Journal
PHYSICS LETTERS A
Volume 373, Issue 35, Pages 3174-3181Publisher
ELSEVIER
DOI: 10.1016/j.physleta.2009.06.050
Keywords
Structures transitions; Colloidal crystals; Self-assembly; Band structures
Categories
Funding
- National Natural Science Foundation of China [10334020, 10574027, 10604014, 10874025]
- Shanghai Education Committee [06PJ14006]
- Shanghai Education Development Foundation [05SG01]
- CNKBRSF [2006CB921706]
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The self-assembled colloidal crystals with structure transitions were realized experimentally on substrates with polymer brushes. Such polymer-mediated colloidal crystals were found to experience a series of in-layer structure transitions including stable columnar, polycrystalline, mixed square-hexagonal, square, hexagonal structures when the mass ratio of colloidal particles to free polymers was adjusted from 0.125 to 10. Among these structures, a large area interfacial square structure was proved to be a body-centered tetragonal (BCT) structure in three dimensions in the polymer-mediated colloidal crystals. (C) 2009 Elsevier B.V. All rights reserved.
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