| Full text | |
| Author(s): |
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]
Total Authors: 6
|
| Affiliation: | [1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05508000 Sao Paulo - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | CHEMISTRY-A EUROPEAN JOURNAL; v. 20, n. 46, p. 15040-15046, NOV 10 2014. |
| Web of Science Citations: | 21 |
| Abstract | |
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) | |
| FAPESP's process: | 13/19861-6 - Controlled metal nanomaterials for catalysis applications |
| Grantee: | Pedro Henrique Cury Camargo |
| Support type: | Regular Research Grants |
| FAPESP's process: | 12/13119-3 - Vibrational spectroscopy in condensed phases |
| Grantee: | Mauro Carlos Costa Ribeiro |
| Support type: | Research Projects - Thematic Grants |
| FAPESP's process: | 13/10831-7 - Determination of the molecular adsorption constant over a metallic surface employing Surface Enhanced Raman Scattering under single-molecule detection |
| Grantee: | Michele Lemos de Souza |
| Support type: | Scholarships in Brazil - Post-Doctorate |