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1.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Temperature changes of the optical properties of (SiO2) n, (GaAs) m, and (SiO2) n (GaAs) m nanoparticles: Computer experiment [Электронный ресурс] / A. E. Galashev, O. R. Rakhmanova // High Temperature. - 2013. - Vol.51, №1. - P97-105
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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2.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Temperature changes of the optical properties of (SiO2) n, (GaAs) m, and (SiO2) n (GaAs) m nanoparticles: Computer experiment [Электронный ресурс] / A. E. Galashev, O. R. Rakhmanova // High Temperature. - 2013. - Vol.51, №1. - P97-105
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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3.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    A computer study of the Raman spectra of the (GaN) 129, (SiO 2) 86, and (GaN) 54(SiO 2) 50 nanoparticles [Электронный ресурс] / A. E. Galashev // Russian Journal of Physical Chemistry B. - 2012. - Vol.6, №3. - P441-447
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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4.
Инвентарный номер: нет.
   
   R 96


    Rutin, S. B.
    Apparatus for studying heat transfer in nanofluids under high-power heating [Electronic resource] / S. B. Rutin, P. V. Skripov // Journal of Engineering Thermophysics. - 2012. - Vol.21, №2. - P144-153. - Bibliogr. : p. 153 (19 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
HEAT TRAHSFER -- HIGH-POWER HEATING -- ELECTRONIC CONTROL
Аннотация: A technique of electronic control of the probe heating power is developed using the method of controlled pulse heating of a wire probe, that is a resistance thermometer, was developed. An apparatus implementing this technique was fabricated. The characteristic parameters of the apparatus are as follows: the heating pulse length, 1 to 10 ms; the heat flux density through the surface of a 20 µm probe, 1 to 10 MW/m2; repeatability of selected power value in a series of pulses is on a level of 0.05%. As an example, the constant heating power mode is applied for comparing the thermal resistance of nanofluids in the region of stable states of liquid and superheated (with respect to the liquid-vapor equilibrium temperature of the base liquid) ones. The parameter was the content of Al2O3 nanoparticles in the base liquid (isopropanol).

\\\\expert2\\NBO\\Journal of Engineering Thermophysics\\2012, V.31, N 2. P. 144-153.pdf
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5.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    A computer study of the Raman spectra of the (GaN) 129, (SiO 2) 86, and (GaN) 54(SiO 2) 50 nanoparticles [Электронный ресурс] / A. E. Galashev // Russian Journal of Physical Chemistry B. - 2012. - Vol.6, №3. - P441-447
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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6.
Инвентарный номер: нет.
   
   R 96


    Rutin, S. B.
    Apparatus for studying heat transfer in nanofluids under high-power heating [Electronic resource] / S. B. Rutin, P. V. Skripov // Journal of Engineering Thermophysics. - 2012. - Vol.21, №2. - P144-153. - Bibliogr. : p. 153 (19 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
HEAT TRAHSFER -- HIGH-POWER HEATING -- ELECTRONIC CONTROL
Аннотация: A technique of electronic control of the probe heating power is developed using the method of controlled pulse heating of a wire probe, that is a resistance thermometer, was developed. An apparatus implementing this technique was fabricated. The characteristic parameters of the apparatus are as follows: the heating pulse length, 1 to 10 ms; the heat flux density through the surface of a 20 µm probe, 1 to 10 MW/m2; repeatability of selected power value in a series of pulses is on a level of 0.05%. As an example, the constant heating power mode is applied for comparing the thermal resistance of nanofluids in the region of stable states of liquid and superheated (with respect to the liquid-vapor equilibrium temperature of the base liquid) ones. The parameter was the content of Al2O3 nanoparticles in the base liquid (isopropanol).

\\\\expert2\\NBO\\Journal of Engineering Thermophysics\\2012, V.31, N 2. P. 144-153.pdf
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7.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Computer-assisted study of silver absorption by porous silicon dioxide nanoparticles [Электронный ресурс] / A. E. Galashev, V. A. Polukhin // Colloid Journal (Translation of Kolloidnyi Zhurnal). - 2011. - Vol.73, №6. - P761-767
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
IR ABSORPTION -- STRETCHING VIBRATIONS -- SURFACE GROUPS
Аннотация: The absorption of silver atoms by porous silicon dioxide particles is studied by the molecular dynamics method. Upon the absorption of silver atoms, (SiO 2) 50 nanoparticles do not increase their volume. A particle is divided into two unequal parts by an island shell formed from SiO 2 structural units, which causes anisotropy in the electrical and thermal conductivity of the nanocomposite. IR absorption and emission spectra, Raman spectra, as well as the number of electrons active with respect to IR radiation are calculated. The calculated absorption spectra show the mode corresponding to the stretching vibrations of Si-O surface groups. The addition of silver atoms to nanoparticles can enhance significantly the power of heat radiation emission

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8.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Computer-assisted study of silver absorption by porous silicon dioxide nanoparticles [Электронный ресурс] / A. E. Galashev, V. A. Polukhin // Colloid Journal (Translation of Kolloidnyi Zhurnal). - 2011. - Vol.73, №6. - P761-767
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
IR ABSORPTION -- STRETCHING VIBRATIONS -- SURFACE GROUPS
Аннотация: The absorption of silver atoms by porous silicon dioxide particles is studied by the molecular dynamics method. Upon the absorption of silver atoms, (SiO 2) 50 nanoparticles do not increase their volume. A particle is divided into two unequal parts by an island shell formed from SiO 2 structural units, which causes anisotropy in the electrical and thermal conductivity of the nanocomposite. IR absorption and emission spectra, Raman spectra, as well as the number of electrons active with respect to IR radiation are calculated. The calculated absorption spectra show the mode corresponding to the stretching vibrations of Si-O surface groups. The addition of silver atoms to nanoparticles can enhance significantly the power of heat radiation emission

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9.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Modeling the infrared and raman spectra of silicon dioxide clusters absorbing water [Электронный ресурс] / A. E. Galashev, O. R. Rakhmanova, l. A. Zemnukhova // Russian Journal of Physical Chemistry A, Focus on Chemistry. - 2011. - Vol.85, №6. - P955-960
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
IR AND RAMAN SPECTRA -- MOLECULAR DYNAMICS METHOD -- SILICON DIOXIDE CLUSTERS
Аннотация: The effect of absorbed water on the dielectric properties of silicon dioxide nanoparticles is studied by the molecular dynamic method. It is demonstrated using the model of flexible molecules that increasing the number of water molecules in the (SiO2)50 cluster to 40 results in an enhancement of absorption of infrared radiation over the frequency range 0 cm-1 ≤ ω ≤ 1000 cm-1. It is ascertained that the absorption of water molecules by the (SiO2)50 cluster considerably alters the shape of Raman spectra of light, smoothing all the peaks after the first one, and that water molecules are concentrated near the cluster surface formed by SiO2 structural units

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10.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Modeling the infrared and raman spectra of silicon dioxide clusters absorbing water [Электронный ресурс] / A. E. Galashev, O. R. Rakhmanova, l. A. Zemnukhova // Russian Journal of Physical Chemistry A, Focus on Chemistry. - 2011. - Vol.85, №6. - P955-960
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
IR AND RAMAN SPECTRA -- MOLECULAR DYNAMICS METHOD -- SILICON DIOXIDE CLUSTERS
Аннотация: The effect of absorbed water on the dielectric properties of silicon dioxide nanoparticles is studied by the molecular dynamic method. It is demonstrated using the model of flexible molecules that increasing the number of water molecules in the (SiO2)50 cluster to 40 results in an enhancement of absorption of infrared radiation over the frequency range 0 cm-1 ≤ ω ≤ 1000 cm-1. It is ascertained that the absorption of water molecules by the (SiO2)50 cluster considerably alters the shape of Raman spectra of light, smoothing all the peaks after the first one, and that water molecules are concentrated near the cluster surface formed by SiO2 structural units

Найти похожие

11.
Инвентарный номер: нет.
   
   P 80


    Polukhin, V. A.
    Structure and thermal stability of noncrystalline silicon nanoparticles during heating and melting / V. A. Polukhin, A. E. Galashev // RUSSIAN METALLURGY. - 2010. - Vol. 2010, № 2. - С. 116-123
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
KINETIC PROPERTIES -- NANOPARTICLES -- GLASSY NANOPARTICLES

\\\\Expert2\\NBO\\Russian Metallurgy\\2010, N. 2, p.116.pdf
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12.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    IR absorption and Raman spectra of silicon dioxide nanoparticles in the presence of water: Computer experiment [Электронный ресурс] / A. E. Galashev, O. R. Rakhmanova, A. A. Borisikhin // Colloid Journal (Translation of Kolloidnyi Zhurnal). - 2010. - Vol.72, №6. - P771-779
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
ABSORPTION COEFFICIENTS -- COMPUTER EXPERIMENT -- ELECTROMAGNETIC RADIATION
Аннотация: Interactions of (SiO 2) 50 clusters with 10, 20, 30, or 40 water molecules are studied by molecular dynamics method. Flat SiO 2 nanoparticle covered with a water layer is formed after the inclusion of water molecules into the cluster. As a rule, the integral intensity of IR and Raman spectra lowers after the absorption of H 2O molecules by the cluster. The power of IR radiation emitted by the cluster increases nonmonotonically with the addition of water molecules to the cluster. The absorption of water molecules by the cluster leads to a significant increase in the absorption coefficient and only a slight increase in the refractive index. The number of electrons participating in the interaction with electromagnetic radiation increases with the addition of water molecules to the cluster

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13.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    IR absorption and Raman spectra of silicon dioxide nanoparticles in the presence of water: Computer experiment [Электронный ресурс] / A. E. Galashev, O. R. Rakhmanova, A. A. Borisikhin // Colloid Journal (Translation of Kolloidnyi Zhurnal). - 2010. - Vol.72, №6. - P771-779
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
ABSORPTION COEFFICIENTS -- COMPUTER EXPERIMENT -- ELECTROMAGNETIC RADIATION
Аннотация: Interactions of (SiO 2) 50 clusters with 10, 20, 30, or 40 water molecules are studied by molecular dynamics method. Flat SiO 2 nanoparticle covered with a water layer is formed after the inclusion of water molecules into the cluster. As a rule, the integral intensity of IR and Raman spectra lowers after the absorption of H 2O molecules by the cluster. The power of IR radiation emitted by the cluster increases nonmonotonically with the addition of water molecules to the cluster. The absorption of water molecules by the cluster leads to a significant increase in the absorption coefficient and only a slight increase in the refractive index. The number of electrons participating in the interaction with electromagnetic radiation increases with the addition of water molecules to the cluster

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14.
Инвентарный номер: нет.
   
   P 80


    Polukhin, V. A.
    Structure and thermal stability of noncrystalline silicon nanoparticles during heating and melting / V. A. Polukhin, A. E. Galashev // RUSSIAN METALLURGY. - 2010. - Vol. 2010, № 2. - С. 116-123
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
KINETIC PROPERTIES -- NANOPARTICLES -- GLASSY NANOPARTICLES

\\\\Expert2\\NBO\\Russian Metallurgy\\2010, N. 2, p.116.pdf
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15.
Инвентарный номер: нет.
   
   M 79


   
    Molecular dynamics simulation of the physicochemical properties of silicon nanoparticles containing 73 atoms [Текст] / A. E. Galashev, V. A. Polukhin, I. A. Izmodenov, O. R. Rakhmanova // Glass Physics and Chemistry. - 2007. - Vol. 33, № 1. - С. 86-95
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
MOLECULAR DYNAMICS
Аннотация: The physicochemical properties of 73-atom silicon nanoparticles that have a crystal structure, a random atomic packing, and a packing formed by inserting a 13-atom icosahedron into a 60-atom fullerene are investigated using the molecular dynamics method. Analysis of the behavior of the internal energy, the radial distribution function, the distribution of bond angles, and the specific heat at a constant pressure C p in the temperature range 10–1710 K indicates that a crystalline nanoparticle undergoes melting at a temperature of 710 K and that the structural transformations occurring in particles with an irregular atomic packing exhibit specific features. It is demonstrated that the temperature dependence of the self-diffusion coefficient follows a linear behavior. Local deviations from the linear behavior are most pronounced for the crystalline nanoparticle.

\\\\Expert2\\NBO\\Glass Physics and Chemistry\\2007, v. 33, N 1, p.85.pdf
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16.
Инвентарный номер: нет.
   
   C 74


   
    Computer study of physical and chemical properties of stretched noncrystalline silicon nanoparticles [Текст] / A. E. Galashev, I. A. Izmodenov, O. R. Rakhmanova, O. A. Novruzova // Poverkhnost. - 2007. - № 8. - С. 95-103
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
PHYSICAL PROPERTIES

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17.
Инвентарный номер: нет.
   
   C 74


   
    Computer study of temperature dependence of physical properties of noncrystalline silicon nanoparticles [Текст] / A. E. Galashev, I. A. Izmodenov, O. A. Novruzova, A. N. Novruzov // Poverkhnost. - 2007. - № 5. - С. 74-81
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
PHYSICAL PROPERTIES

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18.
Инвентарный номер: нет.
   
   C 74


   
    Computer study of physical properties of silicon nanostructures [Текст] / A. E. Galashev, I. A. Izmodenov, A. N. Novruzov, O. A. Novruzova // Semiconductors. - 2007. - Vol. 41, № 2. - С. 190-196
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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 Sin 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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19.
Инвентарный номер: нет.
   
   E 43


   
    Elastic properties and stability of crystalline silicon nanoparticles. Computer experiment. [Текст] / A. E. Galashev, V. A. Polukhin, I. A. Izmodenov, O. A. Galasheva // Poverkhnost. - 2007. - № 10. - С. 60-67
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
ELASTIC PROPERTIES

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20.
Инвентарный номер: нет.
   
   К 63


   
    Компьютерное изучение растяжения некристаллических наночастиц кремния [Текст] = Computer simulation of the tension of noncrystalline silicon nanoparticles / А. Е. Галашев, И. А. Измоденов, О. Р. Рахманова, О. А. Новрузова // Физика и химия стекла. - 2007. - Т. 33, № 2. - С. 216-227 : рис., табл. - Библиогр.: с. 227-228 (17 назв.) . - ISSN 0132-6651
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
МЕТОД МОЛЕКУЛЯРНОЙ ДИНАМИКИ -- НЕКРИСТАЛЛИЧЕСКИЕ НАНОЧАСТИЦЫ КРЕМНИЯ -- РАСТЯЖЕНИЕ

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 1-20    21-36 
 

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