Functional Multicomponent Metal Oxide Films Based on Sr, Sn, Fe, and Mo in the Anodic Alumina Matrices

Abstract

Low‐profile anodic alumina matrices of 1 μm thick with pore sizes of 105 and 160 nm are formed by two‐step anodizing of Al layers and are used as templates for the deposition of multicomponent metal oxide films on their surfaces. The metal oxide systems of Sr2FeMoO6−δ, FexMoyOz, and SnxMoyOz composites with carbon nanotubes are synthesized by electrophoretic deposition, sol–gel method, and drop method using aqueous salt solutions and are annealed at 373–473 K for 1–2 h and at 773–1123 K for 2–10 h. The morphology, microstructure, and composition of the porous alumina matrices with multicomponent metal oxides films are examined by scanning electron microscopy, energy‐dispersive X‐ray microanalysis, and X‐ray phase analysis. The use of anodic alumina matrices allows reducing the grain dimensions and gives uniformity to the microstructure and properties of the metal oxide films. The carbon nanotubes increase the working surface of the functional layer and its electrical conductivity. The variation in the synthesis conditions of deposited films and anodic alumina matrices configuration allows forming of different complex composition compounds with reproducible structure and properties.

A Micropowered Chemoresistive Sensor Based on a Thin Alumina Nanoporous Membrane and SnxBikMoyOz Nanocomposite

“…In the center of the membrane was a measuring element in the form of an interdigital capacitor, consisting of three pairs of electrodes 140 µm long, 20 µm wide, and with a gap of 15 µm between them. The gas-sensitive layer ( Figure 2 b) of Sn x Bi k Mo y O z was deposited on top of the electrodes by the ion layering technique ( Figure 2 c) [ 45 , 46 , 47 , 48 , 49 , 50 ].…”

Half-metallic double perovskite oxides: recent developments and future perspectives

“…Reprinted with permission. 206 Copyright 2019, Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. (e) EDS mapping for a section of the SFMO powders synthesized by the sol-gel method after the reduction process, where a uniform distribution of Sr, Fe and Mo atoms can be observed.…”

Spatially Ordered Matrix of Nanostructured Tin–Tungsten Oxides Nanocomposites Formed by Ionic Layer Deposition for Gas Sensing

“…At the same time, complex studies of spatially ordered tin-containing multicomponent metal oxide films by the SILAR method on structured substrates, in particular, on NAA matrices, for the nanostructured sensitive layers formation of gas sensors, have practically not been carried out. The data on the study of the specific features and mechanisms of the SILAR of metal oxides on the NAA matrices, based on the reactions of inner and outer-sphere complexes formation, are of great interest and open up the possibility of forming nanostructured films with a large active surface area, the properties of which can be controlled by varying their morphology and composition [ 25 ].…”