Effect of grain boundaries in Cu foil on CVD growth of graphene. (8th June 2017)

• Record Type: Journal Article
• Authors: Taira, Takanobu; Obata, Seiji; Saiki, Koichiro
• Is Part Of: Applied physics express. Volume 10:Number 7(2017)
• Publication Date: 2017-06-08
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/APEX.10.075503
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: The effect of the grain boundaries (GBs) in a Cu foil on the CVD growth of graphene was investigated via radiation-mode optical microscopy, which we developed for the real-time observation of growing graphene domains. Although the GBs had the typical width and depth of a few micrometers and hundred nanometers, respectively, they had little effect on the nucleation and the lateral growth of the graphene domains. However, increasing the growth time caused the diffusion of C atoms from the inside of the Cu foil, which was likely to result in additive nucleation and the enhancement of the growth speed at the GBs.