Plasmonic Ag Nanoparticles: Correlating Nanofabrication and Aggregation for SERS Detection of Thiabendazole Pesticide

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorConsejo Superior de Investigaciones Científicas (CSIC)-
Autor(es): dc.creatorS Oliveira, Marcelo J.-
Autor(es): dc.creatorBianchi-Carvalho, Isabela-
Autor(es): dc.creatorG Rubira, Rafael J.-
Autor(es): dc.creatorSánchez-Cortés, Santiago-
Autor(es): dc.creatorL Constantino, Carlos J.-
Data de aceite: dc.date.accessioned2025-08-21T19:41:50Z-
Data de disponibilização: dc.date.available2025-08-21T19:41:50Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-10-15-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1021/acsomega.4c07586-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/297434-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/297434-
Descrição: dc.descriptionThe level of aggregation and aggregate morphology of metallic nanoparticles are factors that influence the SERS signal (surface-enhanced Raman scattering), affecting reproducibility and sensitivity. This study presents a systematic evaluation of the colloidal aggregation on the SERS signal by combining transmission electron microscopy and UV-vis extinction spectroscopy. It focuses on the effect of two methods of sample preparation (“external standard method-ESM” and “standard addition method-SAM”) on the SERS signal using the fungicide thiabendazole (TBZ) in Ag colloid as a probe molecule. The TBZ critical concentration (concentration for which SERS reaches the maximum intensity) was 6.0 × 10-6 mol/L for ESM and 1.5 × 10-6 mol/L for SAM. Besides, TBZ exhibited a sigmoid-type isotherm for ESM, indicating formation of a TBZ first layer on Ag nanoparticles at lower concentrations (Ag aggregates more compact; size <500 nm) and TBZ multilayers at higher concentrations (Ag aggregates more branched; >2 μm). For SAM, the TBZ first layer formation was also observed at lower concentrations (Ag aggregates more branched; <2 μm). However, at higher concentrations, the Ag colloid degradation/precipitation was observed (Ag aggregates more compact; >2 μm). The Ag aggregation mechanisms align with reaction-limited colloidal aggregation at lower concentrations and diffusion-limited colloidal aggregation at higher concentrations. We believe these results contribute to the SERS research field despite all of the work already done over its 50-year history.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionUniversity of Windsor-
Descrição: dc.descriptionSchool of Technology and Sciences (FCT) Physics Department Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), São Paulo-
Descrição: dc.descriptionUniversidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP) Institute of Geosciences and Exact Sciences (IGCE) Physics Department, São Paulo-
Descrição: dc.descriptionInstituto de Estructura de la Materia (IEM) Consejo Superior de Investigaciones Científicas (CSIC)-
Descrição: dc.descriptionSchool of Technology and Sciences (FCT) Physics Department Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), São Paulo-
Descrição: dc.descriptionUniversidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP) Institute of Geosciences and Exact Sciences (IGCE) Physics Department, São Paulo-
Formato: dc.format42571-42581-
Idioma: dc.languageen-
Relação: dc.relationACS Omega-
???dc.source???: dc.sourceScopus-
Título: dc.titlePlasmonic Ag Nanoparticles: Correlating Nanofabrication and Aggregation for SERS Detection of Thiabendazole Pesticide-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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