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Extended Discrete Interaction Model: Plasmonic Excitations of Silver Nanoparticles / V. I. Zakomirnyi [et al.] // J. Phys. Chem. C. - 2019. - Vol. 123, Is. 47. - P. 28867-28880, DOI 10.1021/acs.jpcc.9b07410. - Cited References: 64. - H.Å. and V.I.Z. acknowledge the support of the Russian Science Foundation (project no. 18-13-00363). L.K.S. acknowledges the support of Carl Tryggers Stifetelse, project no. CTS 18-441. . - ISSN 1932-7447
Кл.слова (ненормированные):
Aspect ratio -- Geometry -- Nanorods -- Optical properties -- Plasmonics -- Silver nanoparticles
Аннотация: We present a new atomistic model for plasmonic excitations and optical properties of metallic nanoparticles, which collectively describes their complete response in terms of fluctuating dipoles and charges that depend on the local environment and on the morphology of the composite nanoparticles. Being atomically dependent, the total optical properties, the complex polarizability, and the plasmonic excitation of a cluster refer to the detailed composition and geometric characteristics of the cluster, making it possible to explore the role of the material, alloy mixing, size, form shape, aspect ratios, and other geometric factors down to the atomic level and making it useful for the design of plasmonic particles with particular strength and field distribution. The model is parameterized from experimental data and, at present, practically implementable for particles up to more than 10 nm (for nanorods even more), thus covering a significant part of the gap between the scales where pure quantum calculations are possible and where pure classical models based on the bulk dielectric constant apply. We utilized the method to both spherical and cubical clusters along with nanorods where we demonstrate both the size, shape, and ratio dependence of plasmonic excitations and connect this to the geometry of the nanoparticles using the plasmon length.

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Department of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Royal Institute of Technology, Stockholm, SE-10691, Sweden
Federal Siberian Research Clinical Centre under FMBA of Russia, Kolomenskaya 26, Krasnoyarsk, 660037, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Department of Physics, Kaunas University of Technology, Kaunas, LT-51368, Lithuania
College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China

Доп.точки доступа:
Zakomirnyi, V. I.; Закомирный, Вадим Игоревич; Rinkevicius, Z.; Baryshnikov, G. V.; Sorensen, L. K.; Agren, H.
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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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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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Ion exchange recovery of platinum(IV) from hydrochloric acid solutions in the presence of silver(I) / O. N. Kononova, E. V. Duba, A. S. Efimova [et al.] // Russ. J. Phys. Chem. A. - 2020. - Vol. 94, Is. 4. - P. 828-834, DOI 10.1134/S003602442004007X. - Cited References: 35 . - ISSN 0036-0244. - ISSN 1531-863X

РУБ Chemistry, Physical
Рубрики:
GROUP METALS
   SORPTION
   PALLADIUM
   RESINS
Кл.слова (ненормированные):
platinum -- silver -- hydrochloric solutions -- anion exchangers -- sorption
Аннотация: The ion exchange sorption of the platinum(IV) chloride complexes in the presence of silver(I) chloro complexes from 2 and 4 M aqueous solutions of hydrochloric acid is studied on Purolite anion exchangers with different functional groups. The high selectivity of the investigated sorbents with respect to platinum during its recovery from individual hydrochloric acid solutions and in the presence of silver chloride complexes is determined. Since the latter are in this case virtually not sorbed in the presence of platinum(IV), they can be separated at the stage of sorption. The excellent kinetic properties of the investigated anion exchangers are revealed, allowing platinum to be eluted after its separation from silver chloro complexes in a dynamic mode.

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Публикация на русском языке Ионообменное извлечение платины(IV) в присутствии серебра(I) из солянокислых растворов [Текст] / О. Н. Кононова, Е. В. Дуба, А. С. Ефимова [и др.] // Журн. физ. химии. - 2020. - Т. 94 № 4. - С. 602-609

Держатели документа:
Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Kirensky Inst Phys, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Kononova, O. N.; Duba, E. V.; Efimova, A. S.; Ivanov, A. I.; Krylov, A. S.; Крылов, Александр Сергеевич
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Fabrication of Extremely Concentrated Silver Hydrosols without Additional Stabilizers / S. A. Vorobyev, M. N. Likhatski, A. S. Romanchenko [et al.] // ACS Sustain. Chem. Eng. - 2020. - Vol. 8, Is. 46. - P. 17225-17233, DOI 10.1021/acssuschemeng.0c06006. - Cited References: 64. - This research was supported by the Russian Science Foundation, grant 18-73-00142 (S.A.V.). We acknowledge that facilities of the Krasnoyarsk Regional Research Equipment Centre of SB RAS were employed in the work . - ISSN 2168-0485
Кл.слова (ненормированные):
silver nanoparticles -- Carey Lea colloid -- dense hydrosols -- synthesis -- dynamic light scattering -- hydrophilic surfaces
Аннотация: Applications of silver nanoparticles (Ag NPs) in modern technologies require environmentally friendly methods of large-scale production of the nanoparticles with controlled morphology and surface state in the form of high-concentration metal sols with minimal quantities of organic stabilizers. Herein, we report a procedure based on reduction of aqueous silver nitrate with ferrous sulfate in the presence of citrate ions. We studied the effect of various factors on the chemical reaction by applying transmission electron microscopy, ultraviolet-visible absorption spectroscopy, and dynamic light scattering (DLS) and proposed protocols with reduced quantities of the reagents allowing preparation of uniform spherical Ag NPs of 5 to 15 nm in diameter. A DLS study of sols after dilution was employed to estimate the tendency of colloidal particles to interact in order to optimize post-synthetic purification and concentration procedures. Particularly, filtration instead of centrifugation and electrolytic coagulation with trisodium citrate in place of sodium nitrate were utilized to produce extremely concentrated, more than 1000 g/L Ag, and stable silver hydrosols with no additional stabilizers. The chemical, X-ray photoelectron spectroscopy, and thermogravimetric analyses demonstrated that the Ag NPs contained citrate-derived capping ligands, and low amounts of Fe are appropriated for chemical and low-temperature sintering, surface functionalization, nanofluidics, and other applications.

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Держатели документа:
Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk, 660036, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, 31, Krasnoyarsky Rabochy Av., Krasnoyarsk, 660037, Russian Federation

Доп.точки доступа:
Vorobyev, S. A.; Likhatski, M. N.; Romanchenko, A. S.; Fetisova, O. Y.; Kazachenko, A. S.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Mikhlin, Y. L.; Михлин, Юрий Леонидович
}
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    Влияние реакционных условий на размер наночастиц серебра в концентрированных золях Carey Lea / С. А. Воробьев, М. Н. Лихацкий, А. С. Романченко [и др.] // Журн. СФУ. Химия. - 2020. - Т. 13, № 3. - С. 372-384 ; J. Sib. Fed. Univ. Chem., DOI 10.17516/1998-2836-0190. - Библиогр.: 34. - Работа выполнена при финансовой поддержке Российского научного фонда, грант No 18-73-00142 . - ISSN 1998-2836. - ISSN 2313-6049
   Перевод заглавия: The Influence of the Reaction Conditions on the Size of Silver Nanoparticles in Carey Lea's Concentrated Sols

РУБ Chemistry, Multidisciplinary
Рубрики:
AG NANOPARTICLES
   CITRATE
   AGGREGATION
   SURFACE
   STABILITY
   KINETICS
Кл.слова (ненормированные):
наночастицы серебра -- концентрированные золи -- влияние реакционных условий -- цитрат-ион -- silver nanoparticles -- concentrated sols -- influence of reaction conditions -- citrate ion
Аннотация: В данной работе был изучен процесс восстановления растворов Ag (I) цитратными комплексами Fe (II), который позволяет получать наночастицы серебра с высокой стабильностью и концентрацией более 60 г/л. В ходе работы было установлено влияние скорости введения, скорости перемешивания, концентрации реагентов, рН среды и некоторых постсинтетических операций на средний размер наночастиц. Показано, что снижение концентрации Ag (I) и повышение концентрации стабилизатора, доведение рН реакционной среды до 7 позволяют получать наиболее мелкие и однородные частицы. В результате были найдены оптимальные условия, которые дали возможность уменьшить размер частиц и вместе с тем снизить концентрацию реактивов на 33 %. По данным РФЭС, ПЭМ, DLS и ИК были получены наночастицы металлического серебра с размером 6.5±1.8 нм, стабилизированные продуктом частичного распада цитрат-иона.
The reaction of reduction solution of Ag (I) by Fe (II) citrate complex was studied herein. This allows you to receive silver nanoparticles with high stability with a concentration above 60 g/l. It was determined that the nanoparticles size depends on the injection rate, mixing rate, reagent concentration, pH and some post-synthetic operations on the average size of nanoparticles. It was shown that decreasing the concentration of Ag (I) and increasing the concentration of stabilizer also bringing pH to 7 lead to small and uniform particles. Optimal conditions were found that made it possible to reduce particle size and reduce the concentration of reagents by 33 % in the results. According to XPS, TEM, DLS and FTIR datas, nanoparticles of metallic silver with a size of 6.5±1.8 nm were obtained, which stabilized by the product of partial decay of the citrate ion.

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Держатели документа:
Институт химии и химической технологии ФИЦ «Красноярский научный центр СО РАН», Российская Федерация, Красноярск
Сибирский федеральный университет, Российская Федерация, Красноярск
Институт физики им. Киренского, КНЦ СО РАН, Российская Федерация, Красноярск
Сибирский государственный университет науки и технологий им. М.Ф. Решетнева, Российская Федерация, Красноярск

Доп.точки доступа:
Воробьев, С. А.; Лихацкий, М. Н.; Романченко, А. С.; Иваненко, Т. Ю.; Машарова, Д. А.; Волочаев, Михаил Николаевич; Volochaev, M. N.; Михлин, Ю. Л.; RUSSIAN SCIENCE FOUNDATIONRussian Science Foundation (RSF) [18-73-00142]

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Magnetoresistance, magnetoimpedance, magnetothermopower, and photoconductivity in silver-doped manganese sulfides / O. B. Romanova [et al.] // J. Appl. Phys. - 2019. - Vol. 125, Is. 17. - Ст. 175706, DOI 10.1063/1.5085701. - Cited References: 29. - This study was supported by the Russian Foundation for Basic Research (Project No. 18-52-00009 Bel_a). The reported study was funded by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science (Project No. 18-42-240001 r_a), to the research project: "Inversion of the Sign of the Components of the Magnetoelectric Tensor on the Temperature in Films of Bismuth Garnet Ferrite Replaced by Neodymium." This study was carried out in the framework of the state task No. 3.5743.2017/6.7. . - ISSN 0021-8979. - ISSN 1089-7550

РУБ Physics, Applied
Рубрики:
MAGNETIC-PROPERTIES
RESISTIVITY
Аннотация: New multifunction materials in the AgXMn1‒XS (Х = 0.05) system have been synthesized and investigated in the temperature range of 77‒500 K in magnetic fields up to 12 kOe. Near the temperature of the magnetic transition (ТN = 176 K), the anomalous behavior of the temperature dependence of magnetization has been observed and has been attributed to the formation of ferrons. An analysis of the infrared spectroscopy data and I‒V characteristics has revealed the spin-polaron subband splitting. Several conductivity channels have been found from the impedance spectra. The temperature and magnetic field dependences of the carrier relaxation time have been obtained. The magnetoresistance (−21%), magnetoimpedance (−65%), magnetothermopower (−40%), and photoconductivity effects have been detected. The majority carrier type, density, and mobility have been determined from the Hall-effect measurement data. The observed effects have been explained using a ferron model.
Синтезированы и исследованы новые многофункциональные материалы системы AgXMn1-XS (Х=0.05) в интервале температур 77-500К в магнитных полях до 12 кЭ. В близи температуры магнитного перехода (ТN=176К) наблюдается аномальное поведение температурной зависимости намагниченности, вызванное образованием ферронов. Найдено расщепление спин-поляронной подзоны из ИК спектроскопии и вольт-амперных характеристик. Установлено несколько каналов проводимости из спектров импеданса, отличающихся частоте. Определена зависимость времени релаксации носителей заряда от температуры и магнитного поля. Обнаружено четыре эффекта: магнитосопротивление (-21%), магнитоимпеданс (-65%), магнитотермоЭДС (-40%) и фотопроводимость. Найдены: тип, концентрация и подвижность основных носителей заряда из холловских измерений. Обнаруженные эффекты объясняются в модели ферронов.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Dept Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
Siberian State Univ Sci & Technol, Dept Phys, Krasnoyarsk 660014, Russia.
Sci Pract Mat Res Ctr NAS, Minsk 220072, BELARUS.

Доп.точки доступа:
Romanova, O. B.; Романова, Оксана Борисовна; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Udod, L. V.; Удод, Любовь Викторовна; Sitnikov, M. N.; Kretinin, V. V.; Yanushkevich, K. I.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Russian Foundation for Basic Research [18-52-00009 Bel_a]; Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science [18-42-240001 r_a]
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    Bio-hybridization of nanobactericides with cellulose films for effective treatment against members of ESKAPE multi-drug-resistant pathogens / S. Baker [et al.] // Appl. Nanosci. - 2018. - Vol. 8, Is. 5. - P. 1101-1110, DOI 10.1007/s13204-018-0717-9. - Cited References: 51. - Authors are thankful for Ministry of Education and Science of the Russian Federation for providing funding under the scheme of 5-100: Russian Academic Excellence Project. Authors are grateful for facilities provided by Siberian Federal University to carry out the present study. . - ISSN 2190-5509. - ISSN 2190-5517
   Перевод заглавия: Биогибридизация нано-бактерицидов с целлюлозными пленками для эффективного воздействия на представителей группы патогенов ESKAPE, резистентных к различным препаратам

РУБ Nanoscience & Nanotechnology
Рубрики:
SILVER NANOPARTICLES
BACTERIAL CELLULOSE
ANTIBIOTIC-RESISTANCE
Кл.слова (ненормированные):
ESKAPE -- Bio-hybridization -- Silver nanobactericides -- Phytogenic -- Bactericidal activity
Аннотация: The rapid expansion of drug-resistant pathogens has created huge global impact and development of novel antimicrobial leads is one of the top priority studies in the current scenario. The present study aims to develop bio-hybridized nanocellulose films which comprise of phytogenic silver nanobactericides. The nanobactericides were synthesized by treating 1 mM silver nitrate with aqueous extract of Chamerion angustifolium which reduced the metal salt to produce polydispersed nanobactericides which were tested against the members of ESKAPE drug-resistant communities. The synthesized silver nanobactericides were subjected to characterization with UV–visible spectra which displayed maximum absorbance at 408 nm. The bio-molecular interaction of phyto-constituents to mediate synthesis and stabilization of nanobactericides was studied with Fourier-transform infrared spectroscopy (FTIR) which depicted functional groups associated with nanobactericides. The crystalline nature was studied with X-ray diffraction (XRD) which showed Bragg’s intensities at 2θ angle which denoted (111), (200), (220), and (311) planes. The morphological characteristics of silver nanobactericides were defined with transmission electron Microscopy (TEM) image which displayed polydispersity of silver nanobactericides with size ranging from 2 to 40 nm. The synthesized nanobactericides showed a significant activity against MRSA strain with 21 mm zone of inhibition. The minimal inhibitory concentration of silver nanobactericides to inhibit the growth of test pathogens was also determined which ranged between 0.625 and 1.25 μg/ml. The silver nanobactericides were bio-hybridized onto nanocellulose films produced by Komagataeibacter xylinus B-12068 culture strain. The films were dried to determine the mechanical properties which showed increased in Young’s modulus and tensile strength in comparison with control bacterial cellulose films. Overall, the results obtained in the present investigation are promising enough to report bactericidal activity of bio-hybridized nanobactericidal films against ESKAPE. These communities are reported to cause severe threats to all forms of lives irrespective to their habitats which can lead to huge economical crisis.

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Держатели документа:
Siberian Fed Univ, Lab Biotechnol New Mat, Svobodnyy Pr 79, Krasnoyarsk 660041, Russia.
SB RAS, Krasnoyarsk Sci Ctr, Fed Res Ctr, Inst Biophys, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.
Siberian Fed Univ, Sch Fundamental Biol & Biotechnol, Krasnoyarsk, Russia.
Krasnoyasrk State Med Univ, Dept Microbiol, Krasnoyarsk Partizana Zheleznyaka St 1, Krasnoyarsk 660022, Russia.
SB RAS, Fed Res Ctr KSC, Kirensky Inst Phys, Akademgorodok 50,Bld 38, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Sch Petr & Nat Gas Engn, Krasnoyarsk, Russia.

Доп.точки доступа:
Baker, Syed; Volova, Tatiana; Prudnikova, Svetlana V.; Shumilova, Anna A.; Perianova, Olga, V; Zharkov, S. M.; Жарков, Сергей Михайлович; Kuzmin, A. R.; Kondratenka, Olga; Kiryukhin, Bogdan; Shidlovskiy, Ivan P.; Potkina, Zoya K.; Khohlova, Olga Y.; Lobova, Tatiana I.; Ministry of Education and Science of the Russian Federation under the scheme of 5-100: Russian Academic Excellence Project
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Pankin, P. S.
Tunable hybrid Tamm-microcavity states / P. S. Pankin, S. Y.A. Vetrov, I. V. Timofeev // J. Opt. Soc. Am. B. - 2017. - Vol. 34, Is. 12. - P. 2633-2639, DOI 10.1364/JOSAB.34.002633. - Cited References: 50. - Russian Foundation for Basic Research (RFBR), Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund (17-42-240464); Scholarship of the President of the Russian Federation (SP-227.2016.5). P. S. P. acknowledges the support of the Scholarship of the President of the Russian Federation. The authors thank D. N. Gulkin and V. O. Bessonov for help and fruitful discussions. . - ISSN 0740-3224
Кл.слова (ненормированные):
1-D photonic crystal -- Effect of temperature -- External electric field -- High sensitivity -- Isotropic state -- Microcavity modes -- Silver layer -- Transmission spectrums
Аннотация: Spectral manifestations of hybrid Tamm-microcavity modes in a 1D photonic crystal bounded with a silver layer and containing a nematic liquid crystal microcavity layer have been studied using numerical simulation. It is demonstrated that the hybrid modes can be effectively tuned owing to the high sensitivity of the liquid crystal to the temperature and external electric field variations. It is established that the effect of temperature on the transmission spectrum of the investigated structure is most pronounced at the point of the phase transition of the liquid crystal to the isotropic state, where the refractive index jump is observed.

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Держатели документа:
FRC KSC SB RAS, Krasnoyarsk, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, FRC KSC SB RAS, Krasnoyarsk, Russian Federation
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Vetrov, S. Ya.; Ветров, Степан Яковлевич; Timofeev, I. V.; Тимофеев, Иван Владимирович
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Ion-exchange sorption of palladium(II) from hydrochloric acid solutions in the presence of silver(I) / O. N. Kononova [et al.] // Russ. J. Phys. Chem. A. - 2018. - Vol. 92, Is. 10. - P. 2053-2059, DOI 10.1134/S0036024418100138. - Cited References: 36 . - ISSN 0036-0244. - ISSN 1531-863X

РУБ Chemistry, Physical
Рубрики:
PLATINUM-GROUP METALS
   RECOVERY
   COMPLEXES
   CHLORIDE
   PD(II)
Кл.слова (ненормированные):
palladium -- silver -- hydrochloric acid solutions -- sorption -- sorptive extraction
Аннотация: The sorptive extraction of palladium(II) chloride complexes in the presence of silver(I) chloride complexes from 2 and 4 M aqueous solutions of HCl with a series of Purolite anionites with different functional groups is studied. An anion exchange mechanism of sorption is identified from Raman spectroscopy data. Kinetic properties that are inherent to the investigated ionites and allow the elution of palladium(II) and silver(I) after their extraction in a dynamic mode are revealed.

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Публикация на русском языке Ионообменная сорбция палладия (II) в присутствии серебра (I) из солянокислых растворов [Текст] / О. Н. Кононова [и др.] // Журн. физ. химии. - 2018. - Т. 92 № 10. - С. 1641-1647

Держатели документа:
Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Krasnoyarsk 660025, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Kononova, O. N.; Duba, E. V.; Medovikov, D. V.; Krylov, A. S.; Крылов, Александр Сергеевич
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10.

    Phytogenic Synthesis of Ag Bionano-Antibiotics Against ESKAPE Drug Resistant Communities in Krasnoyarsk, Siberia / B. Syed [et al.] // J. Cluster Sci. - 2019. - Vol. 30, Is. 3. - P. 589-597, DOI 10.1007/s10876-019-01518-7. - Cited References: 44. - uthors are thankful for facilities provided by Siberian Federal University to carry out the present study. Authors are grateful to Krasnoyarsk Medical University for providing opportunity to carry out the present study. . - ISSN 1040-7278
   Перевод заглавия: Фитогенный синтез биологических нано-антибиотиков на основе серебра против фармакорезистентных болезнетворных микроорганизмов, распространенных в Красноярске, Россия
Кл.слова (ненормированные):
Heracleum dissectum -- Silver nano-antibiotics -- ESKAPE -- Antimicrobial-resistant -- Krasnoyarsk -- Siberia
Аннотация: The present study reports synthesis of silver nano-antibiotics from aqueous extract of H. dissectum. The nano-antibiotics were characterized using UV–visible spectra which displayed maximum absorbance at 430 nm. The role of phytocomponents as reducing agent and stabilization of silver nano-antibiotics was depicted with Fourier-transform infrared spectroscopy which revealed presence of hydroxyl and carboxyl groups associated with silver nano-antibiotics. The crystalline nature was studied with X-ray diffraction which showed Bragg’s intensities at 2θ angle which denoted (101), (111), (200), (220), (311) planes. The morphological characteristics were studied using Transmission Electron Microscopy to reveal the size ranging from 5 to 50 nm. The bactericidal activity of nano-antibiotics was studied via well diffusion and minimal inhibitory concentration assay against members of drug-resistant communities bearing resistant to more than ten standard antibiotics. Nano-antibiotics displayed highest activity against Ps. aeruginosa strain 55 and Methicillin-resistant Staphylococcus aureus with 16 mm zone of inhibition followed by Kl. pneumoniae strain 104 and E. coli strain 55. Moderate activity was observed against Ac. baumannii strains with 12 mm zone of inhibition. The obtained results envision the role of plant mediated nano-antibiotics as one of the best suited alternatives towards combating drug resistant pathogens.

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Держатели документа:
Department of Microbiology, Krasnoyasrk State Medical University named after Prof. VF. Voino-Yasenetskiy, Partizana-Zheleznyaka Street, 1, Krasnoyarsk, 660022, Russian Federation
Siberian Federal University, Svobodnyy pr., 79, Krasnoyarsk, 660041, Russian Federation
School of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, Russian Federation
Federal Research Center KSC SB RAS, Kirensky Institute of Physics, Akademgorodok 50, Bld. 38, Krasnoyarsk, 660036, Russian Federation
School of Petroleum and Natural Gas Engineering, Siberian Federal University, Krasnoyarsk, Russian Federation
Department of Environmental Sciences, Jozef Stefan Institute, Jamova 39, Ljubljana, 1000, Slovenia
Department of Biotechnology, M. M. Engineering College, Maharishi Markandeshwar University (MMU), Mullana, Ambala, India

Доп.точки доступа:
Syed, B.; Prudnikova, S. V.; Perianova, O. V.; Zharkov, S. M.; Жарков, Сергей Михайлович; Kuzmin, A.; Chouhan, R. S.; Potkina, N. K.; Khohlova, O. Y.; Lobova, T. I.; Singh, M.
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11.

Bio-functionalization of phytogenic Ag and ZnO nanobactericides onto cellulose films for bactericidal activity against multiple drug resistant pathogens / S. Baker [et al.] // J. Microbiol. Methods. - 2019. - Vol. 159. - P. 42-50, DOI 10.1016/j.mimet.2019.02.009. - Cited References: 59 . - ISSN 0167-7012. - ISSN 1872-8359

РУБ Biochemical Research Methods + Microbiology
Рубрики:
SILVER NANOPARTICLES
   ANTIMICROBIAL ACTIVITY
   SIZE
   COMPOSITES
   MEMBRANE
Кл.слова (ненормированные):
Bupleurum aureum -- Rio-functionalization -- Silver nanobactericides -- Zinc oxide nanobactericides -- Multi-drug resistance pathogens -- Bacterial cellulose
Аннотация: The present study describes the synthesis of silver and zinc oxide nanobactericides from the phytogenic source Bupleurum aureum The synthesized nanobactericides were characterized and evaluated for bio-functionalization onto bacterial cellulose membrane which was synthesized by Komagataeibactencylinus B-12068 culture strain. The synthesis of nanobacterides were initially confirmed using UV-Visible spectroscopy which indicated localized surface resonance (LSPR) peaks at 415 nm for silver nanobactericides and 280 nm for zinc nanobactericides. The nature of the capping agent for synthesized nanobactericides was predicted using FTIR which confirmed the presence of functional moieties. XRD analysis revealed their crystalline nature while morphological characteristics were studied using TEM which confirmed the polydispersity of nanobactericides with the average size in the range of 20-25 nm. The nanobactericides were tested for their antimicrobial activity against seven multi-drug resistant pathogens which were clinically isolated from patients suffering from a myriad of microbial infections. The tested pathogens had antimicrobial resistance to ten different antibiotics and have been reported to be the major cause of nosocomial infections. The nanobactericides displayed significant activity against the test pathogens. Silver nanobactericides showed the highest activity against Escherichia coli strain 55 with a 24 mm zone of inhibition while zinc oxide nanobactericides displayed the highest activity against methicillinresistant Staphylococcus aureus (MRSA) with a 20 mm inhibition zone. The bio- functionalized cellulose films (BCF) were characterized using SEM along with physicochemical analysis. The BCF's were evaluated for anti-bacterial activity against test pathogens which resulted in marked antimicrobial potential against multi-drug resistant bacteria and therefore has the potential to be utilized as an efficient alternative to counter drug resistant pathogens.

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Держатели документа:
Siberian Fed Univ, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.
Siberian Fed Univ, Sch Fundamental Biol & Biotechnol, Krasnoyarsk, Russia.
Krasnoyasrk State Med Univ, Dept Microbiol, Krasnoyarsk Partizana Zheleznyakast 1, Krasnoyarsk 660022, Russia.
RAS, KSC SB, Fed Res Ctr, Kirensky Inst Phys, Akademgorodok 50,Bld 38, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Sch Petr & Nat Gas Engn, Krasnoyarsk, Russia.

Доп.точки доступа:
Baker, Syed; Prudnikova, Svetlana V.; Shumilova, Anna A.; Perianova, Olga V.; Zharkov, S. M.; Жарков, Сергей Михайлович; Kuzmin, A.
}
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12.

LixAg1–xGaSe2: interplay between lithium and silver in mid-infrared nonlinear optical chalcogenides / L. Isaenko, L. Dong, A. Kurus [et al.] // Adv. Opt. Mater. - 2022. - Vol. 10, Is. 24. - Ст. 2201727, DOI 10.1002/adom.202201727. - Cited References: 37. - This work was supported by the National Natural Science Foundation of China (Grant No. 22133004), Russian Science Foundation, grant # 19‐12‐00085‐P (crystal growth, crystal structure analysis, band gap measurement) and partly done on state assignment of IGM SB RAS (composition chemical analysis) . - ISSN 2195-1071
Кл.слова (ненормированные):
chalcogenides -- energy band gap -- mid-IR nonlinear optical crystals -- second harmonic generation -- structure analysis
Аннотация: AgGaSe2 and LiGaSe2 are two famous mid-infrared nonlinear optical (NLO) materials with similar chemical formula but different structural symmetry. The former material has relatively larger NLO effect and birefringence but rather small energy band gap, while the latter is the opposite. Aiming at achieving a good balance of NLO properties, here the substitution between silver and lithium ions on the evolution of structural and optical properties in a new series of LixAg1–xGaSe2 crystals is systematically investigated. It reveals that, with the increase of Li content, LixAg1–xGaSe2 almost keeps the same tetragonal symmetry with AgGaSe2 until x ≈ 0.9. The NLO effects and birefringence values vary with respect to x with the largest variation at x = 0.8–0.9. The optimal combination of birefringence (0.03–0.025) and nonlinear parameters (26–30 pm V−1) is achieved at x = 0.4–0.5. As the energy band gap increases with the increase of x, the maximal value of 2.2 eV for chalcopyrite structure suggests that the laser-induced damage threshold of LixAg1–xGaSe2 would be as large as five-fold of AgGaSe2. This study provides a good example to show that the rational substitution between Li and Ag can significantly improve the balance of NLO properties in chalcogenides.

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Держатели документа:
Novosibirsk State University, Novosibirsk, 630090, Russian Federation
Functional Crystal Lab, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
University of Chinese Academy of Sciences, Beijing, 100049, China
L.V. Kirensky Institute of Physics SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Isaenko, L.; Dong, L.; Kurus, A.; Lin, Z.; Yelisseyev, A.; Lobanov, S.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Korzhneva, K.; Goloshumova, A.
}
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13.

Synthesis and synergistic effect of antibacterial composites based on concentrated hydrosols of silver nanoparticles combined with cephalosporins antibiotics / S. A. Vorobyev, G. V. Novikova, A. V. Demina [et al.] // Inorg. Chem. Commun. - 2022. - Vol. 144. - Ст. 109862, DOI 10.1016/j.inoche.2022.109862. - Cited References: 49. - This research was supported by the Russian Science Foundation, project 18-73-00142 . - ISSN 1387-7003
Кл.слова (ненормированные):
Silver nanoparticles -- Concentrated hydrosols -- Cephalosporin antibiotics -- Antibacterial activity -- Minimal inhibitory concentration
Аннотация: Silver nanoparticles may be used as potential antimicrobial agents. Concentrated silver nanoparticles (AgNPs) were synthesised by the Carey Lee method. Then, antibiotics, such as disodium ceftriaxone, sodium cefotaxime, sodium cefazolin and sodium cefoperazone, were added to the AgNPs at the ratio of AgNPs:antibiotic = 5:1. The concentrated hydrosols were examined using UV–Vis, FTIR-spectroscopy, dynamic light scattering and transmission electron microscopy. The spectra plasmon resonance of silver nanoparticles and their combination with antibiotics had a single strong peak at 412–415 nm. The transmission electron microscopy micrographs showed different forms. The average size of AgNPs-antibiotic particles was smaller than that of AgNPs. The antibacterial activities of AgNPs, antibiotics and AgNPs-antibiotics were determined by the disk diffusion method against Staphylococcus aureus and Escherichia coli. The most significant enhancement of the antibacterial effect over the antibiotic was demonstrated by AgNPs-disodium ceftriaxone against E.coli. Also, the minimal inhibitory concentration (MIC) of the AgNPs-antibiotics was defined. All the AgNPs-antibiotic exhibited a synergistic enhancement by AgNPs and the antibiotic of antibacterial activity. A possible explanation of this phenomenon was proposed. Our results suggest that the synthesis of the concentrated hydrosol of the AgNPs-antibiotics is essential for studying similar nanosystems.

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Держатели документа:
Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of sciences, Krasnoyarsk, 660036, Russian Federation
School of Non-Ferrous Metals and Material Science, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
School of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russian Federation

Доп.точки доступа:
Vorobyev, S. A.; Novikova, G. V.; Demina, A. V.; Shidlovskiy, I. P.; Volochaev, M. N.; Волочаев, Михаил Николаевич
}
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14.

Comparative characteristics of alternating current light source with copper and silver electrodes under power samples analysis / Н. Г. Внукова, В. А. Лопатин [et al.] // Современный атомно-эмиссионный анализ и науки о земле : программа и тезисы докл. науч. семинара с междунар. участием, посвящ. 150-летию создания Кирхгофом и Бунзеном основ атом. спектроскопии, 30 июня - 4 июля 2009 г., г. Иркутск / [отв. ред.: Е. В. Шабанова, О. В. Зарубина]. - 2009. - С. 17-18 . - ISBN 978-5-94797-139-2

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

Доп.точки доступа:
Внукова, Наталья Григорьевна; Vnukova, N. G.; Лопатин, Владислав Александрович; Lopatin, V. A.; Осипова, Ирина Владимировна; Osipova, I. V.; Чурилов, Григорий Николаевич; Churilov, G. N.; "Современный атомно-эмиссионный анализ и науки о земле", семинар(2009 ; июнь-июль ; Иркутск); Российская академия наук; Сибирское отделение РАН; Иркутский научынй центр СО РАН; Институт геохимии им. А. П. Виноградова СО РАН
}
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15.

Synthesis and study of superhigh-concentrated organosols of silver nanoparticles / S. A. Vorobyev, M. Yu. Flerko, S. A. Novikova [et al.] // Colloid J. - 2024. - Vol. 86, Is. 2. - P. 208-217, DOI 10.1134/S1061933X23601294. - Cited References: 33. - The work was carried out with the financial support of the basic project FWES-2021-0014 of the Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, and the Federal Program "Priority 2030" using the equipment of the Krasnoyarsk regional center for collective use of the Federal Research Center Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences . - ISSN 1061-933X. - ISSN 1608-3067
Кл.слова (ненормированные):
silver nanoparticles (NPs) -- concentrated silver organosols -- phase transfer of nanoparticles -- X-ray photoelectron spectroscopy (XPS) -- transmission electron microscopy (TEM) -- conductive silver films
Аннотация: Due to their unique properties, organosols of silver nanoparticles are widely used in optical and semiconductor devices, to produce electrically and thermally conductive films, as catalysts, antibacterial materials, etc. This work proposes a simple and highly productive method for the preparation of silver organosols, which have a metal concentration as high as 1800 g/L and contain spherical nanoparticles with low polydispersity and a median size of 9.1 nm. The method consists in the initial preparation of silver nanoparticle hydrosols with a concentration of higher than 30 g/L followed by the transfer of the NPs into an organic phase of o-xylene. A set of physical research methods has been employed to study the regularities of the extraction of silver nanoparticles with o-xylene in the presence of cetyltrimethylammonium bromide (CTAB) and ethanol and to determine the optimal process conditions, under which the extraction degree is as high as 62.5%. It has been found that bromine anions contained in CTAB molecules cause the aggregation of some amount of silver nanoparticles with the formation of silver metal sediment in the aqueous phase. According to X-ray photoelectron spectroscopy data, the sediment contains bromide ions (up to 4 at %) on the particle surface. Organosols synthesized under optimal conditions are stable for more than 7 months and withstand repeated cycles of drying and redispersing. Silver organosols have been used to obtain metal films with an electrical conductivity of about 68 500 S/cm, which increases to 412 000 and 509 500 S/cm (87.8% of the electrical conductivity of bulk silver) after thermal treatment at 150 and 250°C, respectively.

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Держатели документа:
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Tomsk National Research State University, 634050, Tomsk, Russia

Доп.точки доступа:
Vorobyev, S. A.; Flerko, M. Yu.; Novikova, S. A.; Mazurova, E. V.; Tomashevich, Ye. V.; Likhatski, M. N.; Saikova, S. V.; Samoilo, A. S.; Zolotovsky, N. A.; Золотовский, Н. А.; Volochaev, M. N.; Волочаев, Михаил Николаевич
}
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16.

Temperature phase transitions in silver niobate and lithium-tantal-modified silver niobate ceramics / A. S. Krylov, S. N. Krylova, A. N. Vtyurin [et al.] // Phys. Chem. Chem. Phys. - 2023. - Vol. 25, Is. 16. - P. 11410-11417, DOI 10.1039/D3CP00607G. - Cited References: 42. - The work was financially supported by the Russian Foundation for Basic Research and DFG project number No 21-52-12018. The temperature Raman experiments were performed in the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS” . - ISSN 1463-9076. - ISSN 1463-9084
Аннотация: The temperature behaviour of the 0.955 AgNbO3--0.045 LiTaO3and AgNbO3 ceramics were studied in the range from 10 to 415 K by Raman spectroscopy. Ab initio calculations of the Raman spectra in the Pmc21 phase of AgNbO3 were carried out using three potentials (A-PZ, PBE, PBEsol) for spectra interpretation. The Raman spectra peculiarities in AgNbO3 ceramics is observed and explained. The differences in the spectra of the 0.955 AgNbO3--0.045 LiTaO3 and AgNbO3 ceramics are shown. The temperatures of structural changes in the 0.955 AgNbO3--0.45 LiTaO3 and AgNbO3 ceramics were discussed. The structural phase transition below 120 K have been observed in silver niobate. The phase transition has been observed at 310 K and below 150 K in 0.955 AgNbO3--0.045 LiTaO3.

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Держатели документа:
Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
Siberian Federal University, Kirenskogo str. 28, Krasnoyarsk, Russia
Ioffe Institute, Polytekhnicheskaya 26, 194021, St. Petersburg, Russia
Electronic Materials Research Laboratory, International Center for Dielectric Research, Xi’an Jiaotong University, Xi’an, 710049, China

Доп.точки доступа:
Krylov, A. S.; Крылов, Александр Сергеевич; Krylova, S. N.; Крылова, Светлана Николаевна; Vtyurin, A. N.; Втюрин, Александр Николаевич; Roginskii, Evgenii M.; Jin, Li; Tian, Ye; Wei, Xiaoyong
}
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17.

    Processes in resonant domains of metal nanoparticle aggregates and optical nonlinearity of aggregates in pulsed laser fields / A. P. Gavrilyuk, S. V. Karpov // Appl. Phys. B-Lasers Opt. - 2009. - Vol. 97, Is. 1. - P163-173, DOI 10.1007/s00340-009-3592-y. - Cited Reference Count: 43. - Гранты: Authors are thankful to Prof. V. A. Markel ( University of Pennsylvania) for computation of multipole polarizability of silver nanoparticle bispheres, for the attention to this paper, fruitful discussions and great support. This research was supported by grants: 27.1 of the Presidium of RAS, 9.1 DPS RAS, 5 SB RAS, 3818.2008.3 and 6612.2006.3 of the President of RF ( SS RAS), DSP 2.1.1.1814, 05- 03- 32642 RFBR. - Финансирующая организация: [27.1 of the Presidium of RAS]; [9.1 DPS RAS]; [5 SB RAS]; [3818.2008.3]; [6612.2006.3] . - SEP. - ISSN 0946-2171
Рубрики:
SMALL-PARTICLE COMPOSITES
   FRACTAL CLUSTERS
   SELECTIVE PHOTOMODIFICATION
   ABSORPTION-COEFFICIENTS
   REFRACTIVE-INDEXES
   SILVER
   ENHANCEMENT
   RESPONSES
   GOLD
Кл.слова (ненормированные):
Metal nanoparticles -- Nanosecond pulsed laser -- Nonlinear refractive index -- Optical nonlinearity -- Physical effects -- Pulsed-laser field -- Resonant domain -- Silver nanoparticles -- Simple Physical Models -- Aggregates -- Laser excitation -- Nanoparticles -- Nonlinear optics -- Organic polymers -- Pulsed laser applications -- Refractive index -- Silver
Аннотация: Optical nonlinearities in aggregates of nanoparticles formed in silver hydrosols (SHs) are studied under pico- and nanosecond pulsed laser excitation. The dependence of the nonlinear refractive index n (2) on the degree of hydrosol aggregation is studied experimentally at the wavelength lambda=1.064 mu m. It is found that n (2) changes sign when the degree of hydrosol aggregation is increased. Various physical effects occurring in resonant domains of the aggregates are analyzed using a simple physical model of two bound silver nanoparticles. The theory takes into account thermal, elastic, electrostatic, and light-induced effects. Experimental results are discussed in the context of this theory.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Russian Acad Sci, Inst Computat Modeling, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660028, Russia

Доп.точки доступа:
Gavrilyuk, A. P.; Гаврилюк, Анатолий Петрович; Karpov, S. V.; Карпов, Сергей Васильевич
}
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18.

    Synthesis, crystal structures, and properties of new acentric glaserite-related compounds Rb7Ag5–3xSc2+x(XO4)9 (X = Mo, W) / T. S. Spiridonova, S. F. Solodovnikov, M. S. Molokeev [et al.] // J. Solid State Chem. - 2022. - Vol. 305. - Ст. 122638, DOI 10.1016/j.jssc.2021.122638. - Cited References: 71. - This research was supported by the Ministry of Science and Higher Education of the Russian Federation , projects No. 0273-2021-0008 (Baikal Institute of Nature Management, SB RAS), and No. 121031700313-8 (Nikolaev Institute of Inorganic Chemistry, SB RAS), as well as partial financial support from the Russian Foundation for Basic Research (project No. № 20-03-00533) . - ISSN 0022-4596
   Перевод заглавия: Синтез, кристаллическая структура и свойства новых ацентрических соединений Rb7Ag5–3xSc2+x(XO4)9 (X = Mo, W), родственных глазериту
Кл.слова (ненормированные):
Rubidium -- Silver -- Scandium -- Triple molybdate -- Triple tungstate -- Phase equilibria -- Synthesis -- Crystal structure -- Ionic conductivity
Аннотация: The subsolidus phase equilibria in the system Ag2MoO4–Rb2MoO4–Sc2(MoO4)3 were studied and two new triple molybdates, Rb9Ag3Sc2(MoO4)9 and Rb7Ag5Sc2(MoO4)9, were found. The structures of Rb7Ag5Sc2(MoO4)9 and isostructural Rb7Ag5Sc2(WO4)9 of the Cs7Na5Yb2(MoO4)9 type (the space group R32) were determined. The found composition of the triple tungstate crystal, Rb7Ag4.61Sc2.13(WO4)9, indicates a non-stoichiometric compound formula, Rb7Ag5–3xSc2+x(WO4)9. Both structures have one incompletely occupied Ag site, and structure Rb7Ag4.61Sc2.13(WO4)9 also contains two positions with mixed Ag and Sc. Both compounds contain ‘lanterns’ [M2(XO4)9] (M = (Sc, Ag), Sc; X = Mo, W), which are strengthened by three AgO2 dumbbells to give isolated building blocks [Ag3M2(XO4)9] forming two-story hexagonal layers resembling the structure of glaserite K3Na(SO4)2. Similar layers of [Ag3Sc2(WO4)9]9− building blocks were also found by us in the structure of Rb9–xAg3+xSc2(WO4)9, which is close to that of Rb9Ag3Sc2(MoO4)9. Similar layers of the [M2(TO4)9] units were also observed in Cs7Na5Yb2(MoO4)9 and Na13Sr2Ta2(PO4)9. The title compounds belong to the series of rhombohedral triple molybdates and tungstates with a ≈ 9–10 Å and large c-periods (more than 20 Å), which have layered or open 3D framework structures. Like many compounds of this series, Rb7Ag5Sc2(XO4)9 (Х = W, Mo) at elevated temperatures have significant ionic conductivity reaching values 6.1·10−3 S cm−1 at 703 K (X = Mo) and 1.4·10−3 S cm−1 at 733 K (X = W) with Еа = 0.7 eV and 0.6 eV, respectively.

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Держатели документа:
Baikal Institute of Nature Management, Siberian Branch, Russian Academy of Sciences, Sakh'yanova St. 6, Buryat Republic, Ulan-Ude, 670047, Russian Federation
Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Akad. Lavrentyev Ave. 3, Novosibirsk630090, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50 bld.38, Krasnoyarsk, 660036, Russian Federation
Kemerovo State University, Krasnaya St., 6, Kemerovo, 650000, Russian Federation
Skolkovo Institute of Science and Technology, Moscow121205, Russian Federation

Доп.точки доступа:
Spiridonova, T. S.; Solodovnikov, S. F.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Solodovnikova, Z. A.; Savina, A. A.; Kadyrova, Y. M.; Sukhikh, A. S.; Kovtunets, E. V.; Khaikina, E. G.
}
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19.

    Crystal and electronic structure, thermochemical and photophysical properties of europium-silver sulfate monohydrate AgEu(SO4)2·H2O / Y. G. Denisenko, A. E. Sedykh, M. S. Molokeev [et al.] // J. Solid State Chem. - 2021. - Vol. 294. - Ст. 121898, DOI 10.1016/j.jssc.2020.121898. - Cited References: 54. - This work was partially supported by the Russian Foundation for Basic Research (Grant 19-33-90258∖19 ). Use of equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center « Krasnoyarsk Science Center SB RAS» is acknowledged . - ISSN 0022-4596
   Перевод заглавия: Кристаллическая и электронная структура, термохимические и фотофизические свойства моногидрата сульфата европия-серебра AgEu(SO4)2·H2O
Кл.слова (ненормированные):
Structure -- Thermochemistry -- Luminescence -- Sulfates -- Europium
Аннотация: In order to synthesize single crystals of europium-silver double sulfate monohydrate, a hydrothermal reaction route was used. It was found that the crystallization cannot be performed under standard conditions. The compound AgEu(SO4)2·H2O crystallizes in the trigonal crystal system, space group P3221 (a = 6.917(1), c = 12.996(2) Å, V = 538.53(17) Å3). The structure consists of triple-capped trigonal prisms [EuO9], in which one oxygen atom belongs to crystalline water, silver octahedra [AgO6], and sulfate tetrahedra [SO4]. The hydrogen bonds in the system additionally stabilize the structure. The electronic band structure wasstudied by density functional theory calculations which show that AgEu(SO4)2·H2O is an indirect band gap dielectric. Temperature dependent photoluminescence spectroscopy shows emission bands of transitions from the 5D0 state to the spin-orbit components of the 7FJmultiplet (J = 0–6).The ultranarrow transition 5D0 - 7F0 shows a red shift with respect to other europium-containing water-free sulfates that is ascribed to the presence of OH group in the crystal structure in the close vicinity of the Eu3+ ion. An effect of abnormal sensitivity of the Ω4 intensity factor to minor distortions of the local environment is detected for the observed low local symmetry of C2.

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Держатели документа:
Institute of Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation
Institute of Inorganic and Analytical Chemistry, Justus-Liebig-University of Giessen, Giessen35392, Germany
Department of General and Special Chemistry, Industrial University of Tyumen, Tyumen, 625000, Russian Federation
Center for Materials Research (LaMa), Justus-Liebig-University of Giessen, Giessen35392, Germany
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
Komissarov Department of General Chemistry, Northen Trans-Ural Agricultural University, Tyumen, 625003, Russian Federation
Laboratory of the Chemistry of Rare Earth Compounds, Institute of Solid State Chemistry, UB RAS, Ekaterinburg, 620137, Russian Federation

Доп.точки доступа:
Denisenko, Y. G.; Sedykh, A. E.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Krylov, A. S.; Крылов, Александр Сергеевич; Khritokhin, N. A.; Sal'nikova, E. I.; Andreev, O. V.; Muller-Buschbaum, K.
}
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20.

    Antimicrobial properties of nanofiltration membranes modified with silver nanoparticles / R. Khaydarov, O. Gapurova, M. Abdukhakimov [et al.] // Emerg. Mater. - 2022. - Vol. 5, Is. 5. - P. 1477-1483, DOI 10.1007/s42247-021-00330-2. - Cited References: 31. - The SEM and TEM analysis was carried out in the SFU Joint Scientific Center under the support of the Ministry of Science and Higher Education of the Russian Federation (#FSRZ-2020-0011) . - ISSN 2522-5731. - ISSN 2522-574X
   Перевод заглавия: Антимикробные свойства нанофильтрационных мембран, модифицированных наночастицами серебра

РУБ Materials Science, Multidisciplinary

Кл.слова (ненормированные):
Nanofiltration -- Membrane -- Silver -- Nanoparticle -- Antimicrobial -- Biofouling -- Polyhexamethylene biguanide
Аннотация: The growth of bacteria and fungi on a nanofiltration (NF) membrane is known to reduce its permeability and lifetime and increase overall energy use. Over the last decade, application of silver nanoparticles (AgNPs) has shown to present a strong potential in preventing biofouling of NF membrane processes. The paper deals with a novel facile method developed to in situ incorporate nanosilver stabilized with the polyhexamethylene biguanide hydrochloride (PHMB) onto the commercial NF membrane surface. The scanning electron microscopy (SEM) investigations confirmed a uniform distribution of AgNPs on the surface of NF membrane although AgNPs tend to agglomerate into nano-sized colloidal clusters. Our results showed that AgNPs had little impact on the performance of the NF membrane, including salt rejection and water permeation properties. To evaluate the antibacterial properties of nanocomposite membranes, a "time-kill" analysis, a microbiological technique for measuring the change in a population of microorganisms under the impact of a specific sample, has been used against representatives of Gram-positive and Gram-negative bacteria. Inductively coupled mass spectrometry (ICP-MS) was used to study kinetics of Ag release from modified NF membrane. Leaching rates of Ag were low that will possibly result in long-established antimicrobial and antifungal properties. The present research offers a potential for its further use as a new type of modified NF membrane mitigating biofouling.

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Acad Sci Uzbek, Inst Nucl Phys, 1 Xuroson, Tashkent 100214, Uzbekistan.
JSS Acad Higher Educ & Res, Dept Pharmacol, JSS Coll Pharm, Ooty 643001, Tamil Nadu, India.
Siberian Fed Univ, 79 Svobodny Ave, Krasnoyarsk 660041, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Akademgorodok 50-38, Krasnoyarsk 5038, Russia.
Fed Res Ctr KSC SB RAS, Sukachev Inst Forest, Akademgorodok 50-28, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Khaydarov, R.; Gapurova, O.; Abdukhakimov, M.; Sadikov, I.; Garipov, I.; Krishnamurthy, P. T.; Zharkov, S. M.; Жарков, Сергей Михайлович; Zeer, G. M.; Зеер, Галина М.; Abolentseva, P. A.; Prudnikova, S. V.; Evgrafova, S. Y.; SFU Joint Scientific Center; Ministry of Science and Higher Education of the Russian Federation [FSRZ-2020-0011]
}
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