Dispersion colloid and radiocolloid-modified electrodes: electroaggregation of silver radiosol.

Silver sols and radiosols have been prepared using NaBH4 reduction and Agions radiolabeled with (110) Ag-m isotopes. The electroaggregation of the p articles on polycrystalline gold electrode studied by the so-called "foil" in-situ radiotracer method was described. For the purpose of the combined r adiochemical and electrochemical new beta-plastic dE/dX detector was develo ped. Experimental results of time and potential dependence of electroattach ment-detachment processes, the surface excess concentration as a function o f the electrode potential used, the "mobility" of the particles deposited h ave been presented and discussed. These results may give some new contribut ions to the research field of colloid-modified electrodes and to the best o f our knowledge the radioelectrochemical investigation of the colloid stabi lity is unique in the literature.