Journal Article

PreJuSER-56160

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Steric Repulsion by Adsorbed Polymer Layers Studied with Total Internal Reflection Microscopy

Kleshchanok, D.FZJ* ; Lang, P. R.FZJ*

2007
ACS Publ. Washington, DC

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Please use a persistent id in citations: http://hdl.handle.net/2128/2606  doi:10.1021/la062607k

Abstract: Total internal reflection microscopy (TIRM) was applied to measure the interaction potential between charge-stabilized polystyrene latex spheres and a glass wall in dependence on the concentration of additional poly(ethylene oxide). The influence of the polymer can be described by steric repulsion between polymer layers, which are physically adsorbed onto the surfaces of the polystyrene sphere and the glass wall. The expected attractive contribution to the potential due to polymer depletion was not observed. An increase of the polymer bulk concentration is shown to strengthen the steric repulsion. At the highest polymer concentrations studied, it is possible to accurately describe the experimental data for the steric contribution to the total interaction potential with the Alexander-de Gennes model for brush repulsion.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Weiche Materie (IFF-7)

Research Program(s):

1. Kondensierte Materie (P54)

Appears in the scientific report 2007
Notes: This version is available at http://dx.doi.org/10.1021/la062607k Copyright © The American Chemical Society

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