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A facile, efficient approach to fabricate ZnFe2O4@ZnO nanoparticles with a good core–shell structure was reported, involving the coating of successive layers of ZnO nanoparticles on a magnetic core by a sol–gel hydrothermal method at low temperatures. The as-synthesized ZnFe2O4@ZnO nanoparticles exhibited a narrow size distribution, with a typical size of 210 ± 19 nm and shell thickness of 35 nm....
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