Issue 45, 2022

Decoupling of CVD-grown epitaxial graphene using NaCl intercalation

Abstract

The structural and electronic properties of graphene grown on catalytic metal surfaces are significantly modified via graphene-substrate interaction. To minimize the influence of the metal substrate, a dielectric buffer layer can be introduced between the graphene and metal substrate. However, the catalytic synthesis of graphene limits the potential alternatives for buffer layers. The intercalation of atoms below the graphene layer is a promising method that does not require the chemical treatment of graphene or the substrate. In this study, the electronic and structural properties of single-layer graphene (SLG) on the Cu(111) substrate intercalated with ultrathin NaCl thin films were investigated using scanning tunnelling microscopy. The intercalation of the NaCl monolayer decoupled SLG from the metal substrate, thereby producing quasi-freestanding graphene.

Graphical abstract: Decoupling of CVD-grown epitaxial graphene using NaCl intercalation

Supplementary files

Article information

Article type
Paper
Submitted
12 Okt 2022
Accepted
02 Nov 2022
First published
03 Nov 2022

Nanoscale, 2022,14, 16929-16935

Decoupling of CVD-grown epitaxial graphene using NaCl intercalation

Y. Kim, H. Han, D. Luo, R. S. Ruoff and H. Shin, Nanoscale, 2022, 14, 16929 DOI: 10.1039/D2NR05660G

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