Metal microparticle, composition containing the same and process for producing metal microparticle

Metallmikropartikel, Zusammensetzung damit und Verfahren zur Herstellung eines Metallmikropartikels

Microparticule métallique, composition la contenant et procédé de production de microparticule métallique

Abstract

One object of the present invention is to provide metal fine particles which have selective wavelength absorption characteristics in a wavelength region from visible light to near infrared light, and have sharp absorption characteristics, and influences little the surrounding wavelength, and therefore, they yield tones having high chroma. The present invention provides a production method for producing metal fine particles by reducing metal ions in an aqueous solution containing a surfactant, wherein an aspect ratio of the metal fine particles is controlled by obtaining the metal fine particles under conditions in which an acid or alkali is added.

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