Colloidal systems can be described as a bi- or multiphase systems, wherein the continuous phase (dispersion medium) is distinguish as well as the dispersed phase. Dimensionality of the dispersed matter is distributed in a range of several to several hundred nanometers. Colloidal systems are also known under the name of sols. Silver sols can be characterized by a specific electrical, optical and mechanical properties.

 Silver sols were prepared by reduction of silver bromide nanocrystals with the use of two different reducing agents: hydrochinone and pyrocatechol. Reactions were conducted in diverse environments to determine the optimum pH. Done were solutions necessary to obtain a suspension of silver bromide nanocrystals, then a Lippmann suspension in the darkroom was made. Diagram of apparatus used in the synthesis of Lippmann  suspension was presented on the Fig. 1. Photolytic reduction was performed on properly prepared samples of the photosensitive material using the aforementioned reducing agents. The evaluation of the reaction was carried out under the spectroscopy tests.

Literature:

K. Pigoń , Z. Ruziewicz, Chemia fizyczna. Tom , PWN, Warszawa, 1986

E.T. Dutkiewicz, Fizykochemia powierzchni, WNT Warszawa, 1998

A. Basiński, Zarys fizykochemii koloidów, Warszawa, 1957

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