Synthesis of Copper Nanoparticles Using Hydrazine in Micellar Solutions of Sodium Dodecyl Sulfate

Abstract

The influence of the synthesis conditions and composition of the reaction medium on the size and morphology of copper nanoparticles is studied for the Cu(II)—N₂H₄–sodium dodecyl sulphate systems. In accordance with scanning electron microscopy, the nanoparticles size varies in the range of 30 to 90 nm at the average diameter of 40 to 45 nm and spherical shape of copper nanoparticles. The dimensions of copper nanoparticles are evaluated to be up to 400 nm. As shown via the spectrophotometry, the stabilization of copper dispersions resistant to oxidation, as well as their aggregation and sedimentation, occurs at Cu(II): N₂H₄ molar ratios of 1 : 100; 1 : 200, and 1 : 300 in sodium dodecyl sulphate micellar solutions. A hypsochromic shift of the surface plasmon resonance absorption band of copper is established to occur in the range of 574 nm–568 nm–564 nm with a change of the Cu(II): N₂H₄ molar ratio.