A MOLECULAR-DYNAMICS STUDY OF LARGE-SCALE REVERSIBLE AGGREGATION OF ANISOTROPIC PARTICLES

We report findings of 1000 ps molecular dynamics simulations of a bidimensional system of 4050 Lennard-Jones particles with electric dipoles, undergoing spinodal separation. This simple system is used to model the reversible aggregation of building blocks bearing specific and fixed adhesion sites at their surface. Aggregation regions so obtained resemble images of self-assembled biological structures. Statistical analyses of these regions evidence the interplay of thermodynamic instability and of interaction range between the attachment sites. They also illustrate some basic aspects of the morphogenesis of extended biomolecular/cellular structures, self-organized from initially homogeneous solutions.