Intrinsic Response of Graphene Vapor Sensors

dc.contributor.authorDan, Yaping
dc.contributor.authorLu, Ye
dc.contributor.authorLuo, Zhengtang
dc.contributor.authorJohnson, A.T. Charlie
dc.contributor.authorKybert, Nicholas J
dc.date2023-05-17T03:18:48.000
dc.date.accessioned2023-05-22T19:09:34Z
dc.date.available2023-05-22T19:09:34Z
dc.date.issued2009-03-06
dc.date.submitted2009-11-03T07:34:33-08:00
dc.description.abstractGraphene 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 verifiably 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.
dc.description.commentsIntrinsic Response of Graphene Vapor Sensors. Yaping Dan, Ye Lu, Nicholas J. Kybert, Zhengtang Luo, A. T. Charlie Johnson. Nano Letters 2009 9 (4), 1472-1475 http://dx.doi.org/10.1021/nl8033637
dc.identifier.urihttps://repository.upenn.edu/handle/20.500.14332/33734
dc.legacy.articleid1560
dc.legacy.fieldstrue
dc.relation.urlhttp://dx.doi.org/10.1021/nl8033637
dc.source.issue519
dc.source.journalDepartmental Papers (ESE)
dc.source.peerreviewedtrue
dc.source.statuspublished
dc.subject.otherEngineering
dc.subject.otherNanoscience and Nanotechnology
dc.titleIntrinsic Response of Graphene Vapor Sensors
dc.typeArticle
digcom.contributor.authorisAuthorOfPublication|email:yapingd@seas.upenn.edu|institution:University of Pennsylvania|Dan, Yaping
digcom.contributor.authorisAuthorOfPublication|email:luye@sas.upenn.edu|institution:University of Pennsylvania|Lu, Ye
digcom.contributor.authorKybert, Nicholas J
digcom.contributor.authorisAuthorOfPublication|email:zhl@sas.upenn.edu|institution:University of Pennsylvania|Luo, Zhengtang
digcom.contributor.authorisAuthorOfPublication|email:cjohnson@physics.upenn.edu|institution:University of Pennsylvania|Johnson, A.T. Charlie
digcom.identifierese_papers/519
digcom.identifier.contextkey1053857
digcom.identifier.submissionpathese_papers/519
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upenn.schoolDepartmentCenterDepartmental Papers (ESE)
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