A new figure of merit to assess the SERS enhancement factor of colloidal gold nanoparticle aggregates

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Autor(es): dc.contributorUniversidad Nacional de Córdoba-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorMercadal, Pablo A.-
Autor(es): dc.creatorEncina, Ezequiel R.-
Autor(es): dc.creatorVilla, Javier E. L. [UNESP]-
Autor(es): dc.creatorCoronado, Eduardo A.-
Data de aceite: dc.date.accessioned2022-02-22T00:49:58Z-
Data de disponibilização: dc.date.available2022-02-22T00:49:58Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-02-25-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1021/acs.jpcc.0c09122-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/207355-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/207355-
Descrição: dc.descriptionPlasmonic nanoparticle aggregates are one of the most widely employed nanostructures as colloidal surface enhanced Raman spectroscopy (SERS) substrates mainly due to their ability to generate huge near-field enhancements. However, the available definitions to determine the enhancement factor, a key parameter to quantitatively describe the quality of SERS substrates, exhibit important limitations to adequately describe the performance of colloidal plasmonic nanoparticle aggregates as SERS platforms. Herein, we introduce a new figure of merit named active concentration enhancement factor (ACEF) to assess the SERS enhancement factor of colloidal gold nanoparticle aggregates, which shows significant improvements to characterize the SERS performance with respect to formerly reported parameters. The determination of the analyte active concentration, that is, the concentration of analyte molecules that effectively contributes to the SERS signal, was achieved according to a strategy that involves a rigorous modeling of the extinction spectra of the colloidal gold nanoparticle aggregates. Furthermore, the experimentally obtained ACEF values can be directly compared with theoretically calculated electromagnetic field enhancement factors. We believe that the figure of merit introduced might help to strengthen the development and design of SERS substrates.-
Descrição: dc.descriptionINFIQC-UNC-CONICET Departamento de Fisicoquímica Facultad de Ciencias Químicas Universidad Nacional de Córdoba-
Descrição: dc.descriptionDepartamento de Química Analítica Instituto de Química Universidade Estadual Paulista (UNESP)-
Descrição: dc.descriptionDepartamento de Química Analítica Instituto de Química Universidade Estadual Paulista (UNESP)-
Formato: dc.format4056-4065-
Idioma: dc.languageen-
Relação: dc.relationJournal of Physical Chemistry C-
???dc.source???: dc.sourceScopus-
Título: dc.titleA new figure of merit to assess the SERS enhancement factor of colloidal gold nanoparticle aggregates-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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