The use of sample positioning to control defect creation by oxygen plasma in isotopically labelled bilayer graphene membranes.

ABSTRACT: Monolayer and isotopically labelled bilayer graphene membranes were prepared on grids for transmission electron microscopy (TEM). In order to create defects in the graphene layers in a controlled way, we studied the sensitivity of the individual graphene layers to the oxygen plasma treatment. We tested samples with different configurations by varying the order of the transfer of layers and changing the orientation of the samples with respect to the plasma chamber. Using Raman spectroscopy, HRTEM and X-ray photoelectron spectroscopy, we demonstrated defect formation and determined the quantity and chemical composition of the defects. By keeping the sample structure and the setup of the experiment unchanged, the significant role of the sample orientation with respect to the chamber was demon

SUBMITTER: Guerra VLP 

PROVIDER: S-EPMC8695737 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature