NO2 Sensing and Recovery at Room Temperature

Tsung-Cheng Chen,
Yu-Cheng Yang,
Hui-Ling Liu,
Chia-Ming Yang,
M. Meyyappan,
Chao-Sung Lai

Affiliations

Tsung-Cheng Chen: Department of Electronic Engineering, Chang Gung University, Taoyuan, Taiwan
Yu-Cheng Yang: Graduate Institute of Electro-Optical Engineering, Chang Gung University, Taoyuan, Taiwan
Hui-Ling Liu: Graduate Institute of Electro-Optical Engineering, Chang Gung University, Taoyuan, Taiwan
Chia-Ming Yang: Graduate Institute of Electro-Optical Engineering, Chang Gung University, Taoyuan, Taiwan
M. Meyyappan: Center for Nanotechnology, NASA Ames Research Center, Moffett Field, CA 94035, USA
Chao-Sung Lai: Department of Electronic Engineering, Chang Gung University, Taoyuan, Taiwan

DOI: https://doi.org/10.3390/proceedings1040461
Journal volume & issue: Vol. 1, no. 4
p. 461

Abstract

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In the present study, UV light induced desorption of nitrogen dioxide (NO2) on pristine graphene based gas sensor is used to improve the sensing performance. Compared to the sample without UV light exposure, the response is 12%, 18% and 21% for NO2 concentrations of 1, 3 and 5 ppm. In addition, the recovery could be speeded up by UV irradiation. The sensor shows good behavior of repeatability when tested for 1 ppm of NO2 in 3 cycles. The graphene sensor with UV irradiation has a higher sensitivity to NO2 than to other gases under higher concentrations.

Published in Proceedings

ISSN: 2504-3900 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: General Works
Website: http://www.mdpi.com/journal/proceedings

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