Random sequential adsorption of partially ordered discorectangles onto a continuous plane

TL;DR

This study uses computer simulations to analyze how partially ordered discorectangles pack onto a plane, revealing how anisotropy and partial alignment influence packing density and structure at the jamming state.

Contribution

It introduces a comprehensive simulation analysis of anisotropic discorectangle adsorption, highlighting the effects of partial ordering on packing density and structure.

Findings

Partial ordering increases packing density at jamming.

Orientation preferences shift the density versus aspect ratio relationship.

Structural analysis reveals connectivity patterns in the jammed state.

Abstract

Computer simulation was used to study the random sequential adsorption of identical discorectangles onto a continuous plane . The problem was analyzed for a wide range of discorectangle aspect ratios ($\varepsilon \in [1;100]$). We studied anisotropic deposition, i.e., the orientations of the deposited particles were uniformly distributed within some interval such that the particles were preferentially aligned along a given direction. The kinetics of the changes in the packing density $\varphi$ found at different values of $S_0$ are discussed. Partial ordering of the discorectangles significantly affected the packing density at the jamming state, $\varphi_\text{j}$, and shifted the cusps in the $\varphi_\text{j}(\varepsilon)$ dependencies. The structure of the jammed state was analyzed using the adsorption of disks of different diameters into the porous space between the deposited discorectangles. The analysis of the connectivity between the discorectangles was performed assuming a core---shell structure of particles.