15 Result(s)
within
Yu. A. Zakharov
Chemistry
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Article
Transmission Electron Microscopy: Study of the Bimetallic Nanoparticle Features
In this paper a comprehensive approach to study the morphology of particles and their structural characteristics, as well as the phase composition of multicomponent nanosystems, which combines the method of el...
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Article
Morphology and Electrical Capacitance Characteristics of Nanostructured MnxOy/MWCNT Composites
Reducing potassium permanganate by a carbon matrix (multiwalled carbon nanotubes (MWCNTs)) in aqueous solutions, we have obtained MnxOy/MWCNT nanostructured composites (NSCs). The morphology and texture of the MW...
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Article
Analysis of Phase Composition and CSR Sizes in Non-Equilibrium Nanostructured Systems Fe-Co and Ni-Cu Using Diffraction Maxima Simulations in a Doublet Radiation
The paper addresses the problem of determining phase composition, composition of mixed phases, and the CSR size in structurally similar metal systems where the most part of similar reflections of two phases ov...
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Article
Atomic Absorption Control of Ultimate Allowable Concentration of Elements in Meat Products without Sample Dissolution
In order to control the maximum levels of As, Cr, Pb, Cd, and Sn in meat products, it is proposed to transfer them to a suspension of 140 mg/mL and use an atomic absorption spectrometer with a graphite furnace...
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Article
Phase transformations in Cd–Ni nanostructured system at elevated temperatures
Using X-ray diffraction (both in vacuum and in air), derivatomass-spectrometry and thermo-programmed oxidation, phase transformations in nanostructured Cd–Ni system occurring while heating up 720 °C were descr...
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Article
The Characteristics of the Atomic Structure and Morphology of the Ni-Cores in the Ni/Au Core–Shell Nanoparticles
The Ni-nanoparticles, being similar to the nanocores of the Ni/Au core–shell nanoparticles, are made up of the structural domains with the dimensions about 1 nm. It is experimentally shown in this work for the...
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Article
Determination of the surface structure peculiarities of nanoscale metal particles via small-angle X-ray scattering
The typical distortions of the particle size distribution functions are calculated from the smallangle X-ray diffraction for nanoscale transition metal powders and their mutual binary systems. The abnormal neg...
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Article
Nanostructured carbon—Ni(OH)2 composites
Deposition of Ni(OH)2 from an aqueous solution of Ni(N3)2 onto highly porous carbon matrices of two types with different porous structure afforded high-purity nanostructured hydroxide—carbon composites with a reg...
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Article
Nanostructured composites based on porous carbon matrices filled with nickel hydroxide crystallites
High-purity, nanostructured, morphologically uniform hydroxide-carbon composites filled with anhydrous Ni(OH)2 nanocrystallites (up to 40 wt %) and having a large specific surface area (600–1300 m2/g) and high po...
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Article
Electrothermal atomic absorption spectrometry with two-step probe atomization and primary absorption signal feedback
A method is proposed to reduce the relative detection limits for elements in an atomic absorption spectrometer with a graphite furnace and two-step probe atomization, based on using feedback between the absorp...
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Article
Computer simulation of two-step atomization in graphite furnaces for analytical atomic spectrometry
The processes of sample fractionation by two-step atomization with the intermediate condensation of the analyte on a cold surface in graphite furnaces were theoretically studied. The transfer equation was solv...
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Article
Radiation resistance of ionic and ionic-molecular crystals
The factors that determine the stability of ionic and ionic-molecular crystals in ionizing radiation fields are analyzed. The concepts of the fundamental reactivity (stability) of a solid (the ability of the i...
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Article
Effect of the Pd–Mg Modifier, Magnetic Field, and Gas Flows on the Dynamics of Matrix Vapors in a Transversely Heated Graphite Furnace Atomizer
Shadow spectral filming is used to study the spatiotemporal dynamics of the formation and dissipation of vapors of potassium sulfate and aluminum and indium nitrates in a transversely heated graphite furnace a...
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Article
Spatiotemporal Dynamics of Vapors of Chloride Matrices in a Transversely Heated Graphite Furnace for Atomic Absorption Spectrometry
The dynamic of the formation and dissipation of sodium and nickel chloride vapors in the THGA transversely heated graphite furnace atomizer of a SIMAA 6000 multielement spectrometer was investigated by shadow ...
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Article
Direct determination of phosphorus in vegetable oils by electrothermal atomic absorption spectrometry
An approach to the practical implementation of the standard method of the direct determination of phosphorus in vegetable oils by electrothermal atomic absorption spectrometry with automated sample injection w...
