Size controlled synthesis of carbon quantum dots using hydride reducing agents

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dc.contributor.authorLinehan, Keith
dc.contributor.authorDoyle, Hugh
dc.contributor.funderHigher Education Authorityen
dc.contributor.funderEuropean Commission
dc.date.accessioned2016-05-06T08:16:00Z
dc.date.available2016-05-06T08:16:00Z
dc.date.issued2014-06-04
dc.date.updated2016-04-10T17:51:52Z
dc.description.abstractHighly luminescent carbon quantum dots (CQDs) are synthesized at room temperature by hydride reduction of carbon tetrachloride (CCl4) within inverse micelles. Regulation of the average diameter of the allylamine terminated CQDs is achieved by varying the strength of the reducing agent used. Transmission electron microscopy shows that the NCs are highly crystalline with well-defined core diameters tuned from 2 to 6 nm, while FTIR and XPS spectroscopy confirm that the CQDs possess similar surface chemistry. UV-Vis and PL spectroscopy show significant quantum confinement effects, with moderate absorption in the UV spectral range, and a strong, narrow luminescence in the visible with a marked dependency on excitation wavelength. Time resolved photoluminescence measurements showed lifetimes for all CQDs in the ns range, while a maximum PL quantum yield of 27% is observed for the CQDs.en
dc.description.sponsorshipEuropean Commission (FP7 Projects: SNAPSUN, grant agreement no. 246310; CommonSense, grant agreement no. 261809); Higher Education Authority (PRTLI program: Cycle 3 “Nanoscience”; Cycle 4 “INSPIRE”)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationLINEHAN, K. & DOYLE, H. 2014. Size controlled synthesis of carbon quantum dots using hydride reducing agents. Journal of Materials Chemistry C, 2, pp. 6025-6031. doi:10.1039/C4TC00826Jen
dc.identifier.doi10.1039/c4tc00826j
dc.identifier.endpage6031en
dc.identifier.issn2050-7526
dc.identifier.journaltitleJournal of Materials Chemistry Cen
dc.identifier.startpage6025en
dc.identifier.urihttps://hdl.handle.net/10468/2510
dc.identifier.volume2en
dc.language.isoenen
dc.publisherThe Royal Society of Chemistry
dc.rights© 2014, the Authors.en
dc.subjectNanocrystalsen
dc.subjectNanodotsen
dc.subjectGraphiteen
dc.subjectYieldsen
dc.titleSize controlled synthesis of carbon quantum dots using hydride reducing agentsen
dc.typeArticle (peer-reviewed)en
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