Fig. 3

tan δ and Q-factor vs frequency plots of ZnO, SnO and ZnSnO NCs (a, b), (ZnSn)₁₋ₓCoₓO NCs (c, d), and (ZnSn)₁₋ₓCuₓO NCs (e, f).

tan δ and Q-factor vs frequency plots of ZnO, SnO and ZnSnO NCs (a, b), (ZnSn)₁₋ₓCoₓO NCs (c, d), and (ZnSn)₁₋ₓCuₓO NCs (e, f).