title: On the growth mode of two-lobed curvilinear graphene domains at atmospheric pressure.
abstract: We demonstrate the chemical vapor deposition (CVD) growth of 2-lobed symmetrical curvilinear graphene domains specifically on Cu{100} surface orientations at atmospheric pressure. We utilize electron backscattered diffraction, scanning electron microscopy and Raman spectroscopy to determine an as-yet unexplored growth mode producing such a shape and demonstrate how its growth and morphology are dependent on the underlying Cu crystal structure especially in the high CH4:H2 regime. We show that both monolayer and bilayer curvilinear domains are grown on Cu{100} surfaces; furthermore, we show that characteristic atmospheric pressure CVD hexagonal domains are grown on all other Cu facets with an isotropic growth rate which is more rapid than that on Cu{100}. These findings indicate that the Cu-graphene complex is predominant mechanistically at atmospheric pressure, which is an important step towards tailoring graphene properties via substrate engineering.
authors.affiliation: Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, New Jersey 07030, USA.
authors.forename: Kitu
authors.initials: K
authors.lastname: Kumar
authors.forename: Eui-Hyeok
authors.initials: EH
authors.lastname: Yang