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Chainlike assembly of magnetite coated with SiO2 nanostructures induced by an applied magnetic field |
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| Authors: | Mingzai Wu Yongqing Ma Hong Bi Helin Niu |
| Affiliation: | a Key Laboratory of Opto-Electronic Information Acquisition and Manipulation (Ministry of Education), School of Physics and Materials Science, Anhui University, Hefei 230039, China b School of Chemistry and Chemical Engineering, Anhui University, Hefei 230039, China c Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China |
| Abstract: | The assembly of silica coated magnetite nanoparticles into chainlike nanostructures is reported in the presence of applied magnetic field. The coating of SiO2 onto the surface of magnetite nanoparticles was successfully conducted with the hydrolysis and condensation of tetraethyl orthosilicate. X-ray diffraction and transmission electron microscopy were used to characterize the microstructure and morphology. Vibrating sample magnetometry reveals that the coercivity is dependent on the coating thickness and can be controlled to a certain extent. |
| Keywords: | A. Magnetic materials A. Nanostructures B. Sol-gel chemistry D. Magnetic properties |
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