# Preparation of graphene bilayers on platinum by sequential chemical vapour deposition

## TL;DR

This paper presents a cost-effective, flexible method for growing bilayer graphene on platinum using sequential chemical vapour deposition, involving thermal decomposition, platinum film deposition, and annealing to achieve bilayer stacking.

## Contribution

It introduces a novel sequential CVD process for epitaxial bilayer graphene growth on platinum, enabling large-area bilayer formation with detailed microscopic analysis.

## Key findings

- Successful growth of bilayer graphene confirmed by microscopy
- Moiré patterns explained by stacking arrangements
- Method is scalable and cost-effective

## Abstract

A cheap and flexible method is introduced that enables the epitaxial growth of bilayer graphene on Pt(111) by sequential chemical vapour deposition. Extended regions of two stacked graphene sheets are obtained by, first, the thermal decomposition of ethylene and the subsequent formation of graphene. In the second step, a sufficiently thick Pt film buries the first graphene layer and acts as a platform for the fabrication of the second graphene layer in the third step. A final annealing process then leads to the diffusion of the first graphene sheet to the surface until the bilayer stacking with the second sheet is accomplished. Scanning tunnelling microscopy unravels the successful growth of bilayer graphene and elucidates the origin of moir\'e patterns.