Two-dimensional colloidal alloys.
Phys Rev Lett
; 106(12): 128302, 2011 Mar 25.
Article
em En
| MEDLINE
| ID: mdl-21517357
ABSTRACT
We study the structure of mixed monolayers of large (3 µm diameter) and small (1 µm diameter) very hydrophobic silica particles at an octane-water interface as a function of the number fraction of small particles ξ. We find that a rich variety of two-dimensional hexagonal super-lattices of large (A) and small (B) particles can be obtained in this system due to strong and long-range electrostatic repulsions through the nonpolar octane phase. The structures obtained for the different compositions are in good agreement with zero temperature calculations and finite temperature computer simulations.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article