Artículos de revistas
Anomalous packing in thin nanoparticle supercrystals
Registro en:
Physical Review Letters. American Physical Soc, v. 82, n. 26, n. 5277, n. 5280, 1999.
0031-9007
WOS:000081152700025
10.1103/PhysRevLett.82.5277
Autor
Zanchet, D
Moreno, MS
Ugarte, D
Institución
Resumen
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. 82 26 5277 5280