• DocumentCode
    822998
  • Title

    Synthesis and characterization of stable colloidal Fe3O 4 particles in water-in-oil microemulsions

  • Author

    Lee, K.M. ; Sorensen, C.M. ; Klabunde, K.J. ; Hadjipanayis, G.C.

  • Author_Institution
    Kansas State Univ., Manhattan, KS, USA
  • Volume
    28
  • Issue
    5
  • fYear
    1992
  • fDate
    9/1/1992 12:00:00 AM
  • Firstpage
    3180
  • Lastpage
    3182
  • Abstract
    The authors have prepared nanometer-size magnetite particles in Aerosol OT (AOT)/water/iso-octane water-in-oil (w/o) microemulsions. The sizes of the particles in the colloids were inferred from dynamic light scattering (DLS) and were on the order of one nanometer. Those in dried samples were measured using transmission electron microscopy (TEM) and were 5-20 nm. This implies that aggregation occurs during drying. X-ray diffraction showed that the particles´ phase was consistent with magnetite. Magnetic properties were studied using a superconducting quantum interference device (SQUID) magnetometer. The colloids showed a superparamagnetic behavior and the dried samples showed a ferromagnetic behavior, supporting the size measurements using DLS and TEM, respectively
  • Keywords
    X-ray diffraction examination of materials; emulsions; ferromagnetic properties of substances; iron compounds; light scattering; magnetic fluids; magnetic hysteresis; magnetic properties of fine particles; nanostructured materials; particle size; superparamagnetism; transmission electron microscope examination of materials; 5 to 20 nm; Aerosol OT/water/iso-octane; SQUID magnetometer; X-ray diffraction; aggregation; colloidal Fe3O4 particles; drying; dynamic light scattering; ferromagnetic behavior; hysteresis loop; magnetic properties; nanometer-size magnetite particles; particle size; superparamagnetic behaviour; transmission electron microscopy; water-in-oil microemulsions; Aerodynamics; Aerosols; Iron; Light scattering; Magnetic properties; SQUIDs; Superconducting devices; Superconducting magnets; Transmission electron microscopy; X-ray diffraction;
  • fLanguage
    English
  • Journal_Title
    Magnetics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9464
  • Type

    jour

  • DOI
    10.1109/20.179751
  • Filename
    179751
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=822998