Question

Why is the quality of exfoliated graphene (by tape) the highest compared with graphene prepared by other methods?

Because the exfoliated graphene has the largest area compared to other methods. Because the parent material, namely graphite used in the exfoliation, has high quality. Because the exfoliation method intruduces miminum damage to the cristal lattice. Because the exfoliated graphene has a hexagonal lattice, while other graphene has not.