J. Phys. I France 3 (1993) 1741-1754
Molecular dynamics simulations of the structure of closed tethered membranesIrena B. Petsche1 and Gaxy S. Grest2
1 Exxon Engineering Technology Department, Exxon Research and Engineering Company, NJ 07932, Florham Park, U.S.A.
2 Corporate Research Science Laboratories, Exxon Research and Engineering Company, NJ 08801, Annandale, U.S.A.
(Received 5 February 1993, accepted in final form 13 April 1993)
The equilibrium structure of closed self-avoiding tethered vesicles are investigated by molecular dynamics simulations. To allow for local flexibility, the vesicles are constructed by connecting lineax chains of n monomers to form a closed membrane. For all n studied, , we find that the membranes remain flat. The height fluctuations , where = 0.55 0.02 and N is the total number of monomers in the vesicle. This result for is significantly lower than earlier estimates for open membranes with a free perimeter but is in agreement with recent estimates of Abraham for membranes without a free perimeter. Results for the static structure factor, S(q), are calculated and compared to recent data on red blood cell skeletons.
© Les Editions de Physique 1993