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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bikbaev R. G., Vetrov S. Ya., Timofeev I. V.
Заглавие : Transparent conductive oxides for the epsilon-near-zero Tamm plasmon polaritons
Место публикации : J. Opt. Soc. Am. B. - 2019. - Vol. 36, Is. 10. - P.2817-2823. - ISSN 07403224 (ISSN), DOI 10.1364/JOSAB.36.002817
Примечания : Cited References: 44. - The reported study was funded by RFBR according to the research project No 18-32-00053 and financial support RFBR and MOST according to the research project No 19-52-52006.
Аннотация: We demonstrate the possibility of using transparent conducting oxides [aluminum-doped zinc oxide (AZO), gallium-doped zinc oxide (GZO), indium tin oxide (ITO)] to form Tamm plasmon polaritons in the near-infrared spectral range where the permittivity of oxides is near zero. The spectral properties of the structures are investigated in the framework of the temporal coupled-mode theory and confirmed by the transfer matrix method. It is found that in the critical coupling conditions, the maximal Q-factor of a Tamm plasmon polariton is achieved when a photonic crystal is conjugated with the AZO film, while at the conjugation with the ITO films, the broadest spectral line is obtained. The sensitivity of the wavelength and spectral width of the Tamm plasmon polariton to changes in the oxide film thickness, bulk concentration of a dopant, and angle of incidence is demonstrated.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Baker, Syed, Prudnikova, Svetlana V., Shumilova, Anna A., Perianova, Olga V., Zharkov S. M., Kuzmin A.
Заглавие : Bio-functionalization of phytogenic Ag and ZnO nanobactericides onto cellulose films for bactericidal activity against multiple drug resistant pathogens
Место публикации : J. Microbiol. Methods. - 2019. - Vol. 159. - P.42-50. - ISSN 0167-7012, DOI 10.1016/j.mimet.2019.02.009. - ISSN 1872-8359(eISSN)
Примечания : Cited References: 59
Предметные рубрики: SILVER NANOPARTICLES
ANTIMICROBIAL ACTIVITY
SIZE
COMPOSITES
MEMBRANE
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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Babkina I. V., Volochaev M. N., Zhilova O. V., Kalinin Y. E., Kashirin M. A., Sitnikov A. V., Chehonadskih M. V., Yanchenko L. I.
Заглавие : Effect of Heat Treatment on the Stability of Nanosized (Co40Fe40B20)34(SiO2)66/ZnO/In2O3 Multilayers
Место публикации : Bull. Russ. Acad. Sci. Phys. - 2020. - Vol. 84, Is. 9. - P.1100-1103. - ISSN 10628738 (ISSN), DOI 10.3103/S1062873820090051
Примечания : Cited References: 11. - This work was supported by the RF Ministry of Science and Higher Education as part of State Task no. FZGM-2020-0007
Аннотация: An investigation is performed of the thermal stability and phase transformations of thin-film heterogeneous [(Co40Fe40B20)34(SiO2)66/ZnO/In2O3]85 multilayers obtained via ion beam sputtering. The system contains 85 layers, each consisting of a (Co40Fe40B20)34(SiO2)66 composite layer and ZnO and In2O3 semiconductor spacers. The sample structure in the initial state and after heat treatment is studied by means of X-ray diffraction. It is shown that the samples are stable at temperatures of up to 500°С. Zn2SiO4, InBO3, CoFe, and In2O3 phases form during annealing.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrova I. P., Bartolome J., Falvello L. R., Torres J. M., Sukhovskii A. A.
Заглавие : Effect of impurities on the successive phase transitions in (Cs1-xRbx)(2)ZnI4 compounds
Разночтения заглавия :авие SCOPUS: Effect of impurities on the successive phase transitions in (Cs1-xRbx)2ZnI4 compounds
Место публикации : J. Phys.: Condens. Matter: IOP PUBLISHING LTD, 2002. - Vol. 14, Is. 49. - P.13623-13634. - ISSN 0953-8984, DOI 10.1088/0953-8984/14/49/316
Примечания : Cited References: 27
Предметные рубрики: X-RAY
CS2ZNI4
SYSTEM
HEAT
Ключевые слова (''Своб.индексиров.''): phase transitions--point defects--specific heat--temperature--x ray diffraction analysis--zinc compounds--lock-in transition--nuclear quadrupole resonance--single crystals
Аннотация: The heat capacity, nuclear quadrupole resonance (NQR) and x-ray diffraction of (Cs1-xRbx)(2)ZnI4 single crystals have been measured, for x = 0, 0.001, 0.005, 0.01, 0.025 and 0.05. The normal to incommensurate (N-Inc) phase transition at T-I, the incommensurate to commensurate (Inc-C) lock-in transition at T-L and the structural commensurate monoclinic to triclinic transition at T-LT, observed in the parent compound (x = 0), takes place for x = 0, 0.001, 0.005 and 0.01. For x = 0.025 only T-I and T-L are detected, while for x = 0.05 no transitions were observable. The values of T-I and T-L increase with x while T-LT decreases and disappears at the concentration x = 0.025. The effect of defects, besides modifying the transition temperatures, is that of broadening and lowering the heat capacity anomaly at the lock-in transition until its total quenching for x = 0.05. No observable hysteresis is detected in this transition. NQR and x-ray diffraction data show the Inc-C transition up to the highest concentration. We conclude that this phenomenology is caused by weak interaction of the incommensurate modulation with point defects even in the region close to the Inc-C transition.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Fedorov A. S., Kuzubov A. A., Kholtobina A. S.
Заглавие : Quantum-chemical study of modified zinc oxide nanostructures
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016): abstracts/ ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk: KIP RAS SB, 2016. - Ст.O1.7. - P.44-45. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : References: 4
Ключевые слова (''Своб.индексиров.''): surface--magnetization--zinc oxide
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zeer G. M., Zelenkova E. G., Nikolaeva N. S., Zharkov S. M., Pochekutov S. I., Ledyaeva O. N., Sartpaeva A. B., Mikheev A. A.
Заглавие : Formation of phases and microstructure of ZnO and TiO2 based ceramic
Коллективы : Russian Foundation for Fundamental Research [13-08-01003-a]; Ministry of Education of the Russian Federation
Место публикации : Glass Ceram.: Springer, 2015. - Vol. 72, Is. 7-8. - P.242-245. - ISSN 0361-7610, DOI 10.1007/s10717-015-9765-8. - ISSN 1573-8515(eISSN)
Примечания : Cited References:15. - This work was supported in part by the Russian Foundation for Fundamental Research (Grant No. 13-08-01003-a) and the Ministry of Education of the Russian Federation (as part of scientific research tasked by the state to the Siberian Federal University for 2014).
Предметные рубрики: GLASS ENAMEL COATINGS
NANOWIRES
Ключевые слова (''Своб.индексиров.''): electrocontact materials--metal oxides--zinc titanate--nanopowders--ceramic--microstructure--phase formation
Аннотация: Nanopowders of zinc and titanium oxides were used to obtain samples of Zn2TiO4-ZnO ceramic. Phase formation as well as the microstructure and elemental composition of the phases formed were studied by means of electron microscopy. The density and porosity were calculated, and the sizes of grains and pores in the ceramic were determined. The temperature at the zinc titanate forms was determined. It was shown that it corresponds to the sintering temperature of electrocontact materials with this composition. It is proposed that zinc titanate and oxide be used as arc-suppressing and dispersion-hardening additional additives in copper-based electrocontact materials.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yang Y., Jiang X., Gong P., Molokeev M. S., Li X., Li Y., Wu X., Wu Y., Lin Z.
Заглавие : High mechanical strength in Zn4B6O13 with an unique sodalite-cage structure
Место публикации : RSC Adv.: Royal Society of Chemistry, 2017. - Vol. 7, Is. 4. - P.2038-2043. - ISSN 20462069 (ISSN), DOI 10.1039/c6ra25752f
Примечания : Cited References: 44. - The authors acknowledge Dr Siyang Luo for useful discussion. This work is supported by the National Scientific Foundations of China (Grant 11474292), the Special Foundation of the Director of Technical Institute of Physics and Chemistry (TIPC), and China “863” project (No. 2015AA034203).
Ключевые слова (''Своб.индексиров.''): calculations--mechanical properties--shear stress--thermal expansion--ultraviolet spectroscopy--x ray diffraction--complex environments--first-principles calculation--high mechanical strength--high-pressure x-ray diffractions--mechanical resistance--ultraviolet spectral regions--wide temperature ranges--zero thermal expansion--zinc
Аннотация: Recently, a borate crystal Zn4B6O13 (ZBO) has been focused on since it exhibits novel isotropic near-zero thermal expansion behavior in a wide temperature range. In this work, the mechanical properties in ZBO are studied by high-pressure X-ray diffraction and first-principles calculations. It is found that ZBO possesses the highest mechanical hardness in all known borates whose mechanical properties have been measured. The very high mechanical strength in ZBO mainly originates from the resistance of strong Zn-O bonds to the rotation among BO4 tetrahedra in the unique sodalite-cage structure. Moreover, ZBO shows relatively high mechanical resistance to the axial and shear stress and exhibits high optical transparence in the ultraviolet spectral region under high pressure. Benefitting from these good properties, ZBO may find potential applications in high-precision optical facilities used at extreme conditions under complex environments. © The Royal Society of Chemistry.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bykova L. E., Myagkov V. G., Tambasov I. A., Bayukov O. A., Zhigalov V. S., Mikhlin Y. L., Nemtsev I. V., Bondarenko G. N.
Заглавие : Magnetic and structural properties of nanocomposite ZnO-Fe3O4 films prepared by solid-state synthesis
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : Solid State Phenom.: Selected, peer reviewed papers/ ed.: S. G. Ovchinnikov, A. Samardak: Trans Tech Publications, 2014. - Vol. 215: Trends in Magnetism: Nanomagnetism (EASTMAG-2013). - P.158-162. - ISSN 978-303835054-5, DOI 10.4028/www.scientific.net/SSP.215.158. - ISSN 1662-9779
Примечания : Cited References: 18
Ключевые слова (''Своб.индексиров.''): ferromagnetic nanocomposite films--magnetite--solid-state synthesis--zinc oxide
Аннотация: A simple method for obtaining ZnO-FeO3O4 nanocomposites using solid-state reaction Zn + 3Fe2O3 ZnO + 2FeO3O4 is suggested. An analysis of the characteristics and properties of ZnOFeO3O4 nanocomposites was carried out by a combination of structural and physical methods (X-ray diffraction, scanning electron microscopy, photoelectron spectroscopy, Mossbauer measurements, X-ray fluorescent analysis, and magnetic measurements). The magnetization of the hybrid ZnOFeO3O4 films is equal to 440 emu/cm3. The resulting FeO3O4 nanoparticles are surrounded by a ZnO shell and have sizes ranging between 20 and 40 nm. © (2014) Trans Tech Publications, Switzerland.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Maksimov E. G., Zinenko V. I., Zamkova N. G.
Заглавие : Ab initio calculations of the physical properties of ionic crystals
Место публикации : Phys. Usp.: TURPION LTD, 2004. - Vol. 47, Is. 11. - P1075-1099. - ISSN 1063-7869, DOI 10.1070/PU2004v047n11ABEH001796
Примечания : Cited References: 90
Предметные рубрики: STRUCTURAL PHASE-TRANSITION
LOCAL-FIELD CORRECTIONS
INDUCED BREATHING MODEL
ZINC-BLENDE STRUCTURE
ELECTRON-GAS THEORY
LATTICE-DYNAMICS
MICROSCOPIC CALCULATIONS
MACROSCOPIC POLARIZATION
STATISTICAL-MECHANICS
1ST-PRINCIPLES THEORY
Аннотация: First-principles calculations of the physical properties of ionic crystals are reviewed. Two markedly different approaches within the framework of the density functional theory are described. In one of them, the electron spectrum and wave functions are treated within the standard band picture based on the solution of Kohn-Sham equations. In the second approach, the total electron density of a crystal is represented as a super-position of the densities of individual ions. The problem of determining the electric polarization of a crystal is discussed for each approach. It is shown that it is the use of Bloch functions rather than the physics of the phenomenon that complicates the solution of this problem within the Kohn-Sham framework. The deformable and polarizable ion model is described in detail, and its application to calculating many properties of ionic crystals, including the lattice dynamics and structural stability of crystal phases, is discussed.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zeer G. M., Zelenkova E. G., Nikolaeva N. S., Zharkov S. M., Abkaryan A. K., Mikheev A. A.
Заглавие : Microstructure and phase composition of the two-phase ceramic synthesized from titanium oxide and zinc oxide
Место публикации : Sci. Sinter. - 2018. - Vol. 50, Is. 2. - P.173-181. - ISSN 0350820X (ISSN), DOI 10.2298/SOS1802173Z
Примечания : Cited References: 22
Ключевые слова (''Своб.индексиров.''): nanopowders--titanium oxide--zinc oxide--solid phase reaction--ceramic
Аннотация: We have made investigations of the phase formation and microstructure on the ceramics obtained from a starting nanopowder mixture with the weight ratio ZnO : TiO2 = 4 : 1. Ceramic is obtained at different sintering temperatures, namely, 948, 1223 and 1473 К. Using the characterization methods of electron microscopy, energy dispersive microanalysis and X-ray diffraction phase analysis it has been shown that the ceramics structure is consisted of two dispersed phases of Zn2TiO4 and ZnO with the grain sizes being in range 0,5-1 μm. It has been found also that, at ceramic`s sintering temperature of 1223 К, the solid phase interactions are completed with the structure ZnO : Zn2TiO4 ≈ 1 : 1,5 phase ratio.
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