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Труды сотрудников ИФ СО РАН

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Redox potentials of gold-palladium powders in aqueous solutions of H2PdCl4 / O. V. Belousov [et al.] // Russ. J. Phys. Chem. A. - 2012. - Vol. 86, Is. 3. - P. 484-488, DOI 10.1134/S0036024412020070. - Cited References: 26 . - ISSN 0036-0244

РУБ Chemistry, Physical + Powders
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
Кл.слова (ненормированные):
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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Публикация на русском языке Окислительно-востановительные потенциалы золото-палладиевых порошков в водных растворах H2PdCl4 [Текст] / О. В. Белоусов [и др.] // Журн. физ. химии : Наука, 2012. - Т. 86 № 3. - С. 557-562

Держатели документа:
[Belousov, O. V.
Borisov, R. V.
Parfenov, V. A.
Dorokhova, L. I.] Russian Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Krasnoyarsk 660041, Russia
[Zharkov, S. M.] Russian Acad Sci, Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
[Zharkov, S. M.] Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Belousov, O. V.; Borisov, R. V.; Zharkov, S. M.; Жарков, Сергей Михайлович; Parfenov, V. A.; Dorokhova, L. I.
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Optodynamic phenomena in aggregates of polydisperse plasmonic nanoparticles / A. E. Ershov [et al.] // Appl. Phys. B. - 2014. - Vol. 115, Is. 4. - P. 547-560, DOI 10.1007/s00340-013-5636-6. - 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. . - ISSN 0946-2171. - ISSN 1432-0649

РУБ Optics + Physics, Applied
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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Держатели документа:
Russian Acad Sci, LV Kirenski Inst Phys, Krasnoyarsk 660036, Russia
Russian Acad Sci, Inst Computat Modeling, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660028, Russia

Доп.точки доступа:
Ershov, A. E.; Ершов, Александр Евгеньевич; Gavrilyuk, A. P.; Karpov, S. V.; Карпов, Сергей Васильевич; Semina, P. N.; Семина, Полина Николаевна; 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]
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Ground state and phase transitions in a system of arg-cysteamines self-assembled on a Au(111) crystal surface / A. F. Sadreev [et al.] // J. Chem. Phys. - 2004. - Vol. 120, Is. 2. - P. 954-960, DOI 10.1063/1.1631920. - Cited References: 38 . - ISSN 0021-9606

РУБ Physics, Atomic, Molecular & Chemical
Рубрики:
MOLECULAR-DYNAMICS SIMULATION
   HYDROGEN-BOND
   MONOLAYERS
   MODEL
   GOLD
   PEPTIDES
   ALKANETHIOLS
   ACTIVATION
   FILMS
   CYS
Кл.слова (ненормированные):
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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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden
ИФ СО РАН
Kirensky Institute of Physics, 660036, Krasnoyarsk, Russian Federation
Dept. of Phys. and Msrmt. Technology, Linkoping University, S-581 83 Linkoping, Sweden

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Sukhunin, Y. V.; Petoral, R. M.; Uvdal, K.
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Sukhinin, Y. V.
Phase transitions in self-assembled monolayers of alkanethiols containing the polar group / Y. V. Sukhinin // J. Exp. Theor. Phys. - 1998. - Vol. 87, Is. 1. - P. 115-122, DOI 10.1134/1.558645. - Cited References: 38 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
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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Держатели документа:
LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
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Collective lattice resonances in disordered and quasi-random all-dielectric metasurfaces / V. I. Zakomirnyi [et al.] // J. Opt. Soc. Am. B. - 2019. - Vol. 36, Is. 7. - P. E21-E29, DOI 10.1364/JOSAB.36.000E21. - Cited References: 91. - Russian Foundation for Basic Research (RFBR) (18-42-240013); Russian Science Foundation (RSF) (18-13-00363); Siberian Federal University (SibFU) (3.8896.2017). . - ISSN 0740-3224. - ISSN 1520-8540

РУБ Optics
Рубрики:
PLASMON RESONANCES
   NANOPARTICLE ARRAY
   MODES
   GOLD
   NANOPHOTONICS
Аннотация: Collective lattice resonances in disordered 2D arrays of spherical Si nanoparticles (NPs) have been thoroughly studied within the framework of the coupled dipole approximation. Three types of defects have been analyzed: positional disorder, size disorder, and quasi-random disorder. We show that the positional disorder strongly suppresses either the electric dipole (ED) or the magnetic dipole (MD) coupling, depending on the axis along which the NPs are shifted. Contrarily, size disorder strongly affects only the MD response, while the ED resonance can be almost intact, depending on the lattice configuration. Finally, random removing of NPs from an ordered 2D lattice reveals a quite surprising result: hybridization of the ED and MD resonances with lattice modes remains observable even in the case of random removing of up to 84% of the NPs from the ordered array. The reported results could be important for rational design and utilization of metasurfaces, solar cells, and other alldielectric photonic devices. (C) 2019 Optical Society of America

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Держатели документа:
Royal Inst Technol, Sch Engn Sci Chem Biotechnol & Hlth, Dept Theoret Chem & Biol, SE-10691 Stockholm, Sweden.
FMBA Russia, Fed Siberian Res Clin Ctr, Krasnoyarsk 660037, Russia.
Siberian Fed Univ, Inst Nanotechnol Spect & Quantum Chem, Krasnoyarsk 660041, Russia.
Siberian State Univ Sci & Technol, Krasnoyarsk 660014, Russia.
RAS, KSC SB, Fed Res Ctr, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Univ Rochester, Inst Opt, 601 Elmwood Ave, Rochester, NY 14627 USA.

Доп.точки доступа:
Zakomirnyi, Vadim, I; Karpov, S. V.; Карпов, Сергей Васильевич; Agren, Hans; Rasskazov, Ilia L.; Russian Foundation for Basic Research (RFBR) [18-42-240013]; Russian Science Foundation (RSF) [18-13-00363]; Siberian Federal University (SibFU) [3.8896.2017]
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    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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