Bacterial infection is an urgent public health problem. We design a novel photo-responsive hybrid material by growing small molecules of curcumin (Cur) in situ on a sea urchin-like Bi2S3 surface...

Bacterial infections are a serious public health issue that threatens the lives of patients because of their ability to induce other lethal complications without prompt treatment. Conventional antibiotic therapy can cause bacterial resistance and other adverse effects. It is highly desirable to develop effective and antibiotic‐independent therapeutic strategies to treat various kinds of bacterial infections. Herein, sonodynamic‐enhanced piezoelectric materials MoS2 and Cu2Oheterostructure that responds to exogenous ultrasound (US) and generates reactive oxygen for Staphylococcus aureus elimination are developed. It is shown in the results that the polariton charge induced by piezoelectric MoS2 nanosheets under US irradiation can accelerate the transfer of electric in Cu2O. Furthermore, US irradiation induces valence conversion from Cu(I) to Cu(II), which can accelerate glutathione oxidation significantly and destroy the bacterial antioxidant defense system. Hence, the as‐prepared piezoelectric‐enhanced sonosensitizer possesses a highly effective antibacterial efficacy of 99.85% against S. aureus under US irradiation for 20 min, with good biocompatibility. Herein, effective ultrasonic piezocatalytic therapy is offered through constructing heterogeneous interfaces with ultrasonic piezoelectric response.

Osteomyelitis caused by bacteria is a deep-seated lesion and is often treated clinically with antibiotics. Long-term use of antibiotics may predispose bacteria to develop resistance. Here, CuCeO x material is applied to treat infectious bacterial osteomyelitis using microwave (MW)-assisted bacterial killing. Heat generation occurs as a result of the dielectric properties of the material under MW irradiation, and the material generates reactive oxygen species (ROS) under MW irradiation. Heat and ROS increase the thermal sensitivity and permeability of bacterial cell membranes, and the released copper ions easily penetrate the bacterial membrane and react with H 2 O 2 to produce a toxic hydroxyl group inside the bacteria, leading to the bacteria's eventual death. This is due to the synergistic effect of the MW thermal effect, ROS, and the breaking of the equilibrium within the bacteria. CuCeO x can effectively treat osteomyelitis caused by Staphylococcus aureus using MW irradiation. This study can safely and effectively address the challenge of deep tissue infections by shedding light on non-invasive antimicrobial systems and using MW thermal therapy and MW dynamics to achieve therapeutic results.