 The Janus piezoelectric hydrogel patch, JPHG, is a new type of medical device designed to treat infected wounds. It combines two layers of material, one containing gold nanoparticles that are activated by ultrasonic waves, and another containing growth factors that stimulate tissue regrowth. When exposed to ultrasonic waves, the gold nanoparticles generate reactive oxygen species that kill bacteria, while the growth factor layer promotes tissue regeneration. In tests, the JPHG was able to eliminate bacterial infections and promote tissue regeneration in infected wounds. This technology could be used to treat a wide range of conditions, from burns to chronic wounds. This article was authored by Dan Qing Huang, Yi Cheng, Guo Puchen, and others.