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Core/shell particles were synthesized by assembling oppositely charged ferrite (Fe 3 O 4 or NiFe 2 O 4 ) nanoparticles on the surface of monodispersed silica core particles (having size ∼0.4μm) prepared by hydrolysis and condensation of tetraethylortosilicate. Optimal conditions for synthesis of silica core/nano-Fe 3 O 4 shell particles were found at...
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