▎ 摘　　要

NOVELTY - Composition comprises many magnetic particles, each magnetic particle comprising a core particle and a targeting moiety extending from the core particle via a photocleavable linker, the photocleavable linker connecting the magnetic particle and the targeting moiety, where the targeting moiety specifically binds to an extracellular vesicle surface marker for isolating the extracellular vesicle. USE - The composition is useful for isolating an extracellular vesicle, where the extracellular vesicle is an exosome (claimed) and the vesicle is useful as cancer vaccines, immunotherapy delivery, and other delivery associated with in vivo transportation. Test details are described but no results given.