Choi, Yongki; Kim, Kipom; Pak, Hyuk Kyu - In: Physica A: Statistical Mechanics and its Applications 281 (2000) 1, pp. 99-104
Two-dimensional crystal is tested in the system of several millimeter size polystyrene spheres. Large numbers of same size spheres are triboelectrically charged through rubbing on the substrate plate. Therefore, one can observe the two-dimensional system without the help of any instrument and...
