Fig. 1. SEM images of polyluminol–Pt NPs on an ITO chip electrodeposited with different concentrations of H₂PtCl₆: (A) 9.6 mM; (B) 4.8 mM; (C) 2 mM and (D) 0.5 mM. The electrodepositions were performed in PBS (PH = 2) containing 0.05 M KCl at 60 °C and with an applied potential range from –0.8 V to 0.3 V for 50 cycles at 50 mV s^–1 by cyclic voltammetry. (E) ECL curves of the polyluminol–Pt NPs composite film electroplated with different concentrations of H₂PtCl₆ (0.05–9.6 mM). (F) ECL emission of the polyluminol–Pt NPs composite film electroplated with 0.5 mM of H₂PtCl₆.