Главная
Авторизация
Фамилия
Пароль
 

Базы данных


Труды сотрудников ИФ СО РАН - результаты поиска

Вид поиска

Область поиска
в найденном
 Найдено в других БД:Каталог книг и брошюр библиотеки ИФ СО РАН (20)Каталог журналов библиотеки ИФ СО РАН (1)
Формат представления найденных документов:
полныйинформационныйкраткий
Отсортировать найденные документы по:
авторузаглавиюгоду изданиятипу документа
Поисковый запрос: (<.>K=Absorption<.>)
Общее количество найденных документов : 196
Показаны документы с 1 по 20
 1-20    21-40   41-60   61-80   81-100   101-120      
1.


   
    Enhanced light absorption with a cholesteric liquid crystal layer / I. V. Timofeev [et al.] // Opt. Mater. Express. - 2013. - Vol. 3, Is. 4. - P. 496-501DOI 10.1364/OME.3.000496
   Перевод заглавия: Усиление поглощения света при помощи холестерического жидкокристаллического слоя
Аннотация: We discuss the trapping features of cholesteric liquid crystal as a self-organized photonic crystal and suggest it for absorption improvement. The imperfection of the absorbing surface is manifested by the reflection originating from the indispensable impedance mismatch. The reflection can be suppressed by an additional surface coating to reflect the light back to the absorber once again. In the simple consideration this reflection loop is possible only twice. For a right-handed CLC coating, the boundary reflection switches the light polarization from left to right circular in the first loop and it switches in the second loop back to the left circular polarization before the emerging light finally escapes from the absorbing process. The enhancement of light absorption is possible in the frequency range as large as the photonic bang gap of the cholesteric layer, which can be adjusted as desired.

Смотреть статью,
WOS,
Читать в сети ИФ
Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Natl Chiao Tung Univ, Coll Photon, Inst Imaging & Biomed Photon, Tainan 71150, Taiwan

Доп.точки доступа:
Timofeev, I. V.; Тимофеев, Иван Владимирович; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Vetrov, S. Y.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Lee, W.
}
Найти похожие
2.


   
    Crystal structure and magnetization of a Co3B2O6 single crystal / N. V. Kazak [et al.] // J. Exp. Theor. Phys. - 2013. - Vol. 117, Is. 1. - P. 94-107, DOI 10.1134/S1063776113060186. - Cited References: 43. - The synchrotron measurements were performed at the Kurchatov Center of Synchrotron Radiation and Nanotechnologies (state contract no. 16.552.11.7055).This work was supported by the Russian Foundation for Basic Research (project nos. 12-02-00175-a, 12-02-90410-Ukr_a, 12-02-31543mol_a, 13-02-00958-a), the President of the Russian Federation (grant no. NSh-1044.2012.2), the Siberian Branch of the Russian Academy of Sciences (project no. 38), the Ministry of Education and Science of the Russian Federation (project no. 8365), and an integration project of SO RAN-NAN of Belarus (project no. 29). . - ISSN 1063-7761
РУБ Physics, Multidisciplinary
Рубрики:
ABSORPTION FINE-STRUCTURE
   NICKEL ORTHOBORATE

   RAY

   GDFE3(BO3)(4)

   LUDWIGITE

   NI3(BO3)2

   NI3B2O6

   SPECTRA

Аннотация: The crystal structure and magnetic properties of Co3B2O6 single crystals are studied. Orthorhombic symmetry with space group Pnnm is detected at room temperature. The measurements of static magnetization and dynamic magnetic susceptibility reveal two magnetic anomalies at T (1) = 33 K and T (2) = 10 K and an easy-axis magnetic anisotropy. The effective magnetic moment indicates a high-spin state of the Co2+ ion. A spin-flop transition is found at low temperatures and H (sf) = 23 kOe. EXAFS spectra of the K-edge absorption of Co are recorded at various temperatures, the temperature-induced changes in the parameters of the local environment of cobalt are analyzed, and the effective Co-Co and Co-O distances are determined. The magnetic interactions in the crystal are analyzed in terms of an indirect coupling model.

Смотреть статью,
WOS,
РИНЦ,
Читать в сети ИФ

Публикация на русском языке Особенности кристаллической структуры и намагниченности монокристалла Co3 B2 O6 [Текст] / Н. В. Казак [и др.] // Журн. эксперим. и теор. физ. - 2013. - Т. 144 Вып. 1.- P.109-125

Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660074, Russia
Krasnoyarsk State Aerosp Univ, Kransoyarsk 660014, Russia
Kurchatov Inst, Russian Res Ctr, Moscow 123182, Russia

Доп.точки доступа:
Kazak, N. V.; Казак, Наталья Валерьевна; Platunov, M. S.; Платунов, Михаил Сергеевич; Ivanova, N. B.; Иванова, Наталья Борисовна; Knyazev, Yu. V.; Князев, Юрий Владимирович; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Eremin, E. V.; Еремин, Евгений Владимирович; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Zubavichus, Y. V.
}
Найти похожие
3.


   
    Effects of size polydispersity on the extinction spectra of colloidal nanoparticle aggregates / A. E. Ershov [et al.] // Phys. Rev. B. - 2012. - Vol. 85, Is. 4. - Ст. 045421. - P. , DOI 10.1103/PhysRevB.85.045421. - Cited References: 41. - This work was supported by grants from the following foundations of the Russian Federation: Presidium of RAS, OFN RAS, and SB RAS. . - ISSN 1098-0121
РУБ Physics, Condensed Matter
Рубрики:
METAL FRACTAL CLUSTERS
   OPTICAL-PROPERTIES

   ABSORPTION

   NONLINEARITIES

   COMPOSITES

   SCATTERING

   PARTICLES

   SPHERES

   GRAINS

Аннотация: We investigate the effect of particle polydispersity on the optical extinction spectra of colloidal aggregates of spherical metallic (silver) nanoparticles, taking into account the realistic interparticle gaps caused by layers of stabilizing polymer adsorbed on the metal surface (adlayers). The spectra of computer-generated aggregates are computed using two different methods. The coupled-multipole method is used in the quasistatic approximation and the coupled-dipole method beyond the quasistatics. The latter approach is applicable if the interparticle gaps are sufficiently wide relative to the particle radii. Simulations are performed for two different particle size distribution functions (bimodal and Gaussian), varying the number of particles per aggregate, and different distribution functions of the interparticle gap width. The strong influence of the latter factor on the spectra is demonstrated and investigated in detail.

Смотреть статью,
Scopus,
WoS,
Читать в сети ИФ
Держатели документа:
[Ershov, Alexander E.
Isaev, Ivan L.
Semina, Polina N.
Karpov, Sergei V.] Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Ershov, Alexander E.
Karpov, Sergei V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Markel, Vadim A.] Univ Penn, Dept Bioengn, Dept Radiol, Philadelphia, PA 19104 USA
[Markel, Vadim A.] Univ Penn, Grad Grp Appl Math & Computat Sci, Philadelphia, PA 19104 USA

Доп.точки доступа:
Ershov, A. E.; Ершов, Александр Евгеньевич; Isaev, I. L.; Исаев, Иван Леонидович; Semina, P. N.; Семина, Полина Николаевна; Markel, V. A.; Karpov, S. V.; Карпов, Сергей Васильевич
}
Найти похожие
4.


   
    Infrared absorption investigation of the role of octahedral groups upon the phase transition in the Rb2KMoO3F3 crystal / Y. V. Gerasimova [et al.] // Phys. Solid State. - 2013. - Vol. 55, Is. 11. - P. 2331-2334, DOI 10.1134/S1063783413110097. - Cited References: 10. - This study was supported by the Russian Foundation for Basic Research (project no. 12-02-31205_mol_a), the Ministry of Education and Science of the Russian Federation within the framework of the Russian Federal Target Program "Scientific and Scientific-Pedagogical Human Resources for the Innovative Russia" (agreement no. 8379), and the Interdisciplinary Integration Project of the Siberian Branch of the Russian Academy of Science No. 28. . - ISSN 1063-7834
РУБ Physics, Condensed Matter

Аннотация: The infrared absorption spectra of the oxyfluoride Rb2KMoO3F3 have been measured in the frequency range corresponding to stretching vibrations of the Mo-O anion octahedron with the purpose of clarifying their role in the phase transition. A semi-empirical calculation of two possible configurations of quasioctahedral MoO3F3 groups has been performed. The results of the investigations have demonstrated that some octahedra in the crystal structure change the local symmetry from C (3v) to C (2v) due to the phase transition (T = 197 K).

WOS,
Смотреть статью,
WOS,
Читать в сети ИФ

Публикация на русском языке Изучение роли октаэдрических групп при фазовом переходе в кристалле Rb2KMoO3F3 методом инфракрасного поглощения // Физика твердого тела. - 2013. - Т. 55, Вып. 11. - С. 2215-2217

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Russian Acad Sci, Siberian Branch, Inst Geol & Mineral, Novosibirsk 630090, Russia

Доп.точки доступа:
Gerasimova, Y. V.; Герасимова, Юлия Валентиновна; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Ivanenko, A. A.; Иваненко, Александр Анатольевич; Isaenko, L. I.; Ershov, A. E.; Ершов, Александр Евгеньевич; Pogoreltsev, E. I.; Погорельцев, Евгений Ильич; Russian Foundation for Basic Research [12-02-31205_mol_a]; Ministry of Education and Science of the Russian Federation [8379]; Interdisciplinary Integration Project of the Siberian Branch of the Russian Academy of Science [28]
}
Найти похожие
5.


   
    Изучение роли октаэдрических групп при фазовом переходе в кристалле Rb2KMoO3F3 методом инфракрасного поглощения / Ю. В. Герасимова [и др.] // Физ. тверд. тела. - 2013. - Т. 55, Вып. 11. - С. 2215-2217
Аннотация: Получены спектры инфракрасного поглощения оксифторида Rb2KMoO3F3 в области частот, соответствующих валентным колебаниям Mo-O анионного октаэдра, с целью выяснения их роли при фазовом переходе. Проведен полуэмпирический расчет двух возможных конфигураций квазиоктаэдрических групп MoO3F3. Результаты исследований показали, что при фазовом переходе (T=197 K) в структуре кристалла часть октаэдров меняет локальную симметрию с C3v на C2v.

Смотреть статью,
Читать в сети ИФ

Переводная версия Infrared absorption investigation of the role of octahedral groups upon the phase transition in the Rb2KMoO3F3 crystal. - [Б. м. : б. и.]

Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Герасимова, Юлия Валентиновна; Gerasimova, J.V.; Орешонков, Александр Сергеевич; Oreshonkov, A.S.; Втюрин, Александр Николаевич; Vtyurin, A. N.; Иваненко, Александр Анатольевич; Ivanenko, A. A.; Исаенко, Л. И.; Ершов, Александр Андреевич; Ershov, A. A.; Погорельцев, Евгений Ильич; Pogoreltsev, E. I.
}
Найти похожие
6.


   
    Spectroscopic properties of ErAl3(BO3)4 single crystal / A. V. Malakhovskii [et al.] // Chem. Phys. - 2014. - Vol. 428. - P. 137–143, DOI 10.1016/j.chemphys.2013.11.008. - Cited References: 43. - The work was supported by the Russian Foundation for Basic Researches grant 12-02-00026, by the Russian President Grants SS-1044.2012.2 and 4828.2012.2, by project No 3.9.5 PSB RAS, and by the Ministry of Education and Science of Russian Federation grant 8365 . - ISSN 0301-0104. - ISSN 1873-4421
   Перевод заглавия: Спектроскопические свойства монокристалла ErAl3(BO3)4
РУБ Chemistry, Physical + Physics, Atomic, Molecular & Chemical
Рубрики:
RARE-EARTH IONS
   GREEN UP-CONVERSION

   ER3+ IONS

   MICROCHIP LASER

   ABSORPTION INTENSITIES

   YAL3(BO3)4 CRYSTAL

   OPTICAL-ABSORPTION

   FIELD ANALYSIS

   GROWTH

   LUMINESCENCE

Кл.слова (ненормированные):
Rare earth compounds -- Er3+ -- Spectroscopic properties -- Judd-Ofelt analysis -- Luminescence
Аннотация: Single crystal of ErAl3(BO3)4 was grown and its structure was studied. Polarized absorption spectra of ErAl3(BO3)4 single crystal were measured in the spectral range 1670–330 nm (6000–30000 cm−1). The Judd–Ofelt spectroscopic parameters have been determined: Ω2 = 4.87 × 10−20 cm2, Ω4 = 2.49 × 10−20 cm2, Ω6 = 2.72 × 10−20 cm2. These parameters have been used to calculate the radiative transition probabilities, the multiplet luminescence branching ratios and the fluorescence life times of the manifolds. The luminescence spectra due to transitions 2H11/2 → 4I15/2 (526 nm), 4S3/2 → 4I15/2 (548 nm), 4F9/2 → 4I15/2 (662 nm), 2H11/2 → 4I13/2 + 4I9/2 → 4I15/2 (800 nm) and 4S3/2 → 4I13/2 (855 nm) were recorded in α, σ and π polarizations. The most intensive luminescence belonged to 4S3/2 → 4I15/2 transition (548 nm).
Поляризованные спектры поглощения ErAl3 (BO3) 4 монокристалла были измерены в спектральном диапазоне 1670-330 нм (6000-30000 см-1). Спектроскопические параметры Джадда-Офельта были определены как: Ω2 = 4,87 • 10-20 см2, Ω4 = 2.49 • 10-20 см2, Ω6 = 2,72 • 10-20 см2. Параметры были использованы для расчета вероятностей излучающих переходов, мультиплетные отношения люминесценции раскола и времена жизни мультиплетов. Спектры люминесценции за счет переходов 2П11 / 2 → 4I15 / 2 (526 нм), 4S3 / 2 → 4I15 / 2 (548 нм), 4F9 / 2 → 4I15 / 2 (662 нм), 2П11 / 2 → 4I13 / 2 + 4I9 / 2 → 4I15 / 2 (800 нм) и 4S3 / 2 → 4I13 / 2 (855 нм) были записаны в α, σ и π поляризации. Наиболее интенсивное свечение принадлежало переходу 4S3 / 2 → 4I15 / 2 (548 нм).

Смотреть статью,
Scopus,
WoS,
WOS,
Читать в сети ИФ

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Kutsak, T. V.; Куцак, Т. В.; Sukhachev, A. L.; Сухачев, Александр Леонидович; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Krylov, A. S.; Крылов, Александр Сергеевич; Gudim, Irina A.; Гудим, Ирина Анатольевна; Molokeev, M. S.; Молокеев, Максим Сергеевич
}
Найти похожие
7.


   
    Characterization of bio-synthesized nanoparticles produced by Klebsiella oxytoca / L. Anghel [et al.] // Journal of Physics: Conference Series. - 2012. - Vol. 351, Is. 1. - Ст. 012005. - P. , DOI 10.1088/1742-6596/351/1/012005 . - ISSN 1742-6588
Кл.слова (ненормированные):
Absorption peaks -- Biominerals -- Chemical compositions -- Exopolysaccharides -- Ferrihydrites -- Fitting procedure -- FTIR spectroscopy -- Klebsiella oxytoca -- Model calculations -- Morphological analysis -- Radius of gyration -- Scattering objects -- Small angle X-ray scattering -- Structural and morphological properties -- Structural investigation -- UV-vis spectroscopy -- Water dispersion -- Water-dispersed -- Experiments -- Nanoparticles -- Polysaccharides -- Raman spectroscopy -- Scattering -- Ultraviolet visible spectroscopy -- Synthesis (chemical)
Аннотация: Structural and morphological properties of biogenic ferrihydrite nanoparticles produced by bacteria Klebsiella oxytoca are investigated. The stability of water dispersions of biomineral particles produced by Klebsiella oxytoca was monitored by UV-Vis spectroscopy. Their chemical composition was determined by FT-IR spectroscopy. The vibrational spectra of biogenic ferrihydrite nanoparticles revealed typical absorption peaks of exopolysaccharides. Morphological analysis based on Raman spectroscopy indicated the presence of exopolysaccharides on the surface as well as inside the pores of the ferrihydrite nanoparticles. Structural investigations of ultrasonic assisted samples of different concentration of water dispersed particles were performed using small angle X-ray scattering analysis. Model calculations and fitting procedures revealed scattering objects of an elongated shape with 6.73В±0.16 nm radius of gyration. В© Published under licence by IOP Publishing Ltd.

Scopus

Доп.точки доступа:
Anghel, L.; Balasoiu, M.; Ishchenko, L. A.; Stolyar, S. V.; Столяр, Сергей Викторович; Kurkin, T. S.; Rogachev, A. V.; Kuklin, A. I.; Kovalev, Yu.S.; Raikher, Yu.L.; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Duca, G.; International Workshop on SANS-YuMO User Meeting at the Start-up of Scientific Experiments on the IBR-2M Reactor: Devoted to the 75th Anniversary of Yu M Ostanevich's Birth(2 ; Dubna)(27 May 2011 - 30 May 2011)
}
Найти похожие
8.


    Popov, E. A.
    Temperature and field dependence of exciton-magnon absorption of NaMnCl//3. / E. A. Popov, M. M. Kotlyarskii, I. S. Edelman // Physica Status Solidi B - Basic Research. - 1985. - Vol. 132, Is. 2. - P. 465-470 . - ISSN 0370-1972
Кл.слова (ненормированные):
BAND STRUCTURE -- LIGHT - Absorption -- SODIUM COMPOUNDS - Optical Properties -- EXCITON-MAGNON ABSORPTION -- SODIUM MANGANESE CHLORIDE -- MAGNETIC MATERIALS
Аннотация: The behaviour of the optical absorption bands of NaMnCl//3 is experimentally studied in the region of the **6A//1//g to **4A//1//g, **4E//g(**4G) transition of the Mn**2** plus ion in the temperature range 1. 8 to 20 K and in magnetic fields up to 20 T. Exciton and its 'hot' magnon sidebands are observed in the spectrum. The anomalous temperature dependence of the exciton-magnon bands intensity is explained by participation of magnons with wave vector K does not equal 0 in absorption. The low energy exciton-magnon band is supposed to be due to simultaneous creation of an exciton and annihilation of three thermally created magnons.

Scopus

Доп.точки доступа:
Kotlyarskii, M. M.; Edelman, I. S.; Эдельман, Ирина Самсоновна
}
Найти похожие
9.


   
    Spectroscopic properties of Nd3+ in orthorhombic δ-BiB3O6 crystal / D. A. Ikonnikov [et al.] // Opt. Mater. - 2012. - Vol. 34, Is. 11. - P. 1839-1842, DOI 10.1016/j.optmat.2012.05.016. - Cited References: 23. - The work was supported by Ministry of Education and Science of Russian Federation (Contract 16.740.11.0150), by Russian Foundation for Basic Researches Grant 12-02-00026, Grant of President of Russian Federation for support of leading scientific schools No. SS-4828.2012.2, Grant No. SFU.F12, and Projects No. 28, 43 and No. 101 of SB RAS. . - ISSN 0925-3467
РУБ Materials Science, Multidisciplinary + Optics
Рубрики:
SPECTRAL-LINE INTENSITIES
   RARE-EARTH IONS

   LASER CRYSTAL

   NdAl3(BO3)(4) NAB

   OPTICAL-SPECTRA

   BiB3O6

   SYSTEMS

   GROWTH

   Er3+

   Tm3+

Кл.слова (ненормированные):
Neodymium -- Orthorhombic bismuth triborate -- Absorption -- Judd-Ofelt analysis
Аннотация: Absorption spectra of the Nd3+ ions in an orthorhombic δ-BiB3O6 single crystal were measured in the spectral range 11,000-20,500 cm-1. The f-f transition intensities were analyzed in terms of the Judd-Ofelt theory, and the following parameters of the theory were obtained: Ω2 = 6.35 × 10-20 cm2, Ω4 = 4.86 × 10-20 cm 2, and Ω6 = 11.233 × 10-20 cm 2. The strengths, spontaneous emission probabilities, branching ratios, spectroscopic quality factor and excited state radiative lifetime were calculated for laser transitions from the 4F3/2 state to 4IJ manifold. Spectroscopic properties of Nd 3+:δ-BiB3O6 crystal favor lasing at 1.3 μm, where this crystal possesses near non-critical phase matching for second harmonic generation. © 2012 Elsevier B.V. All rights reserved.

Смотреть статью,
Scopus,
WoS,
Читать в сети ИФ
Держатели документа:
[Malakhovskii, A. V.
Sukhachev, A. L.
Zaitsev, A. I.
Aleksandrovsky, A. S.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Ikonnikov, D. A.
Zaitsev, A. I.
Aleksandrovsky, A. S.] Siberian Fed Univ, Krasnoyarsk, Russia
[Jubera, V.] Univ Bordeaux, CNRS, ICMCB, F-33608 Pessac, France

Доп.точки доступа:
Ikonnikov, D. A.; Malakhovskii, A. V.; Малаховский, Александр Валентинович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Zaitsev, A. I.; Зайцев, Александр Иванович; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Jubera, V.
}
Найти похожие
10.


   
    Calculating the energy of vacancies and adatoms in a hexagonal SiC monolayer / A. A. Kuzubov [et al.] // Russ. J. Phys. Chem. A. - 2012. - Vol. 86, Is. 7. - P. 1091-1095, DOI 10.1134/S0036024412070138. - Cited References: 21 . - ISSN 0036-0244
РУБ Chemistry, Physical
Рубрики:
INITIO MOLECULAR-DYNAMICS
   ELECTRONIC-PROPERTIES

   ABSORPTION-SPECTRA

Кл.слова (ненормированные):
silicon carbide -- defects -- adatoms -- density functional method
Аннотация: It is noted that the development of semiconductor SiC-electronics is prevented by a low quality of grown silicon carbide single crystals. It is found that structural defects of a substrate penetrating into an epitaxial layer upon subsequent homoepitaxial growth can considerably degrade a device's characteristics. We investigate the effect of the deformation of a hexagonal SiC monolayer on vacancy stability and material properties, and study the processes of silicon and carbon adatom migration over a surface of SiC.

Смотреть статью,
Scopus,
WoS,
Читать в сети ИФ

Публикация на русском языке Расчет энергии вакансий и адатомов в монослое гексагонального SiC [Текст] / А. А. Кузубов [и др.] // Журн. физ. химии. - 2012. - Т. 86 № 7. - С. 1207-1211

Держатели документа:
[Kuzubov, A. A.
Eliseeva, N. S.
Tomilin, F. N.
Tolstaya, A. V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Kuzubov, A. A.
Krasnov, P. O.
Tomilin, F. N.
Fedorov, A. S.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Kuzubov, A. A.
Krasnov, P. O.] Siberian State Technol Univ, Krasnoyarsk 660049, Russia

Доп.точки доступа:
Kuzubov, A. A.; Кузубов, Александр Александрович; Eliseeva, N. S.; Krasnov, P. O.; Краснов, Павел Олегович; Tomilin, F. N.; Томилин, Феликс Николаевич; Fedorov, A. S.; Федоров, Александр Семенович; Tolstaya, A. V.
}
Найти похожие
11.


   
    Optical and magneto-optical properties of Nd0.5Gd0.5Fe3(BO3)4 single crystal in the near IR spectral region / A. V. Malakhovskii [et al.] // J. Alloys Compd. - 2012. - Vol. 542. - P. 157-163, DOI 10.1016/j.jallcom.2012.07.061. - Cited References: 23. - The work was supported by the Russian Foundation for Basic Researches Grant 12-02-00026 and by the Russian President Grant SS-1044.2012.2. . - ISSN 0925-8388
РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering
Рубрики:
MAGNETIC CIRCULAR-DICHROISM
   GDFE3(BO3)(4)

   YB3+

   ER3+

   ND3+

Кл.слова (ненормированные):
Rare earth compounds -- Nd3+ -- Antiferromagnets -- Multiferroics -- Magnetic circular dichroism -- Absorption spectra
Аннотация: Polarized optical absorption and magnetic circular dichroism (MCD) spectra of the trigonal multiferroic Nd0.5Gd0.5Fe3(BO3)4 were studied in the region of transitions 4I9/2 → 4F3/2 and 4I9/2 → (4F5/2 + 2H9/2) in Nd3+ ion. Components of the crystal field splitting of the states were identified with the help of MCD and polarized absorption spectra. Splitting of the Nd3+ absorption lines caused by the magnetic ordering were observed. Splitting of Nd3+ ground state in Fe-sublattice exchange field was found to be ∼9 cm−1 at 5.7 K. The Zeeman splitting of some absorption lines in the external magnetic field and changes of the effective Landé factors in the C3-direction as a result of the corresponding optical transitions were found. Peculiarities in the temperature behavior of the absorption lines connected both with the ground and excited states were revealed. Peculiarities connected with the excited states testify to the local crystal distortions in the excited states.

Смотреть статью,
Scopus,
WoS,
Читать в сети ИФ
Держатели документа:
[Malakhovskii, A. V.
Sukhachev, A. L.
Gudim, I. A.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Gnatchenko, S. L.
Kachur, I. S.
Piryatinskaya, V. G.] Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Gnatchenko, S. L.; Kachur, I. S.; Piryatinskaya, V. G.; Sukhachev, A. L.; Сухачев, Александр Леонидович; Gudim, I. A.; Гудим, Ирина Анатольевна
}
Найти похожие
12.


   
    Spectroscopic properties of Nd0.5Gd0.5Fe3(BO3)4 single crystal / A. V. Malakhovskii [et al.] // J. Alloys Compd. - 2012. - Vol. 529. - P. 38-43, DOI 10.1016/j.jallcom.2012.03.066. - Cited References: 51. - The work was supported by the Russian Foundation for Basic Researches grant 12-02-00026, by the Russian President Grants SS-1044.2012.2 and SS-4828.2012.2, by Ministry of Education and Science of Russian Federation (Contract 16.740.11.0150), by grant no. SFU.F12 and by Projects No. 28, 43 and No. 101 of SB RAS. . - ISSN 0925-8388
РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering
Рубрики:
SPECTRAL-LINE INTENSITIES
   RARE-EARTH IONS

   MAGNETIC-PROPERTIES

   NDAL3(BO3)(4) NAB

   OPTICAL-SPECTRA

   LASER CRYSTAL

   TRANSITIONS

   ABSORPTION

   ND3+

   PR3+

Кл.слова (ненормированные):
Magnetically ordered materials -- Rare earth alloys and compounds -- Transition metal alloys and compounds -- Optical properties
Аннотация: The polarized absorption spectra of trigonal single crystal Nd0.5Gd0.5Fe3(BO3)4 were measured in the spectral range 10,000–22,000 cm−1. The d–d and f–f transitions spectra were separated. The f–f transitions intensities were analyzed in terms of the Judd–Ofelt theory in a ferroborate with huntite structure for the first time, and the following parameters of the theory were obtained: Ω2 = 4.4 × 10−20 cm2, Ω4 = 8.04 × 10−20 cm2, and Ω6 = 8.25 × 10−20 cm2. The strengths, spontaneous emission probabilities, branching ratios, spectroscopic quality factor and excited state lifetime were calculated for transitions from the 4F3/2 state to 4IJ manifold. All the obtained spectroscopic characteristics were compared with those of alumoborates with the same crystal structure.

Смотреть статью,
Scopus,
WoS,
Читать в сети ИФ
Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Leont'ev, A. A.; Леонтьев, Андрей Александрович; Gudim, I. A.; Гудим, Ирина Анатольевна; Krylov, A. S.; Крылов, Александр Сергеевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич
}
Найти похожие
13.


   
    Nature of optical properties of GdFe3(BO3)4 and GdFe2.1Ga0.9(BO3)4 crystals and other 3d5 antiferromagnets / A. V. Malakhovskii [et al.] // Eur. Phys. J. B. - 2012. - Vol. 85, Is. 2. - P. 80, DOI 10.1140/epjb/e2012-20953-1. - Cited References: 70. - The work was supported by the Russian Foundation for Basic Researches Grant 12-02-00026 and by Russian President Grant NSh-1044.2012.2. . - ISSN 1434-6028
РУБ Physics, Condensed Matter
Рубрики:
IRON BORATE GDFE3(BO3)4
   D-D TRANSITIONS

   EARTH FERROBORATES RFE3(BO3)4

   ABSORPTION-SPECTRA

   OCTAHEDRAL COMPLEXES

   ELECTRONIC-STRUCTURE

   NEEL TEMPERATURE

   FINE-STRUCTURE

   EXCHANGE

   IONS

Аннотация: Influence of the partial substitution of paramagnetic Fe3+ ions by diamagnetic Ga3+ ions in the trigonal crystal GdFe3 (BO3)4 on its optical and magnetic properties is studied and discussed in connection with problems common for all antiferromagnets containing 3d 5 ions. Polarized optical absorption spectra and linear birefringence of GdFe3 (BO3)4 and GdFe2.1Ga0.9 (BO3)4 single crystals have been measured in the temperature range 85–293 K. Specific heat temperature dependence (2–300 K) and structure of GdFe2.1Ga0.9 (BO3)4 crystal have been also studied. As a result of substitution of 30% Fe to Ga the Neel temperature diminishes from 38 till 16 K, the strong absorption band edge shifts on 860 cm-1 (0.11 eV) to higher energy and the d-d transitions intensity decreases substantially larger than the Fe concentration does. Strong absorption band edge is shown to be due to Mott-Hubbard transitions. Correlation between position of the strong absorption band edge and the Neel temperature of antiferromagnets has been revealed. Properties of the doubly forbidden d-d transitions in the studied crystals and in other antiferromagnets are explained within the framework of the model of the exchange-vibronic pair absorption, which is theoretically analyzed in detail. The model permitted us to determine the connection between parameters of d-d absorption bands (intensity, width and their temperature dependences), on the one hand, and the exchange, spin-orbit and electron-lattice interactions, on the other hand.

Смотреть статью,
Scopus,
WoS,
Читать в сети ИФ
Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Leont'ev, A. A.; Леонтьев, Андрей Александрович; Kartashev, A. V.; Карташев, Андрей Васильевич; Temerov, V. L.; Темеров, Владислав Леонидович; Gudim, I. A.; Гудим, Ирина Анатольевна
}
Найти похожие
14.


    Belyaev, B. A.
    Micromagnetic modeling of static and dynamic properties of ferromagnetic/antiferromagnetic bilayer / B. A. Belyaev, A. V. Zotov, P. N. Solovev // Int. Sib. Conf. on Control and Communicat. : Proc. - 2013. - Conference code: 102462. Cт. 6693573, DOI 10.1109/SIBCON.2013.6693573. - Cited References: 13 . - ISSN 978-1-479
РУБ Engineering, Electrical & Electronic + Telecommunications
Рубрики:
EXCHANGE-BIAS
   DEPENDENCE

Кл.слова (ненормированные):
absorption spectrum -- exchange bias -- micromagnetic modeling
Аннотация: Static and dynamic properties of ferromagnetic (F) antiferromagnetic (AF) bilayer have been studied by using micromagnetic calculations. The reasonable value of exchange bias field has been obtained. In addition, we have shown the strong dependence of a resonance frequency F/AF structure on an angle between an external magnetic field and an easy axis of the bilayer.

WOS,
Смотреть статью,
Материалы конференции,
Читать в сети ИФ

Доп.точки доступа:
Zotov, A. V.; Solovev, P. N.; Беляев, Борис Афанасьевич; International Siberian Conference on Control and Communications(10 ; 2013 ; Sept. 12-13 ; Krasnoyarsk)
}
Найти похожие
15.


   
    Laser photolysis of fluorone dyes in a chitosan matrix / E. A. Slyusareva [et al.] // Quantum Electron. - 2012. - Vol. 42, Is. 8. - P. 687-692, DOI 10.1070/QE2012v042n08ABEH014860. - Cited References: 32 . - ISSN 1063-7818
РУБ Engineering, Electrical & Electronic + Physics, Applied
Рубрики:
POLY(VINYL ALCOHOL) MATRIX
   XANTHENE DYES

   ROSE-BENGAL

   FLUORESCENCE PROPERTIES

   DELAYED FLUORESCENCE

   ORGANIC-MOLECULES

   TRIPLET-STATE

   EXCITATION

   ABSORPTION

   PHOSPHORESCENCE

Кл.слова (ненормированные):
laser photolysis -- fluorescein -- dibromofluorescein -- eosin Y -- erythrosin B -- Rose Bengal -- chitosan -- photobleaching kinetics -- two-step absorption
Аннотация: Kinetics of laser-induced photobleaching of fluorone dyes (fluorescein, dibromofluorescein, eosin Y, erythrosin B, Rose Bengal) is studied in a chitosan matrix. For all dyes the bleaching kinetics at the intensities of laser radiation 0.7 — 11.9 W cm-2 demonstrates quasi-monomolecular behaviour. The results are analysed using a kinetic model, based on the four-level (S0, S1, T1, Tn) scheme of the dye with chemically active triplet states taken into account. It is shown that the rate constants of the chemical reaction involving higher triplet states in the dyes studied amount to (3.9 — 18.6) × 106 s-1 and exceed the analogous values for the reaction involving the first lower triplet states by nine orders of magnitude. The rate of reaction involving the first triplet states appeared to be higher by one — two orders of magnitude than that in the case of higher triplet states involved because of low population of the latter. The possible mechanism of dye bleaching with participation of chitosan that consists in reduction of the dye to the leuco form by transfer of hydrogen from the chitosan matrix is discussed.

Смотреть статью,
Scopus,
WoS,
Читать в сети ИФ

Публикация на русском языке Лазерный фотолиз флуороновых красителей в хитозановой матрице [Текст] / Е. А. Слюсарева [и др.] // Квант. электроника : Физический институт им. П.Н.Лебедева РАН, 2012. - Т. 42 № 8. - С. 687-692

Держатели документа:
[Slyusareva, E. A.
Sizykh, A. G.
Gerasimova, M. A.
Slabko, V. V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Myslivets, S. A.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Slyusareva, E. A.; Sizykh, A. G.; Gerasimova, M. A.; Slabko, V. V.; Слабко, Виталий Васильевич; Myslivets, S. A.; Мысливец, Сергей Александрович
}
Найти похожие
16.


   
    The effect of halogen substitution on the structure and electronic spectra of fluorone dyes / E. A. Slyusareva [et al.] // Opt. Spectrosc. - 2012. - Vol. 112, Is. 5. - P. 671-678, DOI 10.1134/S0030400X12040194. - Cited References: 44. - This work was supported by the FTsP Kadry GK-P333 and by the Siberian Branch of the Russian Academy of Sciences (Integration project no. 2). We are grateful to the Joint Supercomputer Center of the Russian Academy of Sciences (Moscow) and to the Complex of High-Performance Computations of the IKIT of Siberian Federal University. E. A. Slyusareva acknowledges support from the German Academic Exchange Service and the Ministry of Education and Science of the Russian Federation (the program "Mikhail Lomonosov II") of scientific research at the University of Regensburg and in the Helmholtz Center in Berlin (Germany). . - ISSN 0030-400X
РУБ Optics + Spectroscopy
Рубрики:
POLARIZABLE CONTINUUM MODEL
   BORIC-ACID GLASS

   XANTHENE DYES

   FLUORESCEIN DERIVATIVES

   DELAYED FLUORESCENCE

   EOSIN-Y

   ABSORPTION

   PHOSPHORESCENCE

   TRANSITIONS

   EXCITATION

Аннотация: By means of the B3LYP density functional method with the use of the polarized continuum model PCM, we have performed quantum-chemical computations of the electronic absorption and fluorescence spectra of fluorone dianions: fluorescein, dibromofluorescein, eosin, erythrosine, and Rose Bengal in vacuum and methanol. We have revealed conformational features of the structure of fluorone dianions (charge redistribution, changes in the bond lengths and angles between bonds) second by the halogen substitution, the transition from the ground state to an excited state, and the change of the solvent (vacuum-methanol). Absorption and fluorescence wavelengths, constant dipole moments, transition dipole moments, and oscillator strengths have been calculated. We have showed that, upon halogenation of fluorones, the absorption spectra are redshifted and the Stokes shift decreases, which is qualitatively consistent with experimental results.

Смотреть статью,
Scopus,
WoS,
Читать в сети ИФ

Публикация на русском языке Влияние галогензамещения на структуру и электронные спектры флуороновых красителей [Текст] / Е. А. Слюсарева [и др.] // Оптика и спектроскопия : Наука, 2012. - Т. 112 № 5. - С. 729-737

Держатели документа:
[Slyusareva, E. A.
Tomilin, F. N.
Sizykh, A. G.
Tankevich, E. Yu.
Kuzubov, A. A.
Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Tomilin, F. N.
Ovchinnikov, S. G.] Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Slyusareva, E. A.; Tomilin, F. N.; Томилин, Феликс Николаевич; Sizykh, A. G.; Tankevich, E. Y.; Kuzubov, A. A.; Кузубов, Александр Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
Найти похожие
17.


   
    Oxidation of Ag nanoparticles in aqueous media: Effect of particle size and capping / Y. L. Mikhlin [et al.] // Appl. Surf. Sci. - 2014. - Vol. 297. - P. 75-83, DOI 10.1016/j.apsusc.2014.01.081. - Cited References: 58. - This work was partially financially supported by the Ministry of Education and Science of RF (Grant 8580) and RFBR (12-03-31178). . - ISSN 0169-4332. - ISSN 1873-5584
   Перевод заглавия: Окисление наночастиц Ag в водной среде: Влияние размера частиц и оболочки.
РУБ Chemistry, Physical + Materials Science, Coatings & Films + Physics, Applied + Physics, Condensed Matter
Рубрики:
EX-SITU XPS
   POLYCRYSTALLINE SILVER ELECTRODES

   RAY PHOTOELECTRON-SPECTROSCOPY

   METAL NANOPARTICLES

   ELECTROCHEMICAL OXIDATION

   ABSORPTION SPECTROSCOPY

   PYROLYTIC-GRAPHITE

   OXYGEN-ADSORPTION

   TRANSFORMATIONS

   DISSOLUTION

Кл.слова (ненормированные):
Silver nanoparticles -- Oxidation -- Resistive switching effect -- X-ray photoelectron spectroscopy
Аннотация: Many applications and environmental impact of silver-bearing nanomaterials critically depend upon their specific reactivity, which is still poorly understood. Here, silver nanoparticles (Ag NPs) of about 3-5 nm and 10-12 nm in diameter, uncapped and capped with l-glucose or citrate, were prepared, characterized using UV-vis absorption spectroscopy, SAXS, TEM, and their (electro) chemical oxidation was examined in comparison with each other and bulk metal applying scanning tunneling microscopy and spectroscopy, cyclic voltammetry, and XPS. A resistive switching effect was found in the tunneling spectra measured in air at the smaller uncapped Ag NPs deposited on HOPG and was interpreted in terms of Ag transfer between the particle and the probe. The anodic oxidation of these Ag NPs in 1 M NaOH yielded 3D Ag2O, while only a layer of "primary"Ag(I) oxide emerged on larger uncapped nanoparticles during the potential sweep. The formation of AgO at higher potentials proceeded readily at the "primary"oxide but was retarded at the smaller NPs. The citrate- and glucose-capping substantially impeded the formation both of Ag2O and AgO. The findings highlighted, particularly, a non-trivial effect of particle size and transient mobilization of Ag species on the reactions of silver nanoparticles. (c) 2014 Elsevier B.V. All rights reserved.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk 630090, Russia
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Mikhlin, Y. L.; Vishnyakova, E. A.; Romanchenko, A. S.; Saikova, S. V.; Сайкова, С. В.; Likhatski, M. N.; Larichev, Y. V.; Tuzikov, F. V.; Zaikovskii, V. I.; Zharkov, S. M.; Жарков, Сергей Михайлович
}
Найти похожие
18.


   
    Ellipsometric technique for determining in situ the absorption coefficient of semiconducting nanolayers / N. N. Kosyrev [et al.] // Tech. Phys. - 2014. - Vol. 59, Is. 5. - P. 736-739, DOI 10.1134/S1063784214050144. - Cited References: 17. - This work was supported financially by the Ministry of Education and Science of the Russian Federation (state contract no. 14.513.11.0016, agreement nos. 14.132.21.1709 and 14.V37.21.1276), the Program Supporting Leading Scientific Schools (project no. NSh-1044.2012.2), Russian Foundation for Basic Research (project no. 13-02-01265), Physics Division, Russian Academy of Sciences (program no. 2.4.1), Presidium of the Russian Academy of Sciences (program no. 23.34), Siberian-Far East Branches, Russian Academy of Sciences (project no. 85), and integration project no. 38 of the Siberian Branch, Russian Academy of Sciences. . - ISSN 1063-7842. - ISSN 1090-6525
РУБ Physics, Applied
Рубрики:
LAYERS
Аннотация: An algorithm that makes it possible to solve the inverse problem of ellipsometry aimed at determining the absorption coefficient on the basis of a single-zone ellipsometric experiment during the growth of thin semiconducting films is developed and implemented. The technique is based on analysis of the variation of ellipsometric parameters I and Delta directly during the growth. The algorithm is tested in synthesis of Si/SiO2/Si(100) and Hg1 - x Cd (x) Te structures.

Смотреть статью,
Scopus,
WoS,
Читать в сети ИФ

Публикация на русском языке Эллипсометрическая методика определения показателя поглощения полупроводниковых нанослоев in situ [Текст] / Н. Н. Косырев [и др.] // Журн. техн. физ. : Санкт-Петербургская издательская фирма "Наука" РАН, 2014. - Т. 84 Вып. 5. - С. 109-112

Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Novosibirsk State Univ, Novosibirsk 630090, Russia
Russian Acad Sci, Inst Semicond Phys, Siberian Branch, Novosibirsk 630090, Russia
Reshetnikov Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Kosyrev, N. N.; Косырев, Николай Николаевич; Shvets, V. A.; Mikhailov, N. N.; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Rykhlitskii, S. V.; Yakovlev, I. A.; Яковлев, Иван Александрович; Ministry of Education and Science of the Russian Federation [14.513.11.0016, 14.132.21.1709, 14.V37.21.1276]; Program Supporting Leading Scientific Schools [NSh-1044.2012.2]; Russian Foundation for Basic Research [13-02-01265]; Physics Division, Russian Academy of Sciences [2.4.1]; Presidium of the Russian Academy of Sciences [23.34]; Siberian-Far East Branches, Russian Academy of Sciences [85]; Siberian Branch, Russian Academy of Sciences [38]
}
Найти похожие
19.


   
    Infrared absorption spectrum of HoFe3(BO3)4 crystal / S. N. Sofronova [et al.] // Vib. Spectrosc. - 2014. - Vol. 72. - P. 20-25, DOI 10.1016/j.vibspec.2014.02.005. - Cited References: 18. - The work was partially supported by the RFBR through Grants No. 13-02-00825 and 13-02-98041, SS-4828.2012.2. . - ISSN 0924-2031. - ISSN 1873-3697
РУБ Chemistry, Analytical + Chemistry, Physical + Spectroscopy
Рубрики:
MAGNETOELASTIC INTERACTIONS
   IRON

   GDFE3(BO3)4

Кл.слова (ненормированные):
Holmium ferroborate -- Infrared absorption
Аннотация: Infrared (IR) absorption spectra of HoFe3(BO3)4 crystal have been obtained in spectral range 30–7000 cm−1 at temperatures from 4 to 423 K. Vibrational frequencies have been simulated with ‘Lady’ software package both for high-temperature and low-temperature phases. The experimental spectra have been analyzed on the basis of calculated data, and interpreted within the framework of internal vibrations of ionic complexes of HoFe3(BO3)4 crystal lattice. The spectral range under study was observed to have no Davydov splitting of internal vibrational modes due to unit cell multiplication. No effects of magnetic ordering on the IR spectra of the crystal under study were observed in the low-temperature range.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Держатели документа:
Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660079, Russia

Доп.точки доступа:
Sofronova, S. N.; Софронова, Светлана Николаевна; Gerasimova, Y. V.; Герасимова, Юлия Валентиновна; Vtyurin, A. N.; Втюрин, Александр Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Shestakov, N. P.; Шестаков, Николай Петрович; Ivanenko, A. A.; Иваненко, Александр Анатольевич; RFBR [13-02-00825, 13-02-98041, SS-4828.2012.2]
}
Найти похожие
20.


   
    Atomic structure and physical properties of fused porphyrin nanoclusters / P. V. Avramov [et al.] // J. Porphyr. Phthalocyanines. - 2014. - Vol. 18, Is. 7. - P. 552-568, DOI 10.1142/S1088424614500291. - Cited References: 66. - This work was supported by JAEA Research fellowship (P. V. A.). P. V. A. also acknowledges JAEA ASRC and Molecular Spintronics Group for hospitality and fruitful collaboration. This work was supported by the Russian Scientific Foundation, Project No. 14-13-00139. Authors are grateful for Prof. S. G. Ovchinnikov for fruitful discussions. . - ISSN 1088-4246. - ISSN 1099-1409
РУБ Chemistry, Multidisciplinary
Рубрики:
AUGMENTED-WAVE METHOD
   HOLONOMIC QUANTUM COMPUTATION

   INITIO MOLECULAR-DYNAMICS

   VAPOR ABSORPTION SPECTRA

   BORON-NITRIDE NANOTUBES

   ELECTRONIC-STRUCTURE

   REDOX REACTIONS

   EXCITED-STATES

   SPIN-STATES

   GRAPHENE

Кл.слова (ненормированные):
nanoclusters -- fused porphyrins -- electronic structure -- mechanical properties
Аннотация: The atomic and electronic structures, mechanical properties and potential barriers of formation of a set of meso–meso β–β fused porphyrin/metalloporphyrin nanopages, nanotapes, nanotubes and 2D nanofabrics were studied by GGA LC-DFT technique using cluster and PBC models. The porphyrin pages of the nanoclusters are connected with each other by graphene fragments formed by meso–meso β–β links. Fusion of all the edges of six porphyrin/metalloporphyrin units produces a novel ~ 1 nm sized molecule of cubic symmetry with a hollow cage inside. It was found that all studied nanoclusters are metastable with formation energies 0.36–7.57 kcal/mol per atom. Under applied mechanical stress, the nanoclusters exhibit superelastic and ultrastrong properties with binding graphene fragments being the weakest links for mechanical rupture. Depending on the spin-dependent reaction pathways, the hollow caged nanoclusters exhibit almost zero or low potential energy barriers (1–10 kcal/mol) during the initial stages of self-assembly. All nanoclusters exibit the main features of the electronic structures of the parent porphyrins, in particular the nature of HOMO/LUMO states and the relative energetic positions of the metal d states. The induced curvature of the hollow cage nanoclusters leads to admixture of more than 2% of the dπ⊥ states to the dσ energy region and formation of vacant superatomic molecular orbitals of d character in cubic ligand field. The Fe-derived hollow-caged nanoclusters reveal extremely high spin states with small energy differences between ferromagnetic and antiferromagnetic configurations, which can be utilized for quantum holonomic computations.

Смотреть статью,
Scopus,
WOS
Держатели документа:
Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan
LV Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Tomsk State Univ, Tomsk 634050, Russia

Доп.точки доступа:
Avramov, P. V.; Аврамов, Павел Вениаминович; Kuzubov, A. A.; Кузубов, Александр Александрович; Sakai, S.; Ohtomo, M.; Entani, S.; Matsumoto, Y.; Eleseeva, N. S.; Елисеева, Наталья Сергеевна; Pomogaev, V. A.; Naramoto, H.; JAEA Research fellowship; Russian Scientific Foundation [14-13-00139]
}
Найти похожие
 1-20    21-40   41-60   61-80   81-100   101-120      
 

Другие библиотеки

© Международная Ассоциация пользователей и разработчиков электронных библиотек и новых информационных технологий
(Ассоциация ЭБНИТ)