Patent ID: 8459529

Claim:
A production method of composite silver nanoparticle comprising the steps of: arranging at least an alcohol solvent selected from alcohols with a carbon number of 1 to 12 composed of methanol, ethanol, propanol, buthanol, pentanol, hexanol, heptanol, octhanol, nonanol, decanol, undecanol and dodecanol, preparing an alcohol solution by mixing a silver salt into said alcohol solvent, added more excessively than the mol number of said silver salt so as to become an excess alcohol solution, heating said excess alcohol solution in a reaction chamber at a generation temperature PT generating an aldehyde for a generation time, forming a silver core through reducing of said silver salt by said alcohol solvent and/or said aldehyde, and forming a composite silver nanoparticle having an organic coating layer originated from said alcohol solvent around said silver core.