Novel methods for the synthesis of magnetite nanoparticles with special morphologies and textured assemblages

Ilona Nyiro-Kosa, Aleksander Rečnik, Mihály Pósfai

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

There is an increasing technological demand for magnetic nanocrystals with special morphologies and controlled sizes. Several approaches are used for the synthesis of magnetite crystals with irregular or octahedral shapes; however, the roomtemperature synthesis of nanocrystals with specific morphologies is not yet established. Here, we describe the synthesis of magnetite crystals (100-300 nm) at a relatively low temperature (̃70 °C) from organic precursors, including Fe(II) oxalate or Fe(II) sulfate, and study the effects of ethylene glycol and tetraethylene glycol on the final physical and chemical properties of the crystals. The magnetite crystals formed from different precursor materials (sulfate or oxalate green rust) show specific morphological and textural features. We show that octahedral magnetite crystals can be produced from Fe(II) oxalate via a simple co-precipitation process. Using different kinds and amounts of polyols, various types of particle morphologies and nanocrystal textures can be produced, including hexagonal-shaped clusters of elongated crystals and porous and solid, large, rounded polycrystalline aggregates.

Original languageEnglish
Article number1150
JournalJournal of Nanoparticle Research
Volume14
Issue number10
DOIs
Publication statusPublished - Sep 26 2012

Keywords

  • Low-temperature precipitation
  • Magnetite
  • Special morphology
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics

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