Effect of the pН value on the synthesis of silver nanoparticles in an aqueous cysteine-silver solution
O.A. Baranova, S.D. Khizhnyak, P.M. Pakhomov
Tver State University, Tver, 1700002 Russia
Keywords: наночастицы серебра, супрамолекула, L-цистеин, просвечивающая электронная микроскопия, динамическое светорассеяние, silver nanoparticles, supramolecule, L- cysteine, transmission electron microscopy, dynamic light scattering
Abstract
Silver nanoparticles are synthesized in the medium of an aqueous cysteine-silver solution at different рН values using sodium borohydride as a reductant. By means of dynamic light scattering, electron spectroscopy, and transmission electron microscopy it is found that the size and stability of nanoparticles in this system depend on the рН value that is regulated by alkali and on the concentration of the cysteine-silver solution. Under certain conditions the unimodal distribution of silver nanoparticles with an average size of 40 nm are obtained.
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