In a typical procedure for chemical conversion of graphite oxide to graphene, the resulting
homogeneous dispersion (5.0 ml) was mixed with 5.0 ml of water, 5.0 ml of hydrazine solution (35
wt% in water, Aldrich) and 35.0 ml of ammonia solution (28 wt% in water, Crown Scientific) in a 20-
ml glass vial.