Chemistry below graphene: decoupling epitaxial graphene from metals by potential-controlled electrochemical oxidation.

ABSTRACT: While high-quality defect-free epitaxial graphene can be efficiently grown on metal substrates, strong interaction with the supporting metal quenches its outstanding properties. Thus, protocols to transfer graphene to insulating substrates are obligatory, and these often severely impair graphene properties by the introduction of structural or chemical defects. Here we describe a simple and easily scalable general methodology to structurally and electronically decouple epitaxial graphene from Pt(111) and Ir(111) metal surfaces. A multi-technique characterization combined with ab-initio calculations was employed to fully explain the different steps involved in the process. It was shown that, after a controlled electrochemical oxidation process, a single-atom thick metal-hydroxide laye

SUBMITTER: Palacio I 

PROVIDER: S-EPMC6120681 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature