In-situ observation of graphene using an optical microscope

Abstract

In-situ observation of graphene by using visible light was very few. Herein, we investigate the feasibility of in-situ observation of graphene decomposition by using the optical microscope (OM) equipped with a heating vacuum stage. In this work, in addition to in-situ observation, we investigated the behavior of CVD-grown graphene on metal (Ni and Cu) surfaces using in-situ Raman spectroscopy and X-ray photoelectron spectroscopy to understand the surface changes observed in the OM images. Observations were also made in vacuum and argon hydrogen gas flow conditions. As a result of the observation, it was possible to observe the decomposition of graphene using visible light at high temperatures. We expect it to be an easy way to observe graphene under various atmospheric conditions.