In situ preparation of silver nanoparticles in polystyrene-b-poly (2-vinylpyridine) films over chemically patterned substrates.

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dc.contributorMOYRA F. VIEIRA, UNIVERSIDADE FEDERAL DE JUIZ DE FORA; CAMILA G. DE ALMEIDA; HUMBERTO DE MELLO BRANDAO, CNPGL; CELLY M. S. IZUMI, UNIVERSIDADE FEDERAL DE JUIZ DE FORA.
dc.creatorVIEIRA, M. F.
dc.creatorALMEIDA, C. G. de
dc.creatorBRANDAO, H. de M.
dc.creatorIZUMI, C. M. S.
dc.date2024-07-03T15:55:18Z
dc.date2024-07-03T15:55:18Z
dc.date2024-07-03
dc.date2025
dc.date.accessioned2026-07-07T03:56:50Z
dc.descriptionThe present work reports the in situ fabrication of Ag nanoparticles (AgNPs) in polystyreneb-poly(2-vinylpyridine) (PS-b-P2VP) over pre-patterned hydrophobic stripes on a hydrophilic glass surface. Microcontact printing (μCP) using octadecyltrichlorosilane (OTS) as “ink” was used to obtain these chemically modified substrates. A comparison of the results of the PS-b-P2VP self-assembly over a bare glass substrate and a pre-patterned glass substrate demonstrated the influence of the pattern on the film morphology. Polymeric films of Ag+ and PS-b-P2VP were prepared on a pre-patterned substrate and heated at 150 °C to enable the self-reconstruction of the polymeric matrix and the in situ formation of AgNPs (average particle size of approximately 100 nm). The AgNP/PS-b-P2VP thin films were characterized using UV-Vis spectroscopy and atomic force microscopy. The results demonstrate that the concentration of the solutions of Ag+ /PS-b-P2VP used to prepare the films strongly influences the morphologies and dispersion of AgNPs. Moreover, the surface-enhanced Raman spectroscopy (SERS) activity of the fabricated polymer nanocomposites using Nile Blue as a molecular probe shows the importance of the chemical modification of the substrate in the enhancement of the SERS signal.
dc.identifierJournal of the Brazilian Chemical Society, v. 36, n. 1, e-20240096, 2025.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1165368
dc.identifierhttps://dx.doi.org/10.21577/0103-5053.20240096
dc.identifier.urihttp://hdl.handle.net/123456789/448130
dc.languageeng
dc.rightsopenAccess
dc.subjectNanopartícula
dc.subjectPoliestireno
dc.subjectVidro hidrofílico
dc.subjectNanoparticles
dc.titleIn situ preparation of silver nanoparticles in polystyrene-b-poly (2-vinylpyridine) films over chemically patterned substrates.
dc.typeArtigo de periódico

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