Please use this identifier to cite or link to this item: https://doi.org/10.1038/srep00617
Title: Effect of angstrom-scale surface roughness on the self-assembly of polystyrene-polydimethylsiloxane block copolymer
Authors: Kundu, S.
Ganesan, R.
Gaur, N.
Saifullah, M.S.M.
Hussain, H.
Yang, H. 
Bhatia, C.S. 
Issue Date: 2012
Source: Kundu, S.,Ganesan, R.,Gaur, N.,Saifullah, M.S.M.,Hussain, H.,Yang, H.,Bhatia, C.S. (2012). Effect of angstrom-scale surface roughness on the self-assembly of polystyrene-polydimethylsiloxane block copolymer. Scientific Reports 2 : -. ScholarBank@NUS Repository. https://doi.org/10.1038/srep00617
Abstract: Self-assembly of block copolymers has been identified as a potential candidate for high density fabrication of nanostructures. However, the factors affecting its reliability and reproducibility as a patterning technique on various kinds of surfaces are not well-established. Studies pertaining to block copolymer self-assembly have been confined to ultra-flat substrates without taking into consideration the effect of surface roughness. Here, we show that a slight change in the angstrom-scale roughness arising from the surface of a material creates a profound effect on the self-assembly of polystyrene- polydimethylsiloxane block copolymer. Its self-assembly was found to be dependent on both the root mean square roughness (R rms) of the surface and the type of solvent annealing system used. It was observed that surface with R rms < 5.0 ... showed self-assembly. Above this value, the kinetic hindrance posed by the surface roughness on the block copolymer leads to its conforming to the surface without observable phase separation.
Source Title: Scientific Reports
URI: http://scholarbank.nus.edu.sg/handle/10635/55739
ISSN: 20452322
DOI: 10.1038/srep00617
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