Use of liquid-liquid interface for synthesis of maghemite nanocrystals

Abstract

Nanocrystals of maghemite (?-Fe 2O 3) have been prepared at the interface of organic-aqueous layer by the reaction of ferric acetylacetonate in toluene with sodium hydroxide in aqueous solution. The nanocrystals of ?-Fe 2O 3 formed at the interface of the organic-aqueous layer have been confirmed by X-ray diffraction (XRD) pattern. The sample has been characterized morphologically by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and atomic force microscopy (AFM) techniques. Magnetic hysteresis loop and zero-field cooling measurements exhibited superparamagnetism behavior for ?-Fe 2O 3 nanocrystals. © 2012 World Scientific Publishing Company.