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Общее количество найденных документов : 17
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 1-10    11-17 
1.
Инвентарный номер: нет.
   
   G 96


    Gusev, A. I.
    Enhancement of the fire resistance of wooden structures [Текст] / A. I. Gusev, S. N. Paznikova, N. S. Kozhevnikova // Pozharovzryvobezopasnost. - 2006. - Vol. 15, № 3. - С. 30-35
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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2.
Инвентарный номер: нет.
   
   U 76


    Uritskaya, A. A.
    Kinetic relationships of the formation of antimony sulfide [Текст] / A. A. Uritskaya, T. P. Bol'shchikova, N. S. Kozhevnikova // Russian Journal of General Chemistry. - 2007. - Vol. 77, № 5. - С. 818-821. - Библиогр. : с. 820 (7 назв.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
КИНЕТИКА -- СУЛЬФИД СУРЬМЫ
Аннотация: The kinetics of deposition of antimony sulfide from solutions of sodium thiosulfate was studied. The reaction orders with respect to the components and the activation energy of the process were determined

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3.
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   A 10


   
    A study of cadmium sulfide nanocrystalline films by grazing incidence X-ray diffraction [Text] / N. S. Kozhevnikova, A. A. Rempel, F. Hergert, A. Magerl // Russian Journal of Physical Chemistry A. - 2007. - Vol. 81, № 5. - P768-772. - Библиогр. : с. 772 (18 назв.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
СУЛЬФИД КАДМИЯ -- НАНОКРИСТАЛЛИЧЕСКИЕ ПЛЕНКИ -- РЕНТГЕНОВСКОЕ ИЗЛУЧЕНИЕ
Аннотация: Thin cadmium sulfide films were prepared on a monocrystalline crystal silicon substrate by chemical deposition from aqueous solutions. Grazing incidence X-ray diffraction revealed that the cadmium sulfide films are comprised of nanocrystal particles, with 80% of the particles having a size of 5±1 nm. Some nanocrystals have a wurtzite structure, while others, a sphalerite one. The presence of cubic phase in the films is indicative of a nonequilibrium state of the nanocrystalline films. Thirty minutes after the onset of the formation of cadmium sulfide, the size and crystal structure of the constituent particles of the film become independent of the deposition time—only the film thickness increases. In addition, the initial stage of the formation of the cadmium sulfide film is accompanied by the deposition of cadmium hydroxide Cd(OH)2

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4.
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   D 56


   
    Diffraction analysis of nanocrystalline particle size of lead and cadmium sulfides prepared by chemical deposition from aqueous solutions [Текст] / N. S. Kozhevnikova, A. A. Uritzkaya, A. S. Kurlov, A. A. Rempel // Journal of Structural Chemistry. - 2004. - № 45. - S154-S159. - Библиогр. : с. S159 (12 назв.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
СУЛЬФИД КАДМИЯ -- СУЛЬФИД СВИНЦА -- НАНОЧАСТИЦЫ -- РЕНТГЕНОВСКАЯ ДИФРАКЦИЯ

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5.
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   S 45


   
    Self-organization of cadmium sulfide nanoparticles on the macroscopic scale [Текст] / A. A. Rempel, N. S. Kozhevnikova, S. Van den Berghe, W. Van Renterghem, A. J. G. Leenaers // Physica Status Solidi B: Basic Solid State Physics. - 2005. - Vol. 242, № 7. - С. R61-R63. - Библиогр. : с. R63 (16 назв.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
СУЛЬФИД КАДМИЯ -- НАНОЧАСТИЦЫ
Аннотация: A self-organization of chemical bath deposited cadmium sulfide colloidal particles into well shaped hexagonal prisms of nearly the same size in a micrometer range is found. The selforganization phenomenon itself and the size of resulting prisms depend on the chemical affinity of the deposition reaction. In spite of the nearly perfect shape, the inner structure of the CdS colloidal crystals is highly disordered and has at least two hierarchy levels. On the scale of scanning electron microscopy, the loose and disordered microstructure of the colloidal crystals consists of nonuniformly shaped coagulates, with sizes between 150 and 250 nm. Transmission electron microscopy shows that the coagulates are polycrystals with large angle boundaries between nonuniformly shaped grains with an average size of 7 ± 2 nm

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6.
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   T 80


   
    Towards particle size regulation of chemically deposited lead sulfide (PbS) [Текст] / A. A. Rempel, N. S. Kozhevnikova, A. J. G. Leenaers, S. Van den Berghe // Journal of Crystal Growth. - 2005. - Vol. 280, № 1-2. - С. 300-308
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
НАНОСТРУКТУРА -- СУЛЬФИДЫ -- СВИНЕЦ -- ОСАЖДЕНИЕ
Аннотация: Powders and solid films of lead sulfides (PbS) were produced by chemical bath deposition from thiourea aqueous solutions at a temperature of 325 K. By a Rietveld-like analysis of the X-ray spectra, it was shown that nanocrystalline PbS has the same rock salt structure B1 (space group Fm-3m) as coarse grained or single crystalline PbS. Nevertheless, this B1 structure is a very distorted structure with root mean square displacements up to 0.011nm and with a microstrain up to 0.3%. The particle sizes in the PbS powders and films measured by scanning electron microscopy (SEM) are found to be in agreement with those determined by Bragg–Brentano X-ray diffraction (XRD) on powders and by glancing incident diffraction (GID) on films. It was found that by changing the chemical affinity in the range from 31.4 to 38.7 kJ/mol, it is possible to regulate the particle size of the chemically deposited sulfide powders from 100 to 300 nm.

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7.
Инвентарный номер: нет.
   
   C 75


   
    Considering the Polynuclear Complexesin the Ionic Equilibria of the Pb2+–H2O System / N. S. Kozhevnikova, S. I. Sadovnikov, A. A. Uritskaya, A. I. Gusev // Russian Journal of General Chemistry. - 2012. - Vol. 82, № 4. - P. 626-634 : il. - Bibliogr. : p. 634 (36 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ГИДРОКСИД СВИНЦА -- ИОННОЕ РАВНОВЕСИЕ
Аннотация: Analysis of conditions of the lead hydroxide and sulfide formation in the Pb2+–H2O system was carried out with accounting for the formation of polynuclear hydroxo-complexes. This allows predicting a possibility of the lead hydroxide formation in the solution before the beginning of the synthesis of lead sulfide. The domains of the stable formation of Pb(OH)2 and PbS were calculated for the systems containing lead citrate complexes and hydroxo-complexes. The proposed calculation method can be used for the quantitative determination of the reaction mixture composition and development of the chemical deposition technology of lead chalcogenides in different morphological forms: nanocrystalline powders (hydrophobic sol), quantum dots, heterostructures of the core@shell type or films. The proposed calculation method is applicable to other chalcogenide systems containing metal ions forming mononuclear and polynuclear hydroxo-complexes

\\\\Expert2\\nbo\\Russian Journal of General Chemistry\\2012, V. 82, N 4, p. 626–634.pdf
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8.
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   T 44


   
    The Synthesis of Nucleus–Shell Cd(OH)2/CdS Structures by Chemical Precipitation from Aqueous Solutions / A. S. Vorokh, N. S. Kozhevnikova, A. A. Uritskaya, A. Magerl // Russian Journal of Physical Chemistry A. - 2008. - Vol. 82, № 7. - P. 1132-1137 : il. - Bibliogr. : p. 1137 (16 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
КАДМИЙ -- СУЛЬФИД КАДМИЯ -- РАСТВОРЫ ВОДНЫЕ -- ОСАЖДЕНИЕ
Аннотация: The region of stable coexistence of Cd(OH)2 and CdS as a function of pH and the concentration of the complex-forming agent (ammonia) was determined by thermodynamic analysis with the purpose of the preparation of Cd(OH)2 cadmium hydroxide particles surrounded by cadmium sulfide CdS shells. In this region, powders were obtained by chemical precipitation during various precipitation times from aqueous solutions. X-ray diffraction was used to track the growth of the CdS nanophase of a disordered structure and hexagonal Cd(OH)2 phase consumption with time. It was found by complexonometry that part of cadmium formed insoluble structures as a result of the formation of continuous nanosized CdS shells on single crystalline Cd(OH)2 particles. A comparative analysis of the experimental data was used to determine the kinetics of formation of nucleus–shell Cd(OH)2/CdS particles in the system

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9.
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   V 92


    Vorokh, A. S.
    Transition of the CdS Disordered Structure to the Wurtzite Structure with an Increase in the Nanoparticle Size / A. S. Vorokh, N. S. Kozhevnikova, A. A. Rempel // Bulletin of the Russian Academy of Sciences: Physics. - 2008. - Vol. 72, № 10. - P. 1395-1398 : il. - Bibliogr. : p. 1397-1398 (29 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
СУЛЬФИД КАДМИЯ -- ВЮРТЦИТЫ -- НАНОЧАСТИЦЫ
Аннотация: The dependence of the structure of cadmium sulfide nanoparticles on their size has been established for nanopowders and thin films. Nanoparticles from 3 to 8 nm in size have a disordered close-packed structure, characterized by the absence of periodic sequence of packing planes. Particles more than 14 nm in size have wurtzite structure, which is typical of bulk cadmium sulfide. The size of the disordered-phase particles was determined from the Scherrer–Debye formula. The size of wurtzite-phase particles was determined by the Williamson– Hall method

\\\\Expert2\\nbo\\Bulletin of the Russian Academy of Sciences Physics\\2008, V. 72, N 10, P. 1395-1398.pdf
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10.
Инвентарный номер: нет.
   
   V 92


    Vorokh, A. S.
    A Cd(OH)2/CdS Heteronanostructure of the Core–Shell Type / A. S. Vorokh, N. S. Kozhevnikova // Doklady Physical Chemistry. - 2008. - vol. 419, № 1. - P.41-46 : il. - Bibliogr. : p. 46 (15 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
Cd(OH) -- CdS -- СУЛЬФИД КАДМИЯ -- ГЕТЕРОНАНОСТРУКТУРЫ

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