Preparation of ultrafine Fe3O4 particles by precipitation in the presence of PVA at high pH

Jiwon Lee, Tetsuhiko Isobe, Mamoru Senna

Research output: Contribution to journalArticle

388 Citations (Scopus)

Abstract

Ultrafine magnetite particles of average diameter 4-7 nm were prepared by precipitation in a poly(vinylalcohol) (PVA) aqueous solution. Crystallinity of the particles decreased with increasing PVA concentration, while the morphology and particle sizes remained almost unchanged. The dispersion of the magnetite particles prepared at 1 wt% PVA was particularly stable. The saturation magnetization of the particles was above 50 emu/g, in spite of their small size and low crystallinity compared with conventionally prepared fine magnetite particles.

Original languageEnglish
Pages (from-to)490-494
Number of pages5
JournalJournal of Colloid And Interface Science
Volume177
Issue number2
DOIs
Publication statusPublished - 1996 Feb 10

Keywords

  • PVA
  • saturation magnetization
  • superparamagnetism
  • ultrafine magnetite particles

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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