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1.

Вид документа :
Шифр издания : 53/A 46
Автор(ы) : Ambrose D., Tsonopoulos C., Nikitin E. D.
Заглавие : Vapor−Liquid Critical Properties of Elements and Compounds. 11. Organic Compounds Containing B + O; Halogens + N, + O, + O + S, + S, + Si; N + O; and O + S, + Si
Место публикации : Journal of Chemical & Engineering Data. - 2009. - Vol.54, №3. - С. 669-689
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): critical constants --organic compounds --halogens
Аннотация: This review is part 11 of a series of contributions by the critical properties group of the previous IUPAC Commission I.2 on Thermodynamics, Subcommittee on Thermodynamic Data and the present IUPAC Project #2000-026-1-100, Critical Compilation of Vapor Liquid Critical Properties, sponsored by the Physical and Biophysical Chemistry Division. It presents all known experimental data for the critical constants of organic compounds containing at least two of the following atoms: B, Halogens (counted as one), N, O, S, and Si. Recommendations are given together with uncertainties. Critical temperatures have been converted, where warranted, to the ITS-90 scale
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2.

Вид документа :
Шифр издания : 53/A 46
Автор(ы) : Ambrose D., Tsonopoulos C., Nikitin E. D.
Заглавие : Vapor−Liquid Critical Properties of Elements and Compounds. 11. Organic Compounds Containing B + O; Halogens + N, + O, + O + S, + S, + Si; N + O; and O + S, + Si
Место публикации : Journal of Chemical & Engineering Data. - 2009. - Vol.54, №3. - С. 669-689
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): critical constants --organic compounds --halogens
Аннотация: This review is part 11 of a series of contributions by the critical properties group of the previous IUPAC Commission I.2 on Thermodynamics, Subcommittee on Thermodynamic Data and the present IUPAC Project #2000-026-1-100, Critical Compilation of Vapor Liquid Critical Properties, sponsored by the Physical and Biophysical Chemistry Division. It presents all known experimental data for the critical constants of organic compounds containing at least two of the following atoms: B, Halogens (counted as one), N, O, S, and Si. Recommendations are given together with uncertainties. Critical temperatures have been converted, where warranted, to the ITS-90 scale
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3.

Вид документа : Статья из журнала
Шифр издания : 53/B 74
Автор(ы) : Boltachev G. Sh., Zubarev N.M., Zubareva O. V.
Заглавие : Space charge influence on the angle of conical spikes developing on a liquid-metal anode
Место публикации : Physical Review E: Statistical, Nonlinear, and Soft Matter Physics. - 2008. - Vol. 77, № 5-2. - С. 056607/1-056607/10
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): argon
Аннотация: The influence of the space charge of ions emitted from the surface of a conical spike on its shape has been studied. The problem of the calculation of the spatial distributions of the electric field, ion velocity field, and the space charge density near the cone tip has been reduced to the analysis of a system of ordinary differential equations. As a result of numerical solution of these equations, the criterion for the balance of the capillary and electrostatic forces on the conic surface of a liquid-metal anode has been determined. It has allowed us to relate the electrical current flowing through the system, the applied potential difference, and the cone angle. We have compared the results of our calculations with available experimental data concerning emission from the surface of pure liquid gallium, indium, tin, and some liquid alloys, such as Au+Si, Co+Ge, and Au+Ge. On the basis of the proposed model, explanations have been given for a number of specific features of the emissive behavior of different systems.
\\\\Expert2\\NBO\\Physical Review E\\2008, v.77, N 5, p.056607.pdf
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4.

Вид документа : Статья из журнала
Шифр издания : 53/B 74
Автор(ы) : Boltachev G. Sh., Zubarev N.M., Zubareva O. V.
Заглавие : Space charge influence on the angle of conical spikes developing on a liquid-metal anode
Место публикации : Physical Review E: Statistical, Nonlinear, and Soft Matter Physics. - 2008. - Vol. 77, № 5-2. - С. 056607/1-056607/10
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): argon
Аннотация: The influence of the space charge of ions emitted from the surface of a conical spike on its shape has been studied. The problem of the calculation of the spatial distributions of the electric field, ion velocity field, and the space charge density near the cone tip has been reduced to the analysis of a system of ordinary differential equations. As a result of numerical solution of these equations, the criterion for the balance of the capillary and electrostatic forces on the conic surface of a liquid-metal anode has been determined. It has allowed us to relate the electrical current flowing through the system, the applied potential difference, and the cone angle. We have compared the results of our calculations with available experimental data concerning emission from the surface of pure liquid gallium, indium, tin, and some liquid alloys, such as Au+Si, Co+Ge, and Au+Ge. On the basis of the proposed model, explanations have been given for a number of specific features of the emissive behavior of different systems.
\\\\Expert2\\NBO\\Physical Review E\\2008, v.77, N 5, p.056607.pdf
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5.

Вид документа : Статья из журнала
Шифр издания : 53/C 74
Автор(ы) : Galashev A. E., Polukhin V. A., Izmodenov I. A., Galasheva O. A.
Заглавие : Computer Study of Glass-Like and Amorphous Silicon Nanoparticles
Место публикации : Поверхность. - 2006. - N 1. - С. 41-49: il., tabl. - ISSN 0207-3528. - ISSN 0207-3528
Примечания : Bibliogr.: p. 48-49 (26 ref.)
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): glass-like and amorphous--silicon nanoparticles--voronoi polyhedra construction
Аннотация: Structural properties of vitreous and amorphous silicon nanoparticles containing 300, 400 and 500 atoms were investigated by the molecular dynamics method. The calculated nanoparticles radial distribution Functions and angular distributions of adjoining atoms were compared with the appropriate bulk Si-glass functions. The structure of the central part of silicon nanoparticles was investigatied in detail with the assistance of Voronoi polyhedra construction. The prevalence of five and six fold rings in Si-glasses nanoparticles and the domination of pentagons in amorphous silicon particles were revealed. The lengths of the Si-Si bonds and the number of bonds per atom were determined for nanoparticles under investigated conditions
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6.

Вид документа : Статья из журнала
Шифр издания : 53/C 74
Автор(ы) : Galashev A. E., Polukhin V. A., Izmodenov I. A., Galasheva O. A.
Заглавие : Computer Study of Glass-Like and Amorphous Silicon Nanoparticles
Место публикации : Поверхность. - 2006. - N 1. - С. 41-49: il., tabl. - ISSN 0207-3528. - ISSN 0207-3528
Примечания : Bibliogr.: p. 48-49 (26 ref.)
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): glass-like and amorphous--silicon nanoparticles--voronoi polyhedra construction
Аннотация: Structural properties of vitreous and amorphous silicon nanoparticles containing 300, 400 and 500 atoms were investigated by the molecular dynamics method. The calculated nanoparticles radial distribution Functions and angular distributions of adjoining atoms were compared with the appropriate bulk Si-glass functions. The structure of the central part of silicon nanoparticles was investigatied in detail with the assistance of Voronoi polyhedra construction. The prevalence of five and six fold rings in Si-glasses nanoparticles and the domination of pentagons in amorphous silicon particles were revealed. The lengths of the Si-Si bonds and the number of bonds per atom were determined for nanoparticles under investigated conditions
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7.

Вид документа : Статья из журнала
Шифр издания : 53/C 74
Автор(ы) : Galashev A. E., Izmodenov I. A., Novruzov A. N., Novruzova O. A.
Заглавие : Computer study of physical properties of silicon nanostructures
Место публикации : Semiconductors. - 2007. - Vol. 41, № 2. - С. 190-196
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): physical properties
Аннотация: The method of molecular dynamics is applied to the study of variations in the physical properties of vitreous and amorphous silicon nanoparticles when heated from 300 to 1700 K. The nanoparticles consist of 300, 400, and 500 atoms. The energy and the average length of the Si-Si bond are calculated, and the average number of bonds per atom is determined. Thermally induced strains tend to change the distribution of the excess potential energy among the concentric layers in the nanoparticles. It is shown that, energetically, the most preferential layer is the middle spherical layer of the “warm” nanoparticle. The temperature behavior of the radial and tangential components of the atomic mobility coefficient in the concentric layers is considered. It is established that there is a liquid layer at the nanoparticle surface in the vicinity of the transition to melting. The vitrified Sisubn/sub nanoparticles are kinetically more stable than the similar-sized amorphous particles.
\\\\Expert2\\NBO\\Semiconductors (ФТП)\\2007, v.41, N 2, p.190.pdf
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8.

Вид документа : Статья из журнала
Шифр издания : 53/C 74
Автор(ы) : Galashev A. E., Izmodenov I. A., Novruzov A. N., Novruzova O. A.
Заглавие : Computer study of physical properties of silicon nanostructures
Место публикации : Semiconductors. - 2007. - Vol. 41, № 2. - С. 190-196
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): physical properties
Аннотация: The method of molecular dynamics is applied to the study of variations in the physical properties of vitreous and amorphous silicon nanoparticles when heated from 300 to 1700 K. The nanoparticles consist of 300, 400, and 500 atoms. The energy and the average length of the Si-Si bond are calculated, and the average number of bonds per atom is determined. Thermally induced strains tend to change the distribution of the excess potential energy among the concentric layers in the nanoparticles. It is shown that, energetically, the most preferential layer is the middle spherical layer of the “warm” nanoparticle. The temperature behavior of the radial and tangential components of the atomic mobility coefficient in the concentric layers is considered. It is established that there is a liquid layer at the nanoparticle surface in the vicinity of the transition to melting. The vitrified Sisubn/sub nanoparticles are kinetically more stable than the similar-sized amorphous particles.
\\\\Expert2\\NBO\\Semiconductors (ФТП)\\2007, v.41, N 2, p.190.pdf
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9.

Вид документа : Статья из журнала
Шифр издания : 53/G 15
Автор(ы) : Galashev A. E., Izmodenov I. A.
Заглавие : Computer investigation of the structure of Si73 clusters surrounded by hydrogen
Место публикации : Glass Physics and Chemistry. - 2008. - Vol. 34, № 2. - С. 173-181
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): hydrogen
Аннотация: The stabilization of the structure of Si73 clusters that are surrounded by 60 hydrogen atoms and subjected to seventeenfold stepwise heating from 35 to 1560 K (in steps of ?90 K) is investigated using the molecular dynamics method. The analysis is performed for clusters of three types, i.e., a particle assembled from an icosahedron and a fullerene, a nanocrystal, and a particle with a random atomic packing. In all cases, an increase in the temperature in the course of heating is accompanied by evaporation of a Si atom from the clusters and an increase in the size of silicon particles. The temperature of detachment of Si atoms from clusters is lowest for the cluster with a random atomic packing and highest for the nanocrystal. The nanoassembled particle has the most stable number (close to four) of Si-Si bonds per atom over the entire temperature range 35 ? T ? 1560 K. For each type of Si73 clusters, the mean length of the Si-Si bond decreases with an increase in the temperature. According to the radial distribution functions, the Si73 clusters have different structures even at the temperature T = 1560 K. The distributions of bond angles reflect the presence of fourfold symmetry elements in the nanoassembled cluster and the nanocrystal. The relative depth of “penetration” of hydrogen atoms into the cluster is largest for the nanocrystal and smallest for the nanoassembled nanoparticle. The largest number of hydrogen atoms is “adsorbed” on the particle with a random atomic packing.
\\\\Expert2\\NBO\\Glass Physics and Chemistry\\2008, v. 34, N 2, p.173.pdf
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10.

Вид документа : Статья из журнала
Шифр издания : 53/G 15
Автор(ы) : Galashev A. E., Izmodenov I. A.
Заглавие : Computer investigation of the structure of Si73 clusters surrounded by hydrogen
Место публикации : Glass Physics and Chemistry. - 2008. - Vol. 34, № 2. - С. 173-181
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): hydrogen
Аннотация: The stabilization of the structure of Si73 clusters that are surrounded by 60 hydrogen atoms and subjected to seventeenfold stepwise heating from 35 to 1560 K (in steps of ?90 K) is investigated using the molecular dynamics method. The analysis is performed for clusters of three types, i.e., a particle assembled from an icosahedron and a fullerene, a nanocrystal, and a particle with a random atomic packing. In all cases, an increase in the temperature in the course of heating is accompanied by evaporation of a Si atom from the clusters and an increase in the size of silicon particles. The temperature of detachment of Si atoms from clusters is lowest for the cluster with a random atomic packing and highest for the nanocrystal. The nanoassembled particle has the most stable number (close to four) of Si-Si bonds per atom over the entire temperature range 35 ? T ? 1560 K. For each type of Si73 clusters, the mean length of the Si-Si bond decreases with an increase in the temperature. According to the radial distribution functions, the Si73 clusters have different structures even at the temperature T = 1560 K. The distributions of bond angles reflect the presence of fourfold symmetry elements in the nanoassembled cluster and the nanocrystal. The relative depth of “penetration” of hydrogen atoms into the cluster is largest for the nanocrystal and smallest for the nanoassembled nanoparticle. The largest number of hydrogen atoms is “adsorbed” on the particle with a random atomic packing.
\\\\Expert2\\NBO\\Glass Physics and Chemistry\\2008, v. 34, N 2, p.173.pdf
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