Wet/Sono‐Chemical Synthesis of Enzymatic Two‐Dimensional MnO2 Nanosheets for Synergistic Catalysis‐Enhanced Phototheranostics

2D nanomaterials have attracted broad interest in the field of biomedicine owing to their large surface area, high drug-loading capacity, and excellent photothermal conversion. However, few studies report their "enzyme-like" catalytic performance because it is difficult to prepare enzymatic nanosheets with small size and ultrathin thickness by current synthetic protocols. Herein, a novel one-step wet-chemical method is first proposed for protein-directed synthesis of 2D MnO