| CNSs | carbon nanosheets |
| DMF | N,N–dimethylformamide |
| DMSO | dimethyl sulfoxide |
| EC | epicatechin (catechin) |
| EDS | energy–dispersive spectroscopy |
| EGCG | epigallocatechin gallate |
| GCG | gallocatechin gallate |
| HPLC | high–performance liquid chromatography |
| Km | Michaelis constant |
| LOD | limit of detection |
| MES | 2–(N–morpholino)ethanesulfonic acid |
| Mn–CNSs | manganese–doped carbon nanosheets |
| oxTMB | oxidized 3,3′,5,5′–tetramethylbenzidine |
| R2 | correlation coefficient |
| ROS | reactive oxygen species |
| TEM | transmission electron microscopy |
| TMB | 3,3′,5,5′–tetramethylbenzidine |
| UV–Vis | ultraviolet–visible |
| Vmax | maximum reaction rate |
| XPS | X–ray photoelectron spectroscopy |
| XRD | X–ray diffraction |
| β–LG | β–lactoglobulin |