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Evolution of pseudo-spherical silicon nanocrystals to tetrahedra, mediated by phosphonic acid surfactants.

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dc.contributor.author Barrett, Christopher A.
dc.contributor.author Dickinson, Calum
dc.contributor.author Ahmed, Shafaat
dc.contributor.author Hantschel, Thomas
dc.contributor.author Arstila, Kai
dc.contributor.author Ryan, Kevin M.
dc.date.accessioned 2012-02-20T16:53:31Z
dc.date.available 2012-02-20T16:53:31Z
dc.date.issued 2009
dc.identifier.uri http://hdl.handle.net/10344/2023
dc.description peer-reviewed en_US
dc.description.abstract Silicon nanocrystals were synthesised at high temperatures and high pressures by the thermolysis of diphenylsilane using a combination of supercritical carbon dioxide and phosphonic acid surfactants. Size and shape evolution from pseudo-spherical silicon nanocrystals to well faceted tetrahedral-shaped silicon crystals with edge lengths in the range of 30-400 nm were observed with sequentially decreasing surfactant chain lenghts. The silicon nanocrystals were characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), photoluminescence (PL), scanning electron microscopy (SEM) and Raman scattering spectroscopy. en_US
dc.language.iso eng en_US
dc.publisher IOP Science en_US
dc.relation.ispartofseries Nanotechnology;20,275605
dc.relation.uri http://dx.doi.org/10.1088/0957-4484/20/27/275605
dc.relation.uri http://dx.doi.org/10.1080/03323310903522677
dc.subject nanocrystals en_US
dc.subject carbon dioxide en_US
dc.title Evolution of pseudo-spherical silicon nanocrystals to tetrahedra, mediated by phosphonic acid surfactants. en_US
dc.type Article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.type.restriction none en
dc.contributor.sponsor SFI
dc.relation.projectid 06/IN,1/I85
dc.internal.authorcontactother kevin.m.ryan@ul.ie


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