# Kinetic Monte Carlo Modeling of the Spontaneous Deposition of Platinum on Au(111) Surfaces

## TL;DR

This paper uses simulations to study how platinum atoms spontaneously deposit on gold surfaces, revealing how island structures form and grow.

## Contribution

The study is the first to extensively analyze the relationship between island size, density, and spontaneous deposition.

## Key findings

- Pt deposition on Au(111) surfaces forms ramified 2D islands up to a coverage of θ=0.25.
- The mean island size and density depend strongly on the deposition rate.
- The results align with experimental observations of island morphology.

## Abstract

The spontaneous deposition of platinum (Pt) atoms on Au(111) surfaces is systematically investigated through kinetic Monte Carlo simulations within the Embedded Atom Model framework. The kinetic model aims to capture both stoichiometric, atomic-scale interactions and the more relevant processes that describe the kinetics of a physical problem. Various deposition rates are examined, encompassing a thorough exploration of Pt adsorption up to a coverage degree of θ=0.25. The resulting 2D islands exhibit a ramified structure, mirroring the experimental methodologies. For the first time, this study extensively analyzes the dependence of both the mean island size and island density on spontaneous deposition, thereby offering valuable insights into the intricate dynamics of the system.