The Effect of the Properties of the Anion on the Process of Formation of a Copper Sol upon Reduction in a Solution of Poly(N-vinylpyrrolidone)

Copper sols are obtained by the chemical reduction of Cu(II) from the aqueous solutions of the salts in the presence of poly( N -vinylpyrrolidone). Copper chloride, sulfate, nitrate, and acetate act as the sources of the sol nanoparticles. The effect of the type of salt anion on the behavior of the polymer chain in diluted aqueous solutions of poly( N -vinylpyrrolidone) is studied. A decrease in the dispersion of the copper particles with respect to the sizes and a decrease in the average diameter of the nanoparticles obtained by the reduction of the salts in a solution of poly( N -vinylpyrrolidone) with the decrease in the volume of the anion and increase in its strength are found.