Direct growth of nanographene on glass and postdeposition size control

Nanograpehene with an in-plane crystal size of $∼15nm$ was directly deposited on glass at $750°C$ by thermal chemical deposition, without using any additional metallic catalyst. Annealing of nanographene film at 300 to $500°C$ leads to an increase in the in-plane crystal size up to $∼23nm$⁠, when the annealing is done in the presence of an adlayer of nickel, subsequently deposited on the graphene after the initial deposition. This study clearly shows that nanographene can be directly deposited on glass and the crystallite size is controllable.