Transfer Interface‐Controlled Printing of 2D MOF for Charge‐Transfer Dynamics Engineering through Ultrasound‐Promoted Hetero‐Interfacial Polarization.

Understanding ultrasound‐induced charge transfer of 2D metal‐organic framework (2DMOF) nanofilms and their broad applications remain elusive. Herein, the "transfer interface‐controlled printing" 2DMOF high‐quality nanofilm is reported and in situ ultrasound‐irradiated Kelvin probe force microscopy is developed to trace the charge transfer dynamics at the nanoscale. Uniformly distributed, vertical/planar MoS2 nanosheets are grown on a porphyrin‐based 2DMOF and the local potential difference and piezoelectric polarization in these parallel and vertical 2DMOF‐MoS2 heterostructures generate a local internal polarization field to induce efficient interfacial charge transfer. This sonocatalytic platform improves electron–hole pair separation and sonocatalytic activity to boost reactive oxygen species (ROS) generation, providing a superior therapeutic effect against dental peri‐implant infection because effective ROS generation and stable Zn2+ release results in rapid peri‐implant anti‐infection and enhanced osseointegration at the bone–implant interface. This study offers a guideline for the optimization of charge transfer pathway of 2DMOF heterostructures with uniformity, thickness controllability, large‐scale and universal deposition, high catalytic efficiency, and abundant active site exposure for diverse advanced applications. [ABSTRACT FROM AUTHOR]