Furthermore, the anticancer agent elesclomol was encapsulated within the open pores of magnetic mesoporous silica nanoparticles, which were subsequently sealed with gold gatekeepers, and the nanoparticle surface functionalized with polyethylene glycol and an epithelial cell adhesion molecule (EpCAM)-specific aptamer for improved biocompatibility and tumor targeting [197]. Here, EPCAM is linked to neoplasm.