中国物理B ›› 2015, Vol. 24 ›› Issue (6): 67503-067503.doi: 10.1088/1674-1056/24/6/067503

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Radio-frequency-heating capability of silica-coated manganese ferrite nanoparticles

邱庆伟a, 徐晓文a, 何芒a, 张洪旺b   

  1. 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
  • 收稿日期:2015-01-21 修回日期:2015-02-05 出版日期:2015-06-05 发布日期:2015-06-05

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   

  1. 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
  • Received:2015-01-21 Revised:2015-02-05 Online:2015-06-05 Published:2015-06-05
  • Contact: Qiu Qing-Wei E-mail:qiuqingwei@bit.edu.cn
  • About author:75.47.Lx; 75.75.-c

摘要:

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.

关键词: manganese ferrite, magnetic nanoparticles, silica coating, hyperthermia

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.

Key words: manganese ferrite, magnetic nanoparticles, silica coating, hyperthermia

中图分类号:  (Magnetic oxides)

  • 75.47.Lx
75.75.-c (Magnetic properties of nanostructures)