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

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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).

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
ISBN (Print)9781628418651
Publication statusPublished - 2015
Externally publishedYes
Event5th Asia-Pacific Optical Sensors Conference, APOS 2015 - Jeju, Korea, Republic of
Duration: 2015 May 202015 May 22


Other5th Asia-Pacific Optical Sensors Conference, APOS 2015
CountryKorea, Republic of


  • Graphene
  • Principle Component Analysis
  • Sensor Array
  • Single-Stranded DNA

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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