Figure 2From: The enhanced anticoagulation for graphene induced by COOH+ ion implantation SEM and CA images of pristine graphene and COOH + /graphene. (a) Pristine graphene, (b) COOH+/graphene with 1 × 1017 ions/cm2, (c) COOH+/graphene with 5 × 1017 ions/cm2, and (d) COOH+/graphene with 1 × 1018 ions/cm2.Back to article page