# Growth of two-dimensional Au patches in graphene pores: a density-functional study

## TL;DR

This study uses density-functional theory to show that gold atoms can easily diffuse and form two-dimensional patches within graphene pores, suggesting a feasible pathway for experimental fabrication of 2D gold structures.

## Contribution

The paper provides a detailed theoretical analysis of gold atom diffusion in graphene pores, highlighting the ease of growth of 2D gold patches at room temperature, which is a novel insight.

## Key findings

- Gold atoms diffuse readily on graphene and 2D gold with barriers less than 0.5 eV.
- Gold atoms move without barriers across the interface between graphene and 2D gold.
- Diffusion barriers are absent at the interface, facilitating gold patch growth.

## Abstract

Inspired by recent studies of various two-dimensional (2D) metals such as Au, Fe and Ag, we study the growth of two-dimensional gold patches in graphene pores by density-functional theory. We find that at room temperature gold atoms diffuse readily on top of both graphene and two-dimensional gold with energy barriers less than $0.5$ eV. Furthermore, gold atoms move without barriers from the top of graphene to its edge and from the top of 2D gold to its edge. The energy barriers are absent even at the interface of 2D gold and graphene, so that the gold atoms move effortlessly across the interface. We hope our demonstration for the propensity of diffusing gold atoms to grow 2D gold patches in graphene pores will inspire the fabrication of these patches experimentally.