期刊
MATERIALS LETTERS
卷 62, 期 27, 页码 4286-4289出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2008.07.004
关键词
colloidal crystal; polymers; self-assembly; elevated temperature; dip-drawing; microstructure
资金
- Key Natural Science Foundation of Tianjin [07JCZDJC00900]
The self-assembly of colloidal crystal arrays from polystyrene (PS) sphere emulsion at elevated temperature by dip-drawing method was investigated. The dependence of effective sphere transfer in the meniscus of emulsion on temperature was discussed. The results show that the assembled arrays formed at 50 degrees C have fewer defects than those at room temperature. The elevated emulsion temperature during the ordered arrangement of colloidal crystals causes quicker solvent evaporation, hence quicker sphere transfer. However, exceeding solvent flux and crystal growth induced by over high temperatures result in more fracture lines displayed in arrays. At 50 degrees C, the effective sphere transfer by the solvent flux to the array edge can also be enhanced by increasing the PS volume fraction of emulsion, which obviously reduces fracture lines on the surface of multilayer. (C) 2008 Elsevier B.V. All rights reserved.
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