Fig. 3

Investigation of the multi-function PtCo/CdS@GO luminophores. A The ECL responses of PtCo/CdS@GO luminophores in 0.01 M PBS (pH 7.4) containing 5 mM H₂O₂ (a), 0.1 M K₂S₂O₈ (b), 5 mM H₂O₂ and 0.1 M K₂S₂O₈ (c). B Time-dependent absorbance of oxTMB upon the addition of Fe₃O₄, PtCo/CdS@GO, PtCo/rGO and HRP in TMB/H₂O₂ system. C The ECL responses of CdS NCs (a), PtCo/CdS NCs (b), PtCo/CdS@GO (c, Cd/S = 1/4) and PtCo/CdS@GO luminophores (d, Cd/S = 1/1) in 0.01 M PBS (pH 7.4) containing 5 mM H₂O₂ and 0.1 M K₂S₂O₈. The ECL experiments were scanned from − 1.6 V to − 0.6 V at a scan rate of 0.1 V s^− 1