Zirconium Oxide Nanoparticles (Monoclinic + Tetragonal): Properties, Synthesis, and Applications Introduction Zirconium oxide nanoparticles (ZrO² NPs) are notable for their diverse applications due to their unique structural phases. Among these, the monoclinic and tetragonal phases are particularly significant. Zirconium oxide can exist in several crystal structures, with monoclinic and tetragonal being the most relevant for...