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 : 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  (ERA 2012 Listed)    (ERA 2010 Rank A)   Check publisher's open access policy
Publication date 2012-08
Sub-type Article
DOI 10.1016/j.jcis.2012.04.076
Volume number 380
ISSN 0021-9797; 1095-7103
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
Collections: School of Chemical Engineering Publications
Official 2013 Collection
 
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