Influence of the Total Gas Flow at Different Reaction Times for CVD-Graphene Synthesis on Polycrystalline Nickel

Table 1

Percentage of each type of graphene and thickness values corresponding to the optimized graphene sample.

Images	Multilayer graphene (%)	Few-layer graphene (%)	Bilayer graphene (%)	Monolayer graphene (%)	Thickness value
1	0.21	12.62	9.04	78.13	792
2	0.97	18.08	11.22	69.73	710
3	0.36	8.40	7.46	83.88	847
4	0.28	13.76	9.75	76.21	773
5	0.11	8.93	7.59	83.36	842
6	0.05	5.15	5.42	89.38	899

(Synthesis conditions: 980°C, 1 min reaction time, CH₄/H₂ = 0.07 v/v, and 80 NmL (CH₄ + H₂)/min).