| Texto completo | |
| Autor(es): |
da Silva, Anderson G. M.
[1]
;
de Souza, Michele L.
[1]
;
Rodrigues, Thenner S.
[1]
;
Alves, Rafael S.
[1]
;
Temperini, Marcia L. A.
[1]
;
Camargo, Pedro H. C.
[1]
Número total de Autores: 6
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05508000 Sao Paulo - Brazil
Número total de Afiliações: 1
|
| Tipo de documento: | Artigo Científico |
| Fonte: | CHEMISTRY-A EUROPEAN JOURNAL; v. 20, n. 46, p. 15040-15046, NOV 10 2014. |
| Citações Web of Science: | 21 |
| Resumo | |
Metallic nanomaterials displaying hollow interiors as well as sharp tips/branches at their surface (such as hollow nanodendrites) are attractive, because these features enable higher surface-to-volume ratios than their solid and/or rounded counterparts. This paper describes a simple strategy for the synthesis of Ag-Au nanodendrites in 15s using Ag nanospheres prepared in a previous synthetic step as seeds. Our approach was based on the utilization of Ag nanospheres as seeds for Au deposition by a combination of galvanic replacement reaction between Ag and AuCl4-(aq) and AuCl4-(aq) reduction using hydroquinone in the presence of polyvinylpyrrolidone (PVP) as a stabilizer and water as the solvent. The produced Ag-Au nanodendrites presented monodisperse sizes, and their surface morphologies could be tuned as a function of growth time. Owing to their hollow interiors and sharp tips, the Ag-Au nanodendrites performed as effective substrates for surface-enhanced Raman scattering (SERS) detection of 4-MPy (4-mercaptopyridine) and R6G (rhodamine 6G) as probe molecules. We believe that the approach described herein can serve as a protocol for the fast and one-step synthesis of Ag-Au hollow nanondendrites with a wide range of sizes, compositions, and surface morphologies for applications in SERS and catalysis. (AU) | |
| Processo FAPESP: | 12/13119-3 - Espectroscopia Vibracional em Fases Condensadas. |
| Beneficiário: | Mauro Carlos Costa Ribeiro |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 13/10831-7 - Determinação da constante de adsorção molecular em superfície metálica por Espectroscopia Raman Intensificada pela Superfície em regime de uma única molécula |
| Beneficiário: | Michele Lemos de Souza |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 13/19861-6 - Nanomateriais metálicos controlados para aplicações em catálise |
| Beneficiário: | Pedro Henrique Cury Camargo |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |