Size dependent heating ability of CoFe2O4 nanoparticles in AC magnetic field for magnetic nanofluid hyperthermia

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Celik O., Can M. M., Firat T.

JOURNAL OF NANOPARTICLE RESEARCH, cilt.16, sa.3, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 16 Sayı: 3
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1007/s11051-014-2321-6
  • Dergi Adı: JOURNAL OF NANOPARTICLE RESEARCH
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Magnetic nanoparticles, Hyperthermia, Magnetic nanofluid hyperthermia, CoFe2O4, Nanomedicine, PARTICLE HYPERTHERMIA, FLUIDS
  • İstanbul Üniversitesi Adresli: Hayır

Özet

We investigated the size dependent magnetic properties and heating mechanism of spinel CoFe2O4 nanoparticles, which synthesized using the nonhydrolytic thermal decomposition method. The size of CoFe2O4 nanoparticles was arranged with the variation of solvent type, reflux time, and reflux temperature. The optimum size range was determined for magnetic fluid hyperthermia. The particles with 9.9 +/- 0.3 nm average diameter have the highest heating ability in the AC magnetic field having 3.2 kA/m amplitude and 571 kHz frequency. The maximum specific absorption rate of 22 W/g was obtained for 9.9 +/- 0.3 nm sized CoFe2O4 nanoparticles. The calculations and experimental results showed the dominancy of Brownian relaxation at the heat production of synthesized 9.9 +/- 0.3 nm nanoparticles. In contrary, the magneto-heating in 5.4 +/- 0.2 nm particles mainly originated from Neel relaxation.

We investigated the size dependent magnetic properties and heating mechanism of spinel CoFe2O4nanoparticles, which synthesized using the nonhydrolytic thermal decomposition method. The size of CoFe2O4 nanoparticles was arranged with the variation of solvent type, reflux time, and reflux temperature. The optimum size range was determined for magnetic fluid hyperthermia. The particles with 9.9 ± 0.3 nm average diameter have the highest heating ability in the AC magnetic field having 3.2 kA/m amplitude and 571 kHz frequency. The maximum specific absorption rate of 22 W/g was obtained for 9.9 ± 0.3 nm sized CoFe2O4 nanoparticles. The calculations and experimental results showed the dominancy of Brownian relaxation at the heat production of synthesized 9.9 ± 0.3 nm nanoparticles. In contrary, the magneto-heating in 5.4 ± 0.2 nm particles mainly originated from Neel relaxation.