Two-Dimensional Interfacial Colloidal Crystals
- 18 August 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 45 (7) , 569-572
- https://doi.org/10.1103/physrevlett.45.569
Abstract
Polystyrene spheres (2450 Å in diameter) are trapped in a surface energy well at water/air interface. Because of asymmetry of charge distribution, electrical dipoles are associated with each interfacial particle. The dipole-dipole repulsive interactions organize the polystyrene spheres into a two-dimensional triangular lattice. The direct microscopic observations of such an interfacial colloidal crystal are reported for the first time.Keywords
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