Figure 6. Mechanism of graphene enhancing plasmon-driven catalytic reaction.

(a,b) show the electric field distribution of a nanoparticle dimer with and without graphene, (c) is the structure of O₂ adsorbed on Ag cluster, (d) portrays the electron transfer from O₂ to Ag cluster on the triplet electronic excitation at 533 nm, (e) is the charge transfer upon the excitation of singlet oxygen at ground state to the triplet excited state, where the green and red stand for holes and electrons, respectively.