PREPARATION OF MONOLAYERS AND MULTILAYERS OF MIXED THALLIUM(III)-LEAD(IV)-OXIDES

Anodic depositions of mixed oxides of Tl2O3 and PbO2 from an alkaline thallium(I)-nitrate and lead(II)-nitrate electrolyte were prepared using different current densities. As can be seen from morphological examinations of the oxide surface, it is possible to achieve a homogeneous deposition. With increasing current density the lead/thallium ratio can systematically be increased. The structural analysis shows that at high current density the film exhibits an amorphous structure. Multilayers were produced by pulsed electrolysis. The reports of the literature on superlattice formation could not be confirmed under the experimental conditions applied.