In<Subscript>0.22</Subscript>SnS<Subscript>0.33</Subscript>(OH)<Subscript>4</Subscript> nanolayers synthesized by the layer-by-layer technique

The possibility of the synthesis of In_0.22SnS_0.33(OH)₄ nanolayers on the silica surface by the layer-by-layer technique was demonstrated. The synthesized layers were studied by ellipsometry, X-ray spectral microanalysis, and electronic and IR Fourier spectroscopy.     

Ozone interaction with manganese acetate solution. Formation of H x MnO2·nH2O layers and microtubes based on them

We present the first study of Mn(II) cations interaction with ozone fed onto the air/aqueous manganese acetate solution boundary. In the reaction, the layer of H _x MnO₂·nH₂O of birnessite structure has been formed at the surface. Subsequent ～1–3 μm thick layers drying at air has led to their rolling up to form microtubes with diameter of 20–50 μm and up to 10 mm long.     

Layer-by-layer synthesis and study of nanostructured Pb<Subscript>4</Subscript>SbS<Subscript>6.5</Subscript> layers

Conditions for the layer-by-layer synthesis of nanostructured Pb₄SbS_6.5 layers on a silica surface, using reagent solutions, were determined. The synthesized layers were studied by X-ray photoelectron spectroscopy, UV and visible transmission spectroscopy, X-ray spectral microanalysis, and scanning electron microscopy.     

Layers of <Emphasis Type="Italic">x</Emphasis>CuS-SiO<Subscript>2</Subscript>·<Emphasis Type="Italic">n</Emphasis>H<Subscript>2</Subscript>O nanocomposite,synthesized by the layer-by-layer technique

For the first time conditions were determined for the synthesis of Cu _x SiO_2+x ·nH₂O nanostructured layers by consecutive adsorption of copper ammine cations and adagulation of colloidal SiO₂ particles and also for the synthesis of xCuS-SiO₂·nH₂O nanocomposite layers by consecutive surface adsorption of copper cations and HS^? anions. These layers were studied by means of UV and visible transmission spectroscopy, X-ray spectral microanalysis, and scanning electron microscopy. Schemes of the surface reactions were constructed on the basis of this experimental material.     

Silver nanoribbons synthesized on a silicon surface by the “layer-by-layer” technique

Conditions for the synthesis of silver nanoribbons on a silicon surface by the “layer-by-layer” technique were determined for the first time. The synthesized structures were studied by scanning electron microscopy, energy-dispersion microanalysis, and X-ray diffraction. A conclusion on the sequence of possible reactions occurring on the surface during the synthesis was drawn on the basis of the experimental data.     

Photoluminescence of porous silicon coated by SILD method with LaF3 nanolayers

The method of lanthanum fluoride passivating layer synthesis in the matrix of porous silicon by successive ionic layer deposition was elaborated and optimized. Luminescence and FTIR of obtained structures demonstrate the crucial role of the chemical composition of silicon nanocrystallite surface in the formation of radiative recombination channels and in the stability of porous silicon photoluminescence. The combination of high optical transparency of LaF₃ layers and low recombination losses in silicon covered with such layers allows to recommend the lanthanum fluoride film as an effective passivating coating for silicon optoelectronics devices.     

Thin layers formed by the oriented 2D nanocrystals of birnessite-type manganese oxide as a new electrochemical platform for ultrasensitive nonenzymatic hydrogen peroxide detection

Journal of Solid State Electrochemistry - Thin layers formed by the arrays of the vertically oriented 2-dimensional nanocrystals of Birnessite-type manganese oxide CuxMnO2∙nH2O were...     

Reaction of gaseous hydrogen fluoride with the surface of lanthanum chloride solution to form LaF3·nH2O film and microtubes thereof

We present the first study of the reaction of hydrogen fluoride fed from the air side of the air/LaCl₃ aqueous solution interface with lanthanum cations. The reaction yields a 0.5–1.5-μm LaF₃·nH₂O surface film with hexagonal crystal structure, built of the ordered planar LaF₃·nH₂O nanocrystals (the crystal thickness of 7–15 nm and surface area of 0.5–2.5 μm²). The nanocrystals are oriented perpendicular to the interphase boundary, and their packing gets looser towards the solution side of the film. Upon drying in air, the LaF₃·nH₂O film rolls up to form microtubes 20–100 μm in diameter and up to 2 mm long. The microtubes are likely formed due to the contraction forces developing upon drying in the lower, loosest part of the wet film.     

Synthesis and study of cerium(IV) polytungstate nanolayers

For the first time the conditions for the synthesis of cerium(IV) polytungstate nanolayers on the silicon surface by the method of ion layering were defined. The layers were studied by scanning electron microscopy, X-ray microanalysis and transmission FT-IR spectroscopy. The synthetized layer is shown to have a globular structure with the size of the globules in the range of 30–50 nm, with the ratio of cerium/tungsten atomic concentrations equal to 0.8.     

Synthesis on Silica Surface by the Ionic Deposition Technique of Nanolayers of Heteropolycompounds on the Basis of Phosphomolybdic Acid

Layers of a hybrid iso- and heteropolycompound of the composition Zr_2.6(OH) _x PMo_8.0Sn_{1.9O y} · nH₂O were obtained on silica surface by ionic deposition. Heating in air at 200-400°C results in removal from the layer of water molecules, oxidation of Mo⁵⁺ to Mo⁶⁺, and formation of Mo-O-Zr and Mo-O-Sn chemical bonds.