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 Найдено в других БД:Каталог книг и продолжающихся изданий (5)Каталог препринтов УрО РАН (1975 г. - ) (1)Нанотехнологии (1)Труды Института высокотемпературной электрохимии УрО РАН (2)Труды сотрудников Института органического синтеза УрО РАН (10)Труды сотрудников Института химии твердого тела УрО РАН (29)Расплавы (2)Публикации Чарушина В.Н. (1)
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Общее количество найденных документов : 76
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1.
Инвентарный номер: нет.
   
   A 10


   
    A computer study of the absorption of infrared radiation by systems of molecular clusters [Текст] / A. N. Novruzov, V. N. Chukanov, O. R. Rakhmanova, A. E. Galashev // High Temperature. - 2006. - Vol. 44, № 6. - С. 932-940
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
MOLECULAR CLASTERS
Аннотация: The method of molecular dynamics is used to investigate the process of absorption of N2O and CH4 molecules by water clusters and to determine the frequency spectra of permittivity for systems consisting of clusters mixed in different ratios, namely, (H2O)n, (N2O)i(H2O)10, and (CH4)i(H2O)10. IR-radiation absorption spectra for these systems are calculated and analyzed; the radiation power scattered by these systems and the tangent of dielectric loss angle are determined. The inclusion of anharmonicity of phonon oscillation makes it possible to explain the origin of characteristic frequencies appearing in IR spectra of mixtures of cluster systems. The capture of molecules of greenhouse gases by an ultradisperse aqueous medium affects the ability of this medium to absorb terrestrial radiation, i.e., reduces the greenhouse effect.

\\\\Expert2\\NBO\\High Temperature\\2006, v.44, p.932.pdf
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2.
Инвентарный номер: нет.
   
   A 10


   
    A computer study of the absorption of infrared radiation by systems of molecular clusters [Текст] / A. N. Novruzov, V. N. Chukanov, O. R. Rakhmanova, A. E. Galashev // High Temperature. - 2006. - Vol. 44, № 6. - С. 932-940
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
MOLECULAR CLASTERS
Аннотация: The method of molecular dynamics is used to investigate the process of absorption of N2O and CH4 molecules by water clusters and to determine the frequency spectra of permittivity for systems consisting of clusters mixed in different ratios, namely, (H2O)n, (N2O)i(H2O)10, and (CH4)i(H2O)10. IR-radiation absorption spectra for these systems are calculated and analyzed; the radiation power scattered by these systems and the tangent of dielectric loss angle are determined. The inclusion of anharmonicity of phonon oscillation makes it possible to explain the origin of characteristic frequencies appearing in IR spectra of mixtures of cluster systems. The capture of molecules of greenhouse gases by an ultradisperse aqueous medium affects the ability of this medium to absorb terrestrial radiation, i.e., reduces the greenhouse effect.

\\\\Expert2\\NBO\\High Temperature\\2006, v.44, p.932.pdf
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3.
Инвентарный номер: нет.
   
   B 16


    Baidakov, V. G.
    Comparison of Different Approaches to the Determination of the Work of Critical Cluster Formation / V. G. Baidakov, G. Sh. Boltachev, J. W. P. Schmelzer // Journal of Colloid and Interface Sience. - 2000. - Vol. 231, № 2. - С. 312-321
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CRITICAL CLUSTER -- GIBBS' METHOD -- NUCLEATION RATES
Аннотация: A comparative analysis of the results of determination of the work of critical cluster formation in nucleation theory for three different methods of evaluation—Gibbs' method, the van der Waals-Cahn and Hilliard, and a newly developed modified Gibbs' approach—is given. As a model system for comparison, regular solutions are chosen. In addition to the work of critical cluster formation, the composition of the critical clusters, their characteristic sizes and the values of the surface tension are determined in dependence on the initial supersaturation in the system or, equivalently, on the size of the critical clusters. It is found, in particular, that, for regular solutions, Tolman's equation cannot serve as a first approximation for the description of the curvature dependence of the surface tension even for large cluster sizes and an alternative formula is developed. It is shown that the latter two mentioned methods of determination of the work of critical cluster formation (the van der Waals-Cahn and Hilliard and the modified Gibbs' approach) lead—at least for the model system considered—to qualitatively and partly quantitatively equivalent results. Nevertheless, differences remain which may lead to quantitative deviations when applied to the determination of the steady-state nucleation rates. The possible origin of such deviations is discussed and some further directions of analysis are anticipated

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4.
Инвентарный номер: нет.
   
   B 16


    Baidakov, V. G.
    Comparison of Different Approaches to the Determination of the Work of Critical Cluster Formation / V. G. Baidakov, G. Sh. Boltachev, J. W. P. Schmelzer // Journal of Colloid and Interface Sience. - 2000. - Vol. 231, № 2. - С. 312-321
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CRITICAL CLUSTER -- GIBBS' METHOD -- NUCLEATION RATES
Аннотация: A comparative analysis of the results of determination of the work of critical cluster formation in nucleation theory for three different methods of evaluation—Gibbs' method, the van der Waals-Cahn and Hilliard, and a newly developed modified Gibbs' approach—is given. As a model system for comparison, regular solutions are chosen. In addition to the work of critical cluster formation, the composition of the critical clusters, their characteristic sizes and the values of the surface tension are determined in dependence on the initial supersaturation in the system or, equivalently, on the size of the critical clusters. It is found, in particular, that, for regular solutions, Tolman's equation cannot serve as a first approximation for the description of the curvature dependence of the surface tension even for large cluster sizes and an alternative formula is developed. It is shown that the latter two mentioned methods of determination of the work of critical cluster formation (the van der Waals-Cahn and Hilliard and the modified Gibbs' approach) lead—at least for the model system considered—to qualitatively and partly quantitatively equivalent results. Nevertheless, differences remain which may lead to quantitative deviations when applied to the determination of the steady-state nucleation rates. The possible origin of such deviations is discussed and some further directions of analysis are anticipated

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5.
Инвентарный номер: нет.
   
   B 16


    Baidakov, V. G.
    On two approaches to determination of the nucleation rate of a new phase in computer experiments / V. G. Baidakov, A. O. Tipeev // Thermochimica Acta. - 2011. - Vol.522, №1-2. - С. 14-19
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
HOMOGENEOUS NUCLEATION -- MOLECULAR DYNAMICS -- METASTABLE SYSTEMS
Аннотация: The present paper gives a comparative evaluation of two approaches to the determination of the homogeneous nucleation rate in molecular dynamics computer experiments, viz. the methods of the mean lifetime of a metastable system and the mean time of the first passage to a cluster of a prescribed size. The crystal nucleation rate in a supercooled Lennard–Jones liquid has been determined in molecular dynamics simulation as a function of pressure at a reduced temperature T* = 0.55. The results of simulation have been compared with classical homogeneous nucleation theory. Good agreement between theory and the results of computer simulation has been found

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6.
Инвентарный номер: нет.
   
   B 16


    Baidakov, V. G.
    On two approaches to determination of the nucleation rate of a new phase in computer experiments / V. G. Baidakov, A. O. Tipeev // Thermochimica Acta. - 2011. - Vol.522, №1-2. - С. 14-19
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
HOMOGENEOUS NUCLEATION -- MOLECULAR DYNAMICS -- METASTABLE SYSTEMS
Аннотация: The present paper gives a comparative evaluation of two approaches to the determination of the homogeneous nucleation rate in molecular dynamics computer experiments, viz. the methods of the mean lifetime of a metastable system and the mean time of the first passage to a cluster of a prescribed size. The crystal nucleation rate in a supercooled Lennard–Jones liquid has been determined in molecular dynamics simulation as a function of pressure at a reduced temperature T* = 0.55. The results of simulation have been compared with classical homogeneous nucleation theory. Good agreement between theory and the results of computer simulation has been found

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7.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Application of Molecular Dynamic Simulation of Water Clusters with CO and CO2 Molecules to Binary Nucleation Problems / A. E. Galashev, V. N. Chukanov, G. I. Pozharskaya // Journal of Structural Chemistry. - 2002. - Vol. 43, № 3. - С. 449-457 : рис.
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
GLOBAL CLUSTER GEOMETRY OPTIMIZATION -- THERMODYNAMIC PROPERTIES -- CLUSTERS

\\\\Expert2\\NBO\\Journal of Structural Chemistry\\2002, V. 43, N 3, p.449.pdf
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8.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Application of Molecular Dynamic Simulation of Water Clusters with CO and CO2 Molecules to Binary Nucleation Problems / A. E. Galashev, V. N. Chukanov, G. I. Pozharskaya // Journal of Structural Chemistry. - 2002. - Vol. 43, № 3. - С. 449-457 : рис.
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
GLOBAL CLUSTER GEOMETRY OPTIMIZATION -- THERMODYNAMIC PROPERTIES -- CLUSTERS

\\\\Expert2\\NBO\\Journal of Structural Chemistry\\2002, V. 43, N 3, p.449.pdf
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9.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Computational study of interaction of bromine ions with clusters (O2)6(H2O)50 and (O3)6(H2O)50 [Электронный ресурс] / A. E. Galashev, O. R. Rakhmanova, O. A. Novruzova // High Temperature. - 2011. - Vol.49, №4. - P528-538
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
FLEXIBLE MOLECULES -- IR SPECTRUM -- MOLECULAR DYNAMICS
Аннотация: Abstract-Interaction of bromine ions with water clusters that have absorbed the molecules of oxygen and ozone is studied using a molecular-dynamics simulation of flexible molecules. The cases of location of Br-ions on the surface and in the bulk of the cluster are described. Water clusters with ozone molecules remain stable during their interaction with the Br - ions, while oxygen molecules are found to evaporate from the cluster when Br - ions appear in its bulk. In the presence of Br - ions, the infrared spectra of systems with O 3 molecules are observed to be intensified. The intensities of the IR spectra with O 2 molecules may both increase and decrease depending on the arrangement of the Br - ions. The Raman spectra are sensitive to the appearance of Br - ions only for systems that contain oxygen molecules. As a result of interaction with the Br-ions, the power of IR radiation emitted by the clusters can not only increase, but also decrease

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10.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Computational study of interaction of bromine ions with clusters (O2)6(H2O)50 and (O3)6(H2O)50 [Электронный ресурс] / A. E. Galashev, O. R. Rakhmanova, O. A. Novruzova // High Temperature. - 2011. - Vol.49, №4. - P528-538
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
FLEXIBLE MOLECULES -- IR SPECTRUM -- MOLECULAR DYNAMICS
Аннотация: Abstract-Interaction of bromine ions with water clusters that have absorbed the molecules of oxygen and ozone is studied using a molecular-dynamics simulation of flexible molecules. The cases of location of Br-ions on the surface and in the bulk of the cluster are described. Water clusters with ozone molecules remain stable during their interaction with the Br - ions, while oxygen molecules are found to evaporate from the cluster when Br - ions appear in its bulk. In the presence of Br - ions, the infrared spectra of systems with O 3 molecules are observed to be intensified. The intensities of the IR spectra with O 2 molecules may both increase and decrease depending on the arrangement of the Br - ions. The Raman spectra are sensitive to the appearance of Br - ions only for systems that contain oxygen molecules. As a result of interaction with the Br-ions, the power of IR radiation emitted by the clusters can not only increase, but also decrease

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11.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Computer investigation of the structure of Si73 clusters surrounded by hydrogen [Текст] / A. E. Galashev, I. A. Izmodenov // Glass Physics and Chemistry. - 2008. - Vol. 34, № 2. - С. 173-181
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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12.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Computer investigation of the structure of Si73 clusters surrounded by hydrogen [Текст] / A. E. Galashev, I. A. Izmodenov // Glass Physics and Chemistry. - 2008. - Vol. 34, № 2. - С. 173-181
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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13.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Computer Simulation of the Absorption of CO2 Molecules by Water Cluster: 1. The Stability / A. E. Galashev, O. R. Rakhmanova, V. N. Chukanov // Colloid Journal (Translation of Kolloidnyi Zhurnal). - 2005. - Vol. 67, № 3. - С. 271-277
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CLUSTERS -- MOLECULAR DYNAMICS METHOD -- DIELECTRIC PERTURBATIONS

\\\\Expert2\\NBO\\Colloid Journal\\2005, V.67, N3,271.pdf
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14.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Computer Simulation of the Absorption of CO2 Molecules by Water Cluster: 1. The Stability / A. E. Galashev, O. R. Rakhmanova, V. N. Chukanov // Colloid Journal (Translation of Kolloidnyi Zhurnal). - 2005. - Vol. 67, № 3. - С. 271-277
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CLUSTERS -- MOLECULAR DYNAMICS METHOD -- DIELECTRIC PERTURBATIONS

\\\\Expert2\\NBO\\Colloid Journal\\2005, V.67, N3,271.pdf
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15.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Computer Simulation of the Absorption of CO2 Molecules by Water Cluster: 2. The Microstructure / A. E. Galashev, O. R. Rakhmanova, V. N. Chukanov // Colloid Journal (Translation of Kolloidnyi Zhurnal). - 2005. - Vol. 67, № 3. - С. 278-284
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
MOLECULAR DYNAMICS METHOD -- CLUSTERS -- VORONOI POLYHEDRA

\\\\Expert2\\NBO\\Colloid Journal\\2005, V.67, N3,278.pdf
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16.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Computer Simulation of the Absorption of CO2 Molecules by Water Cluster: 2. The Microstructure / A. E. Galashev, O. R. Rakhmanova, V. N. Chukanov // Colloid Journal (Translation of Kolloidnyi Zhurnal). - 2005. - Vol. 67, № 3. - С. 278-284
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
MOLECULAR DYNAMICS METHOD -- CLUSTERS -- VORONOI POLYHEDRA

\\\\Expert2\\NBO\\Colloid Journal\\2005, V.67, N3,278.pdf
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17.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Computer Simulation of the Absorption of CO2 Molecules by Water Cluster: 3. Dynamic and Dielectric Properties / A. E. Galashev, O. R. Rakhmanova, V. N. Chukanov // Colloid Journal (Translation of Kolloidnyi Zhurnal). - 2005. - Vol. 67, № 3. - С. 285-290
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
FUNCTIONS AUTOCORRELATION -- CLUSTERS -- MOLECULAR DYNAMICS METHOD

\\\\Expert2\\NBO\\Colloid Journal\\2005, V.67, N3,285.pdf
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18.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Computer Simulation of the Absorption of CO2 Molecules by Water Cluster: 3. Dynamic and Dielectric Properties / A. E. Galashev, O. R. Rakhmanova, V. N. Chukanov // Colloid Journal (Translation of Kolloidnyi Zhurnal). - 2005. - Vol. 67, № 3. - С. 285-290
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
FUNCTIONS AUTOCORRELATION -- CLUSTERS -- MOLECULAR DYNAMICS METHOD

\\\\Expert2\\NBO\\Colloid Journal\\2005, V.67, N3,285.pdf
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19.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Computer simulation of the cluster destruction of stratospheric ozone by bromine [Электронный ресурс] / A. E. Galashev, O. R. Rakhmanova // Chinese Physics B . - 2012. - Vol. 21, №11. - P113602
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
BROMINE IONS -- INFRARED AND RAMAN SPECTRA -- WATER CLUSTERS
Аннотация: The interaction of (Br -) iH 2O) 50-i, 0 ≤ i ≤ 6 clusters with oxygen and ozone molecules is investigated by the method of molecular dynamics simulation. The ozone molecules as well as the bromine ions do not leave the cluster during the calculation of 25 ps. The ability of the cluster containing molecular oxygen to absorb the infrared (IR) radiation is reduced in the frequency range of 0 ≤ ω ≤ 3500 cm -1 when the number of the bromine ions in the cluster grows. The intensity of the Raman spectrum is not changed significantly when the Br - ions are added to the ozone-containing system. The power of the emitted IR radiation is increased when the number of bromine ions grows in the oxygen-containing system. The data obtained in this study on the IR and the Raman spectra of the water clusters that contain ozone, oxygen, and Br - can be used to develop an investigation of the mechanisms of ozone depletion

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20.
Инвентарный номер: нет.
   
   G 15


    Galashev, A. E.
    Computer simulation of the cluster destruction of stratospheric ozone by bromine [Электронный ресурс] / A. E. Galashev, O. R. Rakhmanova // Chinese Physics B . - 2012. - Vol. 21, №11. - P113602
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
BROMINE IONS -- INFRARED AND RAMAN SPECTRA -- WATER CLUSTERS
Аннотация: The interaction of (Br -) iH 2O) 50-i, 0 ≤ i ≤ 6 clusters with oxygen and ozone molecules is investigated by the method of molecular dynamics simulation. The ozone molecules as well as the bromine ions do not leave the cluster during the calculation of 25 ps. The ability of the cluster containing molecular oxygen to absorb the infrared (IR) radiation is reduced in the frequency range of 0 ≤ ω ≤ 3500 cm -1 when the number of the bromine ions in the cluster grows. The intensity of the Raman spectrum is not changed significantly when the Br - ions are added to the ozone-containing system. The power of the emitted IR radiation is increased when the number of bromine ions grows in the oxygen-containing system. The data obtained in this study on the IR and the Raman spectra of the water clusters that contain ozone, oxygen, and Br - can be used to develop an investigation of the mechanisms of ozone depletion

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