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

376 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

Fingerprint

Ferrosoferric Oxide
Magnetite
preparation
magnetite
Saturation magnetization
crystallinity
Particle size
Ultrafine
aqueous solutions
saturation
magnetization

Keywords

  • PVA
  • saturation magnetization
  • superparamagnetism
  • ultrafine magnetite particles

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry
  • Surfaces and Interfaces

Cite this

Preparation of ultrafine Fe3O4 particles by precipitation in the presence of PVA at high pH. / Lee, Jiwon; Isobe, Tetsuhiko; Senna, Mamoru.

In: Journal of Colloid and Interface Science, Vol. 177, No. 2, 10.02.1996, p. 490-494.

Research output: Contribution to journalArticle

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