Patent ID: 8834965
Filing Date: 2014-09-16
Classification: B22F,B82Y,Y10S,Y10T

Abstract:
1. A process for producing organoamine-stabilized silver nanoparticles, comprising: forming a heated solution at a first temperature comprising an organic solvent and a first amount of organoamine; adding silver salt particles to the heated solution; adding a second amount of organoamine to the heated solution containing the organic solvent, first amount of organoamine, and the silver salt particles, wherein the weight ratio of the first amount of organoamine to the second amount of organoamine is about 1:1; cooling the heated solution to a second temperature that is lower than the first temperature; adding an organohydrazine to the heated solution containing the organic solvent, first amount of organoamine, silver salt particles, and the second amount of organoamine; and reacting the solution containing the organic solvent, first amount of organoamine, silver salt particles, second amount of organoamine, and organohydrazine to form organoamine-stabilized silver nanoparticles; wherein the organoamine is hexadecylamine, the silver salt is silver acetate, and the organic solvent is toluene; wherein the organoamine-stabilized silver nanoparticles have a silver content of 81 wt % to 84 wt %; and wherein when a film is made by annealing a solution containing the organoamine-stabilized silver nanoparticles and having a shelf life of 30 days or more at 140° C. for 10 minutes, the film has a conductivity of from 27560 S/cm to 29350 S/cm.