STSM completed: ZnO/Ag heterostructures are expected to exhibit UVA-induced photocatalytic effect which are due to the presence of ZnO and magnified by the presence of Ag nanoparticles. While these surfaces have been shown to be effective against planktonic bacteria, their action against biofilms is still unknown. As such, the objective of this STSM is to assess the efficacy of ZnO/Ag surfaces against mono- or multi-species