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PREPARATION OF MAGNETIC COMPOSITE OF NiFe₂O₄@SiO₂ AND THE ASSEMBLY OF THE COLLOID PARTICLES BY MAGNETIC FIELDS

JUN WANG

Faculty of Science, Ningbo University, Ningbo, 315211, China

Corresponding author.

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YUEJIN ZHU

Faculty of Science, Ningbo University, Ningbo, 315211, China

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, and

QIANWANG CHEN

Department of Materials Science & Engineering, University of Science & Technology of China, Hefei 230026, China

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https://doi.org/10.1142/S0217979205029626Cited by:3 (Source: Crossref)

Abstract

Nearly monodisperse silica spheres with a diameter of ~90 nm containing NiFe₂O₄ nanoparticles were successfully prepared by hydrolysis of TEOS in the presence of NiFe₂O₄ nanoparticles, synthesized through a hydrothermal method. The colloid particles were characterized by XRD, TEM and VSM. The results indicate that the particles possess better magnetic properties at room temperature, compared with paramagnetic colloids with magnetic core by co-precipitation method. The colloid particles assembled under additional magnetic fields could have potential application in biomedical systems.

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