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Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/6619
Title: Melting of colloidal crystal films
Authors: Peng, Yi
Wang, Ziren
Alsayed, Ahmed M.
Yodh, Arjun G.
Han, Yilong
Keywords: Colloidal crystal films
Melting mechanism
Issue Date: 21-May-2010
Citation: Physical review letters, v. 104, iss. 20, 205703, 21 May, 2010
Abstract: 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.
Rights: Physical Review Letters © copyright (2010) American Physical Society. The Journal's web site is located at http://prl.aps.org
URI: http://hdl.handle.net/1783.1/6619
Appears in Collections:PHYS Journal/Magazine Articles

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