Highly swollen liquid crystals as new reactors for the synthesis of nanomaterials

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dc.contributor.authorSurendran, G.
dc.contributor.authorTokumoto, M. S.
dc.contributor.authordos Santos, E. P.
dc.contributor.authorRemita, H.
dc.contributor.authorRamos, L.
dc.contributor.authorKooyman, P. J.
dc.contributor.authorSantilli, Celso Valentim [UNESP]
dc.contributor.authorBourgaux, C.
dc.contributor.authorDieudonne, P.
dc.contributor.authorProuzet, E.
dc.contributor.institutionInst Europeen Membranes
dc.contributor.institutionUniv Paris 11
dc.contributor.institutionUniv Montpellier 2
dc.contributor.institutionDelft Univ Technol
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:30:10Z
dc.date.available2014-05-20T15:30:10Z
dc.date.issued2005-03-22
dc.description.abstractSynthesis and self-assembly of nanomaterials can be controlled by the properties of soft matter. on one hand, dedicated nanoreactors such as reverse microemulsions or miniemulsions can be designed. on the other hand, direct shape control can be provided by the topology of liquid crystals that confine the reacting medium within a specific geometry. In the first case, the preparation of micro- or miniemulsions generally requires energetic mechanical stirring. The second approach uses thermodynamically stable systems, but it remains usually limited to binary (water + surfactant) systems. We report the preparation of different families of materials in highly ordered quaternary mediums that exhibit a liquid crystal structure with a high cell parameter. They were prepared with the proper ratios of salted water, nonpolar solvent, surfactant. and cosurfactants that form spontaneously swollen hexagonal phases. These swollen liquid crystals can be prepared from all classes of surfactants (cationic, anionic, and nonionic). They contain a regular network of parallel cylinders, whose diameters can be swollen with a nonpolar solvent, that are regularly spaced in a continuous aqueous salt solution. We demonstrate in the present report that both aqueous and organic phases can be used as nanoreactors for the preparation of materials. This property is illustrated by various examples such as the synthesis of platinum nanorods prepared in the aqueous phase or zirconia needles or the photo- or gamma-ray-induced polymerization of polydiacetylene in the organic phase. In all cases, materials can be easily extracted and their final shapes are directed by the structure-directing effect imposed by the liquid crystal.en
dc.description.affiliationInst Europeen Membranes, CNRS, UMR 5635, F-34293 Montpellier, France
dc.description.affiliationUniv Paris 11, Chim Phys Lab, CNRS, UMR 8000, F-91400 Orsay, France
dc.description.affiliationUniv Montpellier 2, Dynam Phases Condensees Grp, CNRS, UMR 5581, F-34095 Montpellier, France
dc.description.affiliationDelft Univ Technol, Natl Ctr HREM, NL-2628 AL Delft, Netherlands
dc.description.affiliationUNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil
dc.description.affiliationUniv Paris 11, LURE, CNRS, UMR 130, F-91402 Orsay, France
dc.description.affiliationUnespUNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil
dc.format.extent1505-1514
dc.identifierhttp://dx.doi.org/10.1021/cm0484495
dc.identifier.citationChemistry of Materials. Washington: Amer Chemical Soc, v. 17, n. 6, p. 1505-1514, 2005.
dc.identifier.doi10.1021/cm0484495
dc.identifier.issn0897-4756
dc.identifier.lattes5584298681870865
dc.identifier.orcid0000-0002-8356-8093
dc.identifier.urihttp://hdl.handle.net/11449/39611
dc.identifier.wosWOS:000227772100037
dc.language.isoeng
dc.publisherAmer Chemical Soc
dc.relation.ispartofChemistry of Materials
dc.relation.ispartofjcr9.890
dc.relation.ispartofsjr4,675
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleHighly swollen liquid crystals as new reactors for the synthesis of nanomaterialsen
dc.typeArtigo
dcterms.licensehttp://pubs.acs.org/paragonplus/copyright/jpa_form_a.pdf
dcterms.rightsHolderAmer Chemical Soc
unesp.author.lattes5584298681870865[7]
unesp.author.orcid0000-0002-8356-8093[7]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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Artigos - Físico Química - IQ