Single Crytalline Noble Metal Ultrathin-Film-Like Nanoparticle Formed in Adsorbed Micelle Film as Reaction Filed Formed at Solid-Liquid Interface, and Production Method Thereof

A production method of a single crystalline noble metal ultrathin-film determinate-form nanoparticle, characterized in that the method comprises the steps of:

• preparing a micelle forming solution containing one kind or two kinds of surfactants at a micelle concentration;
• subsequently immersing a carrier substrate into the micelle forming solution, to cause a micelle formed in a rod-like shape having a semicircle cross-section to be formed on and immobilized to the carrier substrate;
• subsequently adding a solution containing a noble metal ion into the micelle to thereby contain the noble metal ion within the micelle;
• and
• subsequently causing a reducing agent to act on the micelle containing therein the metal ion to thereby progress a reductive reaction within the immobilized micelle as a reaction field, to produce a single crystalline noble metal ultrathin-film determinate-form nanoparticle exhibiting a thin-film shape having a thickness in a range of 2 to 5 nm and having an arbitrary contour selected from a shape of disk, rod, plate, and sheet, by utilizing the immobilized micelle as a template.