Size Control of Nanographene Directly Grown On Glass

We directly deposited very thin carbon film was on glass by thermal chemical deposition at 750 $^{\circ}$C without using any catalyst. The directly deposited carbon film consists of nanographene with an in-plane crystal size of $\sim $ 15 nm. The in-plane crystal size of nanographene increased up to 23 nm by annealing of the post-deposited nickel film on the nanographene film at 300 $^{\circ}$C to 500 $^{\circ}$C. This study suggests that nanographene can be directly deposited on glass at low temperature and that the crystalline size can be controlled.