RT Journal Article
T1 Improving the magnetic heating by disaggregating nanoparticles
A1 Arteaga Cardona, F.
A1 Rojas Rojas, K.
A1 Méndez Rojas, M. A.
A1 Hernando Grande, Antonio
A1 Presa Muñoz De Toro, Patricia Marcela De La
AB 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.
PB Elsevier Science SA
SN 0925-8388
YR 2016
FD 2016-04-05
LK https://hdl.handle.net/20.500.14352/24392
UL https://hdl.handle.net/20.500.14352/24392
LA eng
NO © 2016 Elsevier B.V.This work was supported by grants from the Spanish Ministry of Science and Innovation (MAT2012-37109-C02-01), and Fundación Mutua Madrileña (Spain).
NO Ministerio de Ciencia e Innovación (MICINN), España
NO Fundación Mutua Madrileña, España
DS Docta Complutense
RD 8 jul 2025