RT Journal Article
T1 Magnetic Nanoparticles for Power Absorption: optimizing size, shape and magnetic properties.
A1 Gonzalez Fernandez, M. A.
A1 Torres, T.
A1 Andrés Vergés, M.
A1 Costo, R.
A1 Presa Muñoz del Toro, Patricia de la
A1 Serna, C. J.
A1 Morales, M. P.
A1 Marquina, C.
A1 Ibarra, M. R.
A1 Goya, G. F.
AB We present a Study on the magnetic properties of naked and silica-coated Fe₃O₄nanoparticles with sizes between 5 and 110 nm. Their efficiency as heating agents was assessed through specific power absorption (SPA) measurements as a function of particle size and shape. The results show a strong dependence of the SPA with the particle size, with a maximum around 30 nm, as expected for a Neel relaxation mechanism in single-domain particles. The SiO₂shell thickness was found to play an important role in the SPA mechanism by hindering the heat Outflow, thus decreasing the heating efficiency. It is concluded that a compromise between good heating efficiency and surface functionality for biomedical purposes can be attained by making the SiO₂functional coating as thin as possible.
PB Elsevier
SN 0022-4596
YR 2009
FD 2009-10
LK https://hdl.handle.net/20.500.14352/42780
UL https://hdl.handle.net/20.500.14352/42780
LA eng
NO ©Elsevier.The authors acknowledge the financial support from Diputación General de Aragón, Comunidad de Madrid (S-0505/MAT/0194), and Ministerio de Ciencia e Innovación (MAT2005-03179 and MAT2008-01489). GFG and PP acknowledge support from the Spanish MEC through the Ramon y Cajal program.
NO Ministerio de Ciencia e Innovación (MICINN)
NO Comunidad de Madrid
NO Diputación General de Aragón
NO Spanish MEC through the Ramon y Cajal program
DS Docta Complutense
RD 3 may 2024