Intermolecular adhesion in conducting polymers

Details Intermolecular adhesion in conducting polymers Intermolecular adhesion in conducting polymers

2004-04-05

arxiv.org/abs/cond-mat/0404114v1

Physics

Condensed Matter

Soft Condensed Matter

13 pages, 7 figures

Scientific paper

10.1103/PhysRevE.71.051802

We analyze the interaction of two conducting, charged polymer chains in solution using a minimal model for their electronic degrees of freedom. We show that a crossing of the two chains in which the polymers pass within Angstroms of each other leads to a decrease of the electronic energy of the combined system that is significantly larger than the thermal energy and thus promotes interchain aggregation. We consider the competition of this attractive interaction with the screened electrostatic repulsion and thereby propose a phase diagram for such polymers in solution; depending on the charge density and persistence length of the chains, the polymers may be unbound, bound in loose, braid-like structures, or tightly bound in a parallel configuration.

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