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Anomalous Behaviors of Visible Luminescence from Graphene Quantum Dots: Interplay between Size and Shape

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dc.contributor.authorKim, Sung-
dc.contributor.authorHwang, Sung Won-
dc.contributor.authorKim, Min-Kook-
dc.contributor.authorShin, Dong Yeol-
dc.contributor.authorShin, Dong Hee-
dc.contributor.authorKim, Chang Oh-
dc.contributor.authorYang, Seung Bum-
dc.contributor.authorPark, Jae Hee-
dc.contributor.authorHwang, Euyheon-
dc.contributor.authorChoi, Suk-Ho-
dc.contributor.authorKo, Geunwoo-
dc.contributor.authorSim, Sunghyun-
dc.contributor.authorSone, Cheolsoo-
dc.contributor.authorChoi, Hyoung Joon-
dc.contributor.authorBae, Sukang-
dc.contributor.authorHong, Byung Hee-
dc.date.accessioned2021-01-31T08:27:05Z-
dc.date.available2021-01-31T08:27:05Z-
dc.date.created2020-12-11-
dc.date.issued2012-09-
dc.identifier.citationACS Nano, Vol.6 No.9, pp.8203-8208-
dc.identifier.issn1936-0851-
dc.identifier.other118993-
dc.identifier.urihttps://hdl.handle.net/10371/172127-
dc.description.abstractFor the application of graphene quantum dots (GQDs) to optoelectronic nanodevices, it is of critical importance to understand the mechanisms which result in novel phenomena of their light absorption/emission. Here, we present size-dependent shape/edge-state variations of GQDs and visible photoluminescence (PL) showing anomalous size dependences. With varying the average size (d(a)) of GQDs from 5 to 35 nm, the peak energy of the absorption spectra monotonically decreases, while that of the visible PL spectra unusually shows nonmonotonic behaviors having a minimum at d(a) = similar to 17 nm. The PL behaviors can be attributed to the novel feature of GQDs, that is, the circular-to-polygonal-shape and corresponding edge-state variations of GQDs at d(a) = similar to 17 nm as the GQD size increases, as demonstrated by high-resolution transmission electron microscopy.-
dc.language영어-
dc.publisherAmerican Chemical Society-
dc.titleAnomalous Behaviors of Visible Luminescence from Graphene Quantum Dots: Interplay between Size and Shape-
dc.typeArticle-
dc.contributor.AlternativeAuthor홍병희-
dc.identifier.doi10.1021/nn302878r-
dc.citation.journaltitleACS Nano-
dc.identifier.wosid000309040600073-
dc.identifier.scopusid2-s2.0-84866693492-
dc.citation.endpage8208-
dc.citation.number9-
dc.citation.startpage8203-
dc.citation.volume6-
dc.identifier.sci000309040600073-
dc.description.isOpenAccessN-
dc.contributor.affiliatedAuthorHong, Byung Hee-
dc.type.docTypeArticle-
dc.description.journalClass1-
dc.subject.keywordPlusRELAXATION-
dc.subject.keywordAuthorgraphene-
dc.subject.keywordAuthorquantum dot-
dc.subject.keywordAuthorsize-
dc.subject.keywordAuthorshape-
dc.subject.keywordAuthoredge-
dc.subject.keywordAuthorphotoluminescence-
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