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dc.contributor.author Lanterna, Anabel Estela
dc.contributor.author Coronado, Eduardo A.
dc.contributor.author Granados, Alejandro Manuel
dc.date.available 2018-10-09T16:34:32Z
dc.date.issued 2012-03
dc.identifier.citation Lanterna, Anabel Estela; Coronado, Eduardo A.; Granados, Alejandro Manuel; When nanoparticle size and molecular geometry matter: Analyzing the degree of surface functionalization of gold nanoparticles with sulfur heterocyclic compounds; American Chemical Society; Journal of Physical Chemistry C; 116; 11; 3-2012; 6520-6529
dc.identifier.issn 1932-7447
dc.identifier.uri http://hdl.handle.net/11336/61961
dc.description.abstract The degree of surface functionalization of colloidal dispersions of Au nanoparticles (AuNPs) by sulfur heterocyclic compounds is determined using localized surface plasmon resonance spectroscopy (LSPRS), morphological characterization, and electrodynamic modeling. We demonstrate that AuNP surface coverage is the result of the interplay between the molecular geometry of ligands and the Au nanoparticle diameter. For the same ligand, it is found that the surface density of molecules (σ) is almost constant or slightly decreases as the Au nanoparticle diameter increases, while for the same NP size the degree of surface coverage increases as the length of the molecule increases. The chemical interaction between the ligand molecules and the AuNP surface is demonstrated using surface enhanced Raman scattering (SERS) and 1H NMR. For the same average AuNP size, the full width at half maximum (fwhm) of the LSPR is significantly greater for derivatized AuNPs, a feature that shows the important role played by chemical interface damping in NP surface functionalization. The strong chemical stability of the modified AuNPs is further probed against KCN etching, indicating that there is a close correspondence between σ and the slow kinetics of the decay of the LSPR peak. © 2012 American Chemical Society.
dc.format application/pdf
dc.language.iso eng
dc.publisher American Chemical Society
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject Napartículas de Oro
dc.subject 1,2-ditil-3H-3-tiona
dc.subject SERS
dc.subject TEM
dc.subject CN- etching
dc.subject Chemical interface damping
dc.subject Surface functionalization.
dc.subject.classification Otras Ciencias Químicas
dc.subject.classification Ciencias Químicas
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title When nanoparticle size and molecular geometry matter: Analyzing the degree of surface functionalization of gold nanoparticles with sulfur heterocyclic compounds
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2018-09-18T16:15:00Z
dc.journal.volume 116
dc.journal.number 11
dc.journal.pagination 6520-6529
dc.journal.pais Estados Unidos
dc.journal.ciudad Washington
dc.description.fil Fil: Lanterna, Anabel Estela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
dc.description.fil Fil: Coronado, Eduardo A.. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Fisicoquímica; Argentina
dc.description.fil Fil: Granados, Alejandro Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
dc.journal.title Journal of Physical Chemistry C
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1021/jp209816g
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/jp209816g
dc.conicet.fuente individual


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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)