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

MnFe204 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 MnFe204 NPs with a s...

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Bibliographic Details
Published in:Chinese physics B 2015-06, Vol.24 (6), p.556-559
Main Author: 邱庆伟 徐晓文 何芒 张洪旺
Format: Article
Language:English
Subjects:
Field strength
hyperthermia
Magnetic cores
magnetic nanoparticles
Magnetization
manganese ferrite
Nanoparticles
Particle size
Radio frequencies
Remote control
silica coating
Silicon dioxide
二氧化硅
加热能力
包覆
射频
硅纳米颗粒
纳米粒子
铁氧体
高饱和磁化强度
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Description
Summary:MnFe204 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 MnFe204 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. MnFe204/SiO2 NPs with 18-nm magnetic cores showed the highest heat- generation ability under an RF field. These MnFe204/SiO2 NPs have great potentiality to cancer treatments, controlled drug releases, and remote controls of single cell functions.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/24/6/067503