Enhancing remote controlled heating characteristics in hydrophilic magnetite nanoparticles via facile co-precipitation

Reynolds A. Frimpong, Jian Dou, Michael Pechan, J. Zach Hilt

Research output: Contribution to journalArticlepeer-review

63 Scopus citations


Citric acid coated magnetite nanoparticles were synthesized using a one-step and two-step co-precipitation method at different temperatures. The stability of the nanoparticles in aqueous media was compared. The magnetic heating characteristics in an alternating magnetic field were examined and specific absorption rates were determined. The nanoparticles were characterized by various techniques (Fourier transform infrared, UV spectrophotometry, thermogravimetric analysis, dynamic light scattering, transmission electron microscopy, X-ray diffraction and vibrating sample magnetometry). The temperature of synthesis and mode of functionalizing the particles affected their physical and magnetic properties. Higher temperatures led to increased specific absorption rates for both methods but more stable hydrophilic superparamagnetic nanoparticles were obtained in the one-step method.

Original languageEnglish
Pages (from-to)326-331
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
Issue number3
StatePublished - Feb 2010

Bibliographical note

Funding Information:
This work was supported in part by the National Science Foundation under Grant numbers ECS-0508254 (NSF NER), CTS-0609117 (NSF NIRT), and at Miami University by US Department of Energy Grant FG02-86ER45281


  • Functionalization
  • Iron oxide
  • Magnetic nanoparticle
  • Specific absorption rate

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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