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. 2017 Apr 13;12:3077–3094. doi: 10.2147/IJN.S132570

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© 2017 Wang et al. This work is published and licensed by Dove Medical Press Limited

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(A) UV–vis spectra and (B) magnetic hysteresis curves of the prepared Fe₃O₄, Fe₃O₄@SiO₂, Fe₃O₄@SiO₂–Ag seed microspheres, and Fe₃O₄@SiO₂@Ag microflowers. Insets in (A) and (B) show suspensions before and after magnetic enrichment by an external magnetic force, respectively.