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1.
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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2.
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   S 12

    Sadovnikov, S. I.
    Nonstoichiometric Distribution of Sulfur Atoms in Lead Sulfide Structure / S. I. Sadovnikov, A. A. Rempel // Doklady Physical Chemistry. - 2009. - vol. 428, № 1. - P. 167-171 : il. - Bibliogr. : p. 171 (14 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
НЕСТЕХИОМЕТРИЯ -- СУЛЬФИД СВИНЦА -- ПЛЕНКИ ТОНКИЕ -- СТРУКТУРА КРИСТАЛЛИЧЕСКАЯ

\\\\Expert2\\nbo\\Doklady Physical Chemistry\\2009, V. 428, N 1, p.167-171.pdf
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3.
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   S 12

    Sadovnikov, S. I.
    Thermal Stability of Lead Sulfide Nanocrystalline Films / S. I. Sadovnikov, N. S. Kozhevnikova // Glass Physics and Chemistry. - 2000. - Vol. 35, № 1. - P. 60-66 : il. - Bibliogr. : p. 66 (17 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ПЛЕНКИ НАНОКРИСТАЛЛИЧЕСКИЕ -- СУЛЬФИД СВИНЦА -- ОСАЖДЕНИЕ
Аннотация: Thermally stable nanocrystalline films of lead sulfide PbS were prepared using the chemical deposition method. The thickness of the films measured by interferometry was approximately equal to 100 nm, and the average particle size determined from the broadening of the X-ray diffraction reflections was approximately 80 nm. X-ray diffraction analysis revealed that annealing of the film at a temperature of 350 °C in air results in the formation of a protective oxide sulfate phase of the composition PbO · PbSO4 on the surface of the film. It was established that the oxide sulfate phase prevents a further oxidation of the film and serves as an inhibitor of the growth of PbS nanoparticles upon heating up to a temperature of 500° C. The factors responsible for the high thermal stability of the sizes of nanoparticles and the optical properties of the PbS nanocrystalline film were discussed

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4.
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   S 12

    Sadovnikov, S. I.
    New Crystalline Phase in Thin Lead Sulfide Films / S. I. Sadovnikov, A. I. Gusev, A. A. Rempel // JETP Letters. - 2009. - Vol. 89, № 5. - P238-243 : il. - Bibliogr. : p. 243 (23 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
КРИСТАЛЛИЧЕСКАЯ СТРУКТУРА -- ТОНКИЕ ПЛЕНКИ -- СУЛЬФИД СВИНЦА
Аннотация: The crystal structure of thin lead sulfide (PbS) films fabricated by hydrochemical deposition is studied by X ray diffraction analysis. It is established that both the synthesized PbS films and the same films annealed in the temperature interval of 293–423 K have a cubic (space group Fm m) crystal structure different from the B1 type structure. In this structure, sulfur (S) atoms are located not only in positions 4(b) (octahedral interstices of the face centered sublattice of lead (Pb) atoms) but also in positions 8(c), i.e., in tetrahedral interstices. The occupations of positions 4(b) and 8(c) by S atoms are ~0.84 and ~0.08, respectively. Long range order in the location of S atoms in positions of each type is absent, but correlations may be present. The new revealed structure of PbS films remains stable under a prolonged annealing in the temperature interval from 293 to 423 K

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5.
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   S 12

    Sadovnikov, S. I.
    Short-Range Order and Pair Correlations in a Binary Solid Solution with a Square Lattice / S. I. Sadovnikov, A. A. Rempel // Physics of the Solid State. - 2007. - Vol. 49, № 8. - P1543-1547 : il. - Bibliogr. : p. 1547 (14 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ТВЕРДЫЕ РАСТВОРЫ -- БЛИЖНИЙ ПОРЯДОК -- ДАЛЬНИЙ ПОРЯДОК -- УПОРЯДОЧЕННЫЕ СИСТЕМЫ
Аннотация: Using the example of a disordered AyB1 –y solid solution whose atoms are distributed over square-lattice sites, it is shown that correlations in the first coordination shell inevitably cause correlations in the second and more distant coordination shells. These induced correlations decay with distance extending to the ninth coordination shell in a square lattice. The induced correlations are calculated as a function of the correlation in the first coordination shell for binary solid solutions with various compositions. This dependence is described by a third-degree polynomial in the first-shell correlation to within the computational accuracy. The coefficients of the polynomial calculated in this paper using computer simulation can be useful in developing short-range order theory and in calculating the phase diagrams of binary solid solutions

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6.
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   S 12

    Sadovnikov, S. I.
    Simulation of Pair and Three-Particle Correlations in a Binary Solid Solution with a Hexagonal Lattice / S. I. Sadovnikov, A. A. Rempel // Physics of the Solid State. - 2008. - Vol. 50, № 6. - P1131-1136 : il. - Bibliogr. : p. 1136 (12 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ГЕКСАГОНАЛЬНАЯ РЕШЕТКА -- ТВЕРДЫЕ РАСТВОРЫ -- АТОМНАЯ СТРУКТУРА
Аннотация: The correlations revealed in an AyB1 –y disordered solid solution in which atoms occupy sites in the planar hexagonal lattice are investigated. It is demonstrated that pair correlations in the first coordination shell necessarily result in the appearance of pair correlations in the second and subsequent coordination shells. These induced pair correlations decay to the tenth coordination shell. The atomic ordering in solid solutions of all compositions is studied using the computer simulation. It is shown that, within the limits of computational error, the functional dependence between the pair correlation parameter of the first coordination shell and the parameters of the induced pair correlations in the second to ninth coordination shells is described by a third-degree polynomial. The results of the computer simulation of three-particle correlations are in agreement with the analytical solution for the corresponding correlations in the first coordination shell of the hexagonal lattice

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7.
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   S 12

    Sadovnikov, S. I.
    Crystal Structure of Nanostructured PbS Films at Temperatures of 293–423 K / S. I. Sadovnikov, A. A. Rempel // Physics of the Solid State. - 2009. - Vol. 51, № 11. - P2375-2383 : il. - Bibliogr. : p. 2383 (27 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
СУЛЬФИД СВИНЦА -- НАНОСТРУКТУРА
Аннотация: The crystal structure of lead sulfide films prepared by the hydrochemical deposition has been studied by X-ray diffraction. The thickness of the films synthesized is ~100 nm, the size of coherent scattering regions is ~70 nm, and the value of microstrains is ~0.20%. It is established, for the first time, that the assynthesized PbS films and the same films annealed in the temperature range 293–423 K have a cubic crystal structure (space group Fm3m) different from the B1 type structure. In the crystal lattice of the structure revealed, sulfur atoms are located not only in the 4(b) positions but also in the 8(c) positions. The occupancies of the 4(b) and 8(c) positions by the S atoms are ~0.84 and 0.08, respectively

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8.
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   S 12

    Sadovnikov, S. I.
    Correlation of Sulfur Atoms in Nonmetal Planes of Lead Sulfide Films with the D03 Structure / S. I. Sadovnikov, A. A. Rempel // Physics of the Solid State. - 2010. - vol. 52, № 12. - P2458-2466 : il. - Bibliogr. : p. 2465-2466 (28 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
СЕРА -- СУЛЬФИД СВИНЦА -- ПЛЕНКИ НАНОКРИСТАЛЛИЧЕСКИЕ
Аннотация: The distribution of sulfur atoms S and vacancies in planar square and hexagonal nonmetal sub lattices formed by the 4(b) and 8(c) sites in PbS nanocrystalline films with the cubic D03 structure and latent stoichiometry has been investigated. It has been demonstrated using the computer simulation that, in Sy 1 ⎯ y solid solutions with square and hexagonal lattices, the appearance of a correlation between the S atoms and vacancies in the first coordination shell leads to the appearance of correlations in the second and subsequent coordination shells. An increase in the radius of the coordination shell leads to a decrease in the magnitude of induced correlations, and the correlations completely decay in the ninth coordination shell. The functional dependence between the correlation in the first coordination shell and the induced correlations in the subse quent coordination shells has been established for different compositions of the Sy 1 – y solid solution. The results of the simulation can be used to refine the crystal structure of nanocrystalline films and particles of lead sulfide

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9.
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   S 12

    Sadovnikov, S. I.
    The Structure and Optical Properties of Nanocrytalline Lead Sulfide Films / S. I. Sadovnikov, N. S. Kozhevnikova, A. A. Rempel // Semiconductors. - 2010. - Vol. 44, № 10. - P1349-1356 : il. - Bibliogr. : p. 1355-1356 (30 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
СУЛЬФИД СВИНЦА -- ПЛЕНКИ -- НАНОКРИСТАЛЛИЧЕСКИЕ ПЛЕНКИ
Аннотация: The crystal structure of lead sulfide (PbS) films produced by chemical deposition onto a glass substrate is studied by X ray diffraction analysis. The thickness of the synthesized films is ~120 nm, the dimensions of the regions of coherent scattering are 70–80 nm, and the magnitude of microstrains is ~0.20%. It is established that the crystal structure of the synthesized PbS films and of the same films annealed at the temperature 293–423 K is cubic (space group Fm m) and corresponds to the D03 type that differs from the B1 type typical of coarse-grained PbS. In the cubic structure of the PbS nanofilms, there is a latent nonstoichiometric distribution of S atoms and vacancies among octahedral sites 4(b) and tetrahedral positions 8(c). The optical transmittance of the nanocrystalline PbS films is measured in the wavelength range from 200 to 3270 nm. The most pronounced variations in the transmittance is observed in the wavelength range from 700–800 to 1600–2000 nm (corresponding to the photon energy range from ~1.8 to ~0.7 eV). It is established that the band gap Eg is 0.83–0.85 eV, i.e., it is larger than the band gap of single crystal PbS, 0.41 eV

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10.
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   S 12

    Sadovnikov, S. I.
    Effect of particle size on the thermal expansion of nanostructured lead sulfide films / S. I. Sadovnikov, A. I. Gusev // Journal of Alloys and Compounds. - 2014. - Vol. 610. - P196-202.
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
НЕСТЕХИОМЕТРИЯ -- ТЕПЛОВОЕ РАСШИРЕНИЕ -- РАЗМЕР НАНОЧАСТИЦ -- СУЛЬФИД СВИНЦА
Аннотация: The effect of particle size on the thermal expansion of nanostructured lead sulfide films produced by hydrochemical deposition has been studied. The coherent scattering region size and thermal expansion coefficients of PbS nanofilm have been measured depending on the annealing temperature in the interval 293–473 K and on the duration of annealing at a constant temperature of 423 K. It is found that the thermal expansion coefficient α of nanostructured PbS film is nearly twice as large as that of bulk lead sulfide. It is shown that the observed large difference in the coefficients α is due to the small size of PbS particles in the film that leads to the change of the phonon spectrum boundaries and to the growth of anharmonicity of atomic vibrations. The additional contribution to the thermal expansion coefficient caused by the small particle size in PbS nanofilm is estimated theoretically.

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11.
Инвентарный номер: нет.
   
   S 12

    Sadovnikov, S. I.
    Chemical deposition of nanocrystalline lead sulfide powders with controllable particle size / S. I. Sadovnikov, A. I. Gusev // Journal of Alloys and Compounds. - 2014. - Vol. 586. - P105-112.
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
СУЛЬФИД СВИНЦА -- НАНОКРИСТАЛЛИЧЕСКИЕ ПОРОШКИ -- ОСАЖДЕНИЕ ХИМИЧЕСКОЕ -- РАЗМЕР ЧАСТИЦ
Аннотация: For the first time the systematic study of the effect of synthesis conditions (concentrations of reactants, the presence or lack of a complexing agent and its type, the exposure time of deposited PbS particles in the matrix solution) on the size of lead sulfide nanoparticles, their phase composition and the presence of impurity phases is performed. PbS nanopowders are synthesized by deposition from aqueous solutions of lead acetate and sodium sulfide in the presence of EDTA-H2Na2 or sodium citrate. It is found that the phase composition of the deposit and the size of the nanoparticles depend on the initial concentrations of lead and sulfur ions, the presence and type of complexing agents, as well as on the quantitative ratio between the content of lead ions and complexing ions in the solution. The possibility of controllable hydrochemical deposition of PbS nanoparticles with preassigned size from 5 to 55 nm is shown.

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12.
Инвентарный номер: нет.
   
   S 12

    Sadovnikov, S. I.
    Preparation of nanocrystalline lead sulfide powder with controlled particles size / S. I. Sadovnikov, A. I. Gusev // Russian Journal of General Chemistry. - 2014. - Vol. 84, № 2. - С. 173-180
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
АЦЕТАТЫ -- НАНОЧАСТИЦЫ
Аннотация: Из водных растворов ацетата свинца и сульфида натрия в присутствии натриевой соли этилендиаминтетрауксусной кислоты или цитрата натрия синтезированы нанопорошки сульфида свинца. По данным микроскопии и рентгеновской дифракции установлено, что на чистоту и размер образующихся наночастиц влияют концентрации ионов реагентов, присутствие и природа комплексообразующих агентов, а также соотношение концентраций ионов свинца и комплексообразователя в растворе. Показана возможность контролируемого гидрохимического осаждения наночастиц сульфида свинца с заданным размером в интервале от 5 до 55 нм.

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13.
Инвентарный номер: нет.
   
   S 12

    Sadovnikov, S. I.
    Artificial silver sulfide Ag2S: crystal structure and particle size in deposited powders / S. I. Sadovnikov, A. I. Gusev, A. A. Rempel // Superlattices and MIcrostructures . - 2015. - Vol. 83. - P35-47
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ВОДНЫЕ РАСТВОРЫ -- СУЛЬФИД НАТРИЯ -- СУЛЬФИД СЕРЕБРА -- ОСАЖДЕНИЕ -- ПОРОШКИ

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14.
Инвентарный номер: нет.
   
   S 12

    Sadovnikov, S. I.
    An in situ high-temperature scanning electron microscopy study of acanthite-argentite phase transformation in nanocrystalline silver sulfide powder / S. I. Sadovnikov, A. I. Gusev, A. A. Rempel // Physical Chemistry Chemical Physics. - 2015. - Vol. 17, № 32. - P20495-20501. - Библиогр.: с. 20501 (30 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ФАЗОВЫЕ ПРЕВРАЩЕНИЯ -- ПОРОШКИ -- ПОРОШКИ НАНОКРИСТАЛЛИЧЕСКИЕ
Аннотация: For the first time, the α-Ag2S (acanthite)–β-Ag2S (argentite) phase transformation in nanocrystalline and coarse-crystalline powders of silver sulfide has been observed in situ by the scanning electron microscopy method in real-time. The argentite crystals are formed on the surface of acanthite particles as a result of electron-beam heating. According to the differential thermal analysis data, the transformation occurs at a temperature of ∼449–450 K, and the enthalpy of transformation is equal to ∼3.7–3.9 kJ mol−1. The presence of α-Ag2S (acanthite)–β-Ag2S (argentite) phase transformation is confirmed in situ by high-temperature X-ray diffraction data.

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