Nanostructured Co3O4 Semiconductors for Plasmon-Free SERS Sensing Platforms

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dc.contributor.authorFonsaca J.E.S.
dc.contributor.authorSilva E.E.
dc.contributor.authorTieppo K.
dc.contributor.authorDomingues S.H.
dc.contributor.authorde Matos C.J.S.
dc.date.accessioned2025-05-01T06:24:43Z
dc.date.available2025-05-01T06:24:43Z
dc.date.issued2025
dc.description.abstract© 2025 The Authors. Published by American Chemical Society.Nanostructured semiconductors have garnered interest as nonplasmonic surface-enhanced Raman spectroscopy (SERS) platforms, as they promise to mitigate the drawbacks of metallic substrates. In this work, we report the synthesis and characterization of Co3O4-based nanoflowers and nanosheets and demonstrate the role of each morphology in intensifying the Raman signal of rhodamine 6G (R6G). We carried out a systematic experimental procedure aimed at optimizing the SERS process, which involved relevant (and commonly largely neglected) aspects such as solution mixing and surface concentration of analytes. We show that 2D-Co3O4 detected R6G down to 10-8 mol L-1 and exhibited superior performance compared to its 3D counterpart, possibly due to the greater availability of SERS-active regions (e.g., vacancies, oxygenated sites, etc.) in this conformation. Around 600 spectra were parametrized and analyzed with the aim of evaluating the incidence and reproducibility of the SERS process across the substrate. Finally, we propose a mechanistic path for the Raman enhancement process that identifies charge transfer as the main phenomenon behind the observed SERS.
dc.description.firstpage7876
dc.description.issuenumber15
dc.description.lastpage7886
dc.description.volume8
dc.identifier.doi10.1021/acsanm.5c01647
dc.identifier.issnNone
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/40618
dc.relation.ispartofACS Applied Nano Materials
dc.rightsAcesso Aberto
dc.subject.otherlanguage2D-Co3O4
dc.subject.otherlanguagenonplasmonic substrate
dc.subject.otherlanguageprincipal component analysis (PCA)
dc.subject.otherlanguagesemiconductor
dc.subject.otherlanguageSERS
dc.titleNanostructured Co3O4 Semiconductors for Plasmon-Free SERS Sensing Platforms
dc.typeArtigo
local.scopus.citations0
local.scopus.eid2-s2.0-105003088859
local.scopus.subject2d-co3O4
local.scopus.subjectFree surfaces
local.scopus.subjectNano-structured
local.scopus.subjectNanostructured semiconductor
local.scopus.subjectNonplasmonic substrate
local.scopus.subjectPrincipal component analyze
local.scopus.subjectPrincipal-component analysis
local.scopus.subjectRhodamine 6G
local.scopus.subjectSensing platforms
local.scopus.subjectSurface enhanced Raman spectroscopy
local.scopus.updated2025-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=105003088859&origin=inward
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