Modelling of interacting dimer adsorption

TL;DR

This paper models dimer adsorption using a random sequential algorithm considering electrostatic interactions, analyzing monolayer properties, adsorption kinetics, and comparing simulations with experimental insulin dimer data.

Contribution

It introduces a detailed analysis of adsorption kinetics with a new numerical method and explores the effects of interaction range on monolayer properties.

Findings

Adsorption kinetics follow Feder's law under certain conditions.

Interaction range significantly affects monolayer structure.

Numerical simulations align well with experimental insulin dimer data.

Abstract

Adsorption of dimers is modelled using random sequential adsorption algorithm. The interaction between molecules is given by screened electrostatic potential. The paper focuses on the properties of adsorbed monolayers as well as the dependence of adsorption kinetics on interaction range. We designate random maximal coverage ratios, density autocorrelations and orientational ordering inside layers. Moreover the detailed analysis of adsorption kinetics is presented including a discussion of Feder's law validity and new numerical method for modelling diffusion driven adsorption. Results of numerical simulations are compared with experimental data obtained previously for insulin dimers.