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1.
Инвентарный номер: нет.
   
   M 78


   
    Modeling of the Structure and Electronic Structure of Condensed Phases of Small Fullerenes C28 and Zn@C28 / A. N. Enyashin, V. V. Ivanovskaya, Yu. N. Makurin, A. L. Ivanovskii // Physics of the Solid State. - 2004. - Vol. 46, № 8. - P1569-1573 : il. - Bibliogr. : p. 1572-1573 (23 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
КОНДЕНСИРОВАННЫЕ ФАЗЫ -- ФУЛЛЕРЕНЫ
Аннотация: A comparative analysis of the stability factors and electronic structure of two possible crystalline forms of small fullerene C28 and endohedral fullerene Zn@C28 with diamond and lonsdaleite structures is performed using a cluster model. Atoms of elements that, when placed inside C28 cages, have no significant effect on the stability of free small-fullerene molecules are shown to be able to dramatically change the electronic properties and reactivity of the C28 skeleton and to be favorable for forming small-fullerene crystalline modifications, which are covalent crystals. In contrast, if the presence of foreign atoms inside C28 cages stabilizes the isolated nanoparticles, then molecular crystals (such as C60 fullerites) are formed due to weak van der Waals forces

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2.
Инвентарный номер: нет.
   
   S 81


    Ivanovskaya, V. V.
    Simulation of Novel Superhard Carbon Materials Based on Fullerenes and Nanotubes / V. V. Ivanovskaya, A. L. Ivanovskii // Journal of Superhard Materials. - 2010. - Vol. 32, № 2. - P67-87 : il. - Bibliogr. : p. 82-87 (143 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
МОДЕЛИРОВАНИЕ -- СВЕРХТВЕРДЫЕ МАТЕРИАЛЫ -- ФУЛЛЕРЕНЫ -- НАНОТРУБКИ
Аннотация: The state-of-the-art in theoretical research directed at the search for superhard materials based on carbon fullerenes and nanotubes has been briefly reviewed. The data available on elastic properties of the main groups of condensed phases that form due to the interaction of fullerenes or (and) nanotubes because of both weak (of the van der Waals type) bonds and polymerization to form strong covalent sp3 bonds have been considered. Models for new hypothetical carbon nanostructured materials (the so called autointercalated hyperdiamonds, covalently bonded lattices of nanotubes, tubular cubic crystals, etc.) are discussed, and elastic properties of them are considered as related to their atomic structure, special features of their electronic structure and chemical bond have been discussed. The problems of synthesis of these systems are briefly considered

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3.
Инвентарный номер: нет.
   
   E 43


   
    Electronic Properties and Chemical Bonds of 3d Atoms in Carbon Nanotubes and Metallocarbohedrenes / A. A. Sofronov, V. V. Ivanovskaya, Yu. N. Makurin, A. L. Ivanovskii // Russian Journal of Coordination Chemistry. - 2002. - Vol. 28, № 9. - P618-629 : il. - Bibliogr. : p. 628-629 (29 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
НАНОТРУБКИ КАРБОНОВЫЕ -- ФУЛЛЕРЕНЫ -- КАРБИД ТИТАНА
Аннотация: The electronic states of 3d atoms (M = Ti, Cr, Fe, and Cu) intercalated into the bulk of carbon nanotubes (NT) or replacing the titanium atom in carbohedrene Ti8C12 are studied by the ab initio self-consistent discrete variation method. The electronic state, charge distributions, and parameters of interatomic interactions are analyzed in nanotubular composites M@NT depending on the NT structure ((9.0) or (4.4)) and position of the M atom (at the end or in the center of the NT) and depending on the cluster symmetry (Th or Td) and positions of M atoms in the metal–carbon cage for “substituted” metcars Ti7MC12. Possible changes in some physicochemical properties of the nanotubes and metallocarbohedrenes with the indicated 3d atoms are discussed

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4.
Инвентарный номер: нет.
   
   T 44


   
    The Electronic Structure of Mixed Metcars Ti7MC12 (M = Y, Zr, Nb, …, Ag) / A. A. Sofronov, V. V. Ivanovskaya, Yu. N. Makurin, A. L. Ivanovskii // Russian Journal of Coordination Chemistry. - 2001. - Vol. 27, № 11. - P808-818 : il. - Bibliogr. : p. 818 (34 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
МЕТКАРЫ -- ЭЛЕКТРОННАЯ СТРУКТУРА -- СТЕХИОМЕТРИЯ
Аннотация: The electronic structures of a series of mixed metallocarbohedrenes (metcars) T7MC12 formed as a result of replacement of the titanium atom in the Ti8C12 metcar by 4d transition metal ions (M = Y, Zr, Nb, É, Ag) are established using the ab initio electron density functional method in the discrete-variational scheme. The dependences of electronic structure, charge distributions, and chemical bonds in the Ti7MC12 metcars on the cluster symmetry (Th or Td) and position of the 4d atom in a molecular cage are discussed. The electronic states of 4d atoms in molecular titanium carbide (Ti8C12 metcar) are compared with those in crystal titanium carbide (cubic TiC phase with rock salt structure). The effect of doping of the T8C12 metcar with 4d atoms on its reactivity is studied.

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5.
Инвентарный номер: нет.
   
   I-98


    Ivanovskaya, V. V.
    Interatomic interactions in cubic nanocrystallite Ti14C13 / V. V. Ivanovskaya, A. A. Sofronov, A. L. Ivanovskii // Journal of Structural Chemistry. - 2001. - Vol. 42, № 4. - P682-685 : il. - Bibliogr. : p. 685 (11 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
КАРБИД ТИТАНА -- НАНОКЛАСТЕРЫ

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6.
Инвентарный номер: нет.
   
   D 58


   
    Dimensionally, Morphologically, and Thermally Induced Phase Transformations in Boron–Nitrogen Nanowires / V. V. Ivanovskaya, A. Zobelli, G. Seifert, A. L. Ivanovskii // JETP Letters. - 2007. - Vol. 85, № 12. - P626-631 : il. - Bibliogr. : p. 630-631 (36 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
НАНОМАТЕРИАЛЫ -- НИТРИД БОРА
Аннотация: Structural, thermal, electronic, and energetic properties of cubic boron nitride (BN) nanowires are studied using the density-functional tight-binding method. The effect of the total or partial rearrangement of the cubic structure of nanowires into the hexagonal one depending on the size, morphology, and thermal treatment of the starting wire has been revealed. As distinct from the known homogeneous carbon diamond-like nanowires, stable BN nanowires are two-phase systems whose “shell” has a hexagonal structure and “core” has a cubic structure. The changes in the electronic properties of BN nanowires induced by their structural transformations are discussed. It is shown that boron–nitrogen nanowires can exhibit both semiconducting and metallic properties

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7.
Инвентарный номер: нет.
   
   I-69


   
    Interatomic interactions and electronic structure of NbSe2 and Nb1.25Se2 nanotubes / A. N. Enyashin, V. V. Ivanovskaya, I. R. Shein, Yu. N. Makurin, N. I. Medvedeva, A. A. Sofronov, A. I. Ivanovskii // Journal of Structural Chemistry. - 2004. - Vol. 45, № 4. - P547-556 : il. - Bibliogr. : p. 555-556 (42 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
НАНОТРУБКИ -- ДИСЕЛЕНИД НИОБИЯ -- МЕЖАТОМНОЕ ВЗАИМОДЕЙСТВИЕ
Аннотация: Atomic models of achiral NbSe2 nanotubes are suggested. Band structure calculations have been performed to investigate the electronic structure and determine the parameters of interatomic interactions. The distribution of the density of states and pair bond occupancies of NbSe2 nanotubes are analyzed in relation to the type of the atomic configuration and the tube diameter; the results are compared with the band structure of the 2-NbSe2 crystal. Calculations have been carried out on hypothetical “superstoichiometric” nanotubes with a formal composition Nb1.25Se2 as possible quasi-one-dimensional nanoforms of autointercalated niobium diselenide

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8.
Инвентарный номер: нет.
   
   I-98


    Ivanovskaya, V. V.
    Electronic structure of fullerenelike molecules based on TiO2, SnO2, and SnS2 / V. V. Ivanovskaya, A. N. Enyashin, A. I. Ivanovskii // Journal of Structural Chemistry. - 2004. - Vol. 45, № 1. - С. 151-155 : il. - Bibliogr. : p. 154-155 (16 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ФУЛЛЕРЕНЫ -- МОДЕЛИРОВАНИЕ -- ОКСИД ТИТАНА -- ДВУОКИСЬ ОЛОВА -- НАНОТРУБКИ
Аннотация: Quantum-chemical modeling of electronic structure and interatomic interaction parameters has been performed for a series of fullerenelike cage molecules based on the isoelectronic TiO2, SnO2, and SnS2. The above characteristics are analyzed in relation to the type of atomic configuration, as well as the size and chemical composition of a nanostructure

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9.
Инвентарный номер: нет.
   
   Q 23


   
    Quantum-chemical modelling of the electronic structure and the chemical bond in multiwalled nanotubes based on metal diborides / V. V. Ivanovskaya, A. N. Enyashin, A. A. Sofronov, Yu. N. Makurin, N. I. Medvedeva, A. L. Ivanovskii // Theoretical and Experimental Chemistry. - 2003. - Vol. 39, № 1. - P1-8 : il. - Bibliogr. : p. 7-8 (18 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
КВАНТОВО-ХИМИЧЕСКОЕ МОДЕЛИРОВАНИЕ -- НАНОТРУБКИ -- ДИБОРИДЫ МЕТАЛЛОВ
Аннотация: A quantum-chemical model of multiwalled nanotubes of magnesium diboride was produced. The electronic structure and the nature of the interatomic bonds in the multiwalled nanotubes were studied in relation to the diameter and the number of Mg-B2 layers: (6,6)-> (3,3) ® (6,6)@(12,12) ->(3,3)@(6,6)@(12,12). Possible methods for the production of diboride nanotubes are discussed. Features of the electronic states in composite nanotubular structures based on the diborides of s and p metals are examined for the first time as illustrated by the(6,6)AlB2(12,12)MgB2 multiwalled nanotube

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10.
Инвентарный номер: нет.
   
   I-98


    Ivanovskaya, V. V.
    New quasi-one-dimensional crystals of metallocarbohedrenes (Sc,Ti,V)8C12 in (12,0) boron-nitrogen nanotubes: quantum-chemical simulation / V. V. Ivanovskaya, A. A. Sofronov, A. L. Ivanovskii // Theoretical and Experimental Chemistry. - 2001. - Vol. 37, № 6. - P333-337 : il. - Bibliogr. : p. 337 (10 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
НАНОТРУБКИ БОР-АЗОТНЫЕ -- КВАНТОВО-ХИМИЧЕСКОЕ МОДЕЛИРОВАНИЕ
Аннотация: A quantum-chemical model was made of new quasi-one-dimensional crystals, consisting of regular chains of metallocarbohedrenes Sc8C12, Ti8C12, and V8C12 (isomers with Th symmetry) inside a single-wall (12,0) boron-nitrogen nanotube. Their electronic characteristics, the nature of the interatomic bonds, and the relative stability in relation to the electronic concentration in the (Sc8C12@(12,0)BN-NT ® Ti8C12@(12,0)BN-NT ® V8C12@(12,0)BN-NT) systems and the mutual arrangement of the metallocarbohedrenes and the nanotube are discussed

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