Sushko, ML and Shluger, AL (2007) DLVO theory for like-charged polyelectrolyte and surface interactions. In: MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS. (pp. 1090 - 1095). ELSEVIER SCIENCE BV
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The mechanism of adsorption of charged polymers onto like-charged surfaces has been a matter of debates in recent years. We propose a mean-field theory for the interactions of like-charged polyelectrolyte and a plane surface in the presence of 1:1 and 2:1 electrolyte, which takes into account long-range van der Waals and double-layer forces. The theory is able to predict the optimum conditions, such as solvent composition, pH and temperature, for polyelectrolyte adsorption on like-charged surfaces as well as to account for the conformational properties of a polymer at the surfaces. An excellent agreement of the predictions of the theory with the available experimental data suggests that it can be used as a simple tool for predicting the optimum conditions for studying various polyelectrolyte properties, including their biological activity, at the surfaces. Particularly simple expressions for the polymer/surface interaction energy have been obtained in the Debye-Huckel limit. The applicability of this approximation to the biological molecules at the surfaces is discussed. (c) 2006 Elsevier B.V. All rights reserved.
|Title:||DLVO theory for like-charged polyelectrolyte and surface interactions|
|Event:||Symposium on Current Trends in Nanoscience - From Materials to Applications held at the 2006 E-MRS Spring Meeting|
|Dates:||2006-05-29 - 2006-06-02|
|Keywords:||DNA, adsorption, charged surfaces, mean-field theory, FORCE MICROSCOPY, MICA SURFACES, DNA, MONOVALENT, ADSORPTION, SUBSTRATE, DYNAMICS, IONS, ROD|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Physics and Astronomy|
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