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Different kinds of surfactants,such as a non-ionic surfactant(polyvinylpyrrolidone,PVP),a cationic surfactant(cetyltrimethylammonium bromide,CTAB)and an anionic surfactant(sodium dodecylsulfate surfactants,SDS),were firstly selected as additives to modify Ni-doped Fe3O4 clusters synthesis.