Аннотация:Nanocomposites based on anodic titanium oxide nanotubes with copper oxide nanoparticles were formed andtheir structural, optical, and electrophysical properties were studied. Defects in the structure of the samples wereidentified by electron paramagnetic resonance and it was shown that, as a result of copper oxide deposition, CuOnanoparticles were formed on the surface of nanotubes. It was found that the conductivity of the structure decreasesby several orders of magnitude with an increase in the number of deposition cycles. It was shown that this effectcould be associated with the formation of TiO2/CuO heterojunctions on the nanotube surface. It was shown forthe first time that an increase in the content of copper oxide in TiO2/Cux O nanocomposites was accompanied by adecrease in conductivity and an increase in the number of defects.