Magnetic aligned vesicles

Self-assembled magnetic vesicles based on cationic double-chain dimethyldioctadecylammonium (DODMA+) encapsulating two kinds of magnetic polyoxometalates, K10[Co4(H2O)2(PW9O34)2]·20H2O ({Co4P2W18}) and Mo72VIFe30IIIO252L102·180H2O with L=H2O/CH3COO-/Mo2O8/9n- ({Mo72Fe30}), were fabricated in mixed-solvent solution (CHCl3 + CH3OH, 4:1 v/v). The vesicles were characterized by scanning electron microscopy (SEM), transition electron microscopy (TEM), atomic force microscopy (AFM), and dynamic light scattering (DLS). SEM and TEM images show that three-dimensional hollow shells of the magnetic vesicles can survive after solvent evaporation. The room-temperature magnetic properties were measured, indicating that {Co4P2W18} and {Mo72Fe30} retain their magnetic properties after embedding in the vesicles. Interestingly, the self-assembled magnetic vesicles can be aligned under an external magnetic field, which make them ideal candidates as magnetic biosensors for drug-releasing materials.

Self-assembled magnetic vesicles of cationic double-chain dimethyldioctadecylammonium encapsulated two kinds of polyoxometalates, {Co4P2W18} and {Mo72Fe30}, were fabricated in mixed-solvent (CHCl3 + CH3OH).Figure optionsDownload high-quality image (96 K)Download as PowerPoint slide