DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kwon, Bitnuri | - |
dc.contributor.author | Bae, Hyeonhu | - |
dc.contributor.author | Lee, Hoonkyung | - |
dc.contributor.author | Kim, Seunghyun | - |
dc.contributor.author | 황진현 | - |
dc.contributor.author | 임형섭 | - |
dc.contributor.author | Lee, Jung Hun | - |
dc.contributor.author | Cho, Kilwon | - |
dc.contributor.author | Ye, Jongpil | - |
dc.contributor.author | Lee, Seungae | - |
dc.contributor.author | Lee, Wi Hyoung | - |
dc.date.accessioned | 2023-02-28T03:00:27Z | - |
dc.date.available | 2023-02-28T03:00:27Z | - |
dc.date.created | 2023-02-27 | - |
dc.date.issued | 2022-02 | - |
dc.identifier.issn | 1936-0851 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/115924 | - |
dc.description.abstract | Sensitive and selective detection of target gases is the ultimate goal for commercialization of graphene gas sensors. Here, ultrasensitive n-channel graphene gas sensors were developed by using n-doped graphene with ethylene amines The exposure of the n-doped graphene to oxidizing gases such as NO 2 leads to a current decrease that depends strongly on the number of amine functional groups in various types of ethylene amines Graphene doped with diethylenetriamine (DETA) exhibits the highest response, recovery, and long-term sensing stability to NO2, with an average detection limit of 0.83 parts per quadrillion (ppq, 10(-15)), due to the attractive electrostatic interaction between electron-rich graphene and electron-deficient NO2. Our first-principles calculation supported a preferential adsorption of NO2 on n-doped graphene. In addition, gas molecules on the n-channel graphene provide charged impurities, thereby intensifying the current decrease for an excellent response to oxidizing gases such as NO2 or SO2. On the contrary, absence of such a strong interaction between NH3 and DETA-doped graphene and combined effects of current increase by n-doping and mobility decrease by charged impurities result in a completely no response to NH3. Because the n-channel is easily induced by a top-molecular dopant, a flexible graphene sensor with outstanding NO2 detection capability was successfully fabricated on plastic without vertical stacks of gate-electrode and gate-dielectric. Our gate-free graphene gas sensors enabled by nondestructive molecular ndoping could be used for the selective detection of subppq-level NO2 in a gas mixture with reducing gases. | - |
dc.language | English | - |
dc.publisher | American Chemical Society | - |
dc.relation.isPartOf | ACS Nano | - |
dc.title | Ultrasensitive N-Channel Graphene Gas Sensors by Nondestructive Molecular Doping | - |
dc.type | Article | - |
dc.identifier.doi | 10.1021/acsnano.1c08186 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | ACS Nano, v.16, no.2, pp.2176 - 2187 | - |
dc.identifier.wosid | 000776691400041 | - |
dc.citation.endPage | 2187 | - |
dc.citation.number | 2 | - |
dc.citation.startPage | 2176 | - |
dc.citation.title | ACS Nano | - |
dc.citation.volume | 16 | - |
dc.contributor.affiliatedAuthor | 황진현 | - |
dc.contributor.affiliatedAuthor | 임형섭 | - |
dc.contributor.affiliatedAuthor | Cho, Kilwon | - |
dc.identifier.scopusid | 2-s2.0-85124280464 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | SELF-ASSEMBLED MONOLAYERS | - |
dc.subject.keywordPlus | LAYER GRAPHENE | - |
dc.subject.keywordPlus | TRANSISTOR | - |
dc.subject.keywordPlus | CARBON | - |
dc.subject.keywordPlus | FILMS | - |
dc.subject.keywordAuthor | graphene | - |
dc.subject.keywordAuthor | gas sensor | - |
dc.subject.keywordAuthor | n-channel | - |
dc.subject.keywordAuthor | gate-free | - |
dc.subject.keywordAuthor | molecular doping | - |
dc.subject.keywordAuthor | sensitivity | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
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