Control of the saturation temperature in magnetic heating by using polyethylene-glycol-coated rod-shaped nickel-ferrite (NiFe2O4) nanoparticles

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• 作者：Yousaf Iqbal ; Hongsub Bae ; Ilsu Rhee…
• 关键词：Nickel ; ferrite nanoparticles ; Saturation temperature ; Polyethylene ; glycol coating ; Curie temperature
• 刊名：Journal of the Korean Physical Society
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：68
• 期：4
• 页码：587-592
• 全文大小：1,474 KB
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• 作者单位：Yousaf Iqbal (1)
  Hongsub Bae (1)
  Ilsu Rhee (1)
  Sungwook Hong (2)
  
  1. Department of Physics, Kyungpook National University, Daegu, 41566, Korea
  2. Division of Science Education, Daegu University, Gyeongsan, 38453, Korea
  
• 刊物主题：Physics, general; Theoretical, Mathematical and Computational Physics; Particle and Nuclear Physics;
• 出版者：Springer Netherlands
• ISSN：1976-8524

文摘

Polyethylene-glycol (PEG)-coated nickel-ferrite nanoparticles were prepared for magnetic hyperthermia applications by using the co-precipitation method. The PEG coating occurred during the synthesis of the nanoparticles. The coated nanoparticles were rod-shaped with an average length of 16 nm and an average diameter of 4.5 nm, as observed using transmission electron microscopy. The PEG coating on the surfaces of the nanoparticles was confirmed from the Fourier-transform infrared spectra. The nanoparticles exhibited superparamagnetic characteristics with negligible coercive force. Further, magnetic heating effects were observed in aqueous solutions of the coated nanoparticles. The saturation temperature could be controlled at 42 ℃ by changing the concentration of the nanoparticles in the aqueous solution. Alternately, the saturation temperature could be controlled for a given concentration of nanoparticles by changing the intensity of the magnetic field. The Curie temperature of the nanoparticles was estimated to be 495 ℃. These results for the PEG-coated nickel-ferrite nanoparticles showed the possibility of utilizing them for controlled magnetic hyperthermia at 42 ℃.