Spontaneous formation of highly dispersed spheroidal metallic silver nanoparticles in surfactant-free N,N-dimethylacetamide

dc.creatorda Costa, LP
dc.creatorFormiga, ALB
dc.creatorMazali, IO
dc.creatorSigoli, FA
dc.date2011
dc.dateAUG
dc.date2014-07-30T20:02:29Z
dc.date2015-11-26T16:57:17Z
dc.date2014-07-30T20:02:29Z
dc.date2015-11-26T16:57:17Z
dc.date.accessioned2018-03-28T23:44:49Z
dc.date.available2018-03-28T23:44:49Z
dc.identifierSynthetic Metals. Elsevier Science Sa, v. 161, n. 15-16, n. 1517, n. 1521, 2011.
dc.identifier0379-6779
dc.identifierWOS:000294971700010
dc.identifier10.1016/j.synthmet.2011.04.018
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/74423
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/74423
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1277621
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionThe present work describes a simple method for preparing highly dispersed spheroidal metallic silver nanoparticles in surfactant-free N,N-dimethylacetamide solution. The optical properties, shape and size of the metallic silver nanoparticles obtained in N,N-dimethylacetamide after different times of reaction were characterized using UV-vis absorption spectroscopy and transmission electron microscopy. The average size of the metallic silver nanoparticles is smaller than that obtained by the well established procedure using N,N-dimethyformamide. Using optimized geometries for N,N-dimethylacetamide and N,N-dimethyformamide, vertical ionization energies and electron affinities were calculated by means of the UHF/DFT calculations of cations and anions, respectively. The difference between ionization energies and electron affinities is higher for N,N-dimethyformamide indicating that it is a harder base than N,N-dimethylacetamide. Therefore, N,N-dimethyformamide probably interacts more weakly with Ag(I) ions than does N,N-dimethylacetamide. The strength of this chemical interaction has implications on the stabilization and dispersion of silver nanoparticles obtained in N,N-dimethylacetamide. The low cost, simple methodology may be used as a platform for further studies in surface-enhanced Raman spectroscopy as well as with other optical properties that depend on the surface plasmon resonance of metallic silver nanoparticles. (C) 2011 Elsevier B.V. All rights reserved.
dc.description161
dc.description15-16
dc.description1517
dc.description1521
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.languageen
dc.publisherElsevier Science Sa
dc.publisherLausanne
dc.publisherSuíça
dc.relationSynthetic Metals
dc.relationSynth. Met.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectSilver nanoparticles
dc.subjectPlasmon
dc.subjectN,N-Dimethylacetamide
dc.subjectCorrelation-energy
dc.subjectAqueous-solution
dc.subjectBasis-set
dc.subjectDensity
dc.subjectReduction
dc.subjectExchange
dc.subjectAg+
dc.subjectApproximation
dc.subjectMonolayers
dc.titleSpontaneous formation of highly dispersed spheroidal metallic silver nanoparticles in surfactant-free N,N-dimethylacetamide
dc.typeArtículos de revistas


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