Self-assembly of crack-free silica colloidal crystals on patterned silicon substrates

Cai, Zhongyu, Teng, Jinghua, Xia, Deying and Zhao, X. S. (2011) Self-assembly of crack-free silica colloidal crystals on patterned silicon substrates. Journal of Physical Chemistry C, 115 20: 9970-9976. doi:10.1021/jp201674x


Author Cai, Zhongyu
Teng, Jinghua
Xia, Deying
Zhao, X. S.
Title Self-assembly of crack-free silica colloidal crystals on patterned silicon substrates
Journal name Journal of Physical Chemistry C   Check publisher's open access policy
ISSN 1932-7447
1932-7455
Publication date 2011-05
Sub-type Article (original research)
DOI 10.1021/jp201674x
Volume 115
Issue 20
Start page 9970
End page 9976
Total pages 7
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2012
Language eng
Formatted abstract
Face-centered cubic (fcc) (111)-orientated twodimensional (2D) and three-dimensional (3D) crack-free silica colloidal crystals (CCs) were fabricated on patterned silicon substrates via a vertical deposition method. The influence of the surface properties of the substrate and the concentration of colloidal microspheres on the self-assembly were studied. The results showed that monolayer of silica microspheres selfassembled on a hydrophobic substrate surface while on a hydrophilic surface multilayer of silica microspheres formed under otherwise the same experimental conditions. The number of CC layers grown on the patterned substrate was proportional to the volume fraction of the colloidal microspheres. The optical properties of the samples were less influenced by the patterned surface with increasing the volume fraction of the colloidal suspension when the patterned substrates were fully covered by the CCs. The results presented in this paper reveal that the vertical deposition method can allow the formation of crack-free and well-ordered 3D CCs in large domains on patterned surfaces
Keyword Well-Defined Sizes
Photonic Crystals
Spherical Colloids
Surfaces
Crystallization
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ
Additional Notes Published: May 03, 2011

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Non HERDC
 
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