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Altunin, R. R.
Kinetics of diffusion and phase formation in a solid-state reaction in Al/Au thin films / R. R. Altunin, E. T. Moiseenko, S. M. Zharkov // J. Alloys Compd. - 2024. - Vol. 1002. - Ст. 175500, DOI 10.1016/j.jallcom.2024.175500. - Cited References: 83. - This work was supported by the Russian Science Foundation (grant # 22-13-00313) . - ISSN 0925-8388. - ISSN 1873-4669
Кл.слова (ненормированные):
Thin films -- Solid-state reaction -- Al-Au intermetallic compounds -- In situ electron diffraction -- Phase transformation -- Kinetics
Аннотация: The kinetics of diffusion and formation of Al-Au intermetallic compounds in a solid-state reaction between layers of aluminum and gold has been studied by the method of in situ electron diffraction. The phase sequence in the solid-state reaction in Al/Au thin films is found to depend on the atomic ratio of aluminum and gold at the initial state. Specifically, with the atomic ratio being Al:Au=2:1, one observes the formation sequence: Al3Au8→AlAu2→Al2Au, while with the ratio Al:Au=1:4, the sequence is Al3Au8→AlAu4. The observed change in the sequence is explained using the theoretical model of EHF (Effective Heat of Formation). The kinetic parameters of the diffusion of gold through the layer of reaction products in the Al/Au thin films have been determined, including the apparent activation energy of the diffusion Ea=1.17 eV and pre-exponential factor D0=120 cm2/s. Based on the data obtained by in situ electron diffraction, the kinetic parameters of the phase formation have been estimated by the Kissinger-Akahira-Sunose method. In addition, the kinetic parameters of the formation of the Al-Au intermetallic compounds have been determined (apparent activation energy Ea, pre-exponential factor A) in the solid-state reaction in the Al/Au thin films, namely, Ea = 0.77 eV, log(A, s−1) = 9 for Al3Au8; Ea = 1.08 eV, log(A, s−1) = 13 for AlAu2; Ea = 1.13 eV, log(A, s−1) = 13 for Al2Au; and Ea = 1.35 eV, log(A, s−1) = 16 for the phase AlAu4. The kinetic parameters of the formation of the AlAu4 phase have been estimated for the first time.

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Держатели документа:
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50/38, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Moiseenko, E. T.; Zharkov, S. M.; Жарков, Сергей Михайлович
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Barinov, G. I.
Influence of high-pressure thermal-treatment on the phase compound and phase-transformation kinetics of a system magnetite-wustite / G. I. Barinov, Y. V. Babkin // Izvestiya vysshikh uchebnykh zavedenii Fizika. - 1990. - Vol. 33, Is. 5. - P. 95-96 ; Russian Physics Journal ; Известия высших учебных заведений. Физика. - Cited References: 4 . - ISSN 0021-3411

РУБ Physics, Multidisciplinary

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Доп.точки доступа:
Babkin, Y. V.

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Biodegradable polyhydroxyalkanoates formed by 3- and 4-hydroxybutyrate monomers to produce nanomembranes suitable for drug delivery and cell culture / T. G. Volova, A. V. Demidenko, A. V. Murueva [et al.] // Technologies. - 2023. - Vol. 11, Is. 4. - Ст. 106, DOI 10.3390/technologies11040106. - Cited References: 116. - his research was funded by State Assignment of the Ministry of Science and Higher Education of the Russian Federation (project No. 0287-2021-0025) . - ISSN 2227-7080
Кл.слова (ненормированные):
degradable polyhydroxyalkanoates -- copolymers P(3HB-co-4HB) -- electrostatic molding -- membranes -- microstructure and properties -- drugs -- release kinetics -- antibacterial activity -- fibroblast proliferation
Аннотация: Biodegradable polyhydroxyalkanoates, biopolymers of microbiological origin, formed by 3- and 4-hydroxybutyrate monomers P(3HB-co-4HB), were used to obtain nanomembranes loaded with drugs as cell carriers by electrospinning. Resorbable non-woven membranes from P(3HB-co-4HB) loaded with ceftazidime, doripinem, and actovegin have been obtained. The loading of membranes with drugs differently affected the size of fibers and the structure of membranes, and in all cases increased the hydrophilicity of the surface. The release of drugs in vitro was gradual, which corresponded to the Higuchi and Korsmeyer-Peppas models. Antibiotic-loaded membranes showed antibacterial activity against S. aureus and E. coli, in which growth inhibition zones were 41.7 ± 1.1 and 38.6 ± 1.7 mm for ceftazidime and doripinem, respectively. The study of the biological activity of membranes in the NIH 3T3 mouse fibroblast culture based on the results of DAPI and FITC staining of cells, as well as the MTT test, did not reveal a negative effect despite the presence of antibiotics in them. Samples containing actovegin exhibit a stimulating effect on fibroblasts. Biodegradable polyhydroxyalkanoates formed by 3-hydroxybutyrate and 4-hydroxybutyrate monomers provide electrospinning non-woven membranes suitable for long-term delivery of drugs and cultivation of eukaryotic cells, and are promising for the treatment of wound defects complicated by infection.

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Держатели документа:
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, 660036 Krasnoyarsk, Russia
Institute of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi av., 660041 Krasnoyarsk, Russia
Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50 Akademgorodok, 660036 Krasnoyarsk, Russia
L.V. Kirensky Institute of Physics, 50/12 Akademgorodok, 660036 Krasnoyarsk, Russia
Chemistry Engineering Centre, ITMO University, Kronverkskiy Prospekt, 49A, 197101 Saint Petersburg, Russia

Доп.точки доступа:
Volova, Tatiana G.; Demidenko, Aleksey V.; Murueva, Anastasiya V.; Dudaev, Alexey E.; Nemtsev, I. V.; Немцев, Иван Васильевич; Shishatskaya, Ekaterina I.
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Biodegradable polymer casting films for drug delivery and cell culture / A. V. Murueva, A. E. Dudaev, E. I. Shishatskaya [et al.] // Giant. - 2024. - Vol. 19. - Ст. 100314, DOI 10.1016/j.giant.2024.100314. - Cited References: 112. - The study was funded by State Assignment of the Ministry of Science and Higher Education of the Russian Federation (project No. FWES-2021–0025) . - ISSN 2666-5425
Кл.слова (ненормированные):
Degradable polyhydroxyalkanoates -- Copolymers P(3HB--3HV) and P(3HB--4HB) -- Solvent casting films -- Microstructure and properties -- Drugs -- Release kinetics -- Antibacterial activity -- Keratinocytes proliferation
Аннотация: In this work, for the first time, films were obtained based on biodegradable polyhydroxyalkanoates (PHAs) - a copolymer of 3-hydroxybutyrate-co-3-hydroxyvalerate P(3HB-co-3HV) and a copolymer of 3-hydroxybutyrate-co-4-hydroxybutyrate P(3HB-co-4HB), containing drugs of different chemical structure and action - antibiotics (ceftazidime, doripenem), antiseptic (chlorhexidine) and tissue regeneration stimulator (Actovegin) for drug delivery and cell culture. Using SEM, AFM and measuring the contact angles of water wetting, it is shown how PHAs composition and loading of films of P(3HB-co-3HV) and P(3HB-co-4HB) with drugs affect the porosity, roughness indicators and adhesive properties of the surface. The constructed films are a depot form of drug, the release of which in vitro is realized for a long time, without burst releases, corresponds to Korsmeyer-Peppas and Higuchi models with diffusion character. Films loaded with antibiotics have pronounced antibacterial activity and suppress the development of pathogens S. aureus and E. coli, without a pronounced negative effect on the adhesion and proliferation of epidermal cells. In the cultures of human keratinocytes HaCaT it was shown that the presence of actovegin, as well as ceftazidime in the films, exhibits a stimulating effect, increasing their number. The results demonstrate the suitability of the depot-films for cellular technologies and are promising for the reconstruction of tissues complicated by infection.

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Держатели документа:
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk 660036, Russia
Siberian Federal University, 79 Svobodnyi av., Krasnoyarsk 660041, Russia
Infochemistry Scientific Centre, ITMO University, Lomonosova St. 9, St. Petersburg 191002, Russia
Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50 Akademgorodok, Krasnoyarsk, 660036, Russia
L.V. Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Science Center SB RAS, 50/12 Akademgorodok, Krasnoyarsk, 660036, Russia

Доп.точки доступа:
Murueva, A. V.; Dudaev, A. E.; Shishatskaya, E. I.; Ghorabe, F. D. E.; Nemtsev, I. V.; Немцев, Иван Васильевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Volova, T. G.
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Gluck, M.
A quantum cable car for Wannier-Stark ladders / M. . Gluck, A. R. Kolovsky, H. J. Korsch // Phys. Lett. A. - 2000. - Vol. 276, Is. 1-4. - P. 167-174, DOI 10.1016/S0375-9601(00)00656-3. - Cited References: 13 . - ISSN 0375-9601

РУБ Physics, Multidisciplinary
Рубрики:
DYNAMIC LOCALIZATION
   BLOCH PARTICLE
   AC FIELDS
   DC
   STATES
   STATISTICS
   LIFETIME
Кл.слова (ненормированные):
Wannier-Stark ladder -- induced transitions -- Induced transitions -- Wannier-Stark ladder -- article -- energy -- oscillation -- quantum mechanics -- time -- transport kinetics
Аннотация: This Letter studies the dynamics of transitions between the levels of a Wannier-Stark ladder induced by a resonant periodic driving. The analysis of the problem is done in terms of resonance quasienergy states, which take into account the metastable character of the Wannier-Stark states. It is shown that the periodic driving creates from a localized Wannier-Stark state an extended Bloch-like state with a spatial length varying in time as similar to t(1/2). Such a state can find applications in the field of atomic optics because it generates a coherent pulsed atomic beam. (C) 2000 Elsevier Science B.V. All rights reserved.

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Держатели документа:
Univ Kaiserslautern, Fachbereich Phys, D-67653 Kaiserslautern, Germany
LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Fachbereich Physik, Universitat Kaiserslautern, D-67653 Kaiserslautern, Germany
L.V. Kirensky Institute of Physics, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Kolovsky, A. R.; Коловский, Андрей Радиевич; Korsch, H. J.
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Influence of solid acidity on growth kinetics, structure and magnetic properties of CoP films during chemical deposition / A. V. Chzhan, S. A. Podorozhnyak, R. Yu. Rudenko // Euro-asian symposium "Trends in magnetism" (EASTMAG-2019) : Book of abstracts / чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 2. - Ст. J.P38. - P. 254-255. - Cited References: 3 . - ISBN 978-5-9500855-7-4

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Krasnoyarsk State Agrarian University, the Russian Federation, Krasnoyarsk
Siberian Federal University, Krasnoyarsk, Russia

Доп.точки доступа:
Ovchinnikov, S. G. \чл. конс. ком.\; Овчинников, Сергей Геннадьевич; Volkov, N. V. \чл. конс. ком.\; Волков, Никита Валентинович; Dzebisashvili, D. M. \чл. прогр. ком.\; Дзебисашвили, Дмитрий Михайлович; Chzhan, A. V.; Чжан, Анатолий Владимирович; Podorozhnyak, S. A.; Rudenko, R. Yu.; Руденко, Роман Юрьевич; Российская академия наук; Уральское отделение РАН; Институт физики металлов им. М. Н. Михеева Уральского отделения РАН; Уральский федеральный университет им. первого Президента России Б.Н. Ельцина; Российский фонд фундаментальных исследований; Euro-Asian Symposium "Trends in MAGnetism"(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg); "Trends in MAGnetism", Euro-Asian Symposium(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg)
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Influence of solution acidity on growth kinetics, structure and magnetic properties of Co-P films, obtained by chemical deposition / A. V. Chzhan [et al.] // J. Phys. Conf. Ser. - 2019. - Vol. 1389, Is. 1. - Ст. 012116, DOI 10.1088/1742-6596/1389/1/012116. - Cited References: 21 . - ISSN 1742-6588. - ISSN 1742-6596
Аннотация: The results of studies of the effect of solution acidity on the growth kinetics, structure and magnetic properties of Co-P films obtained by chemical deposition are presented. It was shown that the growth of Co-P films in the low pH region occurs mainly due to the growth of crystallite sizes, and in the high pH region, due to an increase in the nucleation rate. From the analysis of the chemical equilibrium of redox reactions, taking into account the balance of citrate and hydroxyl complexes of Co, a qualitative explanation of the features of the change in the rate and nature of the deposition of Co atoms from pH is proposed.

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Держатели документа:
Siberian Federal University, 660041 Krasnoyarsk, avenue Svobodny 79, Russian Federation
Krasnoyarsk State Agrarian University, 660049 Krasnoyarsk, avenue Mira 90, Russian Federation
Kirensky Institute of Physics FIC KNC SB of the RAS, 660036 Krasnoyarsk, Akademgorodok 50, building number 38, Russian Federation

Доп.точки доступа:
Chzhan, A. V.; Podorozhnyak, S. A.; Patrin, G. S.; Патрин, Геннадий Семёнович; Rudenko, R. Yu.; Руденко, Роман Юрьевич; Onufrienok, V. V.; Euro-Asian Symposium "Trends in MAGnetism"(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg)
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Intermediate-spin state of a 3D ion in the octahedral environment and generalization of the Tanabe - Sugano diagrams / K. V. Lamonova [et al.] // The Journal of Physical Chemistry A (Dynamics, Kinetics, Environmental Chemistry, Spectroscopy, Structure, Theory). - 2011. - Т. 115, № 46. - P13596-13604, DOI 10.1021/jp2071265 . - ISSN 1089-5639. - ISSN 1520-5215

РИНЦ
Держатели документа:
L. V. Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences
O. O. Galkin Donetsk Institute for Physics and Engineering,National Academy of Sciences of Ukraine

Доп.точки доступа:
Lamonova, K.V.; Zhitlukhina, E.S.; Babkin, R.Y.; Orel, S.M.; Pashkevich, Y.G.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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Karpov, S. V.
The role of the electron tunneling effect in the coagulation kinetics of polydisperse metal nanocolloids / S. V. Karpov, P. N. Semina, A. P. Gavrilyuk // Colloid J. - 2012. - Vol. 74, Is. 3. - P. 305-312, DOI 10.1134/S1061933X12030052. - Cited References: 16. - Authors are thankful to G. A. Chiganova for discussions and helpful comments. Studies were carried out with the support of grants: the Presidium of RAS No 29 and No 31, OFN RAS III.9.5, IP SB RAS No 43, IP SB RAS (and SFU) No 101. . - ISSN 1061-933X

РУБ Chemistry, Physical
Рубрики:
PARTICLES
Аннотация: The energy of pair interactions between metal nanoparticles of different sizes is shown to be able to increase upon coagulation due to the additional electrostatic effect resulting from mutual heteropolar charging of the particles. The tunnel electron transfer occurring upon the collisions between particles of different sizes may be the reason for the charging. The transfer is caused by the dependence of the electron work function on the particle size. The electron transfer through the interparticle gap equalizes the Fermi levels in particles of different sizes and is associated with this dependence. Using the example of bimodal silver nanocolloids, it is shown that mutual heteropolar charging of particles with different sizes may accelerate the coagulation of polydisperse colloidal systems by an order of magnitude or more as compared with monodisperse systems, in which this effect is absent.

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Публикация на русском языке Карпов, Сергей Васильевич. Роль электронного туннельного эффекта в кинетике коагуляции полидисперсных наноколлоидов металлов [Текст] / С. В. Карпов, П. Н. Сёмина, А. П. Гаврилюк // Коллоид. журн. - М. : Наука, 2012. - Т. 74 № 3. - С. 329-336

Держатели документа:
[Karpov, S. V.
Semina, P. N.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Karpov, S. V.] Siberian Fed Univ, Krasnoyarsk 660028, Russia
[Gavrilyuk, A. P.] Russian Acad Sci, Siberian Branch, Inst Computat Modeling, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Semina, P. N.; Семина, Полина Николаевна; Gavrilyuk, A. P.; Карпов, Сергей Васильевич
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10.

    Kinetic study of a solid-state reaction in Ag/Al multilayer thin films by in situ electron diffraction and simultaneous thermal analysis / S. M. Zharkov, R. R. Altunin, V. V. Yumashev [et al.] // J. Alloys Compd. - 2021. - Vol. 871. - Ст. 159474, DOI 10.1016/j.jallcom.2021.159474. - Cited References: 47. - This work was supported by the Russian Science Foundation, Russia under grant #181300 080 . - ISSN 0925-8388. - ISSN 1873-4669
   Перевод заглавия: Исследование кинетики твердофазной реакции в мультислойных тонких пленках Ag/Al методами in situ дифракции электронов и синхронного термического анализа

РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering
Рубрики:
STRUCTURAL PHASE-TRANSFORMATIONS
COMMITTEE RECOMMENDATIONS
ICTAC KINETICS
Кл.слова (ненормированные):
Thin films -- Intermetallic compound -- Solid-state reaction -- Phase transformations -- Kinetic model -- Activation energy
Аннотация: A solid-state reaction process in Ag/Al multilayer thin films has been investigated by the methods of in situ electron diffraction, simultaneous thermal analysis, transmission electron microscopy and X-ray diffraction with the aim of studying the phase formation kinetics of intermetallic compounds. The sequence of the phase transformations in the solid-state reaction has been established: Ag+Al→(Ag)+(Al)→(Ag)+δ-Ag2Al→μ-Ag3Al. The process of the solid-state interaction has been shown to consist of two steps; each of them is described by a kinetic model of the nth order reactions with autocatalysis. The kinetic parameters of the autocatalytic process of the phase formation for δ-Ag2Al and µ-Ag3Al, have been determined, in particular, their apparent activation energy: 126 kJ/mol and 106 kJ/mol, respectively.

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Держатели документа:
Siberian Fed Univ, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.
RAS, Kirensky Inst Phys, SB, Fed Res Ctr,KSC, Akademgorodok 50-38, Krasnoyarsk 660036, Russia.
RAS, Inst Chem & Chem Technol, SB, Fed Res Ctr,KSC, Akademgorodok 50-24, Krasnoyarsk 660036, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarskij Rabochij 31, Krasnoyarsk 660037, Russia.

Доп.точки доступа:
Zharkov, S. M.; Жарков, Сергей Михайлович; Altunin, R. R.; Yumashev, V. V.; Moiseenko, E. T.; Belousov, O. V.; Solovyov, L. A.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Zeer, G. M.; Russian Science Foundation, RussiaRussian Science Foundation (RSF) [181300 080]
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