Synthesis of oxocarbon-encapsulated gold nanoparticles with blue-shifted localized surface plasmon resonance by pulsed laser ablation in water with CO2 absorbers

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dc.contributor.authorDel Rosso T.
dc.contributor.authorRey N.A.
dc.contributor.authorRosado T.
dc.contributor.authorLandi S.
dc.contributor.authorLarrude D.G.
dc.contributor.authorRomani E.C.
dc.contributor.authorFreire Junior F.L.
dc.contributor.authorQuinteiro S.M.
dc.contributor.authorCremona M.
dc.contributor.authorAucelio R.Q.
dc.contributor.authorMargheri G.
dc.contributor.authorPandoli O.
dc.date.accessioned2024-03-13T00:53:12Z
dc.date.available2024-03-13T00:53:12Z
dc.date.issued2016
dc.description.abstract© 2016 IOP Publishing Ltd.Colloidal suspensions of oxocarbon-encapsulated gold nanoparticles have been synthesized in a one-step procedure by pulsed-laser ablation (PLA) at 532 nm of a solid gold target placed in aqueous solution containing CO2 absorbers, but without any stabilizing agent. Multi-wavelength surface enhanced Raman spectroscopy allows the identification of adsorbed amorphous carbon and graphite, Au-carbonyl, Au coordinated CO2-derived bicarbonates/carbonates and hydroxyl groups around the AuNPs core. Scanning electron microscopy, energy dispersive x-ray analysis and high resolution transmission electron microscopy highlight the organic shell structure around the crystalline metal core. The stability of the colloidal solution of nanocomposites (NCs) seems to be driven by solvation forces and is achieved only in neutral or basic pH using monovalent hydroxide counter-ions (NaOH, KOH). The NCs are characterized by a blue shift of the localized surface plasmon resonance (LSPR) band typical of metal-ligand stabilization by terminal π-back bonding, attributed to a core charging effect caused by Au-carbonyls. Total organic carbon measurements detect the final content of organic carbon in the colloidal solution of NCs that is about six times higher than the value of the water solution used to perform PLA. The colloidal dispersions of NCs are stable for months and are applied as analytical probes in amino glycoside antibiotic LSPR based sensing.
dc.description.issuenumber25
dc.description.volume27
dc.identifier.doi10.1088/0957-4484/27/25/255602
dc.identifier.issn1361-6528
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/35972
dc.relation.ispartofNanotechnology
dc.rightsAcesso Restrito
dc.subject.otherlanguageamino glycoside antibiotic sensing
dc.subject.otherlanguagelocalized surface plasmon resonance
dc.subject.otherlanguageOxocarbons-encapsulated gold nanoparticles
dc.subject.otherlanguagepulsed laser ablation in liquid
dc.subject.otherlanguagesurface enhanced Raman spectroscopy
dc.titleSynthesis of oxocarbon-encapsulated gold nanoparticles with blue-shifted localized surface plasmon resonance by pulsed laser ablation in water with CO2 absorbers
dc.typeArtigo
local.scopus.citations17
local.scopus.eid2-s2.0-84975090348
local.scopus.subjectamino glycoside antibiotic sensing
local.scopus.subjectColloidal dispersion
local.scopus.subjectColloidal solutions
local.scopus.subjectColloidal suspensions
local.scopus.subjectLocalized surface plasmon resonance
local.scopus.subjectPulsed laser ablation in liquids
local.scopus.subjectSurface enhanced Raman spectroscopy
local.scopus.subjectTotal Organic Carbon
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84975090348&origin=inward
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