Eur. Phys. J. E (2007) 24: 19-26
https://doi.org/10.1140/epje/i2007-10206-4

Regular Article

Simulation study of random sequential adsorption of mixtures on a triangular lattice

¹ Faculty of Engineering, Trg D. Obradovića 6, 21000, Novi Sad, Serbia
² Institute of Physics, P.O. Box 68, Zemun 11080, Belgrade, Serbia

^* e-mail: vrhovac@phy.bg.ac.yu;

Received: 12 June 2007
Accepted: 9 July 2007
Published online: 3 September 2007

Abstract

Random sequential adsorption of binary mixtures of extended objects on a two-dimensional triangular lattice is studied numerically by means of Monte Carlo simulations. The depositing objects are formed by self-avoiding random walks on the lattice. We concentrate here on the influence of the symmetry properties of the shapes on the kinetics of the deposition processes in two-component mixtures. Approach to the jamming limit in the case of mixtures is found to be exponential, of the form: θ(t) ∼ θ_jam - Δθ  exp(- t/σ), and the values of the parameter σ are determined by the order of symmetry of the less symmetric object in the mixture. Depending on the local geometry of the objects making the mixture, jamming coverage of a mixture can be either greater than both single-component jamming coverages or it can be in between these values. Results of the simulations for various fractional concentrations of the objects in the mixture are also presented.