Spacing between graphene and metal substrates studied with total-reflection high-energy positron diffraction. (July 2016)

• Record Type: Journal Article
• Authors: Fukaya, Yuki; Entani, Shiro; Sakai, Seiji; Mochizuki, Izumi; Wada, Ken; Hyodo, Toshio; Shamoto, Shin-ichi
• Is Part Of: Carbon. Volume 103(2016)
• Page Start: 1
• Page End: 4
• Publication Date: 2016-07
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2016.03.006
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: The spacing between graphene and metal substrates has been investigated using total-reflection high-energy positron diffraction (TRHEPD). The rocking curve analysis performed, based on the dynamical diffraction theory, shows that the spacing between the graphene layer and a substrate of Cu(111) and that between graphene and a Co(0001) substrate are 3.34 Å and 2.06 Å, respectively. The former is close to the interlayer spacing in graphite, suggesting a weak interaction with the substrate material, whereas the latter value experimentally verifies that, in the case of graphene on Co(0001), there is a strong interaction with the substrate.