The importance of evaluating the real metal concentration in nanoparticles post-synthesis for their applications: A case-study using silver nanoparticles

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dc.contributor.authorGalazzi, Rodrigo Moretto
dc.contributor.authorSantos, Elias de Barros [UNIFESP]
dc.contributor.authorCaurin, Tatiana
dc.contributor.authorPessoa, Gustavo de Souza
dc.contributor.authorMazali, Italo Odone
dc.contributor.authorZezzio Arruda, Marco Aureli
dc.date.accessioned2018-07-26T17:30:34Z
dc.date.available2018-07-26T17:30:34Z
dc.date.issued2016
dc.description.abstractTo determine whether the effect observed in a study is related to the nanoparticle only or to their synergic effect with the "free" metal ions, the real concentration of silver (104 +/- 8 and 100 +/- 2 mg L-1) after AgNP synthesis is obtained through ICP-MS and ICP OES in the solution after the AgNP synthesis and in different fractions after centrifugation (at 8100g for 40 min). From the resuspension of the AgNP contained in the solution (AgNP-total) after synthesis (AgNP-res), concentrations of 49 +/- 3 and 51 3 mg L-1 are found and concentrations of 50 +/- 7 and 47 +/- 2 mg L-1 in the supernatant (Ag-sup) are found using ICP-MS and ICP OES respectively. The characterization of AgNP-total, AgNP-res and Ag-sup is performed by HRTEM and UV-vis, corroborating the results in terms of Ag determination, and indicates that half of the total silver concentration is in the AgNP form and that the other half is in the "free" silver form. The results of the stability test of the NPs indicate a 7% decrease in Ag as NP three months after its synthesis. (C) 2015 Elsevier B.V. All rights reserved.en
dc.description.affiliationSpectrometry, Sample Preparation and Mechanization Group, Institute of Chemistry, University of Campinas – Unicamp, P.O. Box 6154, Campinas, SP 13083-970, Brazil
dc.description.affiliationNational Institute of Science and Technology for Bioanalytics, Institute of Chemistry, University of Campinas – Unicamp, P.O. Box 6154, Campinas, SP 13083-970, Brazil
dc.description.affiliationInstitute of Science and Technology, Federal University of São Paulo, 12231-280 São José dos Campos-SP, Brazil
dc.description.affiliationFunctional Materials Laboratory, Institute of Chemistry, University of Campinas – Unicamp, P.O. Box 6154, Campinas, SP 13083-970, Brazil
dc.description.affiliationUnifespInstitute of Science and Technology, Federal University of São Paulo, 12231-280 São José dos Campos-SP, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent795-800
dc.identifierhttp://dx.doi.org/10.1016/j.talanta.2015.06.016
dc.identifier.citationTalanta. Amsterdam, v. 146, p. 795-800, 2016.
dc.identifier.doi10.1016/j.talanta.2015.06.016
dc.identifier.issn0039-9140
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/46106
dc.identifier.wosWOS:000363815600107
dc.language.isoeng
dc.publisherElsevier Science Bv
dc.relation.ispartofTalanta
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectSilver nanoparticlesen
dc.subjectCharacterizationen
dc.subjectSilver determinationen
dc.subjectApplicationsArabidopsis-Thalianaen
dc.subjectAqueous-Solutionen
dc.subjectAntibacterialen
dc.subjectClustersen
dc.titleThe importance of evaluating the real metal concentration in nanoparticles post-synthesis for their applications: A case-study using silver nanoparticlesen
dc.typeinfo:eu-repo/semantics/article
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