Challenges in surface-enhanced Raman scattering signal for ethephon detection: Theoretical and experimental approaches

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorBianchi-Carvalho, Isabela-
Autor(es): dc.creatorMartin, Cibely S.-
Autor(es): dc.creatorAlves, Gabriel G. B.-
Autor(es): dc.creatorSilva, Jaqueline N.-
Autor(es): dc.creatorBatagin-Neto, Augusto-
Autor(es): dc.creatorConstantino, Carlos J. L.-
Data de aceite: dc.date.accessioned2025-08-21T18:53:07Z-
Data de disponibilização: dc.date.available2025-08-21T18:53:07Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2023-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1002/jrs.6617-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/299052-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/299052-
Descrição: dc.descriptionEthephon, a widely used growth regulator in fruits and vegetables, requires careful monitoring because of its toxicity. However, as far as we know, only two works are found in the literature regarding surface-enhanced Raman scattering (SERS) ethephon detection. Indeed, obtaining the SERS signal revealed to be challenging. Therefore, we have evaluated the SERS signal of ethephon using theoretical (as density functional theory and charge-assisted fragment interaction) and experimental approaches, addressing this limited literature knowledge. Theoretical Raman spectra with Ag or Au atoms at reactive sites exhibited enhanced ethephon SERS signal via Ag-Cl bonding, consistent with the experimental data. Multiple experimental procedures were employed to obtain the SERS signal, including pH variations, salt addition, excitation laser lines, time dependency, and different SERS substrates (Ag colloid and Ag island films). Salt addition (NaCl) improved SERS signal, correlating with Ag colloid aggregation. Analysis in Ag colloid showed the pH 7.0 as optimal for ethephon detection, using freshly prepared Ag colloid + ethephon dispersion with ethephon powder being directly dissolved into Ag colloid. Only the Ag-Cl band intensity improved with time. Ag colloid (wet medium — 633 nm laser line) outperformed Ag island films (dry medium — 785 nm laser line).-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionSchool of Technology and Sciences São Paulo State University (UNESP), SP-
Descrição: dc.descriptionSchool of Engineering São Paulo State University (UNESP), SP-
Descrição: dc.descriptionSchool of Sciences POSMAT São Paulo State University (UNESP), SP-
Descrição: dc.descriptionInstitute of Sciences and Engineering São Paulo State University (UNESP), SP-
Descrição: dc.descriptionSchool of Technology and Sciences São Paulo State University (UNESP), SP-
Descrição: dc.descriptionSchool of Engineering São Paulo State University (UNESP), SP-
Descrição: dc.descriptionSchool of Sciences POSMAT São Paulo State University (UNESP), SP-
Descrição: dc.descriptionInstitute of Sciences and Engineering São Paulo State University (UNESP), SP-
Descrição: dc.descriptionCAPES: 88887.817533/2022-00-
Formato: dc.format75-85-
Idioma: dc.languageen-
Relação: dc.relationJournal of Raman Spectroscopy-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectadsorption mechanism-
Palavras-chave: dc.subjectCAFI-
Palavras-chave: dc.subjectDFT-
Palavras-chave: dc.subjectethephon-
Palavras-chave: dc.subjectSERS-
Título: dc.titleChallenges in surface-enhanced Raman scattering signal for ethephon detection: Theoretical and experimental approaches-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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