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dc.provenanceCONICET-
dc.creatorGomez, María Lorena-
dc.creatorHoppe, Cristina Elena-
dc.creatorZucchi, Ileana Alicia-
dc.creatorWilliams, Roberto Juan Jose-
dc.creatorGiannotti, Marina Inés-
dc.creatorLópez-Quintela, M. Arturo-
dc.date2018-12-18T18:54:18Z-
dc.date2018-12-18T18:54:18Z-
dc.date2009-01-
dc.date2018-12-05T14:38:25Z-
dc.date.accessioned2019-04-29T15:53:20Z-
dc.date.available2019-04-29T15:53:20Z-
dc.date.issued2009-01-
dc.identifierGomez, María Lorena; Hoppe, Cristina Elena; Zucchi, Ileana Alicia; Williams, Roberto Juan Jose; Giannotti, Marina Inés; et al.; Hierarchical assemblies of gold nanoparticles at the surface of a film formed by a bridged silsesquioxane containing pendant dodecyl chains; American Chemical Society; Langmuir; 25; 2; 1-2009; 1210-1217-
dc.identifier0743-7463-
dc.identifierhttp://hdl.handle.net/11336/66686-
dc.identifierCONICET Digital-
dc.identifierCONICET-
dc.identifier.urihttp://rodna.bn.gov.ar:8080/jspui/handle/bnmm/304706-
dc.descriptionHierarchical aggregates of gold nanoparticles (NPs) on different length scales were in situ generated at the surface of a bridged silsesquioxane during the process of film formation by polycondensation and solvent evaporation. A precursor of a bridged silsesquioxane based on the reaction product of (glycidoxypropyl)trimethoxy silane (2 mol) with dodecylamine (1 mol) was hydrolytically condensed in a THF solution at room temperature in the presence of formic acid, water, and variable amounts of dodecanethiol-stabilized gold NPs (average diameter of 2 nm). The initial compatibility of the precursor with gold NPs was achieved by the presence of dodecyl chains in both components. Phase separation of gold NPs accompanied by partitioning to the air-polymer interface took place driven by the polycondensation reaction and solvent evaporation. A hierarchical organization of gold NPs in the structures generated at the air-polymer interface was observed. Small body-centered cubic (bcc) crystals of about 20 nm diameter were formed in the first step, in which the 2 nm gold NPs kept their individuality (high-resolution transmission electron microscopy, field emission scanning electron microscopy, and small-angle X-ray diffraction). In the second step, bcc crystals aggregated, forming compact micrometer-sized spherical particles. Under particular evaporation rates a third step of the self-assembly process was observed where micrometer-sized particles formed fractal structures. Increasing the initial concentration of gold NPs in the formulation led to more compact fractal structures in agreement with theoretical simulations. The surface percolation of NPs in fractal structures can be the basis of useful applications. © 2009 American Chemical Society.-
dc.descriptionFil: Gomez, María Lorena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina-
dc.descriptionFil: Hoppe, Cristina Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina-
dc.descriptionFil: Zucchi, Ileana Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina-
dc.descriptionFil: Williams, Roberto Juan Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina-
dc.descriptionFil: Giannotti, Marina Inés. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Barcelona; España-
dc.descriptionFil: López-Quintela, M. Arturo. Universidad de Santiago de Compostela; España-
dc.formatapplication/pdf-
dc.formatapplication/pdf-
dc.formatapplication/pdf-
dc.formatapplication/pdf-
dc.formatapplication/pdf-
dc.languageeng-
dc.publisherAmerican Chemical Society-
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1021/la8033403-
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/abs/10.1021/la8033403-
dc.rightsinfo:eu-repo/semantics/restrictedAccess-
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/-
dc.sourcereponame:CONICET Digital (CONICET)-
dc.sourceinstname:Consejo Nacional de Investigaciones Científicas y Técnicas-
dc.sourceinstacron:CONICET-
dc.source.urihttp://hdl.handle.net/11336/66686-
dc.subjectGOLD NANOPARTICLES-
dc.subjectBRIDGED SILSESQUIOXANES-
dc.subjectSELF-ASSEMBLY-
dc.subjectFRACTAL STRUCTURES-
dc.subjectNano-materiales-
dc.subjectNanotecnología-
dc.subjectINGENIERÍAS Y TECNOLOGÍAS-
dc.titleHierarchical assemblies of gold nanoparticles at the surface of a film formed by a bridged silsesquioxane containing pendant dodecyl chains-
dc.typeinfo:eu-repo/semantics/article-
dc.typeinfo:eu-repo/semantics/publishedVersion-
dc.typeinfo:ar-repo/semantics/articulo-
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