# Chemically Induced Transformation of CVD-Grown Bilayer Graphene into Single Layer Diamond

## TL;DR

This study provides experimental evidence that fluorination of CVD-grown bilayer graphene induces a phase transition into a single-layer diamond-like structure, confirmed through multiple spectroscopic and microscopic techniques.

## Contribution

The paper demonstrates the first comprehensive experimental proof of converting bilayer graphene into a diamond monolayer via fluorination, supported by extensive spectroscopic and computational analysis.

## Key findings

- Fluorination induces interlayer C-C bond formation.
- Transition from bilayer graphene to diamond monolayer confirmed.
- Multiple spectroscopic techniques verify the phase change.

## Abstract

Notwithstanding numerous density functional studies on the chemically induced transformation of multilayer graphene into a diamond-like film, a comprehensive convincing experimental proof of such a conversion is still lacking. We show that the fluorination of graphene sheets in Bernal (AB)-stacked bilayer graphene (AB-BLG) grown by chemical vapor deposition on a single crystal CuNi(111) surface triggers the formation of interlayer carbon-carbon bonds, resulting in a fluorinated diamond monolayer (F-diamane). Induced by fluorine chemisorption, the phase transition from AB-BLG to single layer diamond was studied and verified by X-ray photoelectron, ultraviolet photoelectron, Raman, UV-Vis, electron energy loss spectroscopies, transmission electron microscopy, and DFT calculations.

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Source: https://tomesphere.com/paper/1901.02131