Painleve condensation, counter-ion condensation and Coulombic elasticity of biopolymers

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• Prof Emmanuel Trizac (Laboratoire de Physique Théorique et Modèles Statistiques, Université Paris-Sud, France)
• Friday 29 January 2010, 12:00-13:00
• Unilever Lecture Theatre, Department of Chemistry.

If you have a question about this talk, please contact Dr Mark Miller.

Onsager-Manning condensation is a manifestation of the long range character of the Coulombic potential in cylindrical geometry. This phenomenon is the cornerstone of our understanding of bio-polymers. Beyond a charge density threshold, counterions “condense” onto the charged polymer. With salt (added electrolyte), which is the experimentally relevant situation, the phenomenon is more complex and has received little attention. We will show that recent mathematical advances allow to obtain analytical results in a large range of salt content. We will in particular discuss the implications of this work for the Coulombic elasticity of bio-polymers through their persistence length.

This talk is part of the Extra Theoretical Chemistry Seminars series.

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