Efficient one-pot synthesis of monodisperse alkyl-terminated colloidal germanium nanocrystals

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dc.contributor.author Carolan, Darragh
dc.contributor.author Doyle, Hugh
dc.date.accessioned 2016-05-06T09:26:37Z
dc.date.available 2016-05-06T09:26:37Z
dc.date.issued 2014-12-04
dc.identifier.citation CAROLAN, D. & DOYLE, H. 2014. Efficient one-pot synthesis of monodisperse alkyl-terminated colloidal germanium nanocrystals. Journal of Nanoparticle Research, 16, pp. 1-8. doi: 10.1007/s11051-014-2721-7 en
dc.identifier.volume 16 en
dc.identifier.startpage 1 en
dc.identifier.endpage 8 en
dc.identifier.issn 1572-896X
dc.identifier.uri http://hdl.handle.net/10468/2513
dc.identifier.doi 10.1007/s11051-014-2721-7
dc.description.abstract An efficient one-pot method for fabricating alkyl-capped germanium nanocrystals (Ge NCs) is reported. Ge NCs with a size of 3.9 ± 0.5 nm, are formed by co-reduction of germanium tetrachloride in the presence of n-butyltrichlorogermane, producing NCs with butyl-terminated surfaces. The advantage of this method is that it allows rapid synthesis and functionalisation of NCs with minimal post-synthetic purification requirements. TEM imaging showed that the Ge NCs are monodisperse and highly crystalline, while EDX and SAED confirmed the chemical identity and crystal phase of the NCs. FTIR and XPS confirmed that the Ge NCs were well passivated, with some oxidation of the nanocrystal surface. Optical spectroscopy of the NCs showed a strong absorbance in the UV region and an excitation wavelength dependent photoluminescence in the UV/violet. Time resolved photoluminescence measurements showed the presence of two nanosecond lifetime components, consistent with recombination of photogenerated excitons at low lying energy states present at the nanocrystal surface. Photoluminescence quantum yields were determined to be 37 %, one of the highest values reported for organically terminated Ge NCs. en
dc.description.sponsorship European Commission (FP7 Projects: HYSENS, grant agreement no. 263091; CommonSense, grant agreement no. 261809); Higher Education Authority (PRTLI program: Cycle 3 “Nanoscience” and Cycle 4 “INSPIRE”) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Springer Science+Business Media B.V. en
dc.rights © 2014, Springer Science+Business Media B.V. The final publication is available at Springer via http://dx.doi.org/10.1007/s11051-014-2721-7 en
dc.subject Germanium en
dc.subject Photoluminescence en
dc.subject Quantum yield en
dc.subject Semiconductors en
dc.subject Nanoelectronics en
dc.subject Nanocrystals en
dc.subject Synthesis en
dc.title Efficient one-pot synthesis of monodisperse alkyl-terminated colloidal germanium nanocrystals en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Hugh Doyle, Micro-Nanoelectronics Centre, Tyndall National Institute, Cork, Ireland. +353-21-490-4310 Email: hugh.doyle@tyndall.ie en
dc.internal.availability Full text available en
dc.date.updated 2016-04-10T17:57:00Z
dc.description.version Accepted Version en
dc.internal.rssid 343806509
dc.contributor.funder Higher Education Authority en
dc.contributor.funder European Commission
dc.description.status Peer reviewed en
dc.identifier.journaltitle Journal of Nanoparticle Research en
dc.internal.copyrightchecked Yes. !!CORA!! AV permitted by the publisher: "Authors may self-archive the author’s accepted manuscript of their articles on their own websites. Authors may also deposit this version of the article in any repository, provided it is only made publicly available 12 months after official publication or later." http://www.springer.com/gp/open-access/authors-rights/self-archiving-policy/2124 en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress hugh.doyle@tyndall.ie en

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