Fig. 4

Plots of Z′ and Z″ vs frequency of ZnO, SnO and ZnSnO NCs (a, b), (ZnSn)₁₋ₓCoₓO NCs (c, d), and (ZnSn)₁₋ₓCuₓO NCs (e, f).

Plots of Z′ and Z″ vs frequency of ZnO, SnO and ZnSnO NCs (a, b), (ZnSn)₁₋ₓCoₓO NCs (c, d), and (ZnSn)₁₋ₓCuₓO NCs (e, f).