Home – Home – Jornals – Chemistry for Sustainable Development 2008 number 3

Chemical substances existing in the finely dispersed phase state (as small aerosol particles 0.1-10 μm in diameter and as very thin films with a thickness of 0.01-1 μm) exhibit specific chemical and physicochemical properties. The processes characteristic of these substances are essentially different from the processes in relatively coarsely dispersed aerosol and thick films, and even more different from the reactions taking place in usual liquid or solid solutions. This specificity is connected with the fact that the rate of evaporation, solidification and layering of a dispersed substance exhibits a reciprocal square dependence on the size of dispersed particles. In turn, this causes essential differences in the volume structures of the chemical material for fine- and coarse-dispersed objects and therefore different mechanisms of chemical reactions occurring in them.