 This research has developed a new method to increase the photothermal conversion efficiency of polydopamine nanoparticles, making them more effective at killing bacteria. The researchers used silver nanoparticles to coat the polydopamine nanoparticles, creating a new type of photothermal agent that is able to deliver higher levels of energy to the targeted cells. Additionally, they incorporated the nanoparticles into a hydrogel matrix, which prevents them from clumping together and allows them to be delivered directly to the site of infection. In tests, this combination was found to be highly effective against bacteria, demonstrating its potential use in treating infected wounds. This article was authored by Xiao Yangqi, Yijing Huang, Xingye Yu, and others.