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Article
Structure and Properties of SiO x Films Prepared by Chemical Etching of Amorphous Alloy Ribbons
The structure and the physical properties of amorphous SiO x films prepared by chemical etching of an iron-based amorphous ribbon alloy have been studied. The neutron diffractio...
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Article
Interaction of hydrofullerite C60H42 with air
The transmission and Raman spectra of C60H42 samples synthesized at a high hydrogen pressure and stored under different conditions have been measured. It has been found that, upon interaction of the compound with...
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Article
Properties of a composite material based on multi-walled carbon nanotubes and an ionic liquid
A solid-phase composite material based on multi-walled carbon nanotubes and an ionic liquid (1-butyl-3-methylimidazolium hexafluorophosphate) has been synthesized. It has been found using infrared spectroscopy...
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Article
Fullerit C60 single crystals grown on earth and in space
Fullerit C60 single crystals were grown by sublimation on Earth and under microgravity during the FOTON-M3 mission using the same growth parameters and the same multizoned electrovacuum POLIZON-M furnace. IR spec...
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Article
Synthesis of a periodic SiC/C nanostructure
Highly porous periodic structures consisting of a three-dimensional replica of pores in the initial opal lattice have been synthesized by high-temperature thermochemical treatment of opal matrices filled with ...
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Article
Structural ordering upon annealing of europium molybdate subjected to pressure treatment
It has been found that treatment of europium molybdate single crystals under high uniform pressure leads to radical changes of the IR reflectance spectra of the samples. Instead of a series of narrow lines, wh...
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Article
The memory effect in Eu2(MoO4)3 single crystals exposed to high hydrostatic pressure
The influence of high-pressure hydrostatic compression and subsequent annealing on the structural properties of β’-phase single crystals of europium molybd ate was studied by IR spectroscopy and X-ray diffract...
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Article
Three-dimensional periodic lattice of ZrO2 nanocrystals in transparent silica matrix
The conditions for synthesizing an opal-zirconia-carbon nanocomposite in the form of monolithic (without pores) transparent silica with an ordered distribution of nanocrystals throughout the sample have been d...
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Article
Growth of ZnO nanocrystals by pulsed laser deposition on sapphire and silicon and the infrared spectra of the nanocrystals
The ZnO nanorods that comprise highly oriented nanorod structures are grown on sapphire and silicon substrates by laser ablation. The nanostructures grown in different conditions are characterized by means of ...
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Article
Oriented ZnO nanorods and their IR reflection spectra
Oriented ZnO nanorods have been grown on sapphire and silicon substrates by pulsed laser deposition. It is established that IR spectroscopy gives information about the crystal structure of nanorods, their cond...
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Article
Synthesis of α-SiC nanocrystals by carbothermal reduction of spherical nanoparticles of amorphous silicon dioxide
The method for carbothermal reduction of spherical particles of amorphous silicon dioxide is developed, and hexagonal α-SiC polytype nanocrystals are synthesized. The prepared samples are characterized by X-ra...
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Article
IR study of the pressure-induced amorphization and recrystallization of europium molybdate
Drastic changes of the IR spectra of optical phonons in europium molybdate single crystal were observed after its hydrostatic compression: instead of a series of narrow lines, wide bands were observed and a ne...
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Article
Influence of high-temperature treatment on the structure and emission properties of opal doped with erbium
The influence of high-temperature treatment of opal—erbium composites on their spectral properties in the wavelength region of 1.5 μm is investigated, the dependence of the luminescence intensity on the erbium...
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Article
Optical phonon spectra of lutetium fluoride, oxyfluoride, and lutetium oxide nanoparticles
Nano-and microcrystalline LuF3 phases have been synthesized with particle sizes of 30 nm and 30 μm, respectively. Analysis of the IR reflection spectra measured at T = 300 K showed that the nanophase differs from...
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Article
Electronic and vibrational spectra of a gel of single-wall carbon nanotubes in an ionic liquid
A gel of single-wall carbon nanotubes in an ionic liquid has been prepared using the technique of mixing nanotubes with ionic liquids. The gel obtained has a high concentration of nanotubes (∼1%). The absorpti...
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Article
Effect of hydrogenation on the spectra of electronic and vibrational transitions in single-walled carbon nanotubes
Single-walled carbon nanotubes containing 5.4 wt% H are prepared under a hydrogen pressure of 50 kbar at the temperature T = 500°C. Analysis of the optical transmission spectra has revealed that the hydrogenation...
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Article
Ultraviolet luminescence of ZnO infiltrated into an opal matrix
Technology for the infiltration of zinc oxide into a three-dimensional opal lattice using chemical deposition from a solution was developed. Samples of ZnO-opal composites, whose luminescence at room temperatu...
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Article
Thermally stable hydrogen compounds obtained under high pressure on the basis of carbon nanotubes and nanofibers
Compounds containing 6.3–6.5 wt % H and thermally stable in vacuum up to 500°C were obtained by annealing graphite nanofibers and single-walled carbon nanotubes in hydrogen atmosphere under a pressure of 9 GPa...
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Article
Optical properties of thin films of closely packed SiO2 spheres
Ordered, closely packed, defect-free one-, two-, and three-layer thick films of SiO2 spheres of diameter D varying from 0.6 to 1.4 µm were obtained. Their optical transmittance and reflectance spectra were measur...
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Article
Optical Characteristics of C60 Single Crystals Grown in Microgravity Conditions
This work is devoted to the growing and characterization of perfect C 60 single crystals with the aim of further understanding of the physical properties of this material relate...