Enhancing the catalytic performance of MOF-polymer@AuNP-based nanozymes for colorimetric detection of serum l-cysteine

U66-PV-Pep@AuNP composite nanozymes exhibited higher POD-like activity than Pep@AuNPs-on-U66 in TMB oxidation. Based upon the decrease of its catalytic activity by l -Cys, an assay for highly selective and sensitive detection of rat serum l -Cys was established.