SAXS study of monodispersed silica nanospheres obtained by an amino acid route

dc.contributor.authorBertholdo, Roberto [UNESP]
dc.contributor.authordos Reis, Flavia V. E. [UNESP]
dc.contributor.authorPulcinelli, Sandra Helena [UNESP]
dc.contributor.authorSantilli, Celso Valentim [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:30:46Z
dc.date.available2014-05-20T15:30:46Z
dc.date.issued2010-10-01
dc.description.abstractSpherical silica nanoparticles were prepared using a basic amino acid catalysis route and the kinetics of the particles growth was investigated by small angle X-ray scattering (SAXS). L-arginine was used in the polar aqueous phase as the basic catalyst whereas the tetraethylorthosilicate (TEOS) was dissolved in the cyclohexane oil phase as the silicate monomer source. The SAXS measurements were taken in the aqueous phase at different reaction times. A high degree of monodispersity was clearly evidenced for the spherical nanoparticles as a result of the pronounced high-order oscillations observed in the SAXS curves. The SAXS data show that the particles number density remains unchanged since both the particle size as well as the volume fraction gradually increase. This process was discussed based on a reaction-controlled addition of monomer species at the surface of the growing particles. Consequently, the monodispersed spherical nanoparticles radius can as such be finely tuned from 7 to 12 nm by varying the reaction time. (C) 2010 Elsevier B.V. All rights reserved.en
dc.description.affiliationSão Paulo State Univ, UNESP, BR-14800900 Araraquara, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ, UNESP, BR-14800900 Araraquara, SP, Brazil
dc.format.extent2622-2625
dc.identifierhttp://dx.doi.org/10.1016/j.jnoncrysol.2010.05.011
dc.identifier.citationJournal of Non-crystalline Solids. Amsterdam: Elsevier B.V., v. 356, n. 44-49, p. 2622-2625, 2010.
dc.identifier.doi10.1016/j.jnoncrysol.2010.05.011
dc.identifier.issn0022-3093
dc.identifier.lattes9971202585286967
dc.identifier.lattes5584298681870865
dc.identifier.orcid0000-0002-8356-8093
dc.identifier.urihttp://hdl.handle.net/11449/40085
dc.identifier.wosWOS:000285282100064
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Non-Crystalline Solids
dc.relation.ispartofjcr2.488
dc.relation.ispartofsjr0,722
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectSilica nanoparticlesen
dc.subjectMonodispersed spheresen
dc.subjectAmino aciden
dc.subjectSAXSen
dc.titleSAXS study of monodispersed silica nanospheres obtained by an amino acid routeen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes9971202585286967
unesp.author.lattes5584298681870865[4]
unesp.author.orcid0000-0002-8356-8093[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt
unesp.departmentFísico-Química - IQARpt

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