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Intrinsic response of graphene vapor sensors
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Dan, Yaping, Lu, Ye, Kybert, Nicholas J., Luo, Zhengtang and Johnson, A. T. Charlie (2009) Intrinsic response of graphene vapor sensors. Nano Letters, Vol.9 (No.4). pp. 1472-1475. doi:10.1021/nl8033637 ISSN 1530-6984.
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Official URL: http://dx.doi.org/10.1021/nl8033637
Abstract
Graphene is a two-dimensional material with extremely favorable chemical sensor properties. Conventional nanolithography typically leaves a resist residue on the graphene surface, whose impact on the sensor characteristics has not yet been determined. Here we show that the contamination layer chemically dopes the graphene, enhances carrier scattering, and acts as an absorbent layer that concentrates analyte molecules at the graphene surface, thereby enhancing the sensor response. We demonstrate a cleaning process that veriliably removes the contamination on the device structure and allows the intrinsic chemical responses of the graphene monolayer to be measured. These intrinsic responses are surprisingly small, even upon exposure to strong analytes such as ammonia vapor.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry T Technology T Technology > TA Engineering (General). Civil engineering (General) |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Nano Letters | ||||
Publisher: | American Chemical Society | ||||
ISSN: | 1530-6984 | ||||
Official Date: | April 2009 | ||||
Dates: |
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Volume: | Vol.9 | ||||
Number: | No.4 | ||||
Number of Pages: | 4 | ||||
Page Range: | pp. 1472-1475 | ||||
DOI: | 10.1021/nl8033637 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Funder: | JSTO DTRA, Army Research Office, NSF MRSEC | ||||
Grant number: | W911NF-061-0462, DMR05-20020 |
Data sourced from Thomson Reuters' Web of Knowledge
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