Jung, Youngmo Kim, Young Jun Choi, Jaebin Lim, Chaehyun Shin, Beom Ju Moon, Hi Gyu Kim, Chulki Kim, Jae Hun Seo, Minah Kang, Chong Yun Jun, Seong Chan Lee, Seok Lee, Taikjin 2024-01-19T11:39:36Z 2024-01-19T11:39:36Z 2022-03-01 2015-05 0277-786X https://pubs.kist.re.kr/handle/201004/115040 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). English SPIE-INT SOC OPTICAL ENGINEERING Selective vapor detection of an integrated chemical sensor array Conference 10.1117/12.2185259 1 5th Asia-Pacific Optical Sensors Conference (APOS) 5th Asia-Pacific Optical Sensors Conference (APOS) US Jeju, SOUTH KOREA 2015-05-20 FIFTH ASIA-PACIFIC OPTICAL SENSORS CONFERENCE 000358602400045 2-s2.0-84939192174