Induction Time in Formation of Copper Nanoparticles

Copper nanoparticles are synthesized by the reaction of cupric chloride with hydrazine in the aqueous cetyltrimetylammonium bromide (CTAB) solution. Induction time is estimated by two ways, one from an absorption-time graph obtained by monitoring the absorption of solution after creation of supersaturation by UV-vis spectrum and by visual observation of color alterations. An analogy test has been performed for comparison of these ways with accuracy of 95% . Whereas experimental data was in concord with classical nucleation theory, this theory is used for calculation of interfacial tension. Correlations related to classical nucleation theory are compared with each other and two equations for calculation of interfacial tension.