Fig. 6From: Nanosheet composed of gold nanoparticle/graphene/epoxy resin based on ultrasonic fabrication for flexible dopamine biosensor using surface-enhanced Raman spectroscopyImages contact angles of water with neat EPR (a), GNS/EPR1 (b), GNS/EPR2 (c), GNS/EPR4 (d), GNS/EPR5 (e) and Au NPs/GNS/EPR5 (f)Back to article page