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In Situ FMR Study of the Selective H2S-Oxidation Stability of ε-Fe2O3/SiO2 Catalysts / S. S. Yakushkin [et al.] // Appl. Magn. Reson. - 2019. - Vol. 50, Is. 5. - P. 725-733, DOI 10.1007/s00723-019-1109-3. - Cited References:32. - This work was supported by the Russian Science Foundation, project no. 17-12-01111. . - ISSN 0937-9347. - ISSN 1613-7507

РУБ Physics, Atomic, Molecular & Chemical + Spectroscopy
Рубрики:
HYDROGEN-SULFIDE
   CALCINATION TEMPERATURE
   OXIDATION
   PHASE
   BED
Аннотация: The stability of a catalyst for partial H2S oxidation has been studied by the ferromagnetic resonance (FMR) technique combined with transmission electron microscopy, X-ray diffraction, Mössbauer spectroscopy, and magnetostatic investigations. The ε-Fe2O3 iron oxide nanoparticles supported on silica have been examined for their stability under the selective H2S oxidation conditions. The combination of the physicochemical methods has been used to study the state of reacted catalysts. The ε-Fe2O3 phase has been found to remain stable under the selective H2S oxidation conditions at temperatures up to 300 °C. The active phase state during the catalytic reaction has been explored using in situ FMR experiments. It has been established that the ε-Fe2O3 nanoparticles retain their structure and magnetic properties in the presence of H2S at high temperatures. During the in situ FMR experiments, the ε-Fe2O3 sulfidation process has been studied.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Lavrentieva 5, Novosibirsk 630090, Russia.
RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Yakushkin, S. S.; Bukhtiyarova, G. A.; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Knyazev, Yu. V.; Князев, Юрий Владимирович; Balaev, D. A.; Балаев, Дмитрий Александрович; Martyanov, O. N.; Russian Science Foundation [17-12-01111]
}
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Decoration of carbon nanomaterial powders with dispersed platinum metal particles / V. G. Isakova [et al.] // Russ. J. Appl. Chem. - 2018. - Vol. 91, Is. 7. - P. 1209-1216, DOI 10.1134/S1070427218070212. - Cited References: 22. - The study was performed with the support and equipment of the Center for Shared Use of the Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences. . - ISSN 1070-4272. - ISSN 1608-3296

РУБ Chemistry, Applied
Рубрики:
NANOPARTICLES
   PALLADIUM
   FULLERENE
   ELECTRODE
   NANOTUBES
   OXIDATION
Кл.слова (ненормированные):
carbon nanomaterials -- platinum metal nanoparticles -- in situ one-step method
Аннотация: Carbon nanomaterials (fullerite, detonation nanodiamonds, Taunit, fullerenol, fullerene-containing black) were decorated with platinum group metal nanoparticles in situ in one step by low-temperature combustion (~250–270°С) of a powdered mixture of platinum metal acetylacetonate [Pt-M(асас)n, Pt-М = Pt(II), Pd(II), Rh(III), Ir(III), acac = CH3COCHCOCH3, n is the oxidation state of Pt-М] with carbon nanomaterials in air. As shown by thermal analysis, the process is based on thermal oxidative degradation of the organometallic complex, catalyzed by carbon nanomaterials, with oxidation (combustion) of the organic moiety and release of the metal into the condensed phase. The thermal process in an open system occurs in the glowing mode (210–250°С); the size of the nanoparticles formed is 7–30 nm. Under the conditions restricting the air access to the reaction mixture and free outflow of gaseous products formed by oxidation of acac ligands, the nanoparticle size decreases to 3–10 nm. The particle size depends on the metal amount in the initial powder mixture and on the support morphology.

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Публикация на русском языке Декорирование порошков углеродных наноматериалов дисперсными частицами платиновых металлов [Текст] : статья / В. Г. Исакова [и др.] // Журн. прикл. химии. - 2018. - Т. 91 № 7. - С. 1040-1048

Держатели документа:
Russian Acad Sci, Kirenksy Inst Phys, Separate Dept, Fed Res Ctr,Krasnoyarsk Sci Ctr,Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Fed Res Ctr, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Isakova, V. G.; Исакова, Виктория Гавриловна; Osipova, I. V.; Осипова, Ирина Владимировна; Dudnik, A. I.; Дудник, Александр Иванович; Cherepakhin, A. V.; Черепахин, Александр Владимирович; Zharikova, N. V.; Nemtsev, I. V.; Volochaev, M. N.; Center for Shared Use of the Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences
}
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    Состав, структура и реакционная способность при восстановлении водородом композиционных материалов системы α-Fe2O3–CaFe2O4 / В. В. Юмашев [и др.] // Журнал СФУ. Химия. - 2019. - Т. 12, Вып. 1. - С. 54-72 ; J. Sib. Fed. Univ. Chem., DOI 10.17516/1998-2836-0108. - Библиогр.: 37 . - ISSN 1998-2836. - ISSN 2313-6049
   Перевод заглавия: Composition, Structure and Reduction Reactivity of Composite Materials of the α-Fe2O3-CaFe2O4 System by Hydrogen

РУБ Chemistry, Multidisciplinary
Рубрики:
CHEMICAL LOOPING GASIFICATION
OXYGEN CARRIER
PARTIAL OXIDATION
Кл.слова (ненормированные):
твердофазный синтез -- феррит кальция -- РФА -- СЭМ-ЭДС -- термопрограммируемое восстановление водородом -- solid-phase synthesis -- calcium ferrite -- XRD -- SEM-EDS -- temperature-programmed reduction by hydrogen
Аннотация: В работе изучены композиционные материалы системы α-Fe2O3-CaFe2O4, полученные методом высокотемпературного твердофазного синтеза из оксидов Са и Fe(III) с вариацией мольного отношения СаО/Fe2O3 от 0.15 до 1.00. Материалы охарактеризованы методами рентгеновской дифракции (РФА), сканирующей электронной микроскопии с системой энергодисперсионного микроанализа (СЭМ-ЭДС) и синхронного термического анализа (СТА) в режиме термопрограммируемого восстановления водородом (H2-ТПВ). СЭМ-ЭДС - исследование образцов выявило формирование сложной микроструктуры материала по типу «ядро-оболочка» с фазой гематита в качестве «ядра». H2-ТПВ образцов позволило установить, что с увеличением содержания фазы CaFe2O4 (от 33.4 до 97.5 мас. %) наблюдается снижение вклада низкотемпературных форм решеточного кислорода в областях 350-510 °С (до 2.6 раза) и 510-650 °С (до 1.7 раза) и рост вклада высокотемпературной формы кислорода в интервале 650-900 °С (до 2 раз). На основе оценки подвижности решеточного кислорода высказано предположение о перспективности использования полученных композиционных материалов с содержанием фазы CaFe2O4 более 55.2 мас. % в качестве носителей кислорода в химических циклических процессах получения синтез-газа.
In this paper, α-Fe2O3–CaFe2O4 composite materials obtained by high-temperature solid-phase synthesis from Ca and Fe (III) oxides with varying molar ratio CaO/Fe2O3 in the range 0.15-1.00 were investigated. The materials are characterized by Х-ray diffraction (XRD), scanning electron microscopy with energy-dispersive X-ray microanalysis (SEM-EDS) and simultaneous thermal analysis (STA) in the hydrogen temperature-programmed reduction mode (H2-TPR). SEM-EDS studies of the specimens were revealed a formation of the “core-shell” type complex microstructure of material with the hematite phase as the “core”. H2-TPR of the specimens allowed to establish a decrease of the contribution of low-temperature forms of lattice oxygen in areas of 350-510 °С (up to 2.6 times) and 510-650 °С (up to 1.7 times), and the growth of the contribution of the high-temperature oxygen form in the range of 650-900 °С (up to 2 times) with an increase in the content of the phase CaFe2O4 from 33.4 to 97.5 wt. %. Relying on the assessment of lattice oxygen mobility, it was suggested, that the samples with content of CaFe2O4 phase more than 55.4 wt. % are promising for use as oxygen carriers in chemical looping processes of syngas production.

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Держатели документа:
FRC Krasnoyarsk Sci Ctr SB RAS, Inst Chem & Chem Technol SB RAS, 50-24 Akademgorodok, Krasnoyarsk 660036, Russia.
FRC Krasnoyarsk Sci Ctr SB RAS, Kirensky Inst Phys SB RAS, 50-38 Akademgorodok, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Юмашев, Владимир Витальевич; Yumashev, Vladimir V.; Кирик, Надежда Павловна; Kirik N. P.; Шишкина, Нина Николаевна; Shishkina, Nina N.; Князев, Юрий Владимирович; Knyazev, Yu. V.; Жижаев, Анатолий Михайлович; Zhyzhaev, A. M.; Соловьев, Леонид Александрович; Solov'ev, L. A.

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    Reactivity and Chemical Sintering of Carey Lea Silver Nanoparticles / S. Vorobyev [et al.] // Nanomaterials. - 2019. - Vol. 9, Is. 11. - Ст. 1525, DOI 10.3390/nano9111525. - Cited References: 46. - This research was funded by Russian Science Foundation, grant number 18-73-00142. . - ISSN 2079-4991
   Перевод заглавия: Реакционная способность и химическое спекание наночастиц серебра “Carey Lea”
Кл.слова (ненормированные):
silver nanoparticles -- Carey Lea colloid -- citrate-derived capping -- X-ray photoelectron spectroscopy -- SEM -- oxidation -- sulfidation -- sintering
Аннотация: Carey Lea silver hydrosol is a rare example of very concentrated colloidal solutions produced with citrate as only protective ligands, and prospective for a wide range of applications, whose properties have been insufficiently studied up to now. Herein, the reactivity of the immobilized silver nanoparticles toward oxidation, sulfidation, and sintering upon their interaction with hydrogen peroxide, sulfide ions, and chlorocomplexes of Au(III), Pd(II), and Pt(IV) was investigated using SEM and X-ray photoelectron spectroscopy (XPS). The reactions decreased the number of carboxylic groups of the citrate-derived capping and promoted coalescence of 7 nm Ag NPs into about 40 nm ones, excluding the interaction with hydrogen peroxide. The increased nanoparticles form loose submicrometer aggregates in the case of sulfide treatment, raspberry-like micrometer porous particles in the media containing Pd(II) chloride, and densely sintered particles in the reaction with inert H2PtCl6 complexes, probably via the formation of surface Ag-Pt alloys. The exposure of Ag NPs to HAuCl4 solution produced compact Ag films along with nanocrystals of Au metal and minor Ag and AgCl. The results are promising for chemical ambient temperature sintering and rendering silver-based nanomaterials, for example, for flexible electronics, catalysis, and other applications.

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Держатели документа:
Federal Research Center Krasnoyarsk Scientific Center, Institute of Chemistry and Chemical Technology of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50/24, 660036 Krasnoyarsk, Russia
Department of Chemistry and The Smalley-Curl Institute, Rice University, 6100 Main Street, Houston, TX 77005, USA
Federal Research Center Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50, 660036 Krasnoyarsk, Russia

Доп.точки доступа:
Vorobyev, S.; Vishnyakova, E.; Likhatski, M.; Romanchenko, A.; Nemtsev, I. V.; Немцев, Иван Васильевич; Mikhlin, Yu.
}
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    High-temperature oxidation of europium (II) sulfide / Y. G. Denisenko [et al.] // J. Ind. Eng. Chem. - 2019. - Vol. 79. - P. 62-70, DOI 10.1016/j.jiec.2019.05.006. - Cited References: 68. - The authors are grateful for the support from RFBR ( 18-02-00754 , 18-08-00985 , and 18-32-20011 ). This study was also supported by the Russian Science Foundation (project 19-42-02003 , in part of conceptualization). . - ISSN 1226-086X
   Перевод заглавия: Высокотемпературное окисление сульфида европия (II)
Кл.слова (ненормированные):
Sulfur-containing europium compounds -- High-temperature oxidation -- Thermal analysis -- X-ray diffraction -- Crystal structure -- Photoluminescence
Аннотация: The process of high-temperature oxidation of EuS in the air was explored in the temperature range of 500–1000 °C. The oxidation reaction enthalpy was determined (ΔH0exp = −1718.5 kJ/mol). The study of oxidation products allowed to establish the mechanism of EuS oxidation with oxygen. At 500–600 °C, EuS is oxidized to a mixture of Eu3+-containing compounds (Eu3S4, Eu2O2S). In the range of 700–1000 °C, only europium oxysulfate Eu2O2SO4 is formed. The structure refinement for Eu2O2SO4 was performed by the Rietveld method. The luminescence intensity of europium oxysulfate Eu2O2SO4 with characteristic 4f-4f transitions from the 5D0 state was investigated as a function of oxidation temperature.

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Держатели документа:
Department of Inorganic and Physical Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation
Department of General and Special Chemistry, Industrial University of Tyumen, Tyumen, 625000, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Laboratory of Coherent Optics, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, 630090, Russian Federation
Functional Electronics Laboratory, Tomsk State University, Tomsk, 634050, Russian Federation
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation
Laboratory of Chemistry of Rare Platinum Metals, Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk, 630090, Russian Federation
Department of General Chemistry, Northern Trans-Ural Agricultural University, Tyumen, 625003, Russian Federation

Доп.точки доступа:
Denisenko, Y. G.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Krylov, A. S.; Крылов, Александр Сергеевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Atuchin, V. V.; Azarapin, N. O.; Plyusnin, P. E.; Sal'nikova, E. I.; Andreev, O. V.
}
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MYAGKOV, V. G.
AUTO-WAVE PROCESS OF OXIDATION OF IRON FILMS / V. G. MYAGKOV, G. I. FROLOV // Pisma Zhurnal Tek. Fiz. - 1990. - Vol. 16, Is. 23. - P. 1-4. - Cited References: 5 . - ISSN 0320-0116

РУБ Physics, Applied

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Доп.точки доступа:
FROLOV, G. I.
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Fransson, J.
Effects of nonorthogonality in the time-dependent current through tunnel junctions / J. . Fransson, O. . Eriksson, I. . Sandalov // Phys. Rev. B. - 2001. - Vol. 64, Is. 15. - Ст. 153403, DOI 10.1103/PhysRevB.64.153403. - Cited References: 20 . - ISSN 0163-1829

РУБ Physics, Condensed Matter
Рубрики:
LOCAL OXIDATION
TRANSPORT
DEVICES
Аннотация: A theoretical technique which allows one to include contributions from nonorthogonality of the electron states in the leads connected to a tunneling junction is derived. The theory is applied to a single-barrier, tunneling structure and a simple expression for the time-dependent tunneling current is derived showing explicit dependence of the overlap. The overlap proves to be necessary for a better quantitative description of the tunneling current, and our theory reproduces experimental results substantially better compared to standard approaches.

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Держатели документа:
Univ Uppsala, Condensed Matter Theory Grp, S-75121 Uppsala, Sweden
Linkoping Univ, Dept Phys, S-58183 Linkoping, Sweden
RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Eriksson, O.; Sandalov, I. S.; Сандалов, Игорь Семёнович
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    Weak localization and size effects in thin In2O3 films prepared by autowave oxidation / I. A. Tambasov [et al.] // Physica E. - 2016. - Vol. 84. - P. 162-167, DOI 10.1016/j.physe.2016.06.005. - Cited References:70. - This study was supported by the Russian Foundation for Basic Research (Grants # 16-32-00302 MOJI_a, # 15-02-00948-A, # 16-03-00069-A), by the Council for Grants of the President of the Russian Federation (SP-317.2015.1), and by the Program of Foundation for Promotion of Small Enterprises in Science and Technology (No. 6662 Gamma Y2015, 9607 Gamma Y/2015) ("UMNIK" Program). Electron microscopic studies were performed on the equipment of CCU KSC SB RAS. . - ISSN 1386-9477. - ISSN 1873-1759
   Перевод заглавия: Слабая локализация и размерные эффекты в тонких пленках In2O3 приготовленные автоволновым окислением

РУБ Nanoscience & Nanotechnology + Physics, Condensed Matter
Рубрики:
SOLID-STATE SYNTHESIS
   INDIUM TIN OXIDE
   DOPED ZNO FILMS
   OPTICAL-PROPERTIES
   MAGNETIC-FIELD
   NEGATIVE MAGNETORESISTANCE
   CARBON NANOTUBES
   TEMPERATURE
   SEMICONDUCTOR
   TRANSPORT
Кл.слова (ненормированные):
Thin indium oxide films -- Weak localization -- Electron-electron -- interaction -- Disordered semiconductors -- Nanostructured films -- Phase-coherent length
Аннотация: The negative magnetoresistance of thin In2O3 films, obtained by an autowave oxidation reaction, was detected within a temperature range of 4.2-80 K. The magnetoresistance was -1.35% at a temperature of 4.2 K and an external magnetic field of 1 T. A weak localization theory was used to explain the negative magnetoresistance and to determine the phase-coherence length in a temperature range of 4.2-80 K. The phase-coherence length was found to oscillate as the temperatures increased to around 30 K. From the maximum and minimum values of the oscillation of the phase-coherence length, it was suggested that the In2O3 film has two structure characteristic parameters. Transmission electron microscopy showed the structure of the thin In2O3 film to have structural features of a crystal phase- amorphous phase. It was found that the crystalline phase characteristic size was consistent with the maximum phase-coherence length and the amorphous phase characteristic size was consistent with the minimum phase-coherence length. It has been suggested that the temperature measurements of the magnetoresistance and the theory of weak localization can be used to evaluate the structural features of nanocomposite or nanostructured thin films. (C) 2016 Elsevier B.V. All rights reserved.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Akademgorodok 50, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Svobodny Prospect 79, Krasnoyarsk 660041, Russia.
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk Worker 31, Krasnoyarsk 660014, Russia.

Доп.точки доступа:
Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Tarasov, A. S.; Тарасов, Антон Сергеевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Myagkov, V. G.; Мягков, Виктор Григорьевич; Bykova, L. E.; Быкова, Людмила Евгеньевна; Zhigalov, V. S.; Жигалов, Виктор Степанович; Matsynin, A. A.; Мацынин, Алексей Александрович; Tambasova, E. V.; Russian Foundation for Basic Research [16-32-00302 MOJI_a, 15-02-00948-A, 16-03-00069-A]; Council for Grants of the President of the Russian Federation [SP-317.2015.1]; Program of Foundation for Promotion of Small Enterprises in Science and Technology ("UMNIK" Program) [6662GammaY2015, 9607GammaY/2015]
}
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Thermal oxidation of a carbon condensate formed in high-frequency carbon and carbon-nickel plasma flow / G. N. Churilov [et al.] // Tech. Phys. - 2018. - Vol. 63, Is. 2. - P. 216-219, DOI 10.1134/S1063784218020093. - Cited References:12. - Transmission electron microscopy investigations were carried out on equipment of the Omsk Regional Center of Collective Use of the Siberian Branch of the Russian Academy of Sciences. This study was supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, and the Krasnoyarsk Territorial Foundation for the Support of Scientific and R&D Activities, project no. 16-43-242148. . - ISSN 1063-7842. - ISSN 1090-6525

РУБ Physics, Applied
Рубрики:
FULLERENES
OXIDE
METAL
Аннотация: We have reported on the comparative characteristics of thermal oxidation of a carbon condensate prepared by high-frequency arc evaporation of graphite rods and a rod with a hollow center filled with nickel powder. In the latter case, along with different forms of nanodisperse carbon, nickel particles with nickel core-carbon shell structures are formed. It has been found that the processes of the thermal oxidation of carbon condensates with and without nickel differ significantly. Nickel particles with the carbon shell exhibit catalytic properties with respect to the oxidation of nanosized carbon structures. A noticeable difference between the temperatures of the end of the oxidation process for various carbon nanoparticles and nickel particles with the carbon shell has been established. The study is aimed at investigations of the effect of nickel nanoparticles on the dynamics of carbon condensate oxidation upon heating in the argon-oxygen flow.

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Публикация на русском языке Термоокисление углеродного конденсата, полученного в потоке ВЧ углеродной и углеродно-никелевой плазмы [Текст] / Г. Н. Чурилов [и др.] // Журн. техн. физ. - 2018. - Т. 88 Вып. 2. - С. 224–227

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Inst Problems Hydrocarbon Proc, Siberian Branch, Omsk 644040, Russia.
Russian Acad Sci, Inst Solid State Chem & Mechanochem, Siberian Branch, Novosibirsk 630128, Russia.

Доп.точки доступа:
Churilov, G. N.; Чурилов, Григорий Николаевич; Nikolaev, N. S.; Николаев, Никита Сергеевич; Cherepakhin, A. V.; Dudnik, A. I.; Дудник, Александр Иванович; Tomashevich, E. V.; Trenikhin, M. V.; Bulina, N. G.; Russian Foundation for Basic Research; Government of Krasnoyarsk Territory; Krasnoyarsk Territorial Foundation for the Support of Scientific and RD Activities [16-43-242148]
}
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10.

    Temperature-dependent photoconductance and optical properties of In2O3 thin films prepared by autowave oxidation / I. A. Tambasov [et al.] // J. Sib. Fed. Univ. Math. Phys. - 2017. - Vol. 10, Is. 4. - P. 399-409 ; Журн. СФУ. Сер. "Математика и физика", DOI 10.17516/1997-1397-2017-10-4-399-409. - Библиогр.: 49. - This study was supported by the Russian Foundation for Basic Research (Grants no. 16-32- 00302 mon_a, no. 15-02-00948-A, no. 16-03-00069-A), by the Council for Grants of the President of the Russian Federation (SP-317.2015.1), by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project no. 16-42-243059 p_mon_a, no. 16-42-243006 p_mon_a and no. 16-48-242092 p_m, and by the program of Foundation for Promotion of Small Enterprises in Science and Technology (no. 6662y2015, 9607y/2015). . - ISSN 1997-1397
   Перевод заглавия: Температурная зависимость фотопроводимости и оптические свойства тонких пленок In2O3, полученных методом автоволнового окисления
Кл.слова (ненормированные):
Autowave oxidation -- In2O3 thin films -- Photoconductance
Аннотация: The influences of ultraviolet (UV) irradiation and temperature on the electrical and optical properties in In2O3 films obtained by autowave oxidation were measured experimentally. The film resistance changed slightly for temperatures from 300 to 95 K, and more noticeably when the temperature was further decreased, measured in the dark. Under UV irradiation, the resistivity of the films at room temperature decreased sharply by ~25% and from 300 to 95 K, and continued to decrease by ~38% with a further decreasing temperature. When the UV source was turned off, the resistivity relaxed at a rate of 15 Ω/s for the first 30 seconds and 7 Ω/s for the remaining time. The transmittance decreased by 3.1% at a wavelength of 6.3 m after the irradiation ceased. The velocity of the relaxation transmittance was 0.006 %/s. The transmittance decreased by 3.1% at a wavelength of 6.3 µm after the irradiation ceased. The velocity of the relaxation transmittance was 0.006 %/s. The relaxation of the electrical resistance and transmittance after UV irradiation termination were similar. It was assumed that the dominant mechanism responsible for the change in the conductivity in the indium oxide films during UV irradiation was photoreduction.
Экспериментально исследовано влияние ультрафиолетового (УФ) излучения и температуры на электрические и оптические свойства пленок In2O3, полученных методом автоволнового окисления. При измерении в темноте сопротивление пленки менялось незначительно при температурах от 300 до 95 К и более заметно при дальнейшем уменьшении температуры. Под воздействием УФ–облучения удельное сопротивление пленок при комнатной температуре резко снизилось на 25 %, от 300 до 95 К, и продолжало снижаться до 38% с дальнейшим понижением температуры. При отключении УФ–источника значение сопротивления релаксировало со скоростью 15 Ом/с в течение первых 30 секунд и 7 Ом/с в течение оставшегося времени. После прекращения облучения коэффициент пропускания снизился на 3,1% при длине волны 6,3 мкм. Скорость релаксации коэффициента пропускания составила 0,006 %/с. Релаксации электрического сопротивления и коэффициента пропускания после прекращения УФ–облучения были одинаковыми. Предполагается, что доминирующим механизмом, ответственным за изменения проводимости в пленках оксида индия в процессе УФ-облучения, было фотовосстановление.

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Держатели документа:
Kirensky Institute of Physics SB RAS, Akademgorodok, 50/38, Krasnoyarsk, Russian Federation
Krasnoyarsk Scientific Center SB RAS, Akademgorodok 50, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodny 79, Krasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarskii Rabochii, 31, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Myagkov, V. G.; Мягков, Виктор Григорьевич; Ivanenko, A. A.; Иваненко, Александр Анатольевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Voronin, A. S.; Ivanchenko, F. S.; Tambasova, E. V.

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