Coulometric Titration of Micro-and Nanocrystalline Silver Sulfide

摘要

Using coulometric titration, the nonstoichiometry of micro- and nanocrystalline Ag2+ (low- temperature phase) is studied as a function of particle size and temperature. The samples are preparedby mechanical ball milling and by precipitation using reverse micelles to obtain particles with narrowsize distribution. The nonstoichiometry, the thermodynamic factor, the energy for the formation ofelectron-hole defects and the concentration of the quasi-free electrons are computed, and the electronicconductivity is measured.