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The plasmonic effect of gold nanorods on charged molecules: SERRS and SEF effects

dc.contributor.authorOliveira, Tatiana Aparecida [UNESP]
dc.contributor.authorRubira, Rafael Jesus Gonçalves [UNESP]
dc.contributor.authorDa Silva Martin, Cibely [UNESP]
dc.contributor.authorDe Barros, Anerise
dc.contributor.authorMazali, Italo Odone
dc.contributor.authorConstantino, Carlos José Leopoldo [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.date.accessioned2022-04-29T08:32:04Z
dc.date.available2022-04-29T08:32:04Z
dc.date.issued2021-01-01
dc.description.abstractTarget molecules adsorbed onto metallic nanoparticles can have their Raman and/or fluorescence signals enhanced, leading to the called surface-enhanced [resonance] Raman scattering (SE[R]RS) or surface-enhanced fluorescence (SEF). Here we have applied Au nanorods (AuNRs) coated with a surfactant bilayer leading to a positive surface charge to investigate the role played by these AuNRs in colloidal suspension on SERRS and SEF effects of charged molecules. In the case of the anionic nickel (II) tetrasulfonated phthalocyanine (NiTsPc), besides achieving SERRS with an enhancement factor (EF) of ca. 105, the AuNRs allowed the analytical application of the SERRS effect for the NiTsPc between 8.3x10-6 and 4.0x10-5 mol L-1. The limit of detection of 4.8x10-7 mol L-1 (at 752 cm-1) and 1.3x10-6 mol L-1 (at 1338 cm-1) was found. In the case of the cationic methylene blue, the SEF effect was achieved reaching an EF of ca. 10. Besides, fundamental discussions are carried out considering the results presented here.en
dc.description.affiliationUniversidade Estadual Paulista (UNESP) Faculdade de Ciências e Tecnologia Departamento de Física
dc.description.affiliationUniversidade Estadual de Campinas (UNICAMP) Instituto de Química Laboratório de Materiais Funcionais
dc.description.affiliationUnespUniversidade Estadual Paulista (UNESP) Faculdade de Ciências e Tecnologia Departamento de Física
dc.identifierhttp://dx.doi.org/10.1590/1980-5373-MR-2021-0029
dc.identifier.citationMaterials Research, v. 24.
dc.identifier.doi10.1590/1980-5373-MR-2021-0029
dc.identifier.issn1980-5373
dc.identifier.issn1516-1439
dc.identifier.scopus2-s2.0-85112687517
dc.identifier.urihttp://hdl.handle.net/11449/229346
dc.language.isoeng
dc.relation.ispartofMaterials Research
dc.sourceScopus
dc.subjectCharge effect
dc.subjectGold nanorods
dc.subjectSEF
dc.subjectSERRS
dc.titleThe plasmonic effect of gold nanorods on charged molecules: SERRS and SEF effectsen
dc.typeArtigo
unesp.departmentFísica, Química e Biologia - FCTpt

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