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Article
The use of liquefied gas in soaking pits
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Chapter
Infrared Reflectivity, Inelastic Light Scattering and Energy Gap in a Y-Ba-Cu-O Superconductors
Below 93K the spectra of FIR reflection and inelastic light scattering of Y-Ba-Cu-O samples reveal the peculiarities related with superconducting gap and optical phonons. The magnitude of the gap is found to be 2...
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Article
Deformation Welding Of Scintillating Materials
Experiments on connecting scintillating crystals to form homogeneous pieces by means of plastical deformation are described. Optical transmission, radiation hardness, and scintillation spectra have been used f...
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Article
Activation of Lead Fluoride Room Temperature Luminescence by Structural Modifications
The connection of lead fluoride luminescence properties with its structural characteristics has been studied. Single crystals of the cubic and orthorombic phases, cubic and orthorombic powders, pressure compac...
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Article
Spectra of optical phonons and low-energy electronic transitions in C60/TMPD and C60/TPA single crystals
Single Crystals of C60/TMPD and C60/TPA have been grown from a chlorobenzene solution. Optical transmission spectra of single crystals of fullerene complexes withN,N,N′,N′-tetramethyl-p-phenylenediamine (TMPD) an...
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Article
Photoinduced light absorption by C60 films in the 0.08–4.0-eV spectral range
Spectra of photoinduced light absorption in C60 films at high and low excitations in the temperature range between 15 and 300 K have been measured. In addition to the well-known explanation of photoinduced absorp...
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Article
Long-term evolution of photoinduced light absorption in C60 films
It is found that photoinduced absorption in the energy range 0.6–2.1 eV in C60 films grown by the same method can differ by a factor of 100. This change is attributable a 106-fold increase in the relaxation time
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Article
Effects of Lattice Distortion, Polaron Conduction and Double-Exchange Interaction on the Physical Properties of Magnetoresistive Manganites and Cobaltites
The relevance of lattice distortion, polaron conduction, and double-exchange interaction to the occurrence of colossal magnetoresistance (CMR) is investigated by comparing the physical properties of magnetores...
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Article
Raman scattering of light and IR absorption in carbon nanotubes
Raman light scattering and IR absorption spectra of samples containing multilayer carbon nanotubes in different stages of purification by the selective oxidation technique have been investigated. It was found ...
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Article
Reciprocal inhibition of the AMPA and NMDA components of excitatory postsynaptic potentials in field CA1 of the rat hippocampus in vitro
The mutual effects of components of excitatory postsynaptic potentials (EPSP) induced by activation of glutamate receptors sensitive to α-amino-3-hydroxy-5-methyl-4-isoxazole-propionic acid (AMPA) and N-methyl...
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Article
Electronic properties of C60 single crystals doped with lithium by electrodiffusion
Diffusion of lithium cations in C60 single crystals driven by electric field has been detected and studied. A novel technique for fullerene crystal do** based on injection of ions through a “superionic crystal/...
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Article
Optical phonon spectra of PbF2 single crystals
The spectra of dipole-active optical phonons are measured for the cubic and orthorhombic phases of PbF2 single crystals. The frequencies and eigenvectors of normal modes in the Pnma orthorhombic phase are calcula...
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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...
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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
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
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
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
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
Fullerite with intercalated freon Ch2F2
Fullerite C60 with intercalated CH2F2 (Freon-32) was prepared for the first time. The sample was studied by elemental analysis, X-ray powder diffraction, mass spectrometry, and IR spectroscopy. The composition of...
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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...
