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Общее количество найденных документов : 6
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1.

Вид документа : Статья из журнала
Шифр издания : 53/G 15
Автор(ы) : Galashev A. E.
Заглавие : A computer study of the Raman spectra of the (GaN) 129, (SiO 2) 86, and (GaN) 54(SiO 2) 50 nanoparticles
Место публикации : Russian Journal of Physical Chemistry B. - 2012. - Vol.6, №3. - С. 441-447
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): gallium nitride--molecular dynamics--raman spectra
Аннотация: The Raman spectra of the (GaN) 129, (SiO 2) 86, and (GaN) 54(SiO 2) 50 nanoparticles were calculated using the molecular dynamics method. The spectrum of (SiO 2) 86 had three broad bands only, whereas the Raman spectrum of (GaN) 129 contained a large number of overlapping bands. The form of the Raman spectrum of (GaN) 54(SiO 2) 50 was determined by the arrangement of the GaN and SiO 2 components in it. The nanoparticle with a GaN nucleus had a continuous fairly smooth spectrum over the frequency range 0 ≤ ω ≤ 600 cm -1, whereas the spectrum of the nanoparticle with a SiO 2 nucleus contained well-defined bands caused by vibrations of groups of atoms of different kinds and atoms of the same kind
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2.

Вид документа : Статья из журнала
Шифр издания : 53/G 15
Автор(ы) : Galashev A. E.
Заглавие : A computer study of the Raman spectra of the (GaN) 129, (SiO 2) 86, and (GaN) 54(SiO 2) 50 nanoparticles
Место публикации : Russian Journal of Physical Chemistry B. - 2012. - Vol.6, №3. - С. 441-447
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): gallium nitride--molecular dynamics--raman spectra
Аннотация: The Raman spectra of the (GaN) 129, (SiO 2) 86, and (GaN) 54(SiO 2) 50 nanoparticles were calculated using the molecular dynamics method. The spectrum of (SiO 2) 86 had three broad bands only, whereas the Raman spectrum of (GaN) 129 contained a large number of overlapping bands. The form of the Raman spectrum of (GaN) 54(SiO 2) 50 was determined by the arrangement of the GaN and SiO 2 components in it. The nanoparticle with a GaN nucleus had a continuous fairly smooth spectrum over the frequency range 0 ≤ ω ≤ 600 cm -1, whereas the spectrum of the nanoparticle with a SiO 2 nucleus contained well-defined bands caused by vibrations of groups of atoms of different kinds and atoms of the same kind
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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/G 15
Автор(ы) : Galashev A. E., Rakhmanova O. R.
Заглавие : Temperature changes of the optical properties of (SiO2) n, (GaAs) m, and (SiO2) n (GaAs) m nanoparticles: Computer experiment
Место публикации : High Temperature. - 2013. - Vol.51, №1. - С. 97-105
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): gallium arsenide--permittivity--semiconducting gallium
Аннотация: The optical properties of silicon dioxide and gallium arsenide nanoparticles and the four-component particles based on them were calculated by the molecular dynamics method. The complex dielectric permittivity, infrared and Raman spectra, refractive index, and absorption coefficient of these nano particles were determined. The temperature dependences of the infrared and Raman spectra and the number of the optically active electrons in the nanoparticles composed of a semiconductor and/or a dielectric were investigated
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6.

Вид документа : Статья из журнала
Шифр издания : 53/G 15
Автор(ы) : Galashev A. E., Rakhmanova O. R.
Заглавие : Temperature changes of the optical properties of (SiO2) n, (GaAs) m, and (SiO2) n (GaAs) m nanoparticles: Computer experiment
Место публикации : High Temperature. - 2013. - Vol.51, №1. - С. 97-105
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): gallium arsenide--permittivity--semiconducting gallium
Аннотация: The optical properties of silicon dioxide and gallium arsenide nanoparticles and the four-component particles based on them were calculated by the molecular dynamics method. The complex dielectric permittivity, infrared and Raman spectra, refractive index, and absorption coefficient of these nano particles were determined. The temperature dependences of the infrared and Raman spectra and the number of the optically active electrons in the nanoparticles composed of a semiconductor and/or a dielectric were investigated
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