Quantitative Evaluation of the Total Magnetic Moments of Colloidal Magnetic Nanoparticles: A Kinetics-based Method

被引：9

作者：

Liu, Haiyi ^{[1
,2
]}

Sun, Jianfei ^{[1
,2
,3
]}

Wang, Haoyao ^{[1
,2
]}

Wang, Peng ^{[1
,2
]}

Song, Lina ^{[1
,2
]}

Li, Yang ^{[1
,2
]}

Chen, Bo ^{[1
,2
]}

Zhang, Yu ^{[1
,2
,3
]}

Gu, Ning ^{[1
,2
,3
]}

机构：

[1] Southeast Univ, Sch Biol Sci & Med Engn, State Key Lab Bioelect, Nanjing 210096, Jiangsu, Peoples R China

[2] Southeast Univ, Jiangsu Key Lab Biomat & Devices, Nanjing 210009, Jiangsu, Peoples R China

[3] Suzhou Key Lab Biomat & Technol, Collaborat Innovat Ctr Suzhou Nanosci & Technol, Suzhou 215123, Peoples R China

来源：

CHEMPHYSCHEM | 2015年 / 16卷 / 08期

基金：

中国国家自然科学基金;

关键词：

bioelectronics; colloids; droplet kinetics; magnetic properties; nanoparticles; IMMISCIBLE VISCOUS MEDIA; FIELD-INDUCED MOTION; HYPERTHERMIA; NANOCRYSTALS;

D O I：

10.1002/cphc.201500093

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A kinetics-based method is proposed to quantitatively characterize the collective magnetization of colloidal magnetic nanoparticles. The method is based on the relationship between the magnetic force on a colloidal droplet and the movement of the droplet under a gradient magnetic field. Through computational analysis of the kinetic parameters, such as displacement, velocity, and acceleration, the magnetization of colloidal magnetic nanoparticles can be calculated. In our experiments, the values measured by using our method exhibited a better linear correlation with magnetothermal heating, than those obtained by using a vibrating sample magnetometer and magnetic balance. This finding indicates that this method may be more suitable to evaluate the collective magnetism of colloidal magnetic nanoparticles under low magnetic fields than the commonly used methods. Accurate evaluation of the magnetic properties of colloidal nanoparticles is of great importance for the standardization of magnetic nanomaterials and for their practical application in biomedicine.

引用

页码：1598 / 1602

页数：5

共 20 条

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