4.4 Article

TiO2 microspheres containing magnetic nanoparticles for intra-arterial hyperthermia

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WILEY
DOI: 10.1002/jbm.b.33765

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magnetic nanoparticles; TiO2; microspheres; hyperthermia

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  1. Grants-in-Aid for Scientific Research [16H03177] Funding Source: KAKEN

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Magnetic microspheres measuring 15-35 mu m in diameter are believed to be useful for intra-arterial hyperthermia. In this study, we attempted to prepare titanium dioxide (TiO2) microspheres containing magnetic nanoparticles (MNPs). MNP-containing TiO2 microspheres with diameters of approximately 30 mu m were successfully obtained by sol-gel reaction of titanium tetraisopropoxide in a water-in-oil emulsion with added cosurfactant of 1-butanol and subsequent heat treatment at 200 degrees C. The microspheres showed ferrimagnetism owing to high content of MNPs in approximately 60 wt % and had a low-crystalline TiO2 matrix. Furthermore, the agar phantom was heated to above 43 degrees C after approximately 1 min under an alternating magnetic field of 100 kHz and 300 Oe and showed in vitro biocompatibility similar to that of MNP-free TiO2 microspheres. (C) 2016 Wiley Periodicals, Inc.

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