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Proceedings Paper

Selective vapor detection of an integrated chemical sensor array
Author(s): Youngmo Jung; Young Jun Kim; Jaebin Choi; Chaehyun Lim; Beom Ju Shin; Hi Gyu Moon; Taikjin Lee; Jae Hun Kim; Minah Seo; Chong Yun Kang; Seong Chan Jun; Seok Lee; Chulki Kim
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Paper Abstract

Graphene is a promising material for vapor sensor applications because of its potential to be functionalized for specific chemical gases. In this work, we present a graphene gas sensor that uses single-stranded DNA (ssDNA) molecules as its sensing agent. We investigate the characteristics of graphene field effect transistors (FETs) coated with different ssDNAs. The sensitivity and recovery rate for a specific gas are modified according to the differences in the DNA molecules’ Guanine (G) and Cytosine (C) content. ssDNA-functionalized devices show a higher recovery rate compared to bare graphene devices. Pattern analysis of a 2-by-2 sensor array composed of graphene devices functionalized with different-sequence ssDNA enables identification of NH3, NO2, CO, SO2 using Principle Component Analysis (PCA).

Paper Details

Date Published: 1 July 2015
PDF: 4 pages
Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 96551A (1 July 2015); doi: 10.1117/12.2185259
Show Author Affiliations
Youngmo Jung, Korea Institute of Science and Technology (Korea, Republic of)
Yonsei Univ. (Korea, Republic of)
Young Jun Kim, Korea Institute of Science and Technology (Korea, Republic of)
Jaebin Choi, Korea Institute of Science and Technology (Korea, Republic of)
Chaehyun Lim, Korea Institute of Science and Technology (Korea, Republic of)
Beom Ju Shin, Korea Institute of Science and Technology (Korea, Republic of)
Hi Gyu Moon, Korea Institute of Science and Technology (Korea, Republic of)
Taikjin Lee, Korea Institute of Science and Technology (Korea, Republic of)
Jae Hun Kim, Korea Institute of Science and Technology (Korea, Republic of)
Minah Seo, Korea Institute of Science and Technology (Korea, Republic of)
Chong Yun Kang, Korea Institute of Science and Technology (Korea, Republic of)
Seong Chan Jun, Yonsei Univ. (Korea, Republic of)
Seok Lee, Korea Institute of Science and Technology (Korea, Republic of)
Chulki Kim, Korea Institute of Science and Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 9655:
Fifth Asia-Pacific Optical Sensors Conference
Byoungho Lee; Sang-Bae Lee; Yunjiang Rao, Editor(s)

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