We consider the continuum limit of a recently introduced model for discretized thick polymers, or tubes. We address both analytically and numerically how the polymer thickness influences the decay of tangent-tangent correlations and find how the persistence length scales with the thickness and the torsional rigidity of the tube centreline. At variance with the worm-like chain model, the phase diagram that we obtain for a continuous tube is richer; in particular, for a given polymer thickness there exists a threshold value for the centreline torsional rigidity separating a simple exponential decay of the tangent-tangent correlation from an oscillatory one.
Continuum model for polymers with finite thickness / Marenduzzo, D.; Micheletti, Cristian; Seyed allaei, H.; Trovato, A.; Maritan, A.. - In: JOURNAL OF PHYSICS. A, MATHEMATICAL AND GENERAL. - ISSN 0305-4470. - 38:17(2005), pp. L277-L283. [10.1088/0305-4470/38/17/L01]
Continuum model for polymers with finite thickness
Micheletti, Cristian;
2005-01-01
Abstract
We consider the continuum limit of a recently introduced model for discretized thick polymers, or tubes. We address both analytically and numerically how the polymer thickness influences the decay of tangent-tangent correlations and find how the persistence length scales with the thickness and the torsional rigidity of the tube centreline. At variance with the worm-like chain model, the phase diagram that we obtain for a continuous tube is richer; in particular, for a given polymer thickness there exists a threshold value for the centreline torsional rigidity separating a simple exponential decay of the tangent-tangent correlation from an oscillatory one.File | Dimensione | Formato | |
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