Unraveling the origin of near-infrared emission in carbon dots by ultrafast spectroscopy
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Park, Yoonsang | - |
dc.contributor.author | Tran, Minh Dao | - |
dc.contributor.author | Kim, Yujin | - |
dc.contributor.author | Won, Sungyeon | - |
dc.contributor.author | Kim, Young-Hoon | - |
dc.contributor.author | Lee, Tae-Woo | - |
dc.contributor.author | Gregorkiewicz, Tom | - |
dc.contributor.author | Lee, Young Hee | - |
dc.contributor.author | Kim, Ji-Hee | - |
dc.contributor.author | Kwon, Woosung | - |
dc.date.accessioned | 2022-04-19T08:42:11Z | - |
dc.date.available | 2022-04-19T08:42:11Z | - |
dc.date.issued | 2022-03 | - |
dc.identifier.issn | 0008-6223 | - |
dc.identifier.issn | 1873-3891 | - |
dc.identifier.uri | https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/145867 | - |
dc.description.abstract | Carbon dots (CDs) are unique light-emissive nanoparticles that are valuable for various applications. However, their complex chemical structures and the limited research interest in their visible-light emission hinder the understanding of their emission structures. Herein, we report the existence of near-infrared (NIR) emissive states originating from the graphitic cores in CDs, which exhibit a completely different behavior from their well-known visible emissive states. Using ultrafast spectroscopy and density functional theory (DFT) calculations, we elucidate the emission mechanism and suggest that small (1-2 nm) graphitic subregions in CDs produce the NIR emissive states, which are rarely affected by surface chemistry changes. Our proposed mechanism and its universality are investigated comprehensively by a comparative analysis with graphene oxide and other types of CDs obtained by different synthetic methods. Finally, we propose a comprehensive emission structure of CDs and redefine the role of structural components in visible-to-NIR emission. | - |
dc.format.extent | 9 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.title | Unraveling the origin of near-infrared emission in carbon dots by ultrafast spectroscopy | - |
dc.type | Article | - |
dc.publisher.location | 영국 | - |
dc.identifier.doi | 10.1016/j.carbon.2021.11.063 | - |
dc.identifier.scopusid | 2-s2.0-85120627125 | - |
dc.identifier.wosid | 000730873700001 | - |
dc.identifier.bibliographicCitation | CARBON, v.188, pp 229 - 237 | - |
dc.citation.title | CARBON | - |
dc.citation.volume | 188 | - |
dc.citation.startPage | 229 | - |
dc.citation.endPage | 237 | - |
dc.type.docType | Article | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.subject.keywordPlus | GRAPHENE QUANTUM DOTS | - |
dc.subject.keywordPlus | CHEMICAL-STRUCTURE | - |
dc.subject.keywordPlus | DEEP-ULTRAVIOLET | - |
dc.subject.keywordPlus | NANODOTS | - |
dc.subject.keywordPlus | OXIDE | - |
dc.subject.keywordPlus | PHOTOLUMINESCENCE | - |
dc.subject.keywordPlus | FLUORESCENCE | - |
dc.subject.keywordPlus | DYNAMICS | - |
dc.subject.keywordPlus | STATES | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
dc.subject.keywordAuthor | Carbon dot | - |
dc.subject.keywordAuthor | Near-infrared | - |
dc.subject.keywordAuthor | Photoluminescence mechanism | - |
dc.subject.keywordAuthor | Energy structure | - |
dc.subject.keywordAuthor | Ultrafast spectroscopy | - |
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