Method for producing precursor fine particles, method for producing ε-type ferric oxide fine particles, and precursor fine particles

Abstract

The present invention provides a method for producing precursor fine particles, a method for producing ε-type ferric oxide fine particles, and precursor fine particles, all of which offer improved manufacturability and quality stability. [Solution] The method for producing precursor nanoparticles is applicable to the production of ε-type ferric oxide nanoparticles and is characterized by comprising an irradiation step of irradiating a ferric salt in a solvent 5 with a femtosecond pulse laser to produce precursor nanoparticles P containing iron oxyhydroxide. The irradiation step may produce precursor nanoparticles P containing ε-type iron oxyhydroxide. The irradiation step may involve irradiating a ferric salt in a solvent 5 containing alcohol with a femtosecond pulse laser.

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