Self-organization of hierarchical structures of peptide in solution in presence of...
| Full text | |
| Author(s): |
Slater, Thomas J. A.
[1]
;
Macedo, Alexandra
[2]
;
Schroeder, Sven L. M.
[3, 4]
;
Burke, M. Grace
[1]
;
O'Brien, Paul
[3, 1]
;
Camargo, Pedro H. C.
[2]
;
Haigh, Sarah J.
[1]
Total Authors: 7
|
| Affiliation: | [1] Univ Manchester, Sch Mat, Manchester M13 9PL, Lancs - England
[2] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05508000 Sao Paulo - Brazil
[3] Univ Manchester, Sch Chem, Manchester M13 9PL, Lancs - England
[4] Univ Manchester, Sch Chem Engn & Analyt Sci, Manchester M13 9PL, Lancs - England
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | Nano Letters; v. 14, n. 4, p. 1921-1926, APR 2014. |
| Web of Science Citations: | 76 |
| Abstract | |
Significant elemental segregation is shown to exist within individual hollow silver-gold (Ag-Au) bimetallic nanoparticles obtained from the galvanic reaction between Ag particles and AuCl4-. Three-dimensional compositional mapping using energy dispersive Xray (EDX) tomography within the scanning transmission electron microscope (STEM) reveals that nanoparticle surface segregation inverts from Au-rich to Ag-rich as Au content increases. Maximum Au surface coverage was observed for nanoparticles with approximately 25 atom % Au, which correlates to the optimal catalytic performance in a three-component coupling reaction among cyclohexane carboxyaldehyde, piperidine, and phenylacetylene. (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: | 11/06847-0 - Multimetallic nanostructures with hollow interiors and well-defined sizes, shapes and compositions |
| Grantee: | Pedro Henrique Cury Camargo |
| Support type: | Regular Research Grants |