Mobility and elasticity of self-assembled membranes

Molecular dynamics simulations are used in order to study the self-assembly process and the physical properties of flexible membranes composed of amph iphilic molecules. On molecular scales, these membranes are observed to be rather mobile and to have rough surfaces arising from molecular protrusions , i.e., from the relative displacements of individual molecules. On length scales that are only somewhat larger than the membrane thickness, on the ot her hand, the membranes are found to undergo smooth bending undulations. In this way, our study provides the first explicit connection between compute r simulations with molecular resolution and elastic membrane models based o n differential geometry. [S0031-9007(98)08125-3].