Figure 4From: Origin of defect-related green emission from ZnO nanoparticles: effect of surface modificationMeasured zeta potential of ZnO nanoparticles from (a) the regular solvent OD; (b) the mixture of TOA and OD in 1:10 molar ratio; (c) the mixture of TOPO and OD in 1:12 molar ratioBack to article page