Evidence for Nonradiative Energy Transfer in Graphene-Oxide-Based Hybrid Structures

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buir.contributor.authorDemir, Hilmi Volkan
buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112X
dc.citation.epage25304en_US
dc.citation.issueNumber48en_US
dc.citation.spage25298en_US
dc.citation.volumeNumber117en_US
dc.contributor.authorYeltik, A.en_US
dc.contributor.authorKucukayan-Dogu, G.en_US
dc.contributor.authorGuzelturk, B.en_US
dc.contributor.authorFardindoost, S.en_US
dc.contributor.authorKelestemur, Y.en_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.date.accessioned2015-07-28T12:01:15Z
dc.date.available2015-07-28T12:01:15Z
dc.date.issued2013-11-13en_US
dc.departmentDepartment of Physicsen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractSolution processed graphene variants including graphene oxide (GO) and reduced graphene oxide (RGO) are promising materials for potential optoelectronic applications. To date, efficiency of the excitation energy transfer into GO and RGO thin layers has not been investigated in terms of donor-acceptor separation distance. In the present work, we study nonradiative energy transfer (NRET) from CdSe/CdS quantum dots into single and/or double layer GO or RGO using time-resolved fluorescence spectroscopy. We observe shorter lifetimes as the separation distance between the QDs and GO or RGO decreases. In accordance with these lifetimes, the rates reveal the presence of two different mechanisms dominating the NRET. Here we show that excitonic NRET is predominant at longer intervals while both excitonic and nonexcitonic NRET exist at shorter distances. In addition, we find the NRET rate behavior to be strongly dependent on the reduction degree of the GO-based layers. We obtain high NRET efficiency levels of similar to 97 and similar to 89% for the closest separation of the QD-RGO pair and the QD-GO pair, respectively. These results indicate that strong NRET from QDs into thin layer GO and RGO makes these solution-processable thin films promising candidates for light harvesting and detection systems.en_US
dc.description.provenanceMade available in DSpace on 2015-07-28T12:01:15Z (GMT). No. of bitstreams: 1 10.1021-jp408465a.pdf: 3880986 bytes, checksum: 86daeaf2cb2f6589eaf28c506fa36269 (MD5)en
dc.identifier.doi10.1021/jp408465aen_US
dc.identifier.issn1932-7447
dc.identifier.urihttp://hdl.handle.net/11693/12394
dc.language.isoEnglishen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1021/jp408465aen_US
dc.source.titleJournal of Physical Chemistry Cen_US
dc.subjectGraphite Oxideen_US
dc.subjectRaman-spectroscopyen_US
dc.subjectReductionen_US
dc.subjectTemperatureen_US
dc.subjectMicroscopyen_US
dc.subjectSheetsen_US
dc.subjectFilmsen_US
dc.subjectDotsen_US
dc.titleEvidence for Nonradiative Energy Transfer in Graphene-Oxide-Based Hybrid Structuresen_US
dc.typeArticleen_US

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