Please use this identifier to cite or link to this item:
Title: Fabrication of a two-dimensional periodic non-close-packed array of polystyrene particles
Authors: Tan, B.J.-Y.
Sow, C.-H. 
Lim, K.-Y.
Cheong, F.-C. 
Chong, G.-L. 
Wee, A.T.-S. 
Ong, C.-K. 
Issue Date: 2-Dec-2004
Citation: Tan, B.J.-Y., Sow, C.-H., Lim, K.-Y., Cheong, F.-C., Chong, G.-L., Wee, A.T.-S., Ong, C.-K. (2004-12-02). Fabrication of a two-dimensional periodic non-close-packed array of polystyrene particles. Journal of Physical Chemistry B 108 (48) : 18575-18579. ScholarBank@NUS Repository.
Abstract: We report a simple technique for the fabrication of a two-dimensional periodic non-close-packed array of nonspherical particles. The technique exploits the self-assembly of uniformly sized colloidal microspheres on the surface of a Si substrate followed by reactive ion etching (RIE) that converts the spheres into nonspherical particles. Single and double layers of packed colloidal polystyrene microspheres of uniform size (diameter 1.2 μm) were spin-coated onto cleaned Si substrates. The samples were then exposed to reactive ions in an RIE unit operating under a mixture of CF 4 and O 2 gases. Due to preferential etching in the direction normal to the surface of the substrate, the microspheres were reduced to a nonspherical form resembling a biconvex microlens. Moreover, the periodic nature of the previously packed layer was preserved during the etching process. As a result, we obtained two-dimensional periodic non-close-packed arrays of nonspherical particles. In this work, we report the systematic dependence of the dimensions of the polystyrene particles on the duration of the exposure to RIE. In addition, the resultant patterned Si substrates were further utilized as templates for directed assembly of unique arrangements of microspheres with different diameters.
Source Title: Journal of Physical Chemistry B
ISSN: 15206106
DOI: 10.1021/jp0475741
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Apr 19, 2021


checked on Apr 12, 2021

Page view(s)

checked on Apr 11, 2021

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.