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1 July 2015 Selective vapor detection of an integrated chemical sensor array
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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Proceedings Volume 9655, Fifth Asia-Pacific Optical Sensors Conference; 96551A (2015) https://doi.org/10.1117/12.2185259
Event: Fifth Asia Pacific Optical Sensors Conference, 2015, Jeju, Korea, Republic of
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).
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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, and Chulki Kim "Selective vapor detection of an integrated chemical sensor array", Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 96551A (1 July 2015); https://doi.org/10.1117/12.2185259
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KEYWORDS
Graphene
Sensors
Principal component analysis
Humidity
Carbon monoxide
NOx
Molecules
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