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| Registros recuperados : 7 | |
| 3. |  | BOVINI, M. G.; CARVALHO-OKANO, R. M. de; VIEIRA, M. F. Malvaceae A. Juss. no Parque Estadual do Rio Doce, Minas Gerais, Brasil. Rodriguésia, Rio de Janeiro, v. 52, n. 81, p. 17-47, 2001.| Biblioteca(s): Embrapa Florestas. |
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| 4. | | BOVINI, M. G.; CARVALHO-OKANO, R. M. de; VIEIRA, M. F. Malvaceae A. Juss. no Parque Estadual do Rio Doce, Minas Gerais, Brasil. Rodriguésia, Rio de Janeiro, v. 52, n. 81, p. 17-47, 2001.| Biblioteca(s): Embrapa Amazônia Ocidental. |
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| 6. | | VIEIRA, M. F.; PENA, R. da C. M.; LIMA, A. S.; DIAS, J. do S. A.; PERAZZO, F. F.; APARICIO, P. da S. Avaliação da atividade antifúgica do óleo fixo de copaíba (Copaifera sp.) no controle in vitro de Cylindrocladium sp. isoaldo de plantas de cupuaçu (Theobroma grandiflorum). In: CONGRESSO BRASILEIRO DE DEFENSIVOS AGRÍCOLAS NATURAIS, 4., 2008, Belém, PA. Resumos... Belém, PA: Embrapa Amazônia Oriental, 2008. p. 44.| Biblioteca(s): Embrapa Amapá. |
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| 7. | | MELO JUNIOR, C. A. de; ROCHA, D.; BOLFE, E. L.; BRITO, M. J. C.; VIEIRA, M. F. L.; DONALD, R. D. M.; JESUS, A. T. de; MOURA, A. B.; BOAVENTURA, J. S.; LIMA, R. G. Estimativa da carga poluidora das principais indústrias da bacia do Rio Sergipe. In: SIMPÓSIO REGIONAL DE GEOPROCESSAMENTO, 2., 2004, Aracaju. Geotecnologias aplicadas ao nordeste brasileiro: anais. Aracaju: Embrapa Tabuleiros Costeiros, 2004. 1 CD-ROM.| Biblioteca(s): Embrapa Tabuleiros Costeiros. |
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| Registros recuperados : 7 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
03/07/2024 |
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Data da última atualização: |
03/07/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
VIEIRA, M. F.; ALMEIDA, C. G. de; BRANDAO, H. de M.; IZUMI, C. M. S. |
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Afiliação: |
MOYRA 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. |
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Título: |
In situ preparation of silver nanoparticles in polystyrene-b-poly (2-vinylpyridine) films over chemically patterned substrates. |
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Ano de publicação: |
2025 |
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Fonte/Imprenta: |
Journal of the Brazilian Chemical Society, v. 36, n. 1, e-20240096, 2025. |
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DOI: |
https://dx.doi.org/10.21577/0103-5053.20240096 |
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Idioma: |
Inglês |
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Conteúdo: |
The 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. |
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Palavras-Chave: |
Nanopartícula; Poliestireno; Vidro hidrofílico. |
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Thesaurus NAL: |
Nanoparticles. |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1165368/1/In-situ-Preparation-of-Silver-Nanoparticles-in-Polystyrene-b-poly.pdf
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Marc: |
LEADER 02030naa a2200217 a 4500
001 2165368
005 2024-07-03
008 2025 bl uuuu u00u1 u #d
024 7 $ahttps://dx.doi.org/10.21577/0103-5053.20240096$2DOI
100 1 $aVIEIRA, M. F.
245 $aIn situ preparation of silver nanoparticles in polystyrene-b-poly (2-vinylpyridine) films over chemically patterned substrates.$h[electronic resource]
260 $c2025
520 $aThe 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.
650 $aNanoparticles
653 $aNanopartícula
653 $aPoliestireno
653 $aVidro hidrofílico
700 1 $aALMEIDA, C. G. de
700 1 $aBRANDAO, H. de M.
700 1 $aIZUMI, C. M. S.
773 $tJournal of the Brazilian Chemical Society$gv. 36, n. 1, e-20240096, 2025.
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