Melting of Colloidal Crystal Films
Alsayed, A. M.
Yodh, A. G.
|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.|
|Rights||Physical Review Letters © copyright (2010) American Physical Society. The Journal's web site is located at http://prl.aps.org|
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