Comparison of previously reported nanozymes used in determination of cysteine with this study.

No.	Nanomaterial	Limit of detection (μmol L−1)	Linear range (μmol L−1)	Reference
1	AgNPs@Fe3O4	0.087	0–20	13
2	DNA–Ag/Pt	0.002	0.005–0.5	47
3	Fe3+ ions	0.97	0–50	50
4	Fe, N-GQDs	0.14	0.5–50	51
5	Cu@Au(Ag)/Pt	4.0	0–400; 400–3000	52
6	AgNPs	0.0904	0.5–20	This work