An improved convective self-assembly method for the fabrication of binary colloidal crystals and inverse structures

Cai, Zhongyu, Teng, Jinghua, Wan, Yong and Zhao, X. S. (2012) An improved convective self-assembly method for the fabrication of binary colloidal crystals and inverse structures. Journal of Colloid and Interface Science, 380 1: 42-50.


Author Cai, Zhongyu
Teng, Jinghua
Wan, Yong
Zhao, X. S.
Title An improved convective self-assembly method for the fabrication of binary colloidal crystals and inverse structures
Journal name Journal of Colloid and Interface Science   Check publisher's open access policy
ISSN 0021-9797
1095-7103
Publication date 2012-08
Sub-type Article (original research)
DOI 10.1016/j.jcis.2012.04.076
Volume 380
Issue 1
Start page 42
End page 50
Total pages 9
Place of publication Maryland Heights, MO, United States
Publisher Academic Press
Collection year 2013
Language eng
Abstract We report an improved convective self-assembly method for the fabrication of highly ordered, crack-free binary colloidal crystals (BCCs) and the associated inverse structures in large domains at length scales of several centimeters. With this method, BCCs can be fabricated in a non-close packed pattern and binary inverse opal films can be obtained over a centimeter scale. The presence of tetraethyl orthosilicate (TEOS) sol in the self-assembly system was found to play a significant role in the resultant structures. The pseudostop band positions are adjustable via varying the number ratio of small to large polystyrene (PS) spheres. At a given TEOS-to-PS ratio, the binary inverse opal film thickness was controllable by varying the colloidal volume fraction with an upper thickness threshold (>16 layers).
Keyword Binary colloidal crystals
Binary inverse opals
Crack-free
Convective self-assembly
Macroporous
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 9 May 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2013 Collection
 
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