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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belousov O. V., Borisov R. V., Zharkov S. M., Parfenov V. A., Dorokhova L. I.
Заглавие : Redox potentials of gold-palladium powders in aqueous solutions of H2PdCl4
Место публикации : Russ. J. Phys. Chem. A: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 86, Is. 3. - P.484-488. - ISSN 0036-0244, DOI 10.1134/S0036024412020070
Примечания : Cited References: 26
Предметные рубрики: BIMETALLIC NANOPARTICLES
METALLIC PALLADIUM
COPPER
ELECTRODE
BLACK
Bimetallic particles
Bimetallic powders
Gold-palladium
Hydrochloric acid solution
Nernst equation
Redox potentials
Gold
Hydrochloric acid
Redox reactions
Secondary batteries
Transmission electron microscopy
X ray diffraction analysis
Ключевые слова (''Своб.индексиров.''): bimetallic powders--gold-palladium--redox potential
Аннотация: The redox potential of fine-dispersed and compact bimetallic powders of the palladium-gold system in hydrochloric acid solutions of H2PdCl4 at a temperature of 60A degrees C was studied. It was found that the redox potential increases with gold enrichment of the solid solution in accordance with the Nernst equation. The effect of gold-palladium particle size on this redox potential is shown. The morphology, sizes, and composition of bimetallic particles are determined via transmission electron microscopy and X-ray diffraction analysis.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Zabluda V. N., Sokolov A. E., Ovchinnikov S. G., Knyazev B. A., Michlin J. L., Veshnyakova E.A., Zubavichus Y. V., Kalsin A. M., Gerasimov V. V.
Заглавие : Vizible and terahertz magnetooptics in gold and silver low-dimensional objects : Abstract
Коллективы : "Functional Materials", International Conference , Taurida National V. I. Vernadsky University
Место публикации : Functional materials: Abstracts/ ed. V. N. Berzhansky. - Simferopol, 2013. - P.223. - ISBN 978-966-491-465-6
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Sokolov A. E., Zabluda V. N., Ovchinnikov S. G., Knyazev B. A., Gerasimov V. V., Michlin J. L., Veshnyakova E.A., Zubavichus Y. V., Kalsin A. M.
Заглавие : Magnetooptics in gold and silver nanosizes low-dimensional objects
Коллективы : "Nanomaterials: Application and Properties", International Conference (3; 16–21 Sept., 2013; Alushta, Ukraine)
Место публикации : Proc. Int. Conf. Nanomaterials: Application and Properties. - 2013. - Vol. 2, № 1. - Ст.01NFPMM06
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Moiseenko E. T., Altunin R. R., Zharkov S. M.
Заглавие : Solid-state synthesis and atomic ordering in thin Cu/Au films (Atomic Ratio, Cu : Au = 3 : 1)
Место публикации : Bull. Russ. Acad. Sci.: Phys.: Allerton Press, 2012. - Vol. 76, Is. 10. - P.1149-1151. - ISSN 1062-8738, DOI 10.3103/S1062873812100073
Ключевые слова (''Своб.индексиров.''): atomic ordering--atomic ratio--bi-layer--in-situ transmission--nano films--solid-state synthesis--space groups--atoms--gold--in situ processing--transmission electron microscopy--copper
Аннотация: In situ transmission electron microscopy investigations of the processes of solid-state synthesis and atomic ordering in bilayer Cu/Au nanofilms (atomic ratio, Cu : Au = 3 : 1) are conducted. It is found that solid-state synthesis starts at 170В°C. A Cu 3Au atomic-disordered structure (Fm3m space group; lattice con- stant, a = 3.76 В± 0.01 A) forms at 280В°C. Annealing the film for 1 hour at 380В°C produced a Cu 3AuI (L1 2 type) atomic-ordered superstructure, a Pm-3m space group, and lattice constant, a = 3.76 В± 0.01 a in the bulk of the film.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ershov A. E., Gavrilyuk A. P., Karpov S. V., Semina P. N.
Заглавие : Optodynamic phenomena in aggregates of polydisperse plasmonic nanoparticles
Коллективы : Russian Academy of Sciences [24.29, 24.31, III.9.5, 43, SB RAS-SFU (101)]; Ministry of Education and Science of Russian Federation [14.B37.21.0457]
Место публикации : Appl. Phys. B: Springer, 2014. - Vol. 115, Is. 4. - P.547-560. - ISSN 0946-2171, DOI 10.1007/s00340-013-5636-6. - ISSN 1432-0649
Примечания : Cited References: 48. - Authors are thankful to Prof. V. A. Markel (University of Pennsylvania) for supplying program codes for realization of the coupled dipole method for polydisperse metal nanoparticle aggregates. This research was supported by the Russian Academy of Sciences under the Grants 24.29, 24.31, III.9.5, 43, SB RAS-SFU (101); Ministry of Education and Science of Russian Federation under Contract 14.B37.21.0457.
Предметные рубрики: SMALL-PARTICLE COMPOSITES
OPTICAL-PROPERTIES
NOBLE-METALS
SILVER
ELECTRON
LIQUID
GENERATION
DYNAMICS
FORCES
GOLD
Аннотация: We propose an optodynamical model of interaction of pulsed laser radiation with aggregates of spherical metallic nanoparticles embedded into host media. The model takes into account polydispersity of particles, pair interactions between the particles, dissipation of absorbed energy, heating and melting of the metallic core of particles and of their polymer adsorption layers, and heat exchange between electron and ion components of the particle material as well as heat exchange with the interparticle medium. Temperature dependence of the electron relaxation constant of the particle material and the effect of this dependence on interaction of nanoparticles with laser radiation are first taken into consideration. We study in detail light-induced processes in the simplest resonant domains of multiparticle aggregates consisting of two particles of an arbitrary size in aqueous medium. Optical interparticle forces are realized due to the light-induced dipole interaction. The dipole moment of each particle is calculated by the coupled dipole method (with correction for the effect of higher multipoles). We determined the role of various interrelated factors leading to photomodification of resonant domains and found an essential difference in the photomodification mechanisms between polydisperse and monodisperse nanostructures.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Myagkov V. G., Bayukov O. A., Mikhlin Y. L., Zhigalov V. S., Bykova L. E., Bondarenko G. N.
Заглавие : Long-range chemical interactions in solid-state reactions: effect of an inert Ag interlayer on the formation of L10-FePd in epitaxial Pd(0 0 1)/Ag(0 0 1)/Fe(0 0 1) and Fe(0 0 1)/Ag(0 0 1)/Pd(0 0 1) trilayers
Место публикации : Philos. Mag.: Taylor & Francis, 2014. - Vol. 94, Is. 23. - P.2595-2622. - ISSN 1478-6435, DOI 10.1080/14786435.2014.926037. - ISSN 1478-6443
Примечания : Cited References: 117
Предметные рубрики: HIGH-TEMPERATURE SYNTHESIS
THIN-FILMS
PHASE-FORMATION
MAGNETIC-PROPERTIES
X-RAY
MARTENSITIC TRANSFORMATIONS
PHOTOELECTRON-SPECTROSCOPY
STRUCTURAL CHARACTERISTICS
CASIMIR FORCE
GOLD-FILMS
Ключевые слова (''Своб.индексиров.''): fe-pd system--epitaxial thin film--inert ag buffer layer--diffusion--solid-state reactions--l1(0)--long-range chemical interactions
Аннотация: The effect of 0, 0.5, and 1 μm-thick Ag interlayers on the chemical interaction between Pd and Fe in epitaxial Pd(0 0 1)/Ag(0 0 1)/Fe(0 0 1)/MgO(0 0 1) and Fe(0 0 1)/Ag(0 0 1)/Pd(0 0 1)/MgO(0 0 1) trilayers has been studied using X-ray diffraction, 57Fe Mössbauer spectroscopy, X-ray photoelectron spectroscopy, and magnetic structural measurements. No mixing of Pd and Fe occurs via the chemically inert Ag layer at annealing temperatures up to 400 °C. As the annealing temperature is increased above 400 °C, a solid-state synthesis of an ordered L10-FePd phase begins in the Pd(0 0 1)/Ag(0 0 1)/Fe(0 0 1) and Fe(0 0 1)/Ag(0 0 1)/Pd(0 0 1) film trilayers regardless of the thickness of the buffer Ag layer. In all samples, annealing above 500 °C leads to the formation of a disordered FexPd1−x(0 0 1) phase; however, in samples lacking the Ag layer, the synthesis of FexPd1−x is preceded by the formation of an ordered L12-FePd3 phase. An analysis of the X-ray photoelectron spectroscopy results shows that Pd is the dominant moving species in the reaction between Pd and Fe. According to the preliminary results, the 2.2 μm-thick Ag film does not prevent the synthesis of the L10-FePd phase and only slightly increases the phase’s initiation temperature. Data showing the ultra-fast transport of Pd atoms via thick inert Ag layers are interpreted as direct evidence of the long-range character of the chemical interaction between Pd and Fe. Thus, in the reaction state, Pd and Fe interact chemically even though the distance between them is about 104 times greater than an ordinary chemical bond length.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ershov A. E., Gavrilyuk A. P., Karpov S. V., Semina P. N.
Заглавие : Effect of local environment in resonant domains of polydisperse plasmonic nanoparticle aggregates on optodynamic processes in pulsed laser fields
Коллективы : Russian Academy of Sciences [24.29, 24.31, III.9.5, 43, SB RAS-SFU (101), 3-9-5]
Место публикации : Chin. Phys. B: IOP Publishing, 2015. - Vol. 24, Is. 4. - Ст.047804. - ISSN 1674, DOI 10.1088/1674-1056/24/4/047804. - ISSN 17414199(eISSN)
Примечания : Cited References:25. - Project supported by the Russian Academy of Sciences (Grant Nos. 24.29, 24.31, III.9.5, 43, SB RAS-SFU (101), and 3-9-5).
Предметные рубрики: METAL NANOPARTICLES
GOLD NANOPARTICLES
OPTICAL-PROPERTIES
Ключевые слова (''Своб.индексиров.''): nanoparticle--surface plasmon--colloid aggregate--optodynamics
Аннотация: Interactions of pulsed laser radiation with resonance domains of multiparticle colloidal aggregates having an increasingly complex local environment are studied via an optodynamic model. The model is applied to the simplest configurations, such as single particles, dimers, and trimers consisting of mono- and polydisperse Ag nanoparticles. We analyze how the local environment and the associated local field enhancement by surrounding particles affect the optodynamic processes in domains, including their photomodification and optical properties.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Dubynina A. V., Semina P. N., Sokolov A. E., Zabluda V. N., Aleksandrovskii A. S., Karacharov A., Zamay G. S., Kolovskaya O. S., Ivanchenko T., Govorina Y., Zamay A. S., Zamay T. S.
Заглавие : Aptamer-mediated targeted hyperthermia caused by gold nanoparticles
Коллективы : Annual Meeting of the Oligonucleotide Therapeutics Society
Место публикации : 11th Annual Meet. of the Oligonucleotide Therapeutics Soc. (OTS). - 2015. - P.127
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sadreev A. F., Sukhunin Y. V., Petoral R. M., Uvdal K.
Заглавие : Ground state and phase transitions in a system of arg-cysteamines self-assembled on a Au(111) crystal surface
Место публикации : J. Chem. Phys.: AMER INST PHYSICS, 2004. - Vol. 120, Is. 2. - P954-960. - ISSN 0021-9606, DOI 10.1063/1.1631920
Примечания : Cited References: 38
Предметные рубрики: MOLECULAR-DYNAMICS SIMULATION
HYDROGEN-BOND
MONOLAYERS
MODEL
GOLD
PEPTIDES
ALKANETHIOLS
ACTIVATION
FILMS
CYS
Ключевые слова (''Своб.индексиров.''): gold--ground state--hydrogen bonds--molecules--phase transitions--self assembly--surfaces--temperature--arg-cysteamines--crystal surface--dipole moments--dipole-dipole interactions--molecular dynamics
Аннотация: The translational and orientation order of arg-cysteamine molecules chemiabsorbed on the Au(111) crystal surface is considered. Couplings between carbon, nitrogen, and hydrogen atoms of the n-alkanethiols are approximated by the Lennard-Jones potential. Moreover, hydrogen bonds between oxygen and nitrogen and dipole-dipole interactions of the dipole moments of different atomic groups are taken into account. It is found that molecules are arranged in a 2x2 lattice and have the total symmetry C(6)xZ(2). The critical temperature of the phase transition to the tilted state T-c1, which breaks the symmetry C-6, is estimated to be extremely high. The spontaneous breakdown of the remaining symmetry Z(2) leads to the twisted state of the molecules and has the critical temperature T-c2=340 K. (C) 2004 American Institute of Physics.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sukhinin Y. V.
Заглавие : Phase transitions in self-assembled monolayers of alkanethiols containing the polar group
Место публикации : J. Exp. Theor. Phys.: AMER INST PHYSICS, 1998. - Vol. 87, Is. 1. - P115-122. - ISSN 1063-7761, DOI 10.1134/1.558645
Примечания : Cited References: 38
Предметные рубрики: ORGANIZED MOLECULAR ASSEMBLIES
ALKYL THIOL MONOLAYERS
STRUCTURAL CHARACTERIZATION
DYNAMICS SIMULATION
LANGMUIR MONOLAYER
SURFACES
GOLD
FILMS
AU(111)
MODEL
Аннотация: Equilibrium states of the system of self-assembled monolayers (SAMs) of n-alkanethiol molecules HS(CH2)(n-1)(X) with polar group X chemiabsorbed on the Au(111) crystal surface are considered. The couplings between the atoms (C, H) of the n-alkanethiols are approximated by the Lennard-Jones potential. The couplings between the n-alkanethiols and the crystal surface are approximated by the 12-3 potential. The interactions of polar groups and the self-images with the metal substrate are taken into consideration. The phase-transition temperatures, the structural order and equilibrium tilt, and the twist and azimuthal angles of the macromolecules, which depend on the dipole moments, are found. (C) 1998 American Institute of Physics.
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