Fluctuation-induced attraction between adhesion sites of supported membranes.
We use scaling arguments and coarse-grained Monte Carlo simulations to study the fluctuation-mediated interactions between a pair of adhesion sites of a bilayer membrane and a supporting surface. We find that the potential of mean force is an infinitely long range attractive potential that grows logarithmically with the pair distance r : ϕ(r)/k B T=c ln r, where the constant c=2 and c=1 for nonstressed and stressed membranes, respectively. When, in addition to excluded volume repulsion, the membrane also interacts with the underlying surface through a height-dependent attractive potential, the potential ϕ(r) is screened at large pair distances.
Farago
Oded
O
Department of Biomedical Engineering, Ben Gurion University, Be'er Sheva 84105, Israel.
D000465:Algorithms; D001703:Biophysics / Q000379:methods*; D003198:Computer Simulation; D007700:Kinetics; D008024:Ligands; D008051:Lipid Bilayers / Q000737:chemistry*; D008567:Membranes, Artificial; D015233:Models, Statistical; D009010:Monte Carlo Method; D011506:Proteins / Q000737:chemistry*; D055672:Static Electricity; D013269:Stochastic Processes
D008024:Ligands; D008051:Lipid Bilayers; D008567:Membranes, Artificial; D011506:Proteins