A novel approach for preparation of γ-Fe2O3 nanoparticles: Successive reduction-oxidation in reverse micelles

Hironori Iida*, Harumi Takada, Takuya Nakanishi, Tetsuya Osaka

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A novel approach for the preparation of γ-Fe2O3 nanoparticles based on successive reduction-oxidation in reverse micelles is reported. In this method, γ-Fe2O3 nanoparticles are formed via chemical reduction of ferrous or ferric ions by a reducing agent such as NaBH4, N2H4, or NaH2PO 2, followed by successive oxidation in reverse micelles. The generation of nanoparticles is caused by the "electroless deposition" in reverse micelles, and it was found that the crystal structure and the magnetic properties of the products depend on the redox potential of the reducing agent and the catalytic activity of the metal surface. In the case using NaBH4 as a reducing agent, highly crystalline γ-Fe 2O3 nanoparticles were successfully synthesized.

Original languageEnglish
Title of host publicationMagnetic Materials, Processes, and Devices VIII - Proceedings of the International Symposium
Number of pages5
Publication statusPublished - 2006 Dec 1
Event206th ECS Meeting - Honolulu, HI, United States
Duration: 2004 Oct 52004 Oct 8

Publication series

NameProceedings - Electrochemical Society
VolumePV 2004-23


Conference206th ECS Meeting
Country/TerritoryUnited States
CityHonolulu, HI

ASJC Scopus subject areas

  • Engineering(all)


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