Magnetic Hyperthermia With Fe(3)O(4) Nanoparticles: The Influence of Particle Size on Energy Absorption
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2008
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Resumo |
We have studied the magnetic and power absorption properties of a series of magnetic nanoparticles (MNPs) of Fe(3)O(4) with average sizes < d > ranging from 3 to 26 rim. Heating experiments as a function of particle size revealed a strong increase in the specific power absorption (SPA) values for particles with < d > = 25-30 mn. On the other side saturation magnetization M(s) values of these MNPs remain essentially constant for particles with < d > above 10 rim, suggesting that the absorption mechanism is not determined by Ms. The largest SPA value obtained was 130 W/g, corresponding to a bimodal particle distribution with average size values of 17 and 26 nm. |
Identificador |
IEEE TRANSACTIONS ON MAGNETICS, v.44, n.11, p.4444-4447, 2008 0018-9464 http://producao.usp.br/handle/BDPI/29594 10.1109/TMAG.2008.2003508 |
Idioma(s) |
eng |
Publicador |
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC |
Relação |
Ieee Transactions on Magnetics |
Direitos |
closedAccess Copyright IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC |
Palavras-Chave | #Electromagnetic heating #ferrimagnetic materials #hyperthermia #magnetic domains #magnetic losses #RELAXATION #Engineering, Electrical & Electronic #Physics, Applied |
Tipo |
article proceedings paper publishedVersion |