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|Title:||An improved convective self-assembly method for the fabrication of binary colloidal crystals and inverse structures|
|Keywords:||Binary colloidal crystals|
Binary inverse opals
|Source:||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|
|Appears in Collections:||Staff Publications|
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