08 November 2013
Vol 342, Issue 6159

About The Cover

Cover image expansion

COVER Raman mapping images of carbon isotope–labeled graphene domains (lateral dimensions: 50 to 120 micrometers) created by exposing a copper surface to normal and isotope-labeled methane at preselected intervals. The data provide information about the effect of growth parameters on the domain shape and size and also contribute to the growth of centimeter-size single crystals of graphene that could enable applications such as nanoelectronics, photonics, and ultrastrong materials. See page 720. Image: Yufeng Hao