Mesoporous silica nanoparticles (MSNs) are silica nanoparticles with 2–30 nm pores. Their high surface area enables efficient drug loading, while tunable pore sizes allow encapsulation of diverse molecules. Surface functionalization can enable targeted delivery to specific cells or tissues, making MSNs a promising platform for demanding applications such as drug delivery, vaccines, and advanced cosmetic formulations. Learn more about selecting the right particle type in this infographic.