Size controlled synthesis of silicon nanocrystals using cationic surfactant templates

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dc.contributor.authorLinehan, Keith
dc.contributor.authorDoyle, Hugh
dc.contributor.funderEuropean Commission
dc.date.accessioned2016-05-06T10:41:42Z
dc.date.available2016-05-06T10:41:42Z
dc.date.issued2013-09-11
dc.date.updated2016-04-10T17:49:46Z
dc.description.abstractAlkyl-terminated silicon nanocrystals (Si NCs) are synthesized at room temperature by hydride reduction of silicon tetrachloride (SiCl4) within inverse micelles. Highly monodisperse Si nanocrystals with average diameters ranging from 2 to 6 nm are produced by variation of the cationic quaternary ammonium salts used to form the inverse micelles. Transmission electron microscopy imaging shows that the NCs are highly crystalline, while FTIR spectra confirm that the NCs are passivated by covalent attachment of alkanes, with minimal surface oxidation. UV-vis absorbance and photoluminescence spectroscopy show significant quantum confinement effects, with moderate absorption in the UV spectral range, and a strong blue emission with a marked dependency on excitation wavelength. The photoluminescence quantum yield (Φ) of the Si NCs exhibits an inverse relationship with the mean NC diameter, with a maximum of 12% recorded for 2 nm NCs.en
dc.description.sponsorshipEuropean Commission (FP7 Projects: SNAPSUN, grant agreement no. 246310; CommonSense, grant agreement no. 261809)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationLINEHAN, K. & DOYLE, H. 2014. Size Controlled Synthesis of Silicon Nanocrystals Using Cationic Surfactant Templates. Small, 10, pp. 584-590. doi: 10.1002/smll.201301189en
dc.identifier.doi10.1002/smll.201301189
dc.identifier.endpage590en
dc.identifier.issn1613-6829
dc.identifier.journaltitleSmallen
dc.identifier.startpage584en
dc.identifier.urihttps://hdl.handle.net/10468/2514
dc.identifier.volume10en
dc.language.isoenen
dc.publisherJohn Wiley & Sons, Incen
dc.rights© 2013, John Wiley & Sons, Inc. This is the peer reviewed version of the following article: LINEHAN, K. & DOYLE, H. 2014. Size Controlled Synthesis of Silicon Nanocrystals Using Cationic Surfactant Templates. Small, 10, pp. 584-590, which has been published in final form at http://dx.doi.org/10.1002/smll.201301189. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. http://olabout.wiley.com/WileyCDA/Section/id-820227.html#termsen
dc.subjectSilicon nanocrystalsen
dc.subjectSynthesisen
dc.subjectInverse micelleen
dc.subjectPhotoluminescenceen
dc.subjectQuantum yielden
dc.titleSize controlled synthesis of silicon nanocrystals using cationic surfactant templatesen
dc.typeArticle (peer-reviewed)en
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