The influence of colloidal parameters on the specific power absorption of PAA-coated magnetite nanoparticles

被引：139
作者：
Pineiro-Redondo, Yolanda [1 ,2 ]
Banobre-Lopez, Manuel [1 ,2 ]
Pardinas-Blanco, Ivan [3 ]
Goya, Gerardo [4 ,5 ]
Arturo Lopez-Quintela, M. [1 ,2 ]
Rivas, Jose [1 ,2 ]
机构：
[1] Univ Santiago de Compostela, Dept Appl Phys, Santiago De Compostela 15782, Spain
[2] Univ Santiago de Compostela, Dept Phys Chem, Santiago De Compostela 15782, Spain
[3] Nanogap Subnmpowder SA, R&D Dept, Ames 15985, A Coruna, Spain
[4] Univ Zaragoza, Inst Nanociencia Aragon, Zaragoza 50018, Spain
[5] Univ Zaragoza, Dept Condensed Matter Phys, Zaragoza 50018, Spain
来源：
NANOSCALE RESEARCH LETTERS | 2011年 / 6卷
关键词：
IRON-OXIDE NANOPARTICLES; HYPERTHERMIA; SIZE; FLUID; RATES;
D O I：
10.1186/1556-276X-6-383
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The suitability of magnetic nanoparticles (MNPs) to act as heat nano-sources by application of an alternating magnetic field has recently been studied due to their promising applications in biomedicine. The understanding of the magnetic relaxation mechanism in biocompatible nanoparticle systems is crucial in order to optimize the magnetic properties and maximize the specific absorption rate (SAR). With this aim, the SAR of magnetic dispersions containing superparamagnetic magnetite nanoparticles bio-coated with polyacrylic acid of an average particle size of approximate to 10 nm has been evaluated separately by changing colloidal parameters such as the MNP concentration and the viscosity of the solvent. A remarkable decrease of the SAR values with increasing particle concentration and solvent viscosity was found. These behaviours have been discussed on the basis of the magnetic relaxation mechanisms involved.
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页码：1 / 7
页数：7
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