Electrical and Optical Properties of Polyvinyl Chloride–Polyacetylene Copolymer

Technical Physics - The temperature dependence of the conductivity of heat-treated polyvinyl chloride films containing conjugated double carbon–carbon bonds in the chain of its macromolecules...     

Studying the Interaction between Lutetium Diphthalocyanine Molecules and Silicon Carbide Nanoparticles by Optical Methods

Technical Physics - The properties of a complex formed by lutetium diphthalocyanine and silicon carbide nanoparticles are studied by optical methods. The phase composition of samples and the shape...     

Spontaneous Transitions to High-Conductivity States in Polyvinylchloride Composite Films

Technical Physics - Experimental results on anomalous conductivity in specifically synthesized copolymer films are analyzed. Polyacetylene molecular fragments with variable concentration are...     

Properties of Silver Nanoparticles in the Presence of Dysprosium

Technical Physics - Various methods of binding rare-earth metal ions with nanoparticles make it possible to obtain materials with new properties. The “green” synthesis method has been...     

Analysis of the properties of dehydrochlorinated polyvinyl chloride films

The effect of the time of thermolysis (thermal degradation) on the absorption spectra, specific resistivity, and concentration of holes of partially dehydrochlorinated polyvinyl chloride films has been studied. The number of conjugated carbon double bonds in films has been determined as a function of the time of thermolysis.     

Determination of the recombination parameters of a semiconducting material by the Prony method

A generalized Prony method is used to process experimental data of the relaxation type. The method can be used to separate a compound relaxation process into elementary components (damped exponentials) and to systematically trace the variation of their parameters in the presence of external excitation, thereby opening additional channels of information on the generating physical process. The method is applied to the processing of photoconductivity decay data for complex-doped, compensated silicon in the temperature range 100–300 K after pulsed excitation by laser radiation with λ=1.06 μm in a microwave field. The position of the energy level is obtained as 0.17±0.01 eV, in good agreement with the energy of the oxygen-vacancy complex. Zh. Tekh. Fiz. 69, 54–59 (April 1999)     

Induced Birefringence in CdSe Quantum Dots in Phosphate Glass Matrix

Optics and Spectroscopy - Light-induced anisotropy (optical Kerr optical) caused by the third-order nonlinear susceptibility χ(3) in a nanocomposite material consisting of CdSe quantum dots in...     

Effective Medium Approximations for the Description of Multicomponent Composites

Technical Physics - We compared several generalizations of the Bruggeman effective medium approach with the use of elliptical cells. Namely, a “uniaxial” anisotropic approximation and...     

Nanoscale metal oxide particles produced in the plasma discharge in the liquid phase upon exposure to ultrasonic cavitation. 3. Optical nonlinearities of particle suspensions

The nonlinear response of metal oxide nanoparticles obtained by the acoustic plasma method is measured in aqueous disperse systems at a wavelength of 532 nm. Induced absorption is detected in the Cu₂O, WO₃, and ZnO disperse systems, and bleaching is detected in the Fe₂O₃ system. The real and imaginary parts of nonlinear third-order susceptibilities are determined.