Competitive random sequential adsorption of binary mixtures of disks and discorectangles

Abstract

The two-dimensional (2D) packings of binary mixtures of disks with diameter $d$ and discorectangles with aspect ratio $\varepsilon$ (length-to-width ratio $\varepsilon=l/d$) were studied numerically. The competitive random sequential adsorption (RSA) with simultaneous deposition of particles was considered. The aspect ratio was changed within the range $\varepsilon=1-10$. In the competitive model, the particle was selected with probability $p_d$ (disks) and $p_\varepsilon = 1- p_d$ (discorectangles), and then they were placed sequentially on a solid surface without overlapping with previously placed particles. Behavior of the total coverage in jamming state $\varphi_T$ at different values of $p_d$ and $\varepsilon$ was analyzed. For core-shell structure of the particles the percolation connectivity of films was also discussed.