Visual detection of quercetin by Cu-tannic acid nanosheets (Cu-TA NShs) as a laccase mimicking nanozyme

This study introduces the Cu-tannic acid nanosheets (Cu-TA NShs) as a novel nanozyme for quercetin (Qur) assay in the presence of CTAB surfactant under acidic conditions. The Cu-TA NShs by mimicking the laccase enzyme presents a selective colorimetric sensor for visually detecting trace amounts of Qur from ۰.۳۵۰ µM to ۳۲.۰۹ µM, with a LOD of ۰.۰۶۴ µM. The applicability of the naked-eye sensor for detecting Qur in foods and vegetables has been confirmed through HPLC as the reference method and statistical evaluation that promises a user-friendly methodology for situ analysis in the real world.

کلیدواژه ها:

Copper tannic acid nanosheets ، Nanozyme ، Quercetin ، enzyme-free assay