Fig. 5. The ECL response of the CDs and NCDs1–NCDs6. (A) ECL emission with 100 mM S2O82− under continuous cyclic scanning from −1.8 V to 0 V in 100 mM PBS (pH 7.4, containing 100 mM KCl) over 20 cycles. The voltage of the photomultiplier tube (PMT) was set to 700 V (from (a to h) GCE; CDs; NCDs1; NCDs2; NCDs3; NCDs4; NCDs5; NCDs6). (B) The percentage increase in ECL intensity compared to the CDs.
