Nanozymes have been widely used for the construction of colorimetric sensors. However, the simultaneous discrimination of multiple targets using nanozymes is still a challenge. In this work, we construct a multiple-readout system for pattern recognition of proteins using nanozyme. Graphitic carbon nitride (g-CN) nanosheets, which possess peroxidase-like activity, are chosen as the single sensing receptor. The catalytic activity of g-CN can be changed to different degrees owing to the different interactions between g-CN and proteins. By choosing different combinations of absorbance intensities at various time points, multichannel information can be extracted from a single material for pattern recognition. The platform avoids the synthesis of multiplex sensing receptors and the requirement of sophisticated instruments, leading to lower cost and time consumption. The study provides a new method for the construction of feasible, convenient, and flexibly nanozyme-based sensing arrays.
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