For the first time, one-dimensional phase-modulated structures consisting of two different layered Aurivillius phases with alternating five and six perovskite-like layers were obtained by atomic layer deposition (ALD) on the surface of TiO2 nanotubes (Nt). It was shown that the use of vertically oriented TiO2 Nt as the substrate and the ALD technology of a two-layer Bi2O3-FeOx sandwich-structure make it possible to obtain a layered structure due to self-organization during annealing. A detailed study by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that the coating is conformal. Raman spectroscopic analysis indicated the structure of the layered Aurivillius phases. Transient photocurrent responses under Ultraviolet-Visible (UV-Vis) light irradiation show that the ALD coating benefits the efficiency of photon excitation of electrons. The results of the photoelectrocatalytic experiments (PEC) with methyl orange degradation as a model demonstrate the significant potential of the synthesized structure as a photocatalyst. Photoluminescent measurement showed a decrease in the probability of recombination of photogenerated electron-hole pairs for ALD-coated TiO2 Nt, which demonstrates the high potential of these structures for use in photocatalytic and photoelectrochemical applications.

Central European Institute of Technology BUT Purkyňova 123 61200 Brno Czech Republic

Department of Inorganic Chemistry and Chemical Ecology Dagestan State University st M Gadjieva 43 a Dagestan Republic 367015 Makhachkala Russia

Department of Physics Faculty of Electrical Engineering and Communication Brno University of Technology Technická 2848 8 61600 Brno Czech Republic

Nanosciences African Network 1 Old Faure Road 7129 P O Box 722 Somerset West 8000 South Africa

School of Environmental Science and Engineering Shaanxi University of Science and Technology Xi'an 710021 China

UNESCO UNISA Africa Chair in Nanoscience's Nanotechnology Laboratories College of Graduate Studies University of South Africa Muckleneuk Ridge P O Box 392 Pretoria 0003 South Africa

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Multiferroic/Polymer Flexible Structures Obtained by Atomic Layer Deposition