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Article
Photoelectron Properties of Multi-Walled and Single-Walled Titania a Nanotubes
Fluorescence, conductivity, photocatalysis, and photoinduced reactions of defects in titanium dioxide (TiO2) nanotubes of various morphologies (single-walled and multi-walled) were studied. It has been establishe...
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Article
Improving the Photoluminescence Properties оf CdSe, CdSe/CdS Semiconductor Quantum Dots for Making Solid-State Laser Active Media
The properties of CdSe, CdSe/CdS quantum dots in different reaction media are investigated. The effect of the reaction medium, duration and synthesis temperature exerted on the photoluminescence properties of ...
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Article
Structure and Properties of Polycrystalline TiO2-Doped with Chromium Ions Studied by EPR and Optical Methods
Paramagnetic centers (PCs) of Ti3+ and Cr3+ were detected in polycrystalline Cr-doped TiO2 (rutile) semiconductors in which the chromium content varied from 0.1 to 1.7 at.%. For the first time, the energy positio...
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Article
Release of TRITC-Dextran from Composite Microcapsules under the Influence of a Low-Frequency Alternating Magnetic Field
Composite microcapsules based on polyelectrolytes and nanoparticles of iron oxides are synthesized, and the release of encapsulated high-molecular dextran under the influence of a low-frequency alternating mag...
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Article
Development of Composite Iron Oxide Fluorescent Nanoparticles for Nondestructive Magnetic Particle Testing
A method has been developed for modifying the surface of iron oxide nanoparticles with a fluorescent dye based on fluorescein. It is shown that iron oxide nanoparticles chemically bind with a fluorescein deriv...
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Article
Photoaccumulating Nanoheterostructures Based on Titanium Dioxide
Nanoheterostructures based on titanium dioxide synthesized by the sol–gel technique are studied. Microscopy, X-ray diffraction, optical spectroscopy, and electron-spin resonance techniques are used. All the in...
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Article
Photoluminescence of CdSe and CdSe/ZnS Quantum Dots in Amorphous and Liquid-Crystalline Polymer Matrices
The influence of the structure of the polymer matrix on the main photoluminescence characteristics of composites based on core (CdSe) and core–shell type (CdSe/ZnS) quantum dots embedded in liquid-crystalline ...
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Article
The Influence of a Low-Frequency Magnetic Field on Polyelectrolyte Capsules with Magnetite Nanoparticles
Polyelectrolyte microcapsules have been prepared by successively adsorbing oppositely charged sodium polystyrenesulfonate and polyallylamine hydrochloride molecules on the surface of calcium carbonate colloid ...
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Article
The Effect of Spin Center Parameters on the Photoactivity of Nanocrystalline Titanium Dioxide in the Visible Spectral Range
Nanocrystalline TiO2 samples, obtained by sol–gel and supercritical fluid (SCF) methods, have been studied by optical spectroscopy and electron spin resonance. It is established that the main type of spin centers...
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Article
High Photocatalytic Activity Nanomaterials Based on Titanium Dioxide
Abstract—X-ray diffraction, optical spectroscopy, and electron paramagnetic resonance (EPR) have been used to study microspheres and nanoheterostructures based on titanium dioxide synthesized by aerosol pyrolysis...
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Article
The Optical Properties of Polydisperse Glass Microsphere Ensembles in the Infrared Spectral Region
Semitransparent composites with glass microspheres are promising modern materials. In particular, they contribute to the increase of the efficiency of heat-insulating coatings. An experimental study of the tra...
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Article
Effect of the texture of Langmuir copolymer films on structural phase transitions
An atomic-force microscopy study has surprisingly revealed that ultrathin copolymer films fabricated according to Langmuir technology constitute a network of tangled filaments. A long-range order is absent in ...
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Article
Effect of the synthetic procedure on the properties of thin films of liquid crystals
Liquid-crystal films prepared by different procedures and having different thicknesses were studied. A structural phase transition was found in these films at ∼75°C. The nature of this transition was examined ...
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Article
Structure and electrical properties of liquid crystal films grown by the Langmuir technology
Liquid-crystal-based films of different thicknesses, fabricated by the Langmuir technology, have been studied. Previously, we revealed a structural phase transition in these films at a temperature of ∼75°C. To...
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Article
The optoelectronic properties of nitrogen- and carbon-doped nanocrystalline titania
Carbon- and nitrogen-doped nanocrystalline titania specimens were studied by optical spectroscopy and electron paramagnetic resonance. The do** of this material was established to result in the appearance of...
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Article
Changes in the optical properties of ultrathin films of liquid crystals during phase transitions
The temperature dependences of diffuse reflection spectra and the polarization of light reflected from ultrathin Langmuir films based on liquid crystals are studied. The results are compared to the experimenta...
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Article
Changes in the optical and electrophysical properties of langmuir films of liquid crystals upon a ferroelectric phase transition
The adsorption isotherms of water molecules, spectra of diffuse reflection and of reflected-light polarization, and electrophysical properties of hyperfine films fabricated on the basis of liquid crystals have...
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Article
Changes in adsorption and optical properties of liquid crystal langmuir films at structural phase transition
The adsorption isotherms of water molecules, absorption spectra, and spectra of diffuse scattering and polarization of reflected light are studied for ultrathin Langmuir films prepared based on liquid crystals...
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Article
Changes in optical properties of TDO BAM BCC Langmuir films during a phase transition
The isotherms of water molecule adsorption and the spectra of absorption, diffusion reflection, and polarization of reflected light for hyperfine Langmuir films that were fabricated based on liquid crystals ar...
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Article
Changes in adsorption and optical properties near the phase transition of super thin vanadyl phthalocyanine Langmuir films
Structural transition in thin vanadyl-phtalocyanine films deposited by Langmuir technology was studied in detail with the help of the vacuum adsorption and optical spectroscopy techniques. The reversible struc...
