Silver Nanoparticle-Mesoporous Oxide Nanocomposite Thin Films: A Platform for Spatially Homogeneous SERS-Active Substrates with Enhanced Stability

We introduce a nanoparticle-mesoporous oxide thin film composite (NP-MOTF) as low-cost and straightforward sensing platforms for surface-enhanced Raman Spectroscopy (SERS). Titania, zirconia, and silica mesoporous matrices templated with Pluronics F-127 were synthesized via evaporation-induced self-...

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Detalhes bibliográficos
Autores: Wolosiuk, Alejandro, Tognalli, Nicolas Gerardo, Martínez, Eduardo David, Granada, Mara, Fuertes, María Cecilia, Troiani, Horacio Esteban, Bilmes, Sara A., Fainstein, Alejandro, Soler Illia, Galo Juan de Avila Arturo
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2014
País:Argentina
Recursos:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositório:CONICET Digital (CONICET)
Idioma:inglês
OAI Identifier:oai:ri.conicet.gov.ar:11336/31848
Acesso em linha:http://hdl.handle.net/11336/31848
Access Level:Acceso aberto
Palavra-chave:SURFACE-ENHANCED RAMAN SPECTROSCOPY (SERS)
MESOPOROUS THIN FILMS
SILVER NANOPARTICLES
PHOTODEPOSITION
SENSORS
PLASMONICS
https://purl.org/becyt/ford/2.10
https://purl.org/becyt/ford/2
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
Descrição
Resumo:We introduce a nanoparticle-mesoporous oxide thin film composite (NP-MOTF) as low-cost and straightforward sensing platforms for surface-enhanced Raman Spectroscopy (SERS). Titania, zirconia, and silica mesoporous matrices templated with Pluronics F-127 were synthesized via evaporation-induced self-assembly and loaded with homogeneously dispersed Ag nanoparticles by soft reduction or photoreduction. Both methods give rise to uniform and reproducible Raman signals using 4-mercaptopyridine as a probe molecule. Details on stability and reproducibility of the Raman enhancement are discussed. Extensions in the design of these composite structures were explored including detection of nonthiolated molecules, such as rhodamine 6-G or salicylic acid, patterning techniques for locating the enhancement regions and bilayered mesoporous structures to provide additional control on the environment, and potential size-selective filtration. These inorganic oxide–metal composites stand as extremely simple, reproducible, and versatile platforms for Raman spectroscopy analysis.

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