| Texto completo | |
| Autor(es): |
Zanchet‚ D.
;
Moreno‚ MS
;
Ugarte‚ D.
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Physical Review Letters; v. 82, n. 26, p. 5277-5280, 1999. |
| Resumo | |
We report a structural study of gold nanoparticle supercrystals formed by a few layers and of micrometer size, where the long-range order has been stimulated by a soft thermal annealing. We have clearly identified an expansion of the first layer lying on amorphous carbon substrate and an ordered second layer sitting on twofold saddle points. The third nanoparticle layer recovers the conventional close-packed stacking. This anomalous packing has been explained by means of a simple theoretical model based on dispersional forces. (AU) | |
| Processo FAPESP: | 96/12550-8 - Synthesis and characterization of nanostructure materials |
| Beneficiário: | Daniela Zanchet |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |