Volume 71, Number 5, September 2005
|Page(s)||838 - 844|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||03 August 2005|
Elementary triangles in a 2D binary colloidal glass former
University of Konstanz, Department of Physics - 78457 Konstanz, Germany and Johannes-Gutenberg University of Mainz, Institute of Physics 55099 Mainz, Germany
Accepted: 4 July 2005
Particle positions of a two-dimensional (2D) binary colloidal glass former were measured video-microscopically. Local density-optimized structures of triangles of nearest-neighboring particles (TNNP) were found from the shortest pair-distances. These are referred to as elementary triangles (ET) —exactly one for each 3-particle combination of the two kinds of colloids. Clustering of ET-like TNNP implies larger distances between two particles, which generate the near-zone maxima in the pair-distribution functions. Tiling mismatches of different kinds of ET create structural frustrations. Increasing combination possibilities for the tiling of the different ET lead to the loss of long-range order for larger pair-distances. All features of the pair-distribution functions are qualitatively described.
PACS: 82.70.Dd – Colloids / 64.70.Pf – Glass transitions / 61.20.Gy – Theory and models of liquid structure
© EDP Sciences, 2005
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