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1.


    Kirik, S. D.
    Monitoring MCM-41 synthesis by X-ray mesostructure analysis / S. D. Kirik, V. A. Parfenov, S. M. Zharkov // Micropor. Mesopor. Mater. - 2014. - Vol. 195. - P. 21-30, DOI 10.1016/j.micromeso.2014.04.012. - Cited References: 70. - The investigation was made with financial support of the Program of Presidium RAS (Project 24.37), RF State contracts No 02.740.11.0629, RFBR Grants: 11-03-00610a and 11-03-12161-ofi, RSF 14-13-000025. . - ISSN 1387-1811. - ISSN 1873-3093
   Перевод заглавия: Контроль синтеза МСМ-41 с помощью рентгеновского мезоструктурного анализа
РУБ Chemistry, Applied + Chemistry, Physical + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary
Рубрики:
ORDERED MESOPOROUS MATERIALS
   ORDERED MESOPOROUS MATERIALS

   IN-SITU

   POWDER DIFFRACTION

   SILICA/SURFACTANT COMPOSITES

   ELECTRON-MICROSCOPY

   MOLECULAR-SIEVES

   STABLE MCM-41

   SILICA

   ADSORPTION

Кл.слова (ненормированные):
Hydrothermal stability -- MCM-41 -- Mesostructure -- TEM -- X-ray diffraction
Аннотация: The electron density maps calculated from X-ray diffraction patterns of the mesoporous silica material MCM-41 present averaged mesostructure images which in contrast to transmission electron microscopy (TEM) images are exceptionally repeating and represent the whole sample. It was shown that the averaged mesostructure parameters such as a unit cell parameter, a pore diameter, a wall width, a pore shape estimated from the X-ray powder diffraction data in combination with the continuous electron density function approach allow monitoring continuous set of the silica framework states at different stages of the material synthesis. The mentioned technique supplemented by N 2-adsorption measurements and transmission electron microscopy was applied for consideration of the MCM-41 hydrothermal stability. Attention has been given to the variations of the synthesis conditions affecting the hydrothermal stability, in particular the maintaining the basicity of the synthesis solution as well the substitution of the synthesis solution with water or a salt solution at hydrothermal treatment. The averaged pore shape was observed to be changed from cylindrical to hexagonal-prismatic form. The observed wall thickness was in the range from 0.75 to 1.25 nm. The competition of silica polycondensation and surface hydrolysis was shown to be responsible for the variety of framework geometry and hydrothermal stability. It has been established that the pore diameter increases generally due to the osmotic pressure of water. If the pores acquire the average prismatic hexagonal shape, the sample has low hydrothermal stability. Under the conditions favorable for the polycondensation the pores have averaged cylindrical shape and material demonstrates higher hydrothermal stability. Cooperative mechanism of mesostructure destruction under hydrothermal conditions was observed using TEM data and was discussed in connection with irregular polycondensation. © 2014 Elsevier Inc. All rights reserved.

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Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Inst Chem & Chem Technol SB RAS, Krasnoyarsk 660036, Russia
Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Parfenov, V. A.; Zharkov, S. M.; Жарков, Сергей Михайлович
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2.


    Frolov, G. I.
    Phase composition of nanocrystalline iron films deposited in a nitrogen atmosphere / G. I. Frolov, V. S. Zhigalov, O. A. Bayukov // Phys. Solid State. - 1999. - Vol. 41, Is. 10. - P. 1669-1671, DOI 10.1134/1.1131050. - Cited References: 14 . - ISSN 1063-7834
РУБ Physics, Condensed Matter
Рубрики:
ELECTRON-MICROSCOPY
   MOSSBAUER

Аннотация: The phase composition of iron films prepared by pulsed-plasma deposition in a controlled nitrogen atmosphere is investigated by Mossbauer spectroscopy. The observed changes in the phase composition are dictated by the nanocrystalline structure of the samples and the dynamics of the substrate temperature during film deposition. (C) 1999 American Institute of Physics. [S1063-7834(99)02110-3].

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Публикация на русском языке Фролов, Георгий Иванович. Фазовый состав нанокристаллических пленок железа, осажденных в атмосфере азота [Текст] / Г. И. Фролов, В. С. Жигалов, О. А. Баюков // Физ. тверд. тела. - Санкт-Петербург, 1999. - Т. 41 Вып. 10. - С. 1819-1821

Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Zhigalov, V. S.; Жигалов, Виктор Степанович; Bayukov, O. A.; Баюков, Олег Артемьевич; Фролов, Георгий Иванович
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3.


   
    Spatially resolved GHz magnetization dynamics of a magnetite nano-particle chain inside a magnetotactic bacterium / T. Feggeler, R. Meckenstock, D. Spoddig [et al.] // Phys. Rev. Research. - 2021. - Vol. 3, Is. 3. - Ст. 033036, DOI 10.1103/PhysRevResearch.3.033036. - Cited References: 40. - This work is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) -Project No. OL513/1-1, 321560838, and in part by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) -Project-ID 405553726 TRR 270. M.F. acknowledges support by the government of the Russian Federation (agreement No. 075-15-2019-1886). We gratefully acknowledge A. Ney for fruitful discussions. The use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515 . - ISSN 2643-1564
РУБ Physics, Multidisciplinary
Рубрики:
AQUASPIRILLUM-MAGNETOTACTICUM
   ELECTRON-MICROSCOPY

   SP-NOV

Аннотация: Understanding magnonic properties of nonperiodic magnetic nanostructures requires real-space imaging of ferromagnetic resonance modes with spatial resolution well below the optical diffraction limit and sampling rates in the 5-100 GHz range. Here, we demonstrate element-specific scanning transmission x-ray microscopydetected ferromagnetic resonance (STXM-FMR) applied to a chain of dipolarly coupled Fe3O4 nano-particles (40-50 nm particle size) inside a single cell of a magnetotactic bacterium Magnetospirillum magnetotacticum. The ferromagnetic resonance mode of the nano-particle chain driven at 6.748 GHz and probed with 50 nm x-ray focus size was found to have a uniform phase response but non-uniform amplitude response along the chain segments due to the superposition of dipolar coupled modes of chain segments and individual particles, in agreement with micromagnetic simulations.

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Держатели документа:
Univ Duisburg Essen, Fac Phys, D-47048 Duisburg, Germany.
Univ Duisburg Essen, Ctr Nanointegrat Duisburg Essen CENIDE, D-47048 Duisburg, Germany.
Forschungszentrum Julich, Ernst Ruska Ctr Microscopy & Spect Electrons, D-52425 Julich, Germany.
Forschungszentrum Julich, Peter Grunberg Inst, D-52425 Julich, Germany.
SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA.
Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk, Russia.
Carl von Ossietzky Univ Oldenburg, Sch Math & Sci, D-26129 Oldenburg, Germany.
Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA.

Доп.точки доступа:
Feggeler, Thomas; Meckenstock, Ralf; Spoddig, Detlef; Zingsem, Benjamin W.; Ohldag, Hendrik; Wende, Heiko; Farle, M.; Фарле, Михаель; Winklhofer, Michael; Ollefs, Katharina J.; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)German Research Foundation (DFG) [405553726 TRR 270, OL513/1-1, 321560838]; government of the Russian Federation [075-15-2019-1886]; US Department of Energy, Office of Science, Office of Basic Energy SciencesUnited States Department of Energy (DOE) [DE-AC02-76SF00515]
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