Fig. 1: Nanoribbon synthesis from molecularly derived seeds.
From: Graphene nanoribbons initiated from molecularly derived seeds
a Schematic diagram of the two main stages. (i) PAH molecules (red = oxygen and purple = carbon) are deposited at relatively low temperature onto Ge(001) (gray) from the vapor phase to form seeds. (ii) CH4 (light blue = carbon and white = hydrogen) is used to drive anisotropic growth via CVD and extend the seeds selectively along one direction, at high temperature, to yield narrow, armchair graphene nanoribbons. b Representative SEM image of nanoribbons initiated from PTCDA-derived seeds after 173 min of CH4 exposure. Scale bar is 200 nm.
