Fig. 1.

(A) Schematic illustration of oxidation color reaction of TMB with H₂O₂ catalyzed by C dots. (B) Time-dependent absorbance changes at 652 nm of TMB in different reaction systems: (a) C dots + TMB, (b) TMB + H₂O₂ and (c) TMB + C dots + H₂O₂ in a pH 3.5 NaAc buffer (0.2 M) at 35°C. C dots are presented in C-Dots in the figure. Reproduced from Ref. [83] with permission from The Royal Society of Chemistry.