TY - JOUR
T1 - Heat dissipation mechanism of magnetite nanoparticles in magnetic fluid hyperthermia
AU - Suto, Makoto
AU - Hirota, Yasutake
AU - Mamiya, Hiroaki
AU - Fujita, Asaya
AU - Kasuya, Ryo
AU - Tohji, Kazuyuki
AU - Jeyadevan, Balachandran
PY - 2009/5/1
Y1 - 2009/5/1
N2 - The relative contributions of Néel and Brownian relaxations on magnetic heat dissipation were studied by investigating the physical, magnetic and heating characteristics of magnetite nanoparticle suspensions with average diameters of 12.5 and 15.7 nm. Heating characteristics depended on the dispersion states of particles. The specific absorption rates (SAR) dropped by 27% for the 12.5 nm particles to 16.8×10-9 W g-1 Oe-2 Hz-1 and by 67% for the 15.7 nm particles to 9.69×10-9 W g-1 Oe-2 Hz-1, when the particle rotation was suppressed by dispersing magnetite nanoparticles in hydro-gel.
AB - The relative contributions of Néel and Brownian relaxations on magnetic heat dissipation were studied by investigating the physical, magnetic and heating characteristics of magnetite nanoparticle suspensions with average diameters of 12.5 and 15.7 nm. Heating characteristics depended on the dispersion states of particles. The specific absorption rates (SAR) dropped by 27% for the 12.5 nm particles to 16.8×10-9 W g-1 Oe-2 Hz-1 and by 67% for the 15.7 nm particles to 9.69×10-9 W g-1 Oe-2 Hz-1, when the particle rotation was suppressed by dispersing magnetite nanoparticles in hydro-gel.
KW - Brown relaxation
KW - Heat dissipation
KW - Magnetic fluid
KW - Magnetite
KW - Néel relaxation
UR - http://www.scopus.com/inward/record.url?scp=64249143013&partnerID=8YFLogxK
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U2 - 10.1016/j.jmmm.2009.02.070
DO - 10.1016/j.jmmm.2009.02.070
M3 - Article
AN - SCOPUS:64249143013
VL - 321
SP - 1493
EP - 1496
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
IS - 10
ER -