Scaling aspects of block co-polymer adsorption on curved surfaces from nonselective solvents.

The Journal of Physical Chemistry. B
Eli HershkovitsRina Tannenbaum

Abstract

In this paper, we have developed a geometric-based scaling model that describes the adsorption of diblock copolymer chains from good solvents and theta-solvents onto reactive surfaces of varying curvatures. To evaluate the impact of particle size on the adsorption process, we probed the adsorption of poly(styrene-b-methymethacrylate) (PS-PMMA) diblock copolymers from solvents with different degrees of selectivity on aluminum oxide (Al(2)O(3)) surfaces belonging to particles of different sizes. When the adsorbed PMMA layer is dense enough (in the case of a theta-solvent for the PMMA block), our results show good correlation between the theory and experimental results, pointing to the formation of a PMMA adsorption layer and a brushlike PS layer. Conversely, when adsorption occurs from a nonpreferential solvent, particularly on particles with high curvature, the PMMA adsorption layer at the surface becomes less dense and the grafted PS moiety exhibits a transitional morphology consisting of several layers of increasingly sparsely spaced blobs.

References

Jun 23, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·R TannenbaumL Potts
Aug 27, 2005·The Journal of Chemical Physics·A StrioloC K Hall
Jan 25, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Megha SurveVenkat Ganesan

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Citations

May 7, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Grady NunneryRina Tannenbaum
Oct 9, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Jianli ChengAlexander V Neimark
Sep 27, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Grady A NunneryRina Tannenbaum
Jun 14, 2018·Proceedings of the National Academy of Sciences of the United States of America·Trung Dac NguyenMonica Olvera de la Cruz

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