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PHYSICS (580 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: 60)
Advanced Functional Materials     Hybrid Journal   (Followers: 43)
Advanced Materials     Hybrid Journal   (Followers: 210)
Advanced Science Focus     Free   (Followers: 3)
Advanced Structural and Chemical Imaging     Open Access   (Followers: 2)
Advances in Condensed Matter Physics     Open Access   (Followers: 7)
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: 21)
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: 27)
Advances in OptoElectronics     Open Access   (Followers: 4)
Advances In Physics     Hybrid Journal   (Followers: 17)
Advances in Physics Theories and Applications     Open Access   (Followers: 13)
Advances in Physics: X     Open Access  
Advances in Remote Sensing     Open Access   (Followers: 31)
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: 9)
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: 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: 43)
Applied Physics A     Hybrid Journal   (Followers: 7)
Applied Physics Frontier     Open Access   (Followers: 1)
Applied Physics Letters     Hybrid Journal   (Followers: 33)
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: 33)
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: 62)
Astronomy and Astrophysics Review     Hybrid Journal   (Followers: 20)
Astrophysical Journal Supplement Series     Full-text available via subscription   (Followers: 5)
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: 43)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 16)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 30)
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   (Followers: 13)
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: 14)
Case Studies in Nondestructive Testing and Evaluation     Open Access   (Followers: 8)
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: 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  
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: 159)
Composites Part B : Engineering     Hybrid Journal   (Followers: 203)
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: 5)
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: 39)
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: 19)
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: 19)
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: 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: 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: 25)
Geografiska Annaler, Series A: Physical Geography     Hybrid Journal   (Followers: 3)
Geophysical Research Letters     Full-text available via subscription   (Followers: 96)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 128)
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: 59)
IET Optoelectronics     Hybrid Journal   (Followers: 1)
Il Colle di Galileo     Open Access  
Imaging Science Journal     Hybrid Journal   (Followers: 3)
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: 26)
Indian Journal of Radio & Space Physics (IJRSP)     Open Access   (Followers: 27)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 27)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 6)
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: 21)
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: 2)
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)

        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  [2336 journals]
  • Destructive effect of solar light on morphology of colloidal silver
    • Authors: Ali Akbar Ashkarran; Sahar Daemi; Maryam Derakhshi
      Pages: 577 - 585
      Abstract: Colloidal silver nanocubes (NCs) were successfully synthesized by reduction of silver nitrate with ethylene glycol and polyvinylpyrrolidon as capping agent. The effect of solar light irradiation on the formation and morphology of silver NCs was investigated. Moreover, altering the amount of sodium sulfide was used to control the morphology and shape of primary silver seeds. Scanning electron microscopy, transmitting electron microscopy, X-ray diffraction and UV-vis spectroscopy were used to characterize silver NCs. The samples prepared under the solar light irradiation do not possess cubic shape while highly monodispersed silver NCs were obtained in dark room conditions. For dark room synthesis, a decrease of the amount of Na2S by only 10 μL resulted in formation of mixture of silver nanospheres and nanowires in addition to NCs instead of the monodispersed silver NCs. However, similar increase of the amount of sodium sulfide results in distortion of cubic geometry of particles. The results suggest that solar light has a negative effect on the shape evolution of the primary silver seeds.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050021
      Issue No: Vol. 78, No. 5 (2016)
  • Sol–gel synthesis of silica containers using a corrosion inhibitor,
           catamine AB, as a templating agent
    • Authors: O. V. Dement’eva; L. V. Frolova; V. M. Rudoy; Yu. I. Kuznetsov
      Pages: 596 - 601
      Abstract: It has been shown that silica container particles containing a large amount (~1 g/g of SiO2) of a corrosion inhibitor, catamine AB, can be obtained, with the inhibitor being loaded at the stage of the sol–gel synthesis of the particles by using catamine micelles as a template. Being introduced into an H2S-containing aggressive aqueous medium, such containers protect rather efficiently carbon steel from hydrogen-sulfide corrosion and hydrogenation. The protection effect seems to be realized via not only the release (desorption) of catamine AB molecules from the containers, but also the adsorption of the products of gradual dissolution of silica matrix on the surface of metal being protected.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050057
      Issue No: Vol. 78, No. 5 (2016)
  • A study of the stability of aqueous suspensions of functionalized carbon
    • Authors: E. A. Zakharychev; M. A. Kabina; E. N. Razov; L. L. Semenycheva
      Pages: 602 - 607
      Abstract: The properties of aqueous suspensions of carbon nanotubes have been studied as depending on the conditions of their functionalization in a mixture of sulfuric and nitric acids. The elemental composition and contents of carboxyl, lactone, and hydroxyl groups in carbon nanotubes have been determined at different durations and temperatures of functionalization. The influence of functionalization conditions on the value of the electrokinetic potential of carbon nanotubes in aqueous suspensions and the nanotube solubility in water has been investigated. It has been found that the absolute value of the electrokinetic potential of nanotubes and their solubility in water increase with both the duration and temperature of functionalization due to a rise in the number of functional groups on their surface. The optimal regimes of functionalization of carbon nanotubes have been determined from the point of view of preserving their structure and stability in aqueous dispersions.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050240
      Issue No: Vol. 78, No. 5 (2016)
  • Sol–gel transition and rheological properties of silica nanoparticle
    • Authors: S. O. Ilyin; M. P. Arinina; A. Ya. Malkin; V. G. Kulichikhin
      Pages: 608 - 615
      Abstract: Possible variants of the rheological behavior of silica model dispersions have been analyzed. Different types of interaction between the particles and a dispersion medium make it possible to obtain different systems from low-viscosity sols to gels. Proton-donor (water) and aprotic (dimethyl sulfoxide) media have been used for comparison. Dispersions in the aprotic medium behave as non-Newtonian viscous fluids exhibiting shear thinning or shear thickening depending on deformation rate. Aqueous dispersions are viscoelastic and viscoplastic objects that exhibit the shear thickening at stresses higher than the yield stress. The introduction of small amounts of poly(ethylene oxide) into the organic dispersion medium initiates gelation. An increase in the polymer content in the dispersion medium above the concentration corresponding to the formation of a macromolecular network promotes an increase in stiffness and strength of the gels. The rheological behavior of gels is influenced by the polymer molecular mass and its affinity for a solvent.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050070
      Issue No: Vol. 78, No. 5 (2016)
  • Gas flow in a layer of chains formed from permeable clusters of
    • Authors: V. A. Kirsh
      Pages: 616 - 622
      Abstract: The Stokes–Brinkman flow field has been calculated in a model deposit, i.e., a row of parallel chains formed from porous spherical clusters of nanoparticles and oriented perpendicularly to the gas flow direction. The force of drag to an air flow has been calculated for the row of chains taking into account their permeability and the distance to neighboring chains. The drag forces have been found for nanodendrites composing clusters with allowance for the gas slip effect. Corresponding approximation formulas have been derived. A method has been proposed for calculating the pressure drop across a highly porous deposit of clusters of aerosol nanoparticles deposited onto a filter.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050082
      Issue No: Vol. 78, No. 5 (2016)
  • Dependence of the structure of ring-shaped deposits resulting from
           evaporation of dispersion droplets on initial contact angle
    • Authors: S. P. Molchanov; V. I. Roldughin; I. A. Chernova-Kharaeva; G. A. Yurasik
      Pages: 633 - 640
      Abstract: Experiments have been performed on the formation of ding-shaped deposits upon the evaporation of dispersion droplets on different substrates accompanied by the coffee ring effect. The main attention has been focused on studying the structure of a formed deposit as depending on the initial contact angle of a droplet. It has been established that the deposit structure may vary from ring-shaped to disc-shaped with a decrease in the contact angle. For certain systems, as the initial contact angle is varied, the scenario of droplet evaporation may change and, in some cases, acquire a combined character. Before the onset of pinning, menisci of droplets that are evaporated on modified polymer substrates may initially move not only toward the droplet center, but also in the opposite direction.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050094
      Issue No: Vol. 78, No. 5 (2016)
  • Molecular dynamics simulation of the structure of mixed ligand shells
           stabilizing cadmium selenide nanoparticle surfaces with different
    • Authors: A. V. Nevidimov; V. F. Razumov
      Pages: 641 - 646
      Abstract: A full-atomic molecular dynamics simulation has been performed for a ligand shell of colloidal cadmium selenide quantum dots. Trioctylphosphine, trioctylphosphine oxide, octadecylphosphonic acid, and hexadecylamine have been used as ligands. For a mixture of the two former ligands, the effect of surface curvature on the fraction of surface ions of quantum dots bonded to ligands has been studied. It has been shown that, for particles with radii of 1.9 and 4.5 nm, every second and approximately third cadmium atom, respectively, is bonded to trioctylphosphine oxide. Partial introduction of octadecylphosphonic acid and hexadecylamine may increase the fraction of bonded surface atoms by more than two times.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050112
      Issue No: Vol. 78, No. 5 (2016)
  • Premicellar aggregation in water–salt solutions of sodium alkyl
           sulfonates and dodecyl sulfate
    • Authors: E. A. Reshetnyak; O. S. Chernyshova; N. O. Mchedlov-Petrosyan
      Pages: 647 - 651
      Abstract: The features of premicellar aggregation in aqueous solutions of sodium n-octyl, n-nonyl, and n-decyl sulfonate, as well as sodium n-dodecyl sulfate, at a constant ionic strength maintained by adding NaCl are studied by potentiometry using modified ion-selective electrodes reversible with respect to the ions of these surfactants. For the studied surfactants, the critical micelle concentrations are refined, the compositions of the products of premicellar aggregation are determined, and the stability constants of aggregates are evaluated.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050124
      Issue No: Vol. 78, No. 5 (2016)
  • Nonequilibrium thermodynamics of transport processes on membrane surfaces
    • Authors: V. I. Roldughin; V. M. Zhdanov; T. V. Kharitonova
      Pages: 652 - 657
      Abstract: Nonequilibrium processes have been considered on interfaces between media, with one medium being a permeable membrane. The nonequilibrium processes have been described in terms of nonequilibrium thermodynamics combined with the Fokker−Planck kinetic equation. Phenomenological equations derived within the framework of the combined approach have been discussed. It has been shown that the formal use of linear equations of nonequilibrium thermodynamics may be, in some cases, reduced to nonlinear equations for heat and mass transfer through an interface. It has been noted that the asymmetry of transport characteristics of asymmetric membranes may be explained in terms of the derived relations.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050136
      Issue No: Vol. 78, No. 5 (2016)
  • Elastic properties of the (001) face of xenon crystals
    • Authors: Marco Rubbo; Marco Bruno
      Pages: 658 - 668
      Abstract: In this work we investigated the elastic properties of the (001) face of xenon crystal. The slabs (twodimensional crystals) defined by (001) planes are generated, their structures are optimized and the slabs thermodynamic functions in excess to the crystal bulk calculated. The calculations are based on the Lennard-Jones 6−12 force field, classical elasticity theory and surface thermodynamics. In this work, the number of planes undergoing relaxation is not a priori constrained but it follows from the minimization of the free energy of the slabs and of the bulk, in respect to atomic positions. The value of the surface free energy is calculated as a function of the homogeneous strain of the 2D (001) cell measured relatively to the cell of the stable 3D crystal. At 0 K, when strain is not applied, the specific surface free energy is about 0.064 Jm-2 and decreases by about 6% at 50 K. The surface stress is positive amounting to 0.010 Jm-2 at 0 K, and it decreases by about 50% at 50 K. We find that the surface stress can be released by a reorganization of the interatomic distances at the crystal surfaces. The surface excess mean value of the slab elastic constants at 0 K is small (0.012 GPa) and it decreases by about 35% at 50 K. The method proposed can be alternative to molecular dynamics simulations in order to assess the excess surface properties of materials having a complex structure.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050148
      Issue No: Vol. 78, No. 5 (2016)
  • Refining the ionic surfactant micellization theory based on the law of
           mass action
    • Authors: A. I. Rusanov
      Pages: 669 - 673
      Abstract: The micellization theory previously elaborated based on the determination of critical micelle concentration using the constant of the law of mass action is refined for ionic surfactants. The degree of micellization is used as a parameter to obtain implicit dependences of monomer and micelle concentrations on overall surfactant concentration in an ideal micellar solution. As expected, the counterion concentration increases monotonically, while the surface-active ion concentration passes through a maximum immediately after the critical micelle concentration. Repeated calculations performed at different degrees of counterion binding show that, as this parameter is decreased, the maximum becomes sharper, disappearing when the parameter becomes equal to unity. The complex character of the exact analytical description of the concentration functions for monomers and micelles is in contrast to their simple graphical representations. This fact makes it possible to derive simple analytical approximations for them in the form of explicit functions useful for calculations.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x1605015x
      Issue No: Vol. 78, No. 5 (2016)
  • Synthesis and properties of Cu–Pd hydrosol: Hydrogen reduction of Cu 2+
           ions catalyzed by palladium nanoparticles
    • Authors: R. D. Solovov; E. V. Abkhalimov; B. G. Ershov
      Pages: 685 - 689
      Abstract: A method has been developed for obtaining Cu–Pd hydrosols via catalytic reduction of copper ions by hydrogen on seed palladium nanoparticles 2.5 ± 0.3 nm in size. It has been found that reduction of Cu2+ to metal proceeds stage-by-stage through the formation of an intermediate Cu+ ion. Cu–Pd hydrosol remains stable with respect to sedimentation and aggregation for several weeks. The hydrodynamic size of Cu–Pd nanoparticles increases proportionally to the copper content in particles. It has been shown that this is due to an acidification of the solution as a result of H+ ions formation via the reaction of reduction of Cu2+ ions by hydrogen.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050197
      Issue No: Vol. 78, No. 5 (2016)
  • Effect of salts on synthesis of mesoporous materials with mixed cationic
           and anionic surfactants as templates
    • Authors: Hong-ni Teng; Teng Shen; Yi-xiao Hou; Yong Chen; Xiao-yan Kou; Xiu-yun Wang; Man Hai
      Pages: 690 - 697
      Abstract: Mesoporous silica materials were synthesized using tetraеthoxysilane as precursor and liquid crystals formed in aqueous mixtures of cetyl trimethyl ammonium bromide (CTAB) and sodium dodecyl sulfate (SDS) as templates, without and with the addition of NaBr or Na2SO4. For this purpose, the formation of liquid crystals as a function of the ratio of CTAB and SDS under different conditions was studied. It was found that liquid crystals formed in the mixed system of CTAB and SDS at certain mixing ratios are well-structured templates for the synthesis of mesoporous silicas. The synthesized silica materials were characterized by transmission electron microscope and nitrogen adsorption/desorption analysis. The pore size of mesoporous silicas could be controlled between 3 to 6 nm by simply changing the concentration of NaBr in solution. The mesoporous silicas exhibited lamellar structure and the order of structural arrangement was promoted with addition of NaBr. However, addition of Na2SO4 led to ink-bottle type pores of mesoporous silica with a narrow pore size distribution of around 2 nm and a higher specific surface area of 610 m2 g–1.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050203
      Issue No: Vol. 78, No. 5 (2016)
  • Electrical percolation in micellar sodium dodecyl sulfate solutions. a
           phenomenological consideration
    • Authors: O. G. Us’yarov; T. G. Movchan
      Pages: 705 - 711
      Abstract: Effects of electrical percolation accompanying variations in overall surfactant concentration с have been studied by the example of micellar sodium dodecyl sulfate solutions. It has been found that, in the studied concentration range of 0.001–1.2 M, dependences of electrical conductivity K on c may exhibit at least three break points, with the dK/dc derivatives changing in the vicinities of these points. At two of these points, which are reliably identified and correspond to critical micelle concentrations (CMC1 and CMC2), they decrease. At the third concentration, lying between CMC1 and CMC2, the dK/dc derivative increases. A substantiated assumption has been put forward that this break point, at which the dK/dc derivative increases, results from the clustering of micelles and the appearance of channels with a higher specific conductivity, which is provided by the contribution from the electrical conductivity of the diffuse and dense parts of micelle electrical double layers, upon the formation of clusters. The ionic surfactant concentration that corresponds to the break point at which the dK/dc value increases has been denoted as the critical percolation concentration.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050239
      Issue No: Vol. 78, No. 5 (2016)
  • Features of colloidal disperse structure formation in petroleum bitumen
    • Authors: I. N. Frolov; T. N. Yusupova; M. A. Ziganshin; E. S. Okhotnikova; A. A. Firsin
      Pages: 712 - 716
      Abstract: Temperature-modulated differential scanning calorimetry has been employed to analyze the structure-related thermal properties of petroleum bitumen. This method enables one to distinguish between “order–disorder” and glass transitions, thereby making it possible to monitor and identify structure-related phase transformations, the signals from which are invisible or overlapped in the thermograms of conventional differential scanning calorimetry. Bitumen has been shown to be a colloidal disperse system only under certain temperature–time conditions. Its dispersed phase may be represented by aggregates of two types with colloidal sizes. Saturated hydrocarbons form a solid crystalline phase in accordance with the regularities of first-order structural phase transitions and nucleation mechanism of phase separation. Asphaltenes and resins form a solid amorphous phase for a relatively long time as a result of a structural relaxation glass transition by the spinodal mechanism of phase separation.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050069
      Issue No: Vol. 78, No. 5 (2016)
  • Filtration of nanoaerosols through porous materials with allowance for
           desorption processes
    • Authors: A. L. Chernyakov
      Pages: 717 - 721
      Abstract: The effects of finite residence time of aerosol particles in a bound state and their detachment due to thermal fluctuations on the filtration efficiency of porous and fibrous filters have been studied. It has been shown that, when desorption processes are taken into account, nanoparticle filtration efficiency decreases with time already at times that are short compared with the residence time of particles in the bound state.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050033
      Issue No: Vol. 78, No. 5 (2016)
  • Calculation of vapor mass flux upon isothermal condensation on spherical
           droplets in a wide range of Knudsen numbers based on the solution of the
           Boltzmann kinetic equation
    • Authors: I. N. Shishkova; A. K. Yastrebov
      Pages: 722 - 729
      Abstract: Vapor mass flux density has been calculated on the surface of spherical droplets under almost isothermal conditions. The calculations have been performed at droplet radii corresponding to the free-molecular, intermediate, and continuum flow regimes. The study has been performed by the direct numerical solution of the Boltzmann kinetic equation. The method of characteristics has been adapted for describing transfer processes in spherically symmetric systems. The applicability of different simplified approaches to the calculation of mass flux density on droplet surface has been estimated.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050173
      Issue No: Vol. 78, No. 5 (2016)
  • Preparation of fullerene С 60 dispersions in water
    • Authors: V. N. Tseluikin
      Pages: 730 - 732
      Abstract: Stable colloidal dispersions of fullerene С60 in water free of organic solvents have been obtained. The addition of a С60 solution to a water–acetone mixture has been shown to cause a solvatochromic effect.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050215
      Issue No: Vol. 78, No. 5 (2016)
  • Activity coefficients in an ionic micellar system
    • Authors: A. I. Rusanov
      Pages: 733 - 734
      Abstract: The average activity coefficients of ionic surfactants as a whole and their monomeric forms are compared. The concept of an aggregative activity coefficient is introduced.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061933x16050161
      Issue No: Vol. 78, No. 5 (2016)
  • Small-angle X-ray scattering in sodium dodecyl sulfate solutions and
           micelle clustering
    • Abstract: The small-angle X-ray scattering (SAXS) in micellar sodium dodecyl sulfate solutions has been studied in the range of overall concentrations c from 8 mM (CMC1) to 300 mM and the absolute values of scattering vector q from 0.07 to 3.0 nm–1. The total intensity of isotropic scattering has been revealed to increase with solution concentration. At c > 27 mM, the SAXS spectra have been found to exhibit an interference peak, which testifies a correlation in the arrangement of micelles in the bulk solution. This peak corresponds to the magnitude of q close to 1.55 nm–1. Using the position of this maximum, average distance r 0 between the centers of micelles has been determined, which is equal to 4.1 nm and remains almost unchanged upon an increase in the overall concentration of sodium dodecyl sulfate. The observed regularities have been explained in terms of the DLVO theory taking into account the electrostatic and molecular intermicellar interaction.
      PubDate: 2016-09-01
      DOI: 10.1134/S1061933X16050227
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