Conductive ink compositions and methods for preparation of stabilized metal-containing nanoparticles

A conductive ink composition comprising:

• a plurality of stabilized metal-containing nanoparticles comprising silver or a silver alloy composite, wherein the silver or silver alloy composite is coated with a stabilizer comprising an organoamine present in an amount ranging from about 3 weight percent to about 60 weight percent including only the stabilized metal-containing nanoparticle and the stabilizer,
• at least one ink vehicle comprising an aliphatic hydrocarbon,
• two or more solvents having different evaporation rates, and
• a mixture of resins comprising terpene, polyvinyl alcohol derivative resins, polybutene, ethylene vinyl acetate-maleic anhydride terpolymers, and at least one other resin comprising styrene block copolymers, ethylene-vinyl acetate copolymers, ethylene butyl acrylate copolymer, ethylene-acrylic acid copolymer, polyolefins, or polyamides, the mixture of resins present in an amount of from about 0.1 to about 3 percent by weight of the total weight of the conductive ink composition,
• wherein the plurality of stabilized metal-containing nanoparticles are dispersed in the ink vehicle,
• wherein the stabilized metal-containing nanoparticles are prepared by a first method comprising reacting a silver compound with a reducing agent comprising a hydrazine compound by incrementally adding the silver compound to a first mixture comprising the reducing agent, the stabilizer comprising the organoamine, and a solvent,
• wherein the ink composition comprises greater than about 15 weight percent silver, and
• wherein the two or more solvents comprise
• a first solvent selected from the group consisting of terpineol;
• hexanol;
• heptanol;
• cyclohexanol;
• 3,7-dimethylocta-2,6-dient-1 ol;
• and 2-(2-propyl)-5-methyl-cyclohexane-1-ol, and
• at least one of a second solvent selected from the group decalin;
• hexadecane;
• hexadecane;
• 1,2,4-trimethylbenzene;
• bicyclohexane and mixtures thereof.