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We used ionic poly((methyl methacrylate)-co-(methacrylic acid)) (PMA-MAA) copolymer spheres (500nm) as a core template, synthesized using a soap-free emulsion polymerization method, to prepare monodispersed hollow nanocomposite spheres (HNCS). Ceramic type (CoFe 2 O 4 /SiO 2 ) HNCS and metallic type (CoFe alloy/SiO 2 ) HNCS were prepared by calcining PMA-MAA/CoFe ...
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