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Melting of Colloidal Crystal Films

Authors Peng, Y.
Wang, Z.
Alsayed, A. M.
Yodh, A. G.
Han, Y.
Issue Date 2010
Source Physical Review Letters , v. 104, (20), 2010, MAY 21, article number 205703
Summary We study melting mechanisms in single and polycrystalline colloidal films composed of diameter-tunable microgel spheres with short-ranged repulsive interactions and confined between two glass walls. Thick films (>4 layers), thin-films (<= 4 layers), and monolayers exhibit different melting behaviors. Thick films melt from grain boundaries in polycrystalline solid films and from film-wall interfaces in single-crystal films; a liquid-solid coexistence regime is observed in thick films but vanishes at a critical thickness of 4 layers. Thin solid films (2 to 4 layers) melt into the liquid phase in one step from both grain boundaries and from within crystalline domains. Monolayers melt in two steps with a middle hexatic phase. © 2010 The American Physical Society.
ISSN 0031-9007
Rights Physical Review Letters © copyright (2010) American Physical Society. The Journal's web site is located at
Language English
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