Synthesis of Fe3O4 nanoparticles with various sizes and magnetic properties by controlled hydrolysis

Hironori Iida, Kosuke Takayanagi, Takuya Nakanishi, Tetsuya Osaka*

*この研究の対応する著者

研究成果: Article査読

358 被引用数 (Scopus)

抄録

Nanoparticles of Fe3O4 were synthesized by hydrolysis in an aqueous solution containing ferrous and ferric salts at various ratios with 1,6-hexanediamine as a base. It was found that the ferrous to ferric ratio influences the reaction mechanism for the formation of Fe3O4. When the ratio of ferrous to ferric ions was increased, the formation of large hydroxide particles as a precursor of Fe3O4 was promoted, which resulted in an increase in the size of Fe3O4 nanoparticles. As a result, the mean diameter of Fe3O4 nanoparticles increased from ∼9 to ∼37 nm as the molar percentage of ferrous ions with respect to the total iron ions was increased from 33 to 100%. Furthermore, it was demonstrated that magnetic properties of Fe3O4 nanoparticles can be controlled by adjusting the molar ratio of ferrous to ferric ions as well as the particle diameter.

本文言語English
ページ(範囲)274-280
ページ数7
ジャーナルJournal of Colloid And Interface Science
314
1
DOI
出版ステータスPublished - 2007 10 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 生体材料
  • 表面、皮膜および薄膜
  • コロイド化学および表面化学

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