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

    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).

    Original languageEnglish
    Title of host publicationFifth Asia-Pacific Optical Sensors Conference, APOS 2015
    EditorsByoungho Lee, Yunjiang Rao, Sang Bae Lee
    PublisherSPIE
    ISBN (Electronic)9781628418651
    DOIs
    Publication statusPublished - 2015
    Event5th Asia-Pacific Optical Sensors Conference, APOS 2015 - Jeju, Korea, Republic of
    Duration: 2015 May 202015 May 22

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    Volume9655
    ISSN (Print)0277-786X
    ISSN (Electronic)1996-756X

    Other

    Other5th Asia-Pacific Optical Sensors Conference, APOS 2015
    Country/TerritoryKorea, Republic of
    CityJeju
    Period15/5/2015/5/22

    Bibliographical note

    Publisher Copyright:
    © 2015 Copyright SPIE.

    Keywords

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

    ASJC Scopus subject areas

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

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