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dc.contributor.authorAbdelhameed, Mohammed
dc.contributor.authorRota Martir, Diego
dc.contributor.authorChen, Shalimar
dc.contributor.authorXu, William Z.
dc.contributor.authorOyeneye, Olabode O.
dc.contributor.authorChakrabarti, Subrata
dc.contributor.authorZysman-Colman, Eli
dc.contributor.authorCharpentier, Paul A.
dc.identifier.citationAbdelhameed , M , Rota Martir , D , Chen , S , Xu , W Z , Oyeneye , O O , Chakrabarti , S , Zysman-Colman , E & Charpentier , P A 2018 , ' Tuning the optical properties of silicon quantum dots via surface functionalization with conjugated aromatic fluorophores ' , Scientific Reports , vol. 8 , 3050 .
dc.identifier.otherPURE: 252171493
dc.identifier.otherPURE UUID: b94239e6-4068-4791-85b4-7b12bfc4b9c1
dc.identifier.otherScopus: 85042097759
dc.identifier.otherORCID: /0000-0001-7183-6022/work/56639123
dc.identifier.otherWOS: 000424985800088
dc.descriptionThe authors acknowledge Karen Nygard at UWO Biotron for assistance with confocal microscopy. This work was financially supported by NSERC Canada Discovery (Charpentier).en
dc.description.abstractSilicon Quantum Dots (SQDs) have recently attracted great interest due to their excellent optical properties, low cytotoxicity, and ease of surface modification. The size of SQDs and type of ligand on their surface has a great influence on their optical properties which is still poorly understood. Here we report the synthesis and spectroscopic studies of three families of unreported SQDs functionalized by covalently linking to the aromatic fluorophores, 9-vinylphenanthrene, 1-vinylpyrene, and 3-vinylperylene. The results showed that the prepared functionalized SQDs had a highly-controlled diameter by HR-TEM, ranging from 1.7–2.1 nm. The photophysical measurements of the assemblies provided clear evidence for efficient energy transfer from the fluorophore to the SQD core. Fӧrster energy transfer is the likely mechanism in these assemblies. As a result of the photogenerated energy transfer process, the emission color of the SQD core could be efficiently tuned and its emission quantum efficiency enhanced. To demonstrate the potential application of the synthesized SQDs for bioimaging of cancer cells, the water-soluble perylene- and pyrene-capped SQDs were examined for fluorescent imaging of HeLa cells. The SQDs were shown to be of low cytotoxicity.
dc.relation.ispartofScientific Reportsen
dc.rights© 2018 the Authors. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
dc.subjectSilicon Quantum Dotsen
dc.subjectEnergy transferen
dc.subjectQD Chemistryen
dc.subjectSDG 3 - Good Health and Well-beingen
dc.titleTuning the optical properties of silicon quantum dots via surface functionalization with conjugated aromatic fluorophoresen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Chemistryen
dc.contributor.institutionUniversity of St Andrews. Organic Semiconductor Centreen
dc.contributor.institutionUniversity of St Andrews. EaSTCHEMen
dc.description.statusPeer revieweden

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