Size control of magnetite nanoparticles by organic solvent-free chemical coprecipitation at room temperature

Tomohiro Iwasaki, Naoya Mizutani, Satoru Watano, Takeshi Yanagida, Tomoji Kawai

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

This study provides a facile single-step coprecipitation method for preparing size-controlled high crystalline magnetite nanoparticles in water system without using any organic solvents. In this method, an iron ions solution and an alkaline solution are simply mixed at room temperature without using any additional heating treatment. The size of obtained magnetite nanoparticles greatly depended on the coexisting anionic species in the starting solution because the coexisting anions greatly influenced both the formation of crystal nuclei and the dispersion stabilisation of formed precipitates. The size control of magnetite nanoparticles having high crystallinity and ferromagnetic property could be successfully achieved by using the effects of coexisting anions. For synthesising finer magnetite nanoparticles, the presence of lactate ion in the starting solution was effective, and coarser ones could be synthesised under higher ferrous/ferric ions molar ratios.

Original languageEnglish
Pages (from-to)251-262
Number of pages12
JournalJournal of Experimental Nanoscience
Volume5
Issue number3
DOIs
Publication statusPublished - Jun 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biomedical Engineering
  • Materials Science(all)

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