Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jcis.2012.04.076
Title: An improved convective self-assembly method for the fabrication of binary colloidal crystals and inverse structures
Authors: Cai, Z.
Teng, J.
Wan, Y.
Zhao, X.S. 
Keywords: Binary colloidal crystals
Binary inverse opals
Convective self-assembly
Crack-free
Macroporous
Issue Date: 15-Aug-2012
Citation: Cai, Z., Teng, J., Wan, Y., Zhao, X.S. (2012-08-15). 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. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jcis.2012.04.076
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). © 2012 Elsevier Inc.
Source Title: Journal of Colloid and Interface Science
URI: http://scholarbank.nus.edu.sg/handle/10635/88533
ISSN: 00219797
DOI: 10.1016/j.jcis.2012.04.076
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