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SURFACTANT-ASSISTED VAPOR DIFFUSION SYNTHESIS OF CoFe 2 O 4 HOLLOW SPHERES
MIN FU,YUN ZHAO,QINGZE JIAO 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.4
Uniform CoFe 2 O 4 hollow spheres with diameter of about 300 nm and a shell thickness of ap-proximately 60 nm were synthesized by a easy vapor di®usion method in the presence of polyvinylpyrrolidone (PVP), in combination with calcination at 550?C. The structure and morphology ofas-prepared samples were characterized by electron microscopy and X-ray di®ractometry (XRD). The hollow spheres exhibited a high saturation magnetization value of 66.4 emu/g and coercivityof 417 Oe at room temperature. A possible formation mechanism for the CoFe 2 O 4 hollow sphereswas proposed.