An in situ SAXS investigation of the formation of silver nanoparticles and bimetallic silver–gold nanoparticles in controlled wet-chemical reduction synthesis

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dc.contributor.authorGARCIA, PAULO R.A.F.pt_BR
dc.contributor.authorPRYMAK, OLEGpt_BR
dc.contributor.authorGRASMIK, VIKTORIApt_BR
dc.contributor.authorPAPPERT, KEVINpt_BR
dc.contributor.authorWLYSSES, WAGNERpt_BR
dc.contributor.authorOTUBO, LARISSApt_BR
dc.contributor.authorEPPLE, MATTHIASpt_BR
dc.contributor.authorOLIVEIRA, CRISTIANO L.P.pt_BR
dc.coverageInternacionalpt_BR
dc.date.accessioned2020-04-06T11:41:33Z
dc.date.available2020-04-06T11:41:33Z
dc.date.issued2020pt_BR
dc.description.abstractWe present a study on the formation of silver (Ag) and bimetallic silver–gold (AgAu) nanoparticlesmonitored by in situ SAXS as well as by ex situ TEM, XRD and UV-vis analysis in a flow reactor at controlled reaction temperature. The formation mechanism of the nanoparticles is derived from the structural parameters obtained from the experimental data. The evolution of the average particle size of pure and alloyed nanoparticles shows that the particle growth occurs initially by a coalescence mechanism. The later growth of pure silver nanoparticles is well described by Ostwald ripening and for the alloyed nanoparticles by a process with a significantly slower growth rate. Additionally, the SAXS data of pure silver nanoparticles revealed two major populations of nanoparticles, the first one with a continuous crystal growth to a saturation plateau, and the second one probably with a continuous emergence of small new crystals. The particle sizes obtained by SAXS agree well with the results from transmission electron microscopy and X-ray diffraction. The present study demonstrates the capability of an in situ investigation of synthesis processes using a laboratory based SAXS instrument. Online monitoring of the synthesis permitted a detailed investigation of the structural evolution of the system.pt_BR
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)pt_BR
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorshipIDCAPES: 431/15; 57139595; 001pt_BR
dc.description.sponsorshipIDCNPq: 304861/2015-4pt_BR
dc.description.sponsorshipIDFAPESP: 16/24531-3; 18/16092-5pt_BR
dc.format.extent225-238pt_BR
dc.identifier.citationGARCIA, PAULO R.A.F.; PRYMAK, OLEG; GRASMIK, VIKTORIA; PAPPERT, KEVIN; WLYSSES, WAGNER; OTUBO, LARISSA; EPPLE, MATTHIAS; OLIVEIRA, CRISTIANO L.P. An in situ SAXS investigation of the formation of silver nanoparticles and bimetallic silver–gold nanoparticles in controlled wet-chemical reduction synthesis. <b>Nanoscale Advances</b>, v. 2, n. 1, p. 225-238, 2020. DOI: <a href="https://dx.doi.org/10.1039/c9na00569b">10.1039/c9na00569b</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/31076.
dc.identifier.doi10.1039/c9na00569bpt_BR
dc.identifier.fasciculo1pt_BR
dc.identifier.issn2516-0230pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-6078-229X
dc.identifier.percentilfiSem Percentilpt_BR
dc.identifier.percentilfiCiteScore52.60
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/31076
dc.identifier.vol2pt_BR
dc.relation.ispartofNanoscale Advancespt_BR
dc.rightsclosedAccesspt_BR
dc.subjectnanoparticles
dc.subjectsmall angle scattering
dc.subjectx-ray diffraction
dc.subjectsilver
dc.subjectbimetals
dc.subjectgold
dc.subjectmonte carlo method
dc.subjectnanostructures
dc.subjectalloys
dc.titleAn in situ SAXS investigation of the formation of silver nanoparticles and bimetallic silver–gold nanoparticles in controlled wet-chemical reduction synthesispt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorLARISSA OTUBO
ipen.codigoautor9697
ipen.contributor.ipenauthorLARISSA OTUBO
ipen.date.recebimento20-04
ipen.identifier.fiSem F.I.pt_BR
ipen.identifier.fiCiteScore3.0
ipen.identifier.ipendoc26862pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublicationd4213c42-72f0-4acc-956e-bdb70003cdee
relation.isAuthorOfPublication.latestForDiscoveryd4213c42-72f0-4acc-956e-bdb70003cdee
sigepi.autor.atividadeOTUBO, LARISSA:9697:711:Npt_BR
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