| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Radio-frequency-heating capability of silica-coated manganese ferrite nanoparticles |
| Qiu Qing-Wei (邱庆伟)a, Xu Xiao-Wen (徐晓文)a, He Mang (何芒)a, Zhang Hong-Wang (张洪旺)b |
a School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China;
b Department of Physics, University at Buffalo, SUNY, Buffalo, New York 14260, USA |
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Abstract MnFe2O4 nanoparticles (NPs) with various sizes and tight size-distribution were synthesized by a chemical solution-phase method. The as-synthesized NPs were coated with a silica shell of 4 nm–5 nm in thickness, enabling the water-solubility and biocompatibility of the NPs. The MnFe2O4 NPs with a size of less than 18 nm exhibit superparamagnetic behavior with high saturated magnetization. The capacity of the heat production was enhanced by increasing particle sizes and radio frequency (RF) field strengths. MnFe2O4/SiO2 NPs with 18-nm magnetic cores showed the highest heat-generation ability under an RF field. These MnFe2O4/SiO2 NPs have great potentiality to cancer treatments, controlled drug releases, and remote controls of single cell functions.
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Received: 21 January 2015
Revised: 05 February 2015
Accepted manuscript online:
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PACS:
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75.47.Lx
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(Magnetic oxides)
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75.75.-c
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(Magnetic properties of nanostructures)
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Corresponding Authors:
Qiu Qing-Wei
E-mail: qiuqingwei@bit.edu.cn
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| About author: 75.47.Lx; 75.75.-c |
Cite this article:
Qiu Qing-Wei (邱庆伟), Xu Xiao-Wen (徐晓文), He Mang (何芒), Zhang Hong-Wang (张洪旺) Radio-frequency-heating capability of silica-coated manganese ferrite nanoparticles 2015 Chin. Phys. B 24 067503
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