Improving the magnetic heating by disaggregating nanoparticles

被引：66

作者：

Arteaga-Cardona, F. ^{[1
,2
]}

Rojas-Rojas, K. ^{[1
,2
]}

Costo, R. ^{[3
]}

Mendez-Rojas, M. A. ^{[2
]}

Hernando, A. ^{[1
,4
]}

de la Presa, P. ^{[1
,4
]}

机构：

[1] UCM ADIF CSIC, Inst Magnetismo Aplicado, A6 22,500 Km, Las Rozas 28230, Spain

[2] Univ Americas Puebla, Dept Ciencias Quim Biol, Cholula 72810, Mexico

[3] CSIC, ICMM, Sor Juana Ines de la Cruz 3, Madrid 28049, Spain

[4] UCM, Dept Fis Mat, Ciudad Univ, Madrid 28040, Spain

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 663卷

关键词：

Magnetic heating; Cobalt ferrite; Manganese ferrite; Nanoparticles; SAR; Hyperthermia; MFE2O4; M; PARTICLE HYPERTHERMIA; ABSORPTION RATE; SIZE; MN; CO; COPRECIPITATION; GAMMA-FE2O3; FE; FIELD;

D O I：

10.1016/j.jallcom.2015.10.285

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：

Recently, potential applications of the magnetic heating for heterogeneous catalysis or organic synthesis have been reported. As these new applications are not limited by biocompatibility requirements, a wide range of possibilities for non-aqueous colloidal nanoparticles with enhanced magnetic properties is open. In this work, manganese and cobalt ferrite nanoparticles are synthesized by co-precipitation method with average particle size around 12 nm. The particles are either coated with tetramethylammonium hydroxide (TMAOH) and dispersed in water or with oleic acid (OA) and dispersed in hexane to produce aggregated or disaggregated nanoparticles, respectively. It is observed that the particle disaggregation improves significantly the heating efficiency from 12 to 96 W/g in the case of cobalt ferrite, and from 120 to 413 W/g for the manganese ferrite. The main responsible for this improvement is the reduction of hydrodynamic volume that allows a faster Brownian relaxation. This work also discusses the relevance of the size distribution. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：636 / 644

页数：9

共 46 条

[1] Heating ability of cobalt ferrite nanoparticles showing dynamic and interaction effects [J].