PROCESS FOR PRODUCING METAL NANOPARTICLE COMPOSITE FILM

摘要

A process for producing a metal nanoparticle composite film, in which the metal nanoparticle diameter and volume filling ratio of the metal nanoparticle composite film can be independently controlled. There is provided a process for producing a metal nanoparticle composite film having metal nanoparticles dispersed in a polyimide resin film, comprising the steps of (a) treating a polyimide resin film with an alkali aqueous solution to thereby attain introduction of carboxyl, (b) bringing the resin film into contact with a solution containing metal ions to thereby attain metal ion doping of the resin film and (c) performing thermal reduction treatment in a reducing gas, wherein the metal nanoparticle volume filling ratio of the composite film is controlled by regulating the thickness of nanoparticle dispersion layer formed in the polyimide resin film by the thermal reduction treatment in a reducing gas (c).