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PHYSICS (576 journals)                  1 2 3 | Last

Showing 1 - 200 of 741 Journals sorted alphabetically
Acta Acustica united with Acustica     Full-text available via subscription   (Followers: 7)
Acta Mechanica     Hybrid Journal   (Followers: 20)
Acta Scientifica Naturalis     Open Access   (Followers: 2)
Advanced Composite Materials     Hybrid Journal   (Followers: 66)
Advanced Functional Materials     Hybrid Journal   (Followers: 50)
Advanced Materials     Hybrid Journal   (Followers: 258)
Advanced Science Focus     Free   (Followers: 3)
Advanced Structural and Chemical Imaging     Open Access   (Followers: 2)
Advanced Studies in Theoretical Physics     Open Access  
Advances in Condensed Matter Physics     Open Access   (Followers: 8)
Advances in Exploration Geophysics     Full-text available via subscription   (Followers: 3)
Advances in Geophysics     Full-text available via subscription   (Followers: 6)
Advances in High Energy Physics     Open Access   (Followers: 19)
Advances in Imaging and Electron Physics     Full-text available via subscription   (Followers: 2)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 20)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 29)
Advances in OptoElectronics     Open Access   (Followers: 5)
Advances In Physics     Hybrid Journal   (Followers: 19)
Advances in Physics : X     Open Access  
Advances in Physics Theories and Applications     Open Access   (Followers: 12)
Advances in Remote Sensing     Open Access   (Followers: 37)
AIP Advances     Open Access   (Followers: 8)
AIP Conference Proceedings     Full-text available via subscription   (Followers: 3)
American Journal of Condensed Matter Physics     Open Access   (Followers: 4)
American Journal of Signal Processing     Open Access   (Followers: 11)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 3)
Annalen der Physik     Hybrid Journal   (Followers: 5)
Annales Geophysicae (ANGEO)     Open Access   (Followers: 15)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3)
Annales UMCS, Physica     Open Access  
Annals of Nuclear Medicine     Hybrid Journal   (Followers: 5)
Annals of Physics     Hybrid Journal   (Followers: 4)
Annals of West University of Timisoara - Physics     Open Access   (Followers: 1)
Annual Reports on NMR Spectroscopy     Full-text available via subscription   (Followers: 4)
Annual Review of Analytical Chemistry     Full-text available via subscription   (Followers: 11)
Annual Review of Condensed Matter Physics     Full-text available via subscription  
Annual Review of Materials Research     Full-text available via subscription   (Followers: 5)
APL Materials     Open Access   (Followers: 12)
Applied Composite Materials     Hybrid Journal   (Followers: 48)
Applied Physics A     Hybrid Journal   (Followers: 7)
Applied Physics Frontier     Open Access   (Followers: 1)
Applied Physics Letters     Hybrid Journal   (Followers: 32)
Applied Physics Research     Open Access   (Followers: 3)
Applied Physics Reviews     Hybrid Journal   (Followers: 8)
Applied Radiation and Isotopes     Hybrid Journal   (Followers: 7)
Applied Spectroscopy     Full-text available via subscription   (Followers: 23)
Applied Spectroscopy Reviews     Hybrid Journal   (Followers: 5)
Archive for Rational Mechanics and Analysis     Hybrid Journal  
Asia Pacific Physics Newsletter     Hybrid Journal  
ASTRA Proceedings     Open Access   (Followers: 1)
Astronomy & Geophysics     Hybrid Journal   (Followers: 47)
Astronomy and Astrophysics Review     Hybrid Journal   (Followers: 21)
Astrophysical Journal Supplement Series     Full-text available via subscription   (Followers: 8)
Atoms     Open Access   (Followers: 1)
Attention, Perception & Psychophysics     Full-text available via subscription   (Followers: 10)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 8)
Axioms     Open Access  
Bangladesh Journal of Medical Physics     Open Access  
Bauphysik     Hybrid Journal   (Followers: 2)
Berkala Fisika Indonesia     Open Access  
Biomaterials     Hybrid Journal   (Followers: 44)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 17)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 32)
Biophysical Reviews     Hybrid Journal   (Followers: 1)
Biophysical Reviews and Letters     Hybrid Journal   (Followers: 3)
BMC Biophysics     Open Access   (Followers: 5)
Boson Journal of Modern Physics     Open Access   (Followers: 11)
Brazilian Journal of Physics     Hybrid Journal  
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 10)
Bulletin of Materials Science     Open Access   (Followers: 43)
Bulletin of the Atomic Scientists     Hybrid Journal   (Followers: 3)
Bulletin of the Lebedev Physics Institute     Hybrid Journal   (Followers: 1)
Bulletin of the Russian Academy of Sciences: Physics     Hybrid Journal   (Followers: 1)
Caderno Brasileiro de Ensino de Física     Open Access  
Canadian Journal of Physics     Hybrid Journal   (Followers: 13)
Case Studies in Nondestructive Testing and Evaluation     Open Access   (Followers: 11)
Cells     Open Access   (Followers: 2)
CERN courier. International journal of high energy physics     Free   (Followers: 7)
Chemical Physics of Solid Surfaces     Full-text available via subscription  
Chinese Journal of Astronomy and Astrophysics     Full-text available via subscription   (Followers: 13)
Chinese Journal of Chemical Physics     Hybrid Journal   (Followers: 1)
Chinese Journal of Physics     Hybrid Journal  
Chinese Physics B     Full-text available via subscription  
Chinese Physics C     Full-text available via subscription  
Chinese Physics Letters     Full-text available via subscription  
Cogent Physics     Open Access   (Followers: 1)
Cohesion and Structure     Full-text available via subscription   (Followers: 2)
Colloid Journal     Hybrid Journal   (Followers: 2)
Communications in Mathematical Physics     Hybrid Journal   (Followers: 1)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Communications in Theoretical Physics     Full-text available via subscription   (Followers: 3)
Complex Analysis and its Synergies     Open Access   (Followers: 2)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 183)
Composites Part B : Engineering     Hybrid Journal   (Followers: 286)
Computational Astrophysics and Cosmology     Open Access   (Followers: 1)
Computational Condensed Matter     Open Access  
Computational Materials Science     Hybrid Journal   (Followers: 21)
Computational Mathematics and Mathematical Physics     Hybrid Journal   (Followers: 3)
Computational Particle Mechanics     Hybrid Journal   (Followers: 1)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computer Physics Communications     Hybrid Journal   (Followers: 6)
Contemporary Concepts of Condensed Matter Science     Full-text available via subscription  
Contemporary Physics     Hybrid Journal   (Followers: 26)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 7)
Contributions to Plasma Physics     Hybrid Journal   (Followers: 3)
COSPAR Colloquia Series     Full-text available via subscription   (Followers: 7)
Cryogenics     Hybrid Journal   (Followers: 51)
Current Applied Physics     Full-text available via subscription   (Followers: 4)
Current Science     Open Access   (Followers: 60)
Diagnostic and Interventional Imaging     Full-text available via subscription  
Diamond and Related Materials     Hybrid Journal   (Followers: 12)
Doklady Physics     Hybrid Journal   (Followers: 1)
Dynamical Properties of Solids     Full-text available via subscription  
ECS Journal of Solid State Science and Technology     Hybrid Journal   (Followers: 6)
Egyptian Journal of Remote Sensing and Space Science     Open Access   (Followers: 19)
EJNMMI Physics     Open Access  
Electrospinning     Open Access  
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 41)
Energy Procedia     Open Access   (Followers: 2)
Engineering Failure Analysis     Hybrid Journal   (Followers: 69)
Engineering Fracture Mechanics     Hybrid Journal   (Followers: 23)
Environmental Fluid Mechanics     Hybrid Journal   (Followers: 5)
EPJ Nonlinear Biomedical Physics     Open Access  
EPJ Quantum Technology     Open Access  
EPJ Techniques and Instrumentation     Full-text available via subscription  
EPJ Web of Conferences     Open Access  
European Journal of Physics     Full-text available via subscription   (Followers: 18)
European Physical Journal - Applied Physics     Full-text available via subscription   (Followers: 17)
European Physical Journal C     Hybrid Journal   (Followers: 1)
Europhysics News     Open Access  
Experimental Mechanics     Hybrid Journal   (Followers: 22)
Experimental Methods in the Physical Sciences     Full-text available via subscription  
Experimental Techniques     Hybrid Journal   (Followers: 56)
Exploration Geophysics     Hybrid Journal   (Followers: 4)
Few-Body Systems     Hybrid Journal  
Fire and Materials     Hybrid Journal   (Followers: 5)
Flexible Services and Manufacturing Journal     Hybrid Journal   (Followers: 1)
Fluctuation and Noise Letters     Hybrid Journal   (Followers: 1)
Fluid Dynamics     Hybrid Journal   (Followers: 14)
Fortschritte der Physik/Progress of Physics     Hybrid Journal  
Frontiers in Physics     Open Access   (Followers: 6)
Frontiers of Materials Science     Hybrid Journal   (Followers: 3)
Frontiers of Physics     Hybrid Journal   (Followers: 2)
Fusion Engineering and Design     Hybrid Journal   (Followers: 10)
Geochemistry, Geophysics, Geosystems     Full-text available via subscription   (Followers: 30)
Geografiska Annaler, Series A : Physical Geography     Hybrid Journal   (Followers: 3)
Geophysical Research Letters     Full-text available via subscription   (Followers: 130)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 156)
Glass Physics and Chemistry     Hybrid Journal   (Followers: 4)
Global Journal of Physics     Open Access   (Followers: 2)
Granular Matter     Hybrid Journal   (Followers: 1)
Graphs and Combinatorics     Hybrid Journal   (Followers: 7)
Gravitation and Cosmology     Hybrid Journal   (Followers: 3)
Handbook of Geophysical Exploration: Seismic Exploration     Full-text available via subscription  
Handbook of Metal Physics     Full-text available via subscription  
Handbook of Surface Science     Full-text available via subscription   (Followers: 3)
Handbook of Thermal Analysis and Calorimetry     Full-text available via subscription   (Followers: 1)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 3)
Heat Transfer - Asian Research     Hybrid Journal   (Followers: 12)
High Energy Density Physics     Hybrid Journal   (Followers: 2)
High Pressure Research: An International Journal     Hybrid Journal   (Followers: 3)
IEEE Journal of Quantum Electronics     Hybrid Journal   (Followers: 21)
IEEE Signal Processing Magazine     Full-text available via subscription   (Followers: 68)
IET Optoelectronics     Hybrid Journal   (Followers: 1)
Il Colle di Galileo     Open Access  
Image Analysis & Stereology     Open Access  
Imaging Science Journal     Hybrid Journal   (Followers: 2)
Indian Journal of Biochemistry and Biophysics (IJBB)     Open Access   (Followers: 3)
Indian Journal of Physics     Hybrid Journal   (Followers: 20)
Indian Journal of Pure & Applied Physics (IJPAP)     Open Access   (Followers: 38)
Indian Journal of Radio & Space Physics (IJRSP)     Open Access   (Followers: 36)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 41)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 10)
Infinite Dimensional Analysis, Quantum Probability and Related Topics     Hybrid Journal  
InfraMatics     Open Access  
Infrared Physics & Technology     Hybrid Journal   (Followers: 11)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 8)
Intermetallics     Hybrid Journal   (Followers: 23)
International Applied Mechanics     Hybrid Journal   (Followers: 3)
International Geophysics     Full-text available via subscription   (Followers: 3)
International Heat Treatment and Surface Engineering     Hybrid Journal   (Followers: 5)
International Journal for Computational Methods in Engineering Science and Mechanics     Hybrid Journal   (Followers: 11)
International Journal for Ion Mobility Spectrometry     Hybrid Journal   (Followers: 1)
International Journal for Simulation and Multidisciplinary Design Optimization     Open Access   (Followers: 4)
International Journal of Abrasive Technology     Hybrid Journal   (Followers: 2)
International Journal of Aeroacoustics     Hybrid Journal   (Followers: 34)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 4)
International Journal of Astronomy and Astrophysics     Open Access   (Followers: 23)
International Journal of Computational Materials Science and Surface Engineering     Hybrid Journal   (Followers: 6)
International Journal of Damage Mechanics     Hybrid Journal   (Followers: 5)
International Journal of Fatigue     Hybrid Journal   (Followers: 36)
International Journal of Fracture     Hybrid Journal   (Followers: 12)
International Journal of Geometric Methods in Modern Physics     Hybrid Journal   (Followers: 2)
International Journal of Heat and Fluid Flow     Hybrid Journal   (Followers: 34)
International Journal of Low Radiation     Hybrid Journal  
International Journal of Low-Carbon Technologies     Open Access   (Followers: 1)
International Journal of Mass Spectrometry     Hybrid Journal   (Followers: 17)
International Journal of Material Forming     Hybrid Journal   (Followers: 1)
International Journal of Materials and Product Technology     Hybrid Journal   (Followers: 4)
International Journal of Mechanical Sciences     Hybrid Journal   (Followers: 12)

        1 2 3 | Last

Journal Cover Colloid Journal
  [SJR: 0.316]   [H-I: 23]   [2 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1608-3067 - ISSN (Online) 1061-933X
   Published by Springer-Verlag Homepage  [2352 journals]
  • Dynamic elasticity of films formed by poly( N -isopropylacrylamide)
           microparticles on a water surface
    • Authors: A. V. Akentiev; G. S. Rybnikova; A. A. Novikova; K. A. Timoshen; I. M. Zorin; B. A. Noskov
      Pages: 571 - 576
      Abstract: Abstract Surface dilatational dynamic elasticity ε of films formed by cross-linked poly(N-isopropylacrylamide) microparticles on a water/air interface has been determined as a function of polymer surface concentration Γ. The experimental dependences exhibit two maxima of ε at surface pressures π of nearly 6 and 35 mN/m. In the region of the second maximum, the pattern of the dependence is governed by a method used to vary Γ. At π > 25 mN/m, film compression leads to the formation of a metastable monolayer, while the gradual addition of a microparticle dispersion results in the establishment of equilibrium between the monolayer and surface aggregates. In the region of π values corresponding to the second maximum of ε, slow relaxation processes with a characteristic time substantially longer than 10 s occur in the system. At π > 35 mN/m, the film collapses due to the displacement of microgel particles from the water surface.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x17050027
      Issue No: Vol. 79, No. 5 (2017)
  • Computer simulation of structuring in aqueous L-cysteine–silver-nitrate
           solutions under the action of initiating salt
    • Authors: P. O. Baburkin; P. V. Komarov; M. D. Malyshev; S. D. Khizhnyak; P. M. Pakhomov
      Pages: 577 - 587
      Abstract: Abstract Structural transformations occurring in aqueous L-cysteine−silver-nitrate mixed solutions (CSSs) upon the addition of an initiating salt have been studied within the framework of mesoscopic simulation using the dissipative particle-dynamics method. Diffusion of silver mercaptide clusters is decelerated, and metastable chain aggregates thereof are formed in a narrow concentration range of the salt, probably due to the transition into a gel-like state. The results obtained are in qualitative agreement with the experimentally observed behavior of CSSs.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x17050039
      Issue No: Vol. 79, No. 5 (2017)
  • Structure and rheology of aqueous poly(vinyl acetate) dispersions modified
           with montmorillonite
    • Authors: V. A. Gerasin; V. V. Kurenkov; O. V. Pashkov; S. O. Ilyin
      Pages: 588 - 595
      Abstract: Abstract It has been shown that the rheological properties and resistance to sedimentation of aqueous poly(vinyl acetate) (PVA) latexes, which are used for the preparation of coatings and adhesives, can be controlled by adding sodium montmorillonite (MMT). The adding of MMT initiates gelation of the PVA dispersions, which manifests itself as the appearance of the yield stress, thixotropy, and viscoelasticity. X-ray diffraction analysis of the complex dispersions and films based on them has shown a transition from exfoliated to intercalated clay tactoids with an increase in their content. In view of the complex composition of the PVA latexes, which contain a stabilizer (poly(vinyl alcohol)) and a plasticizer (dibutyl phthalate), the components that are predominantly intercalated into the MMT interplanar space, have been identified. The highest yield stress and rigidity of the structural network, which arises in a sample as a result of the joint coagulation of PVA and MMT particles, are observed upon the incorporation of 1.2 wt % MMT into the latex.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x17050064
      Issue No: Vol. 79, No. 5 (2017)
  • The use of the finite-element method for calculating the photophoresis
           velocity of large aerosol particles
    • Authors: S. I. Grashchenkov
      Pages: 596 - 604
      Abstract: Abstract The finite-element method has been employed to calculate the photophoresis velocity of solid aerosol particles, the sizes of which are much larger than the mean free path of molecules in a gas. The thermal electromagnetic radiation from the particle surface and the temperature dependences of the density, viscosity, and thermal conductivity of the gaseous medium and particle material have been taken into account. The photophoresis velocity has been numerically calculated for a number of axially symmetric particles moving along their rotation axes. Cylindrical particles, particles having a shape resulting from rhomb rotation around one of its diagonals, and spheroidal particles have been considered.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x17050076
      Issue No: Vol. 79, No. 5 (2017)
  • Evolution of ultrafine gold seed nanoparticles with temperature and time
           and synthesis of plasmonic nanoshells
    • Authors: O. V. Dement’eva; M. E. Kartseva; V. M. Sukhov; V. M. Rudoy
      Pages: 605 - 610
      Abstract: Abstract Features of the evolution of ultrafine gold nanoparticles synthesized by the Duff method with temperature and time have been studied in relation to their use as seeds for the formation of plasmonic nanoshells. A quantitative relation has been revealed between the duration of preheating of such particles at a preset temperature and their size. The obtained relation indicates that Au nanoparticles grow mainly via the Ostwald ripening mechanism. Using anisotropic composite FeOOH/Ag particles as an example, it has been shown that the obtained information may be used to substantially decrease the duration of the synthesis of metal nanoshells on diverse cores.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x17050040
      Issue No: Vol. 79, No. 5 (2017)
  • Extinction coefficients of gold nanoparticles and their dimers. Dependence
           of optical factor on particle size
    • Authors: A. I. Dolinnyi
      Pages: 611 - 620
      Abstract: Abstract The generalized Mie theory has been employed to calculate extinction coefficients κ for isolated gold nanoparticles of different sizes (4–80 nm) and their dimers (κ2) at the maximum of the short-wave plasmon resonance band. It has been found that the value of κ2 essentially depends on both interparticle distance s and particle sizes R. According to the character of variations in the κ2(s) dependence, three ranges of the distances are distinguished, i.e., large, intermediate, and small. In the first range, the κ2 values slightly differ from doubled κ values. Nevertheless a tendency toward an increase in κ2 is distinctly seen as the particles approach each other, and, within some range of s values and for particles with radii R < 15 nm, κ2 is higher than 2κ. For dimers of larger particles, κ2 < 2κ, with its value gradually decreasing with a reduction in the s value. The behavior changes when the particle sizes are of about 50 nm. In the range of small interparticle distances, κ2 values slightly vary with the distance between the particles somewhat decreasing or oscillating with a small amplitude about some mean value. In this range, as the sizes of the gold particles grow, the extinction coefficients of dimers increasingly deviate from the sum of the extinction coefficients of the particles composing the dimers. For 20–80 nm nanoparticles, the size-dependence plotted for the extinction efficiency of dimers in logarithmic coordinates within the range of small interparticle distances is described by a straight line, the slope of which (1.036 ± 0.039) appears to be somewhat smaller than the slope of a corresponding line for individual gold particles (1.274 ± 0.014). The ratio between κ2 and κ predetermines the character of variations in the optical factor as depending on the particle size and the interparticle distance and governs the behavior of the sol turbidity at the stage of nanoparticle dimerization.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x17050052
      Issue No: Vol. 79, No. 5 (2017)
  • Complexes of 1-hexadecyl-4-aza-1-azoniabicyclo[2.2.2]octane bromide with
           transition metal nitrates. Micelle-forming, solubilizing, and adsorption
    • Authors: E. P. Zhiltsova; M. R. Ibatullina; S. S. Lukashenko; F. G. Valeeva; T. N. Pashirova; M. P. Kutyreva; L. Ya. Zakharova
      Pages: 621 - 629
      Abstract: Abstract Amphiphilic complexes of 1-hexadecyl-4-aza-1-azoniabicyclo[2.2.2]octane bromide (D-16) with nitrates of transition metals (La3+, Cu2+, Ni2+, and Co2+) have been synthesized and characterized. Absorption spectrophotometry in the UV, visible, and IR regions, as well as 1Н NMR spectroscopy, have been employed to study their spectral properties in water and organic media. Adsorption properties and micelleforming and solubilizing abilities of the amphiphilic complexes have been investigated in aqueous solutions by the methods of tensiometry and conductometry, as well as by solubilization of a water-insoluble dye (Orange OT). The values of the critical micelle concentration, adsorption parameters at a water/air interface, and solubilization capacity S of complex micelles have been determined. It has been shown that the most pronounced decrease in the critical micelle concentration (as large as two to three times) and differences in the adsorption characteristics and the S values as compared with those of ligand D-16 are observed for complexes of copper and lanthanum. The S values for these complexes are 1.3−2.5 and 3−6.5 times higher than those for D-16 and cetyltrimethylammonium bromide, respectively.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x17050179
      Issue No: Vol. 79, No. 5 (2017)
  • Thermal processes in succinic acid–aluminum blends subjected to
           high-pressure plastic deformation
    • Authors: V. A. Zhorin; M. R. Kiselev; V. I. Roldughin
      Pages: 630 - 636
      Abstract: Abstract The thermal characteristics of powdered aluminum–succinic acid blends subjected plastic deformation under pressures of 0.5−2.0 GPa have been studied. When heated, deformed samples exhibit exothermal processes, which occur at temperatures below the T m of the acid and indicate chemical interactions between succinic acid and aluminum induced by the plastic deformation. The values of the thermal effects depend on the degree of deformation and the pressure of the treatment.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x17050180
      Issue No: Vol. 79, No. 5 (2017)
  • Immobilization of silver nanoparticles obtained by electric discharge
           method on a track membrane surface
    • Authors: O. V. Kristavchuk; I. V. Nikiforov; V. I. Kukushkin; A. N. Nechaev; P. Yu. Apel
      Pages: 637 - 646
      Abstract: Abstract Composite poly(ethylene terephthalate) track membranes containing immobilized silver nanoparticles with the aim of using them for surface-enhanced Raman scattering spectroscopy have been obtained and studied. A dispersion of negatively charged silver nanoparticles has been synthesizes by the method of pulsed electrical discharge between silver electrodes immersed in distilled water. To ensure the electrostatic deposition of nanoparticles onto the track membrane surface, it has been modified with polyethyleneimine. The composition and morphology of the surface of the obtained composite membranes have been studied by X-ray photoelectron spectroscopy and scanning electron microscopy. Aggregation of nanoparticles on the surface has been analyzed. The coefficient of Raman-scattering enhancement has been determined by the example of rhodamine 6G molecules adsorbed on a membrane with immobilized silver nanoparticles.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x17050088
      Issue No: Vol. 79, No. 5 (2017)
  • Numerical simulation of water droplet evaporation into vapor–gas
    • Authors: V. Yu. Levashov; A. P. Kryukov
      Pages: 647 - 653
      Abstract: Abstract Numerical simulation has been employed to consider water droplet evaporation into a vapor–gas medium. An approximate approach has been proposed that makes it possible to take into account the effect of a noncondensable component on the character of variations in the droplet temperature during evaporation. The results of the calculations have been compared with the published experimental data.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x1705009x
      Issue No: Vol. 79, No. 5 (2017)
  • Micellization theory based on the law of mass action with a variable
           aggregation number
    • Authors: A. I. Rusanov
      Pages: 654 - 660
      Abstract: Abstract Variations in the aggregation number of spherical micelles are considered within the micellization theory based on the law of mass action. The mechanism of micellization in a polydisperse aggregated system and the transition to a monodisperse model are explained. A relation between aggregation numbers and chemical potentials of molecules or ions is determined using the curve for equilibrium distribution of aggregates over the aggregation numbers. It is shown that the aggregation numbers of nonionic surfactants unambiguously grow with concentration; however, such a conclusion cannot be drawn for ionic surfactants. For the explicit concentration dependence of the aggregation number, two versions of an analog of the Langmuir equation are proposed to be used, i.e., versions comprising the total surfactant concentration and the concentration of monomers. Comparison with experimental data is carried out by the example of conventional surfactants, namely, sodium dodecyl sulfate and hexadecyltrimethylammonium bromide.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x17050106
      Issue No: Vol. 79, No. 5 (2017)
  • On the calculation of diffusion coefficients and aggregation numbers of
           nonionic surfactants in micellar solutions
    • Authors: A. I. Rusanov; T. G. Movchan; E. V. Plotnikova
      Pages: 661 - 667
      Abstract: Abstract The calculation of the diffusion coefficients of nonionic surfactants as functions of their concentrations in micellar solutions has been analyzed within the framework of the quasi-chemical version of the law of mass action. The methods of the introduction of initial calculation parameters, calculation scheme for an ideal mixture of monomeric molecules and micelles, and corrections for varying solution viscosity have been considered. Numerical estimations have been performed using aqueous tetraoxyethylene octyl ether, pentaoxyethylene hexyl ether, and octyl-β-D-glucopyranoside solutions as examples.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x17050118
      Issue No: Vol. 79, No. 5 (2017)
  • A study of the physicochemical properties and structure of moxifloxacin
           complex with methyl-β-cyclodextrin
    • Authors: A. A. Skuredina; I. M. Le-Deygen; I. V. Uporov; E. V. Kudryashova
      Pages: 668 - 676
      Abstract: Abstract The physicochemical properties and structure of moxifloxacin‒methyl-β-cyclodextrin complex have been studied by UV spectroscopy, FTIR spectroscopy, and computer simulation. The optimal conditions for the formation of the complex have been determined, and the dissociation constant of the complex in acidic media (K dis = (5.0 ± 0.3) × 10–5 М) has been obtained. It has been found that complexation significantly slows down the release of the drug in acidic media. Experimental results are in good agreement with computer simulation data. The following mechanism of complex formation has been proposed: the incorporation of the aromatic fragment of moxifloxacin into the cavity of methyl-β-cyclodextrin is followed by additional stabilization of the complex via multiple hydrophobic interactions and hydrogen bonding.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x17050143
      Issue No: Vol. 79, No. 5 (2017)
  • Determination of the surface potential for hollow-fiber membranes by the
           streaming-potential method
    • Authors: V. D. Sobolev; A. N. Filippov; T. A. Vorob’eva; I. P. Sergeeva
      Pages: 677 - 684
      Abstract: Abstract A procedure has been proposed for measuring the surface potential of hollow-fiber membranes by the streaming-potential method under the conditions of a tangential flow of a solution. The zeta-potential and surface charge of nanofiltration hollow-fiber polyacrylonitrile membranes have been measured. The measurements have been performed for membranes with different porosities, which were obtained by partial drying of initial humid membranes. The porosity has been determined from the electrical conductivity of a membrane. An equation has been proposed for calculating the charge transfer by a solution flow in a porous layer. It has been shown that the use of the proposed equation makes it possible to obtain more correct values of the membrane surface potential.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x17050155
      Issue No: Vol. 79, No. 5 (2017)
  • Water-vapor clustering on the surface of β-AgI crystal in the field of
           defects with a disordered structure
    • Authors: S. V. Shevkunov
      Pages: 685 - 700
      Abstract: Abstract The Monte Carlo method has been employed to simulate the nucleation of condensed water phase from vapor at 260 K on a crystalline silver-iodide surface containing a defect in the form of a nanoscopic spot with a random distribution of ions. The free energy and work of formation of a nucleus have been calculated in the bicanonical ensemble at the molecular level as functions of nucleus size; computer images and spatial correlation functions of molecules have been obtained. The presence of a defect with a disordered (amorphous) structure, on the one hand, entails local destructions of a monomolecular film, but, on the other hand, shifts the onset of the adsorption process toward lower vapor pressures by several orders of magnitude. Under the conditions of a growing condensate film, the defect leads to its thermodynamic stabilization and a decrease in the barrier of the formation of subsequent layers, thereby weakening the known effect of the hydrophobicity of monomolecular films on crystalline surfaces with hexagonal structures. The factors that predetermine the abnormally high efficiency of silver-iodide particles as stimulators for atmospheric-moisture nucleation at negative Celsius temperatures seem to be the presence of extended defects on the surface of aerosol particles in combination with the hexagonal structure of their crystal lattice, the optimum magnitude of direct interactions between water molecules with ions of the crystal surface layer, and the collective domain-formation effects that result from a relatively high polarizability of iodine ions.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x1705012x
      Issue No: Vol. 79, No. 5 (2017)
  • Supramolecular microporous structures based on carbon nanotubes and
           coordinating cumene (C 9 H 12 ) molecules
    • Authors: A. V. Shkolin; A. A. Fomkin
      Pages: 701 - 706
      Abstract: Abstract A method has been proposed for the formation of self-organized ensembles of carbon nanotubes with the use of coordinating cumene molecules and the development of secondary porosity in the obtained structures. It has been shown that the fraction of nanotubes coordinated into an array grows with increasing molar ratio between cumene molecules and carbon nanotubes upon the synthesis of the supramolecular structures. The secondary porosity develops due to partial desorption of the coordinating molecules from the obtained structure. A supramolecular structure with a residual cumene content of 50 wt % possesses the best adsorption characteristics for the described system. Specific adsorption of nitrogen on the “carbon nanotubes–cumene (50 wt %)” supramolecular structure at 293 K is more than an order of magnitude higher than that on the initial nanotubes. The structure-related energy parameters of the experimentally obtained supramolecular systems have been determined by molecular dynamics methods. The calculation in terms of the theory of volume filling of micropores has shown that the secondary pores of the obtained structures can accumulate methane and hydrogen in amounts as large as 213 nm3/m3 and 4 wt %, respectively.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x17050131
      Issue No: Vol. 79, No. 5 (2017)
  • Adsorption of nonionic surfactant on porous and nonporous poly(ethylene
           terephthalate) films
    • Authors: Yu. Yamauchi; I. V. Blonskaya; P. Yu. Apel
      Pages: 707 - 714
      Abstract: Abstract The application of surfactants in the chemical etching of track membranes enables one to control their pore shape. To find out the mechanism of the surfactant action on the track etching in the nanometer range of pore sizes, the adsorption of a nonionic surfactant (polyoxyethyelene-4-nonylphenyl ether) on porous and nonporous poly(ethylene terephthalate) films has been studied. The experimental results have been analyzed in comparison with the data previously obtained on the adsorption of an anionic surfactant on similar films. It has been concluded that the behaviors of anionic and nonionic surfactants in negatively charged pores about 100 nm in radius are strongly different due to the electrostatic exclusion of co-ions from the pores, which is of significance only for compounds dissociating into ions.
      PubDate: 2017-09-01
      DOI: 10.1134/s1061933x17050167
      Issue No: Vol. 79, No. 5 (2017)
  • Methodological features of mass-spectrometric studies of oxidized metal
    • Authors: I. S. Pytskii; E. S. Kuznetsova; S. D. Iartsev; A. K. Buryak
      Pages: 526 - 531
      Abstract: Abstract Clustering of silver halides under the conditions of photoionization has previously been studied by laser desorption/ionization mass spectrometry. Some features of desorption/ionization of silver halides from different metal surfaces (stainless steel and different partially oxidized aluminum alloys) are discussed in this study. The data on the m/z values determination accuracy, resolving power, ionization efficiency, and distortion of isotope distribution in the studies of oxidized surfaces are statistically generalized. It is shown that the results can be used to gain insight into the chemical nature and morphology of examined surfaces and, in particular, to plot diagrams for distribution of analyzed compounds over the surfaces.
      PubDate: 2017-07-01
      DOI: 10.1134/s1061933x17040111
      Issue No: Vol. 79, No. 4 (2017)
  • On the Schroeder paradox for nonionogenic polymers
    • Authors: V. I. Roldughin; L. V. Karpenko-Jereb
      Pages: 532 - 539
      Abstract: Abstract The well-known Schroeder paradox, i.e., the difference in the degrees of swelling of nonionogenic polymers occurring at equilibrium with liquid and vapor phases, has been discussed. A simple example has been presented, which illustrates the unavoidability of different degrees of swelling for a polymer brought into contact with vapor and liquid phases. A simple mechanism has been proposed for the excess swelling of a nonionogenic polymer immersed in a liquid phase, this mechanism being associated with the action of van der Waals and solvation forces at a polymer/solvent interface. The estimation of the contribution from the van der Waals interaction to the “excess” swelling has shown that the predicted values of the “excess” swelling agree with the data of real experiments.
      PubDate: 2017-07-01
      DOI: 10.1134/s1061933x17040123
      Issue No: Vol. 79, No. 4 (2017)
  • Hydrogen diffusion transfer through an asymmetric three-layer vanadium
    • Authors: V. V. Ugrozov
      Pages: 549 - 555
      Abstract: Abstract Hydrogen diffusion transfer through a three-layer membrane has been studied within the framework of the lattice model under the Bragg‒Williams approximation. A set of equations describing hydrogen transfer through a vanadium membrane coated with thin palladium layers has been derived taking into account the interactions of hydrogen atoms in the membrane layers. The obtained equations have been solved using the Mathcad-14 software package. It has been shown that the interaction between hydrogen atoms has a significant influence on hydrogen permeability at near-atmospheric pressures. It has been found that the permeability of the vanadium membrane is markedly higher than that of a palladium one at the same thickness. The effect of asymmetric vanadium membrane embrittlement has been shown to depend on the location of palladium layers with different thicknesses. The embrittlement of the vanadium membrane begins at higher pressures, when a thicker palladium layer is located at the inlet. It has been revealed that, for asymmetric membranes, the value of the diffusion flux of hydrogen atoms may depend on the transfer direction. At the same membrane thickness, the permeability of the asymmetric membrane is actually equal to that of a symmetrical membrane, provided that a thicker palladium layer is located at the inlet. At the opposite orientation, of the permeability of the asymmetric membrane is lower than that of the symmetric one.
      PubDate: 2017-07-01
      DOI: 10.1134/s1061933x17040160
      Issue No: Vol. 79, No. 4 (2017)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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