Growth of a dense polymer brush layer from solution

Himmelhaus, M.; Bastuck, T.; Tokumitsu, S.; Grunze, Michael; Livadaru, L.; Kreuzer, H. J.

doi:10.1209/epl/i2003-00205-7

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Growth of a dense polymer brush layer from solution

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Grunze, Michael
Cellular Biophysics, Max Planck Institute for Medical Research, Max Planck Society;

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Himmelhaus, M., Bastuck, T., Tokumitsu, S., Grunze, M., Livadaru, L., & Kreuzer, H. J. (2003). Growth of a dense polymer brush layer from solution. europhysics letters, 64(3), 378-384. doi:10.1209/epl/i2003-00205-7.

Cite as: https://hdl.handle.net/21.11116/0000-0001-D61E-D

Abstract

The chemical grafting of alkanethiol-terminated poly(ethylene glycol) to a gold substrate from dimethylformamide solution was monitored by in situ ellipsometry for several molar concentrations. In the initial stage a layer of mushroom-like moieties forms and, on a much longer time scale, is followed by conformational conversion (and further adsorption) to a dense brush of stretched polymers. A statistical mechanical theory is presented that allows for a nonuniform grafting density and conformational conversion. It accounts fully for all observed details.