Year: 2013
Type: article
Abstract: We have determined the equilibrium shape of graphene domains grown on Ni(111) via carbon segregation at 925${\phantom{\rule{0.16em}{0ex}}}^{\ensuremath{\circ}}$C. In situ, spatially resolved electron diffraction measurements were used to determine the crystallographic orientation of the edges of the graphene domains. In contrast to recent theoretical predictions of a nearly circular shape, we show that graphene domains, which nucleate with random shapes, all evolve toward a triangular equilibrium shape with ``zigzag'' edges. Only one of the two possible zigzag edge orientations is observed.
Source: Physical Review B
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Funder: National Science Foundation
OpenAlex ID: W2964130573