Fig. 5: Charge density analysis of ONC-S and NC-G.

ELF maps for optimized geometries of (a) graphene, (b) NC with N-5 model, and (c) ONC with N-5 model; charge density differences of sodium atoms adsorbed on (d) graphene, (e) NC with N-5 model, and (f) ONC with N-5 model, and corresponding two-dimensional maps.