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  Subjects -> PHYSICS (Total: 795 journals)
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PHYSICS (579 journals)                  1 2 3 | Last

Showing 1 - 200 of 741 Journals sorted alphabetically
Acta Acustica united with Acustica     Full-text available via subscription   (Followers: 5)
Acta Mechanica     Hybrid Journal   (Followers: 17)
Acta Scientifica Naturalis     Open Access  
Advanced Composite Materials     Hybrid Journal   (Followers: 59)
Advanced Functional Materials     Hybrid Journal   (Followers: 43)
Advanced Materials     Hybrid Journal   (Followers: 205)
Advanced Science Focus     Free   (Followers: 3)
Advanced Structural and Chemical Imaging     Open Access   (Followers: 2)
Advances in Condensed Matter Physics     Open Access   (Followers: 6)
Advances in Exploration Geophysics     Full-text available via subscription   (Followers: 2)
Advances in Geophysics     Full-text available via subscription   (Followers: 5)
Advances in High Energy Physics     Open Access   (Followers: 16)
Advances in Imaging and Electron Physics     Full-text available via subscription   (Followers: 2)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 15)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 11)
Advances in OptoElectronics     Open Access   (Followers: 3)
Advances In Physics     Hybrid Journal   (Followers: 10)
Advances in Physics Theories and Applications     Open Access   (Followers: 12)
Advances in Remote Sensing     Open Access   (Followers: 29)
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: 3)
American Journal of Signal Processing     Open Access   (Followers: 8)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 2)
Annalen der Physik     Hybrid Journal   (Followers: 4)
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: 3)
Annual Review of Analytical Chemistry     Full-text available via subscription   (Followers: 9)
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: 10)
Applied Composite Materials     Hybrid Journal   (Followers: 42)
Applied Physics A     Hybrid Journal   (Followers: 7)
Applied Physics Frontier     Open Access   (Followers: 1)
Applied Physics Letters     Hybrid Journal   (Followers: 34)
Applied Physics Research     Open Access   (Followers: 4)
Applied Physics Reviews     Hybrid Journal   (Followers: 9)
Applied Radiation and Isotopes     Hybrid Journal   (Followers: 6)
Applied Remote Sensing Journal     Open Access   (Followers: 29)
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  
Astronomy & Geophysics     Hybrid Journal   (Followers: 8)
Astronomy and Astrophysics Review     Hybrid Journal   (Followers: 5)
Astrophysical Journal Supplement Series     Full-text available via subscription   (Followers: 4)
Atoms     Open Access  
Attention, Perception & Psychophysics     Full-text available via subscription   (Followers: 8)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 7)
Axioms     Open Access  
Bangladesh Journal of Medical Physics     Open Access  
Bauphysik     Hybrid Journal   (Followers: 2)
Biomaterials     Hybrid Journal   (Followers: 42)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 16)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 26)
Biophysical Reviews     Hybrid Journal  
Biophysical Reviews and Letters     Hybrid Journal   (Followers: 2)
BMC Biophysics     Open Access   (Followers: 5)
Boson Journal of Modern Physics     Open Access  
Brazilian Journal of Physics     Hybrid Journal  
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 9)
Bulletin of Materials Science     Open Access   (Followers: 40)
Bulletin of the Atomic Scientists     Full-text available via subscription   (Followers: 3)
Bulletin of the Lebedev Physics Institute     Hybrid Journal   (Followers: 1)
Bulletin of the Russian Academy of Sciences: Physics     Hybrid Journal  
Caderno Brasileiro de Ensino de Física     Open Access  
Canadian Journal of Physics     Full-text available via subscription   (Followers: 1)
Case Studies in Nondestructive Testing and Evaluation     Open Access   (Followers: 6)
Cells     Open Access   (Followers: 1)
CERN courier. International journal of high energy physics     Free   (Followers: 6)
Chemical Physics of Solid Surfaces     Full-text available via subscription  
Chinese Journal of Astronomy and Astrophysics     Full-text available via subscription   (Followers: 3)
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  
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: 2)
Complex Analysis and its Synergies     Open Access   (Followers: 1)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 156)
Composites Part B : Engineering     Hybrid Journal   (Followers: 197)
Computational Astrophysics and Cosmology     Open Access  
Computational Condensed Matter     Open Access  
Computational Materials Science     Hybrid Journal   (Followers: 20)
Computational Mathematics and Mathematical Physics     Hybrid Journal   (Followers: 1)
Computational Particle Mechanics     Hybrid Journal   (Followers: 1)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computer Physics Communications     Hybrid Journal   (Followers: 3)
Contemporary Concepts of Condensed Matter Science     Full-text available via subscription  
Contemporary Physics     Hybrid Journal   (Followers: 16)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 6)
Contributions to Plasma Physics     Hybrid Journal   (Followers: 3)
COSPAR Colloquia Series     Full-text available via subscription   (Followers: 5)
Cryogenics     Hybrid Journal   (Followers: 44)
Current Applied Physics     Full-text available via subscription   (Followers: 4)
Current Science     Open Access   (Followers: 35)
Diagnostic and Interventional Imaging     Full-text available via subscription  
Diamond and Related Materials     Hybrid Journal   (Followers: 11)
Doklady Physics     Hybrid Journal   (Followers: 1)
Dynamical Properties of Solids     Full-text available via subscription  
ECS Journal of Solid State Science and Technology     Full-text available via subscription   (Followers: 3)
EDUSAINS     Open Access  
Egyptian Journal of Remote Sensing and Space Science     Open Access   (Followers: 18)
EJNMMI Physics     Open Access  
Electrospinning     Open Access  
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 38)
Energy Procedia     Open Access   (Followers: 2)
Engineering Failure Analysis     Hybrid Journal   (Followers: 64)
Engineering Fracture Mechanics     Hybrid Journal   (Followers: 21)
Environmental Fluid Mechanics     Hybrid Journal   (Followers: 3)
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: 6)
European Journal of Physics Education     Open Access   (Followers: 3)
European Physical Journal - Applied Physics     Full-text available via subscription   (Followers: 7)
European Physical Journal C     Hybrid Journal   (Followers: 1)
Europhysics News     Open Access  
Experimental Mechanics     Hybrid Journal   (Followers: 21)
Experimental Methods in the Physical Sciences     Full-text available via subscription  
Experimental Techniques     Hybrid Journal   (Followers: 56)
Exploration Geophysics     Hybrid Journal   (Followers: 3)
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: 10)
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: 9)
Geochemistry, Geophysics, Geosystems     Full-text available via subscription   (Followers: 24)
Geografiska Annaler, Series A: Physical Geography     Hybrid Journal   (Followers: 3)
Geophysical Research Letters     Full-text available via subscription   (Followers: 82)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 61)
Glass Physics and Chemistry     Hybrid Journal   (Followers: 3)
Global Journal of Physics     Open Access   (Followers: 1)
Granular Matter     Hybrid Journal   (Followers: 1)
Graphs and Combinatorics     Hybrid Journal   (Followers: 6)
Gravitation and Cosmology     Hybrid Journal   (Followers: 2)
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: 2)
Handbook of Thermal Analysis and Calorimetry     Full-text available via subscription  
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 3)
Heat Transfer - Asian Research     Hybrid Journal   (Followers: 9)
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: 58)
IET Optoelectronics     Hybrid Journal   (Followers: 1)
Il Colle di Galileo     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: 5)
Indian Journal of Pure & Applied Physics (IJPAP)     Open Access   (Followers: 14)
Indian Journal of Radio & Space Physics (IJRSP)     Open Access   (Followers: 16)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 25)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 5)
Infinite Dimensional Analysis, Quantum Probability and Related Topics     Hybrid Journal  
InfraMatics     Open Access  
Infrared Physics & Technology     Hybrid Journal  
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: 3)
International Journal for Computational Methods in Engineering Science and Mechanics     Hybrid Journal   (Followers: 10)
International Journal for Ion Mobility Spectrometry     Hybrid Journal   (Followers: 1)
International Journal for Simulation and Multidisciplinary Design Optimization     Open Access   (Followers: 2)
International Journal of Abrasive Technology     Hybrid Journal   (Followers: 2)
International Journal of Aeroacoustics     Full-text available via subscription   (Followers: 27)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 4)
International Journal of Astronomy and Astrophysics     Open Access   (Followers: 8)
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: 35)
International Journal of Fracture     Hybrid Journal   (Followers: 11)
International Journal of Geometric Methods in Modern Physics     Hybrid Journal   (Followers: 1)
International Journal of Geophysics     Open Access   (Followers: 5)
International Journal of Heat and Fluid Flow     Hybrid Journal   (Followers: 31)
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: 16)
International Journal of Material Forming     Hybrid Journal  
International Journal of Materials and Product Technology     Hybrid Journal   (Followers: 4)
International Journal of Mechanical Sciences     Hybrid Journal   (Followers: 11)

        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  [2335 journals]
  • The influence of electronic polarizability of components on the electric
           field of an ionic micelle according to molecular simulation data
    • Authors: E. N. Brodskaya; A. A. Vanin
      Pages: 429 - 434
      Abstract: Abstract Molecular dynamics simulation of a cationic micelle having a rigid hydrophobic core and mobile cationic head groups has been performed taking into account the electronic contribution into solution polarization. As compared with an analogous micelle previously considered with no regard to the polarization effects, the latter manifest themselves as a weaker structuring of micelle crown and greater concentrating of counterions in it. Analysis of the local electric potential has indicated that the discrepancy between the data of the continual and atomistic descriptions of water remains preserved. Thus, agreement between the theory and numerical experiment cannot be achieved when describing the local electric potential with no allowance for the local character of polarization.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040025
      Issue No: Vol. 78, No. 4 (2016)
  • Optimization of photothermal methods for laser hyperthermia of malignant
           cells using bioconjugates of gold nanoparticles
    • Authors: V. S. Gerasimov; A. E. Ershov; S. V. Karpov; S. P. Polyutov; P. N. Semina
      Pages: 435 - 442
      Abstract: Abstract Selective action of laser radiation on membranes of malignant cells has been studied in different regimes using conjugates of gold nanoparticles with oligonucleotides by the example of DNA aptamers. Under the conditions of a contact between a bioconjugate and a cell surface and the development of substantial and rapidly relaxing temperature gradients near a nanoparticle, the membranes of malignant cells alone are efficiently damaged due to the local hyperthermia of a cellular membrane. It has been shown that employment of pulsed instead of continuous wave laser radiation provides the localization of the damaging action, which does not involve healthy cells.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040050
      Issue No: Vol. 78, No. 4 (2016)
  • Kinetics of mechanochemical dissolution of chromium in iron
    • Authors: E. P. Yelsukov; A. L. Ul’yanov; D. A. Kolodkin; V. E. Porsev
      Pages: 443 - 447
      Abstract: Abstract The kinetics of solid Fe–Cr solution formation has been studied during mechanical alloying of Fe and Cr powders taken in an atomic ratio of 80: 20. X-ray diffraction and Mössbauer spectroscopy data have been analyzed within the framework of the energetic approach. It has been established that, in this system, reaction product yield N is related to mechanical energy dose D and specific surface area S of Fe nanograin boundaries in an ideal manner: N ~ D 2 at S ~ D and N ~ D at S = const.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040049
      Issue No: Vol. 78, No. 4 (2016)
  • Studies about the influence of self-organization of colloidal magnetic
           nanoparticles on the magnetic Néel relaxation time
    • Authors: Matteo Cacciola; Mihaela Osaci
      Pages: 448 - 458
      Abstract: Abstract The monodomain magnetic nanoparticle-based colloids are mainly used in biomedical applications. In this type of colloids, there is a tendency of agglomeration even in the absence of external magnetic field. So, the Néel magnetic relaxation time of the system is affected by that tendency. In this paper, we propose a model to study how the nanoparticle tendency to agglomerate in the nanofluid affects the Néel relaxation time of the system. For simulating the self-organization of colloidal nanoparticles, we apply a Monte Carlo method, and the Néel magnetic relaxation time is assessed through the adaptation and solution of Coffey equations in oblique magnetic field, adapted to the local magnetic field on a nanoparticle.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040037
      Issue No: Vol. 78, No. 4 (2016)
  • The effect of gas slip on pressure drop and deposition of submicron
           particles in model granular filters
    • Authors: V. A. Kirsh; A. A. Kirsh
      Pages: 459 - 464
      Abstract: Abstract The Stokes flow field and aerosol particle deposition from flows in model filters, i.e., separate layers of granules with square and hexagonal structures, have been calculated taking into account the effect of gas slip at granule surface. Approximating formulas have been derived for granule drag forces to a flow. The efficiencies of diffusion collection of particles have been calculated in a wide range of Peclet numbers with allowance for a finite particle size and the existence of a Knudsen boundary layer, the layer thickness being comparable with the particle sizes. The applicability of the cell model to the calculation of granular filters has been discussed.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040086
      Issue No: Vol. 78, No. 4 (2016)
  • The effect of gas slip on pressure drop and deposition of submicron
           particles in fibrous filters
    • Authors: V. A. Kirsh; A. V. Shabatin; I. N. Senchikhin; S. A. Semenov
      Pages: 465 - 471
      Abstract: Abstract The effect of gas slip at fibers on the drag to a flow and the deposition of submicron particles in model filters with a tree-dimensional flow field has been considered. The average values of the drag force and the efficiency of diffusion collection of particles with finite sizes in a double hexagonal three-dimensional model filter taken as a standard uniform filter have been calculated as depending on the packing density of fibers and the Knudsen number. It has been shown that, in the region of the sizes of the most penetrating particles, under preset conditions, and at specified filter parameters, the obtained collection efficiency values agree with the results of calculations performed by empirical formulas for a model fan filter. Moreover, formulas derived for a planar flow taking into account the slip effect are applicable to highly porous filters.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040098
      Issue No: Vol. 78, No. 4 (2016)
  • Bulk condensation in a dusty vapor–gas flow with regard to dust
           particle size distribution
    • Authors: N. M. Kortsenshteyn; A. K. Yastrebov
      Pages: 472 - 477
      Abstract: Abstract Bulk condensation in a dusty vapor–gas flow has been numerically simulated taking into account dust particle size distribution. Two types of distribution (monodisperse and lognormal) have been used. Changes in the bulk condensation process that are relevant to the dustiness of the flow have been revealed by comparing the results obtained for dust-free and dusty flows at the monodisperse dust distribution. Variations in the relative contributions of the homogeneous and heterogeneous mechanisms with variations in the flow dustiness have been considered. The effect of the root-mean-square deviation in the dust particle sizes on the bulk condensation in the dusty flow has been illustrated by comparing the data obtained for the monodisperse and lognormal distributions.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040104
      Issue No: Vol. 78, No. 4 (2016)
  • Synthesis and aggregation stability of europium oxohydroxide hydrosols
    • Authors: A. V. Malova; A. S. Grodskii; I. A. Belova
      Pages: 478 - 484
      Abstract: Abstract Europium oxohydroxide hydrosols that are resistant to aggregation have been obtained by the condensation method. The density of dispersed phase particles, phase composition and dispersity of the sols, electrokinetic potential of the particles, and its dependence on medium pH have been determined. The effect of dispersion medium pH on the mechanism and reversibility of particle aggregation has been studied. The nature of the aggregation stability of the synthesized europium oxohydroxide hydrosols has been discussed.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040116
      Issue No: Vol. 78, No. 4 (2016)
  • Solvent replacement (decane → hexane) in concentrated silver organosols
           stabilized with sodium bis(2-ethylhexyl) sulfosuccinate
    • Authors: P. S. Popovetskiy; N. O. Shaparenko; A. T. Arymbaeva; A. I. Bulavchenko
      Pages: 485 - 491
      Abstract: Abstract The structure-related properties of silver nanoparticles synthesized in reverse micellar solutions of sodium bis(2-ethylhexyl) sulfosuccinate (AOT) have been studied in the processes of electrophoretic concentraton of nanoparticles, drying of concentrates, and redispersion in n-hexane and n-decane. It has been shown that the dispersity of nanoparticles and stability of organosols to aggregation remain preserved upon the replacement of a low-volatile solvent (decane) by a high-volatile solvent (hexane). The developed procedures enable one to easily regulate important technological characteristics of metal-based inkjet “nanoinks,” such as concentration and size of particles, as well as viscosity and drying rate of the inks.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040128
      Issue No: Vol. 78, No. 4 (2016)
  • Study of cryostructuring of polymer systems. 42. Physicochemical
           properties and microstructure of wide-porous covalently cross-linked
           albumin cryogels
    • Authors: I. A. Rodionov; N. V. Grinberg; T. V. Burova; V. Ya. Grinberg; V. I. Lozinsky
      Pages: 492 - 504
      Abstract: Abstract Chemically cross-linked wide-porous protein cryogels have been obtained by freezing aqueous bovine serum albumin (BSA) solutions (30–50 g/L) at–15,–20, or–25°C in the presence of water-soluble carbodiimide (CDI) as a coupling agent. It has been shown that the gel-fraction yield and the swelling extent of the polymer phase of the formed spongy matrices depend primarily on the initial concentration of albumin and the amount of CDI added to a system, while the morphometric characteristics of the porous microstructure of the BSA cryogels are mainly determined by the temperature of the cryogenic treatment. The sizes of macropores in the obtained cryogels range from ≈50 to ≈200 μm. A high-sensitivity differential scanning calorimetric study of the conformational state of protein macromolecules incorporated into the spatial network of the polymer phase (gel walls of macropores) of the cryogels has shown that, during the cryotropic gelation, the native structure of albumin globules is subjected to “cold denaturation,” and the partly unfolded conformation of the protein is, simultaneously, fixed by intermolecular covalent cross links.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x1603011x
      Issue No: Vol. 78, No. 4 (2016)
  • Novel nanocomposites based on silver nanoparticles and mixed epoxyamine
    • Authors: I. N. Senchikhin; O. Ya. Uryupina; E. S. Zhavoronok; V. V. Vysotskii; V. I. Roldughin
      Pages: 505 - 508
      Abstract: Abstract A procedure has been proposed for the direct synthesis (without the use of reductants) of silver nanoparticles in an epoxy polymer matrix with the formation of novel nanocomposites. The average size of the formed nanoparticles has been shown to be about 18 nm. The polymer cross linking leads to the formation of chain aggregates of the nanoparticles. Nanocomposites containing isolated (individual) silver nanoparticles can also be obtained.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040141
      Issue No: Vol. 78, No. 4 (2016)
  • Phenomenological formula for thermal conductivity coefficient of
           water-based nanofluids
    • Authors: D. Ceotto; V. Ya. Rudyak
      Pages: 509 - 514
      Abstract: Abstract A phenomenological formula has been proposed to describe the thermal conductivity of waterbased nanofluids. The formula has been derived based on available experimental data on nanofluids containing Al2O3 particles. It takes into account the dependence of the thermal conductivity coefficients of the nanofluids on both volume concentration and sizes of the particles. The formula has also been shown to describe with an accuracy of about 3% the thermal conductivity coefficients of nanofluids containing TiO2, SiO2, ZrO2, and CuO particles with sizes of 8–150 nm and volume concentrations as high as 8%.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040153
      Issue No: Vol. 78, No. 4 (2016)
  • Specific features of polyol synthesis of silver nanoparticles with the use
           of solid carboxylates as precursors
    • Authors: A. I. Titkov; E. Yu. Gerasimov; M. V. Shashkov; O. A. Logutenko; N. V. Bulina; Yu. M. Yukhin; N. Z. Lyakhov
      Pages: 515 - 524
      Abstract: Abstract Electron microscopy, X-ray diffraction, and chromatography-mass spectrometry have been employed to investigate the reduction of solid silver caprylate in ethylene glycol with the formation of silver nanoparticles. The structural characteristics of silver nanoparticles have been studied as depending on the conditions of their synthesis, including temperature, reduction time, and silver salt concentration. It has been found that, in the studied range of parameters under the conditions, when solid silver caprylate is dispersed in ethylene glycol, the characteristics of resulting nanoparticles are almost independent of the synthesis temperature. This peculiarity is related to the fact that the formation and growth of nanoparticles occur on the surface of silver salt crystals and are accompanied by gradual dissolution thereof. In this system, ethylene glycol plays the roles of a reductant and a solvent for liquid reaction products.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040189
      Issue No: Vol. 78, No. 4 (2016)
  • Mechanochemical synthesis of colloidal silver bromide particles in the
           NaBr–AgNO 3 –NaNO 3 system
    • Authors: F. Kh. Urakaev; B. B. Tatykaev; M. M. Burkitbayev; A. M. Bakhadur; B. M. Uralbekov
      Pages: 525 - 532
      Abstract: Abstract X-ray diffraction and thermal analyses, electron microscopy, and dynamic light scattering have been employed to study silver bromide nanoparticles obtained by the mechanochemical exchange reaction NaBr + AgNO3 + zNaNO3 = (z + 1)NaNO3 + AgBr in sodium nitrate matrix (diluent and side reaction product) at z = z 1 = 8.06 and z = z 2 = 4.31. AgBr nanoparticles have been obtained in the free form by dissolving the matrix in water, and their activity in the photodegradation of methylene blue dye has been studied.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040190
      Issue No: Vol. 78, No. 4 (2016)
  • Intercalation of salicylic acid into ZnAl and MgAl layered double
           hydroxides for a controlled release formulation
    • Authors: Manel Haraketi; Khaled Hosni; Ezzeddine Srasra
      Pages: 533 - 541
      Abstract: Abstract Salicylic acid was intercalated into an inorganic host consisting of ZnAl/MgAl-layered double hydroxides lamella by reconstruction method. Powder X-ray diffractograms showed that the basal spacing of the layered double hydroxide bearing salicylate as the intergallery anion expanded from 7.6 and 7.8 Å in the precursors to 14.49 Å and 14.85 in ZnAl and MgAl layered double hydroxide, respectively. These values suggest that the organic molecules form bilayers in the interlayer space. Fourier transform infrared study further confirmed intercalation of salicylate into the interlayer’s of the layered double hydroxides. The thermal stability of the intercalated salicylic acid is significantly enhanced compared with the pure form before intercalation. Using the XRD results combined with a molecular simulation model, a possible representation of the salicylate anion positioning between the lamellar layers has been proposed. The in vitro drug release from intercalated material was remarkably lower than that from the corresponding physical mixture at pH 7.5. The kinetic analysis showed the importance of the diffusion through the particle in controlling the drug release rate. The obtained results show that hydrotalcite may be used to prepare modified release formulations.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040062
      Issue No: Vol. 78, No. 4 (2016)
  • Water vapor nucleation on ion pairs under the conditions of a planar
    • Authors: S. V. Shevkunov
      Pages: 542 - 552
      Abstract: Abstract Computer simulation has been employed to study the effect of a confined space of a planar model pore with structureless hydrophobic walls on the hydration of Na+Cl– ion pairs in water vapor at room temperature. A detailed many-body model of intermolecular interactions has been used. The model has been calibrated relative to experimental data on the free energy and enthalpy of the initial reactions of water molecule attachment to ions and the results of quantum-chemical calculations of the geometry and energy of Na+Cl– (H2O) N clusters in stable configurations, as well as spectroscopic data on Na+Cl– dimer vibration frequencies. The free energy and work of hydration, as well as the adsorption curve, have been calculated from the first principles by the bicanonical statistical ensemble method. The dependence of hydration shell size on interionic distance has been calculated by the method of compensation potential. The transition between the states of a contact (CIP) and a solvent-separated ion pair (SSIP) has been reproduced under the conditions of a nanopore. The influence of the pore increases with the hydration shell size and leads to the stabilization of the SSIP states, which are only conditionally stable in bulk water vapor.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040177
      Issue No: Vol. 78, No. 4 (2016)
  • Key thermodynamic characteristics of nucleation on charged and neutral
           cores of molecular sizes in terms of the gradient density functional
    • Authors: A. K. Shchekin; T. S. Lebedeva; D. V. Tatyanenko
      Pages: 553 - 565
      Abstract: Abstract The gradient density functional theory and the Carnahan–Starling model formulated for describing the contribution of hard spheres have been used to calculate the profiles of condensate density in small critical droplets formed via homogeneous nucleation, as well as in stable and critical droplets formed via heterogeneous nucleation on solid charged and neutral condensation cores of molecular sizes. The calculations performed for water and argon at different values of condensate chemical potential have yielded the heights of the activation barriers for homoand heterogeneous nucleation as functions of vapor supersaturation at preset system temperatures. The interaction of condensate molecules with a solid core has been described by the resultant potential of molecular attractive forces. In the case of a charged core, the long-range Coulomb potential of electric forces has additionally been taken into account. Dielectric permittivities have been calculated as known functions of the local density of the fluid and temperature. The radius of the equimolecular droplet surface has been chosen as a variable describing the droplet size. Dependences of the chemical potential of condensate molecules in a droplet on its size have been plotted for water and argon with allowance for the action of capillary, electrostatic, and molecular forces. It has been shown that the role of the molecular force potential in heterogeneous nucleation increases with the size of condensation cores.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040165
      Issue No: Vol. 78, No. 4 (2016)
  • Synthesis and surface treatment of magnetite nanoparticles for tuning
           hydrophobicity and colloidal stability
    • Authors: Sushilkumar A. Jadhav; Roberta Bongiovanni; Daniele Marchisio
      Pages: 566 - 572
      Abstract: Abstract Post-synthetic surface modification of magnetite nanoparticles synthesized by a modified co-precipitation process was carried out with triethoxy-terminated perfluoropolyether (PFPE) oligomers. The chemisorption of PFPE oligomers on the surface of magnetites was confirmed by ATR-FTIR and TGA analyses. The efficiency of surface modification of the oligomer to prevent the aggregation of magnetite nanoparticles was studied with the dynamic light scattering technique by measuring the hydrodynamic diameter and polydispersity index of the surface treated nanoparticles, together with their zeta potential. Aggregation kinetics profiles were constructed for surface treated nanoparticles. The obtained data was compared with magnetite nanoparticles treated with critic acid, to assess the efficiency of the surface modification with the PFPE oligomers. The comparison showed that the bifunctional PFPE oligomer treated nanoparticles are characterized by improved colloidal stability and hydrophobicity.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x16040074
      Issue No: Vol. 78, No. 4 (2016)
  • Electrosurface properties of poly(ethylene terephthalate) films irradiated
           by heavy ions and track membranes based on these films
    • Authors: K. G. Sabbatovskii; A. I. Vilenskii; V. D. Sobolev
      Pages: 573 - 575
      Abstract: Abstract The streaming potential method realized in a slit-like setup using 10–4–10–2 mol/L KCl solutions has been employed to study the electrosurface characteristics of poly(ethylene terephthalate) films, both initial and irradiated by heavy ions, as well as track membranes with pore sizes of 50 and 210 nm made from these films. Their ζ potentials and surface charges have been calculated. The data obtained suggest that irradiation of the polymer films by heavy ions reduce the ζ potential and surface charge. However, as a result of film etching during the preparation of the track membranes, the ζ potential and surface charge increase and exceed the corresponding values for the initial film.
      PubDate: 2016-07-01
      DOI: 10.1134/s1061933x1604013x
      Issue No: Vol. 78, No. 4 (2016)
  • The structure and conductivity of thin composite films formed from
           nanodispersions of silver particles by the moving meniscus method
    • Authors: V. V. Vysotskii; V. I. Roldughin; O. Ya. Uryupina; I. N. Senchikhin; A. V. Zaitseva
      Pages: 315 - 321
      Abstract: Abstract The formation processes, structure, geometric parameters, and conductivity are studied for thin composite films prepared from nanodispersions of silver particles with diameters smaller than 10 nm by the moving meniscus method. The thickness and conductivity of the films are determined as functions of the mass concentration of a precursor (AgNO3) and the concentration (size) of silver nanoparticles. Some of these functions are nonmonotonic. The dependences of the conductivity on these parameters are found to have the character of a percolation transition. Heterogeneous crystallization of soluble components of the colloidal solutions on silver nanoparticles plays an essential role in the formation of the films.
      PubDate: 2016-05-01
      DOI: 10.1134/s1061933x16030194
      Issue No: Vol. 78, No. 3 (2016)
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