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정영모 ( Young Mo Jung ),김영준 ( Young Jun Kim ),문희규 ( Hi Gue Moon ),김수민 ( Soo Min Kim ),신범주 ( Beom Ju Shin ),이주송 ( Joo Song Lee ),서민아 ( Min Ah Seo ),이택진 ( Taik Jin Lee ),김재헌 ( Jae Hun Kim ),전성찬 ( Seong Ch 한국센서학회 2014 센서학회지 Vol.23 No.5
We report a way to improve the ability of graphene to operate as a gas sensor by applying single stranded deoxyribonucleic acid (DNA). The sensitivity and recovery of the DNA-graphene sensor depending on the different DNA sequences are analyzed. The different sensor responses to reactive chemical vapors are demonstrated in the time domain. Because of the chemical gating effect of the deposited DNA, the resulting devices show complete and rapid recovery to baseline unlike the bare graphene at room temperature. The application of the pattern recognition technique can increase the potential of DNA-graphene sensors as a chemical vapor classifier.