Gold nanoparticles produced using NaBH4 in absence and in the presence of one-tail or two-tail cationic surfactants: Characteristics and optical responses induced by aminoglycosides

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dc.contributor.authorSilva L.I.M.
dc.contributor.authorPerez-Gramatges A.
dc.contributor.authorLarrude D.G.
dc.contributor.authorAlmeida J.M.S.
dc.contributor.authorAucelio R.Q.
dc.contributor.authorda Silva A.R.
dc.date.accessioned2024-03-12T19:20:53Z
dc.date.available2024-03-12T19:20:53Z
dc.date.issued2021
dc.description.abstract© 2021 Elsevier B.V.Gold nanoparticles (AuNPs), produced using sodium borohydride in water (AuNPs-H), also in the presence of the surfactants cetyltrimethylammonium bromide (AuNPs-CTAB) and didecyldimethylammonium bromide (AuNPs-D10AB), were characterized and investigated in terms of their optical localized surface plasmon resonance (LSPR) response. The automation of the syntheses improved reproducibility of AuNPs. CTAB was chosen as a model one-tail surfactant capping agent for AuNPs and D10AB (two-tail surfactant) was employed for the first time, as a capping agent for AuNPs. Thus, it was possible to carry out a comparative study for the production of AuNPs, varying the surfactant concentration levels from 1.0 × 10−2 to 1 × 10-4 mol L-1. The LSPR profiles were monitored in function of the time, taking into account storage conditions (at 4 °C and at 27 °C). A more unstable behavior was observed for the AuNPs produced in the presence of D10AB at 1.0 × 10-4 mol L-1, which suggested the disassembling of AuNPs over time. The catalytic activity of the AuNPs was evaluated in the presence of 4-nitrophenol, and the most effective kinetics were observed for systems containing the one-tail surfactant CTAB, at 1.0 × 10−2 mol L-1 (8 min), and for AuNPs-H, which has no organic coating, (6 min). Finally, the evaluation of the optical response from AuNPs was conducted with four aminoglycosides (AMG), indicating that these surfactants prevent interaction between AMG and the surface of the nanoparticles since at higher concentrations of CTAB or D10AB there is no significant variation in the LSPR spectral band in presence of AMG. In contrast, strong interaction, observed as variation of LSPR band, was found for the AuNPs-H-AMG systems.
dc.description.volume614
dc.identifier.doi10.1016/j.colsurfa.2021.126174
dc.identifier.issn1873-4359
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/34680
dc.relation.ispartofColloids and Surfaces A: Physicochemical and Engineering Aspects
dc.rightsAcesso Restrito
dc.subject.otherlanguageAminoglycosides
dc.subject.otherlanguageCetyltrimethylammonium bromide
dc.subject.otherlanguageDidecyldimethylammonium bromide
dc.subject.otherlanguageGold nanoparticles
dc.subject.otherlanguageLocalized surface plasmon resonance
dc.titleGold nanoparticles produced using NaBH4 in absence and in the presence of one-tail or two-tail cationic surfactants: Characteristics and optical responses induced by aminoglycosides
dc.typeArtigo
local.scopus.citations11
local.scopus.eid2-s2.0-85099785875
local.scopus.subjectCetyl trimethyl ammonium bromides
local.scopus.subjectComparative studies
local.scopus.subjectLocalized surface plasmon resonance
local.scopus.subjectReproducibilities
local.scopus.subjectStorage condition
local.scopus.subjectStrong interaction
local.scopus.subjectSurfactant concentrations
local.scopus.subjectUnstable behavior
local.scopus.updated2024-07-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85099785875&origin=inward
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