J. Phys. II France
Volume 6, Numéro 8, August 1996
Page(s) 1195 - 1206
DOI: 10.1051/jp2:1996124
J. Phys. II France 6 (1996) 1195-1206

Membrane Fluctuation and Polymer Adsorption

W. Sung and Eunkeu Oh

Department of Physics, Pohang University of Science and Technology, Pohang, 790-784, Korea

(Received 15 January 1996, revised 5 April 1996, accepted 18 April 1996)

We investigate adsorption behaviors and desorption transitions of a flexible but self-avoiding polymer on a fluctuating (undulating) membrane (or interface). Incorporating hard-wall repulsion with polymer-membrane attraction of finite range, we find that the membrane fluctuation gives rise to an effective repulsion and enhances unbinding (desorption) transtition of polymer, lowering the transition temperature. Employing hard square-well model as an example, we calculate the desorption transition temperature and the critical behaviors of polymer and membrane fluctuations. Our results are qualitatively different from those of Garel, Kadar and Orland (Europhys. Lett. 29 (1995) 303) who employed a contact attractive potential which allows the polymer to permeate the other side of the surface.

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