Conformational Properties of a Back-Folding Wormlike Chain Confined in a Cylindrical Tube.

Abstract

When a semiflexible chain is confined in a narrow cylindrical tube, the formation of a polymer hairpin is a geometrical conformation that accompanies an exponentially large local free energy and, hence, is a relatively rare event. Numerical solutions of the hairpin distribution functions for persistence-length-to-tube-radius ratios over a wide range are obtained in high precision, by using the Green's function approach for the wormlike-chain model. The crossover region between the narrow and moderately narrow tubes is critically investigated in terms of the hairpin free energy, global persistence length, mean hairpin-tip distance from the tube axis, and hairpin-plane orientational properties. Accurate representations of the solutions by simple interpolation formulae are suggested.

DOI: 10.1103/PhysRevLett.118.247802

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Cite this paper

@article{Chen2017ConformationalPO, title={Conformational Properties of a Back-Folding Wormlike Chain Confined in a Cylindrical Tube.}, author={Jeff Z. Y. Chen}, journal={Physical review letters}, year={2017}, volume={118 24}, pages={247802} }