Method for manufacturing metal nanoparticles and method for manufacturing metal nanoparticle ink by same

Example 1

Preparation of Nm Nanoparticles Having an Average Particle Size of 3 to 10 nm

[0051]Synthesis of Ag Precursor

[0052]1.7 g of 2-methyl heptanoic acid was put into a 250 ml flask, and dissolved in 84 ml of a polar organic solvent, THF, and 2.7 g of NEt3 was added as a base. Thereafter, 1.4 g of AgNO3 was put into another 250 ml flask, and dissolved in 84 ml of THF. The AgNO3 solution was slowly dropped in the 2-methyl heptanoic acid solution at a rate of 800 ml / hr while vigorously stirring. The mixed solution in which addition of the AgNO3 solution was completed was stirred for 20 minutes, and a precipitate was separated, washed twice with an organic solvent (THF), and then dried to form 2.0 g of a Ag precursor (Ag-2-methyl heptanoate).

[0053]Preparation of Ag Nanoparticles

[0054]0.6 g of the Ag-2-methyl heptanoate was dissolved in 5.2 g of THF. Thereafter, 0.6 g of NEt3 was added as the base, and stirred to enhance solubility. The resulting reaction solution was subjected to supe

Example 2

Preparation of Nm Nanoparticles Having an Average Particle Size of 20 to 50 nm

[0055]Synthesis of Ag Precursor

[0056]A Ag precursor was prepared in the same manner as in the synthesis of the Ag precursor synthesized in Example 1.

[0057]Preparation of Ag Nanoparticles

[0058]0.6 g of the Ag-2-methyl heptanoate was dissolved in 2.2 g of THF and 0.6 g of NEt3. Thereafter, the resulting reaction solution was subjected to supersonic waves for an hour while heating at 60° C. to prepare Ag nanoparticles having an average particle size of 30 nm. The reaction solution was then separated by centrifugation, and the residual solvent was removed to prepare 0.2 g of Ag nanoparticles.

Example 3

Preparation of Nm Nanoparticles Having an Average Particle Size of 50 to 200 nm

[0059]Synthesis of Ag Precursor

[0060]A Ag precursor was prepared in the same manner as in the synthesis of the Ag precursor synthesized in Example 1.

[0061]Preparation of Ag Nanoparticles

[0062]0.6 g of the Ag-2-methyl hexanoate was dissolved in 2.2 g of THF and 0.6 g of NEt3. Thereafter, the resulting reaction solution was stirred at 60° C. for 1 to 2 hours to prepare Ag nanoparticles having a particle size distribution of 100 nm. The reaction solution was then separated by centrifugation, and the residual solvent was removed to prepare 0.2 g of Ag nanoparticles.

[0063]The Ag nanoparticles prepared in Examples 1 to 3 were photographed under a scanning electron microscope (SEM) to calculate an average particle size from particle sizes of 500 nanoparticles whose particle sizes were able to be identified.