Oxygen Vacancy Piezoelectric Nanosheets Constructed by a Photoetching Strategy for Ultrasound “Unlocked” Tumor Synergistic Therapy

Piezoelectric dynamic therapy (PzDT) is an effective method of tumor treatment by using piezoelectric polarization to generate reactive oxygen species. In this paper, two-dimensional Cu-doped BiOCl nanosheets with surface vacancies are produced by the photoetching strategy. Under ultrasound, a built-in electric field is generated to promote the electron and hole separation. The separated carriers achieve O