COMPARISON OF SELF-ORGANIZATION PROCESSES IN AQUEOUS SOLUTIONS OF L-CYSTEINE AND N-ACETYL-L-CYSTEINE WITH SILVER NITRITE
Using the methods of UV spectroscopy, dynamic light scattering (DLS) and scanning electron microscopy (SEM) in aqueous solutions of L-cysteine and N-acetyl-L-cysteine (NAC) add silver nitrite (AgNO2) at different concentration from 0.001 to 0.025 M the processes of self-organization leading to the formation of a hydrogel have studied in various ratios of the initial components. It has found that for solutions based on L-cysteine and AgNO2 (cysteine-silver solution - CSS) with a concentration of initial components of 0.025 M form stable hydrogels containing silver nanoparticles (SNPs). At the same time, solutions based on NAC and AgNO2 are unable to form gels and SNPs. The regularities and conditions influencing the process of gel formation have been determined, which made it possible to propose a mechanism of gelation in the CSS.