Drift and diffusion of a confined semiflexible chain |
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Authors: | G Nam A Johner and N -K Lee |
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Institution: | (1) Division of Engineering, Brown University, 182 Hope Street, Providence, RI 02912, USA |
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Abstract: | We study the transverse and longitudinal linear response function of rigid chains subjected to an external force. Our main
concern are stiff polymers confined in narrow pores with diameter less than their persistence length. We explicitly consider
confinement in a transverse harmonic potential and generalize results by scaling arguments. Our results describe the drift
of the filament under an external force, time evolution of the filament shape, and filament diffusion. Diffusion of a confined
filament resembles the celebrated reptation process for flexible chains, albeit with distinct kinetic exponents. The limiting
case of stiff free filaments is also mentioned. |
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Keywords: | |
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