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  Subjects -> PHYSICS (Total: 800 journals)
    - ELECTRICITY AND MAGNETISM (9 journals)
    - MECHANICS (21 journals)
    - NUCLEAR PHYSICS (49 journals)
    - OPTICS (86 journals)
    - PHYSICS (578 journals)
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PHYSICS (578 journals)                  1 2 3 | Last

Showing 1 - 200 of 741 Journals sorted alphabetically
Acta Acustica united with Acustica     Full-text available via subscription   (Followers: 6)
Acta Mechanica     Hybrid Journal   (Followers: 18)
Acta Scientifica Naturalis     Open Access   (Followers: 2)
Advanced Composite Materials     Hybrid Journal   (Followers: 64)
Advanced Functional Materials     Hybrid Journal   (Followers: 48)
Advanced Materials     Hybrid Journal   (Followers: 246)
Advanced Science Focus     Free   (Followers: 3)
Advanced Structural and Chemical Imaging     Open Access   (Followers: 2)
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: 20)
Advances in Imaging and Electron Physics     Full-text available via subscription   (Followers: 2)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 18)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 28)
Advances in OptoElectronics     Open Access   (Followers: 5)
Advances In Physics     Hybrid Journal   (Followers: 18)
Advances in Physics : X     Open Access  
Advances in Physics Theories and Applications     Open Access   (Followers: 12)
Advances in Remote Sensing     Open Access   (Followers: 35)
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: 10)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 4)
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: 46)
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: 3)
Applied Physics Reviews     Hybrid Journal   (Followers: 9)
Applied Radiation and Isotopes     Hybrid Journal   (Followers: 7)
Applied Spectroscopy     Full-text available via subscription   (Followers: 22)
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: 7)
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: 16)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 31)
Biophysical Reviews     Hybrid Journal  
Biophysical Reviews and Letters     Hybrid Journal   (Followers: 3)
BMC Biophysics     Open Access   (Followers: 5)
Boson Journal of Modern Physics     Open Access   (Followers: 12)
Brazilian Journal of Physics     Hybrid Journal  
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 10)
Bulletin of Materials Science     Open Access   (Followers: 41)
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  
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: 9)
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: 176)
Composites Part B : Engineering     Hybrid Journal   (Followers: 222)
Computational Astrophysics and Cosmology     Open Access  
Computational Condensed Matter     Open Access  
Computational Materials Science     Hybrid Journal   (Followers: 21)
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: 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: 6)
Contributions to Plasma Physics     Hybrid Journal   (Followers: 3)
COSPAR Colloquia Series     Full-text available via subscription   (Followers: 7)
Cryogenics     Hybrid Journal   (Followers: 46)
Current Applied Physics     Full-text available via subscription   (Followers: 4)
Current Science     Open Access   (Followers: 48)
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     Hybrid Journal   (Followers: 4)
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: 40)
Energy Procedia     Open Access   (Followers: 2)
Engineering Failure Analysis     Hybrid Journal   (Followers: 64)
Engineering Fracture Mechanics     Hybrid Journal   (Followers: 22)
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: 19)
European Journal of Physics Education     Open Access   (Followers: 3)
European Physical Journal - Applied Physics     Full-text available via subscription   (Followers: 16)
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: 13)
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: 26)
Geografiska Annaler, Series A : Physical Geography     Hybrid Journal   (Followers: 3)
Geophysical Research Letters     Full-text available via subscription   (Followers: 104)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 127)
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: 6)
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: 2)
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: 20)
IEEE Signal Processing Magazine     Full-text available via subscription   (Followers: 63)
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: 35)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 33)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 7)
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: 22)
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: 4)
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: 3)
International Journal of Abrasive Technology     Hybrid Journal   (Followers: 2)
International Journal of Aeroacoustics     Hybrid Journal   (Followers: 31)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 4)
International Journal of Astronomy and Astrophysics     Open Access   (Followers: 22)
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: 33)
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: 33)
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: 18)
International Journal of Material Forming     Hybrid Journal   (Followers: 1)
International Journal of Materials and Product Technology     Hybrid Journal   (Followers: 5)

        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  [2329 journals]
  • Synthesis of hydrated tungsten(VI) oxide sols by peptization
    • Authors: A. V. Aleksandrov; N. N. Gavrilova; V. V. Nazarov
      Pages: 173 - 180
      Abstract: Abstract A method has been developed for the synthesis of hydrated tungsten oxide hydrosols, with this method being based on potassium tungstate hydrolysis followed by peptization of the formed precipitate. The influence of the conditions of precipitation, aging, and washing of the precipitate on the particle phase composition and shape and the degree of precipitate peptization has been studied. Hydrosol-particle sizes have been determined by different methods. It has been found that the dispersed phase of the hydrosols consists mainly of platelike particles of hydrated tungsten oxide WO3 · 2H2O with a number-average size of 52 nm. The sols are stable to aggregation in a pH range of 3.0–4.5. The zeta potential of the particles ranges from–33 to–38 mV.
      PubDate: 2017-03-01
      DOI: 10.1134/s1061933x17020028
      Issue No: Vol. 79, No. 2 (2017)
       
  • All-atom molecular dynamics analysis of kinetic and structural properties
           of ionic micellar solutions
    • Authors: N. A. Volkov; N. V. Tuzov; A. K. Shchekin
      Pages: 181 - 189
      Abstract: Abstract All-atom molecular dynamics simulation results regarding aqueous sodium dodecyl sulfate (SDS) solutions have been presented. Both salt-free solutions with different SDS concentrations and those containing calcium chloride additives have been studied. The simulation has shown that surface-active SDS ions form stable premicellar aggregates. The obtained molecular dynamics trajectories have been used to describe both the kinetic and structural properties of solutions containing SDS molecular aggregates and the properties of individual aggregates. Aggregation kinetics has been investigated, and the characteristic sizes of the aggregates have been calculated by different methods. It has been found that the size of a premicellar aggregate with aggregation number n = 16 in a salt-free solution virtually does not depend on surfactant concentration. Radial distribution functions (RDFs) of hydrogen and oxygen atoms of water molecules relative to the center of mass of an aggregate have no local maxima near the aggregate surface; i.e., the surface is incompletely wetted with water. Corresponding RDFs of carbon atoms have one, two or three maxima depending on the surfactant concentration and the serial number of a carbon atom in the hydrocarbon radical of the surface- active ion. The study of the potentials of mean force for the interaction of sodium and calcium ions with an aggregate having aggregation number n = 32 shows that only calcium ions can be strongly bound to such an aggregate.
      PubDate: 2017-03-01
      DOI: 10.1134/s1061933x17020156
      Issue No: Vol. 79, No. 2 (2017)
       
  • Effect of temperature on ring-shaped-deposit formated at evaporation of
           droplets of silver-nanoparticle dispersions
    • Authors: V. V. Vysotskii; V. I. Roldughin; O. Ya. Uryupina; I. N. Senchikhin; A. V. Zaitseva
      Pages: 190 - 197
      Abstract: Abstract The effect of temperature is studied on the geometric parameters and conductivity of ring-shaped deposits formed at evaporation of droplets of dispersions of silver nanoparticles on hydrophilic (glass) and hydrophobic (copper) substrates. It has been shown that increasing temperature leads to substantial changes in the deposit profile. Therewith, the effects of temperature on droplet evaporation on glass and copper substrates are different. It has been found that the lateral conductivity of a ring-shaped deposit formed on a glass substrate increases stepwise similarly to a percolation transition at a droplet-evaporation temperature of 58°C. It has been suggested that the reason for the temperature effect is related to a change in the ratio between the rates of physicochemical processes occurring at different stages of droplet evaporation.
      PubDate: 2017-03-01
      DOI: 10.1134/s1061933x17020168
      Issue No: Vol. 79, No. 2 (2017)
       
  • Preparation of pickering-emulsion-based capsules with shells composed of
           titanium dioxide nanoparticles and polyelectrolyte layers
    • Authors: P. A. Demina; D. O. Grigoriev; G. M. Kuz’micheva; T. V. Bukreeva
      Pages: 198 - 203
      Abstract: Abstract A procedure has been proposed for the preparation of capsules with shells composed of titanium dioxide nanoparticles and polymers via the formation of Pickering emulsions (colloidosomes) followed by layer-by-layer deposition of polyelectrolytes. The feasibility of stabilizing oil droplets of emulsions by spontaneous adsorption of partly hydrophobized nanoparticles of anatase-form titanium dioxide at the oil/water interface has been studied. Conditions have been determined for the formation of stable colloidosomes and the subsequent layer-by-layer deposition of oppositely charged polyelectrolytes onto their surfaces. It has been shown that hydrophobic dyes may be encapsulated using the procedure developed for the preparation of the capsules. The photocatalytic activity of TiO2 particles occurring in the shell has been demonstrated by the example of degradation of Nile red which is incorporated in the oil core of a capsule.
      PubDate: 2017-03-01
      DOI: 10.1134/s1061933x1702003x
      Issue No: Vol. 79, No. 2 (2017)
       
  • The dielectric properties and flow of electrorheological fluids based on
           polymer-coated nanodispersed barium tetraacetate titanyl particles upon a
           dynamic shear in electric fields
    • Authors: K. V. Ivanov; O. S. Ivanova; A. V. Agafonov; S. A. Kozyukhin
      Pages: 204 - 211
      Abstract: Abstract The shear stress in flowing electrorheological fluids consisting of PMS-20 poly(dimethylsiloxane) filled with nanodispersed barium tetraacetate titanyl particles coated with polymers (polyethyleneimine, poly(ethylene glycol), and polyethyloxazoline) has been studied as depending on the strengths of direct- and alternating-current (f = 50 Hz) electric fields. Results of analyzing the dielectric spectra of electrorheological fluids in a frequency range of 25–106 Hz have been presented. The values of the shear stress in the flowing fluids as depending on the nature of a polymer adsorbed on the particle surface decrease in a series corresponding to a reduction in the Maxwell–Wagner relaxation times of the suspensions. The current-voltage characteristics of the electrorheological fluids at high voltages (up to 5 kV) indicate the realization of the mechanism of currents limited by the space charge. The influence of an adsorbed polymer on the magnitude of the electrorheological effect is reduced to blocking polar groups on the particle surface and variations in the conductivity, effective dielectric permittivity, and loss tangents of filler materials. An increase in the contribution from these factors leads to a gradual decrease in the magnitude of the electrorheological effect.
      PubDate: 2017-03-01
      DOI: 10.1134/s1061933x17020041
      Issue No: Vol. 79, No. 2 (2017)
       
  • Comparative study of Cr(III) adsorption by carbon nanotubes and active
           carbons
    • Authors: M. V. Manilo; Z. Z. Choma; S. Barany
      Pages: 212 - 218
      Abstract: Abstract The adsorption of trivalent chromium ions from aqueous solutions on the surface of carbon materials, namely, multiwall carbon nanotubes (NTs) and two samples of active carbon, is studied depending on pH and adsorbate concentration in the system. Isotherms of Cr(III) adsorption by the aforementioned materials are obtained. It is shown that chromium ions are predominantly bound by surface carboxyl groups. The adsorption of chromium ions reduces the electrokinetic potential of NTs and, at chromium concentrations C Cr(III) > 10–5 M, leads to the reversal of the surface charge. The adsorption value decreases in the series NT > Merck carbon > Norit carbon, in contrast to an increase in the adsorbate affinity to the adsorbent in this series, as determined from the slope of the initial section of the Langmuir isotherms. Small amounts of chromium ions sorbed at low concentrations in solution (C Cr(III) ≤ 10–5 M) are comparable with the concentration of hydrogen ions displaced from the surface, thus making it possible to suppose the existence of an ionexchange adsorption mechanism. As the concentration of Cr(III) increases, the equivalent displacement of H+ is violated, thereby indicating the development of other adsorption mechanisms (complexation).
      PubDate: 2017-03-01
      DOI: 10.1134/s1061933x17020053
      Issue No: Vol. 79, No. 2 (2017)
       
  • Kinetic peculiarities of Quillaja Saponaria Molina saponin sorption by
           chitosan
    • Authors: N. V. Mironenko; S. O. Smuseva; T. A. Brezhneva; V. F. Selemenev; L. S. Nechaeva; E. V. Butyrskaya
      Pages: 219 - 225
      Abstract: Abstract A relationship between adsorption layer structure at different stages of sorbent filling, hydrophilicity, and spatial orientation of saponin in chitosan phase is revealed by joint analysis of the kinetic curves of saponin sorption, IR spectra of chitosan and saponin samples, and computer-simulation data. The sorbent–sorbate complex is formed due to electrostatic interactions between protonated amino groups in chitosan and carboanions of glucuronic acid in saponin, as well as hydrogen bonding between NH2 and OH groups in chitosan molecules and OH groups in the carbohydrate moiety of saponin molecules.
      PubDate: 2017-03-01
      DOI: 10.1134/s1061933x17020077
      Issue No: Vol. 79, No. 2 (2017)
       
  • Stability of nanocrystalline cellulose in aqueous KCl solutions
    • Authors: V. I. Mikhailov; M. A. Torlopov; I. S. Martakov; P. V. Krivoshapkin
      Pages: 226 - 233
      Abstract: Abstract The electrokinetic properties and aggregation stability of nanocrystalline cellulose sols in aqueous KCl solutions have been studied at pH 5.2. Cellulose nanoparticles have been prepared via controlled degradation in a mixture of phosphotungstic and acetic acids. At electrolyte concentrations of <0.01 mol/dm3, the system is stable to aggregation. The experimentally determined threshold of fast coagulation is 0.08 mol/dm3. It has been noted that the structural component of disjoining pressure must be taken into account when considering the aggregation stability of nanocrystalline cellulose sols in terms of the DLVO theory. It has been shown that the sizes of water boundary layers decrease with an increase in the KCl concentration. The effect of medium pH on the electrokinetic potentials and sizes of aggregates has been studied.
      PubDate: 2017-03-01
      DOI: 10.1134/s1061933x17020065
      Issue No: Vol. 79, No. 2 (2017)
       
  • Mechanisms of pinning accompanying evaporation of colloidal dispersion
           droplets
    • Authors: S. P. Molchanov; V. I. Roldughin; I. A. Chernova-Kharaeva; G. A. Yurasik
      Pages: 234 - 243
      Abstract: Abstract Experiments have been performed to clarify the mechanism of pinning, i.e., the phenomenon of fixing menisci of evaporating dispersion droplets, related to the formation of ring-shaped deposits (coffee ring effect). The influence of particle concentration in dispersions and the degree of hydrophilicity (hydrophobicity) of substrates on pinning has been studied. It has been shown that there are three main mechanisms of pinning, with the first one being due to the hysteresis of droplet contact angle, the second mechanism resulting from the adhesion of particles to substrates, and the third one being caused by the formation of a dense adsorption layer on a substrate. A relation has been revealed between the pinning mechanism that occurs and the degree of substrate hydrophilicity.
      PubDate: 2017-03-01
      DOI: 10.1134/s1061933x17020089
      Issue No: Vol. 79, No. 2 (2017)
       
  • The effect of modification on the physicochemical characteristics of
           shungite
    • Authors: I. A. Polunina; V. V. Vysotskii; I. N. Senchikhin; K. E. Polunin; I. S. Goncharova; G. A. Petukhova; A. K. Buryak
      Pages: 244 - 249
      Abstract: Abstract The influence of thermo- and mechanochemical modification of mineral shungite-III (Karelia, Russia) on its chemical composition and physicochemical properties has been studied. A method has been proposed for the mechanochemical modification of shungite, which yields a finely dispersed sorbent with a specific surface area of 70.6 m2/g, a total pore volume of 0.336 cm3/g, and a carbon concentration of higher than 75%. The comparative analysis of the thermolysis of the mineral and modified shungites in air has revealed a difference between the thermal stabilities of the samples. Almost all of the carbon of modified finely dispersed shungite combusts below 500°C, whereas the decomposition of mineral shungite starts above 600°C and only 60% of carbon combusts at 800°C.
      PubDate: 2017-03-01
      DOI: 10.1134/s1061933x17020107
      Issue No: Vol. 79, No. 2 (2017)
       
  • Soft ionization mass spectrometry for studying desorption of bioactive
           compounds from a shungite surface
    • Authors: K. E. Polunin; I. S. Goncharova; A. V. Ul’yanov; I. A. Polunina; A. K. Buryak
      Pages: 250 - 257
      Abstract: Abstract Ionized products of desorption of biologically active amino compounds (1,1-dimethylhydrazine, diglycine, tyrosine, and tryptophan) from the surface of a modified mineral (shungite-III, Karelia) have been investigated by laser desorption/ionization mass spectrometry methods (MALDI and SALDI). The composition of the ionized products of laser desorption of amino acids from the surface of nanodispersed shungite is almost independent of carbon content in shungite. The comparative analysis of ionized organic compounds desorbed from the surfaces of shungite and carbon black has led to the suggestion that the decomposition and surface transformation of 1,1-dimethylhydrazine molecules mainly occur on the inorganic components of shungite.
      PubDate: 2017-03-01
      DOI: 10.1134/s1061933x17020090
      Issue No: Vol. 79, No. 2 (2017)
       
  • The effect of silver ions electrolytically introduced into colloidal
           nanodiamond solution on its viscosity and thermal conductivity
    • Authors: A. P. Puzir’; A. V. Minakov; A. E. Burov; S. M. Zharkov; N. G. Maksimov; M. I. Pryazhnikov
      Pages: 258 - 263
      Abstract: Abstract Experimental data have been presented on the influence of silver on the viscosity and thermal conductivity of a dispersion of diamond nanoparticles. A stable dispersion (5 wt %) of detonation nanodiamond particles has been used in the experiments. Silver ions have been introduced electrolytically into the dispersion of diamond nanoparticles. Silver concentration was not higher than 0.05 wt %. It has been shown that the introduction of silver ions significantly affects the thermal conductivity and viscosity of the dispersion.
      PubDate: 2017-03-01
      DOI: 10.1134/s1061933x17020119
      Issue No: Vol. 79, No. 2 (2017)
       
  • Orientational Brownian motion in a viscoelastic medium
    • Authors: V. V. Rusakov; Yu. L. Raikher
      Pages: 264 - 269
      Abstract: Abstract A model has been proposed for the complete (2D) orientational Brownian motion of axially symmetric particles in a Kelvin viscoelastic medium. It has been shown that the elastic response of the carrier medium can be correctly determined by introducing an additional variable, the moment elastic forces, which, together with the particle-orientation vector, composes the complete set of phase variables of a system. A set of stochastic equations (Langevin equations) has been derived for these values. This set has been employed to construct, under the effective field approximation, a simple set of moment equations describing the magnetization dynamics of a ferrogel, i.e., a dispersion of single-domain nanoparticles in a gel matrix. The theoretical results qualitatively agree with the data of magnetic microrheology of gelatin-based ferrogels.
      PubDate: 2017-03-01
      DOI: 10.1134/s1061933x17020120
      Issue No: Vol. 79, No. 2 (2017)
       
  • Sorption of uranium(VI) compounds on fibrous anion exchanger surface from
           aqueous solutions
    • Authors: V. F. Sazonova; O. V. Perlova; N. A. Perlova; A. P. Polikarpov
      Pages: 270 - 277
      Abstract: Abstract The effect of sorbent consumption and the kinetics and mechanism of sorption of uranium(VI) compounds on the surface of FIBAN A-6 fibrous anion exchanger from aqueous uranyl acetate solutions have been studied in the presence of sulfuric acid or sodium hydrocarbonate. The degree of sorption of uranium(VI) compounds by FIBAN A-6 anion exchanger has been found to be as high 97.0–99.5% at an interfacial contact time of 3–7 min and a sorbent consumption of 2–5 g/dm3. Diffusion and chemical kinetics models have been employed to show that the sorption kinetics of uranyl sulfate and carbonate complexes corresponds to the mixed diffusion mechanism and is described by a pseudo-second-order equation. The sorption isotherms of uranium(VI) compounds have the pattern of L-type isotherms according to the Giles classification and are satisfactorily described by the Langmuir, Freundlich, and Dubinin–Radushkevich equations. It has been found that, within 40 min, the sorbent may be regenerated by 65–82% with a 1 M NaHCO3 solution.
      PubDate: 2017-03-01
      DOI: 10.1134/s1061933x17020132
      Issue No: Vol. 79, No. 2 (2017)
       
  • Phase separation of polymer solutions on a solvent surface
    • Authors: A. V. Semakov; V. G. Kulichikhin; A. Ya. Malkin
      Pages: 278 - 285
      Abstract: Abstract Study of the dynamics of liquid droplets of dilute and semidilute polymer solutions on the surfaces of liquid subphases representing solvents for corresponding polymers has shown that a spot of a rather stable layer is formed on an air–liquid interface. The spot spreads over a liquid subphase surface to yield a monomolecular polymer layer. At the same time, the solvent passes into the solution, so that the polymer or its concentrated solution remains on the subphase surface. The polymer does not dissolve in the bulk subphase for several hours. The stability of the polymer spot has been explained under the assumption that the interfacial surface possesses elastic properties and hinders the penetration of macromolecules into the bulk subphase. Desolvation of macromolecules followed by phase separation occurs on the surface. The initial rate of the phase separation of the solution is rather high, while the time dependence of the diameter of the spreading spot is described by a scaling law with an exponent almost equal to 2/3.
      PubDate: 2017-03-01
      DOI: 10.1134/s1061933x17020144
      Issue No: Vol. 79, No. 2 (2017)
       
  • Adsorption of anionic surfactant on porous and non-porous polyethylene
           terephthalate films
    • Authors: Yu. Yamauchi; P. Yu. Apel
      Pages: 286 - 294
      Abstract: Abstract We study the adsorption of anionic surfactant, sodium dodecyl diphenyloxide disulfonate (SDDD) on three types of polyethylene terephthalate substrates from aqueous solutions of SDDD of different concentrations. Neutral electrolyte (KCl) was added to the solutions to vary the ionic strength. The three types of substrates were: (1) original polymer film, (2) etched non-porous film, which was obtained from pristine film by chemical etching and bears negative charge on the surface, (3) etched porous membranes, which were fabricated from pristine film by ion irradiation and subsequent chemical etching. The membranes have negative charge on the flat surface and on the inner pore walls. The comparison of original and etched nonporous films shows that the negative charge on the flat surface has weak effect on adsorption of the anionic surfactant. The comparison of etched non-porous and porous films shows that the SDDD adsorption on the inner walls of pores is much weaker than on flat surface—even in case the pore radius is significantly larger than the Debye length. This “exclusion” effect strongly depends on ionic strength of solution. For the porous films, the effect of the pore size and shape on the anionic surfactant adsorption is presented and discussed.
      PubDate: 2017-03-01
      DOI: 10.1134/s1061933x1702017x
      Issue No: Vol. 79, No. 2 (2017)
       
  • Metal nanoparticles on polymer surfaces. 7. The growth kinetics of gold
           nanoparticles embedded into surface layers of glassy polymers
    • Authors: O. V. Dement’eva; M. E. Kartseva; V. A. Ogarev; V. M. Sukhov; V. M. Rudoy
      Pages: 42 - 49
      Abstract: Abstract It has been shown that citrate gold nanoparticles can be embedded (partly immersed) into the surface layers of different glassy polymers with subsequent seeded growth of the particles in an aqueous chloroauric acid–hydroxylamine mixed solution. Quantitative data have been obtained on the seeded growth kinetics, and it has been shown that its rate-limiting stage is the diffusion of metal ions from the bulk solution to the surface of gold nanoparticles.
      PubDate: 2017-01-01
      DOI: 10.1134/s1061933x1606003x
      Issue No: Vol. 79, No. 1 (2017)
       
  • Nucleation of silica Stöber particles in the presence of
           methacryloxypropyltrimethoxysilane
    • Authors: D. A. Eurov; D. A. Kirilenko; D. A. Kurdyukov
      Pages: 56 - 60
      Abstract: Abstract The effect of 3-methacryloxypropyltrimethoxysilane (MPTMOS) on the nucleation of silica particles synthesized in a water−ethanol−ammonia−tetraethoxysilane (TEOS) mixture by the Stöber−Fink−Bohn method has been studied. It has been shown, using atomic force microscopy, that, as the content of MPTMOS in a TEOS + MPTMOS precursor mixture is increased from 0 to 12.5 mol %, the final silica particle size decreases from 470 to 10 nm, because the number of nucleation centers increases by several orders of magnitude. In contrast to TEOS, hydrolysis of MPTMOS yields a smaller amount of deprotonated orthosilicic acid monomers, the condensation of which is hindered by electrostatic repulsion. The polycondensation of electrically neutral products of MPTMOS hydrolysis gives rise to a larger number of nucleation centers in the reaction mixture.
      PubDate: 2017-01-01
      DOI: 10.1134/s1061933x17010045
      Issue No: Vol. 79, No. 1 (2017)
       
  • Molecular dynamics study of micellization thermodynamics in AOT/hexane
           system
    • Authors: S. A. Kislenko; V. F. Razumov
      Pages: 76 - 80
      Abstract: Abstract The thermodynamics of reverse micelle formation from an ionic surfactant, sodium bis(2-ethylhexyl) sulfosuccinate (Aerosol OT, AOT), in hexane is studied by molecular dynamics simulation. A change in the Gibbs free energy upon the addition of one AOT molecule to a reverse micelle is calculated as depending on aggregation number N by the thermodynamic integration method. This dependence has a minimum at N ≈ 20 and maximum at N ≈ 35 and predetermines the monotonically decreasing character of the standard chemical potential of AOT in a micelle with the increase of the aggregation number. The simulation results predict the formation of reverse AOT micelles with an average aggregation number of ≈30, which is in good agreement with experimental data.
      PubDate: 2017-01-01
      DOI: 10.1134/s1061933x17010094
      Issue No: Vol. 79, No. 1 (2017)
       
  • Effect of alkylpyridinium chlorides on aggregation stability of aqueous
           dispersions of detonation nanodiamonds
    • Authors: O. A. Soboleva; G. A. Khamenov; V. Yu. Dolmatov; V. G. Sergeyev
      Pages: 126 - 132
      Abstract: Abstract Adsorption of decyl-, dodecyl-, and hexadecylpyridinium chlorides (DePC, DoPC, and CPC, respectively) from aqueous solutions on the surface of detonation nanodiamonds (NDs) and its effect on the aggregation stability of ND hydrosols are studied. Hydrophobic interactions, which are enhanced with the length of hydrocarbon chains in surfactant molecules, are found to play the main role in surfactant adsorption on the ND surface. DePC is almost not adsorbed on NDs, and its addition has no effect on both the size and ζ potential of nanoparticles. Adsorption of DoPC decreases the ζ potential of ND particles, thus causing their coagulation. Superequivalent adsorption of CPC results in sign reversal of the ζ potential of ND particles, thereby leading to alternation of the zones of aggregation stability and coagulation of the hydrosols with a rise in the concentration of this surfactant.
      PubDate: 2017-01-01
      DOI: 10.1134/s1061933x17010124
      Issue No: Vol. 79, No. 1 (2017)
       
 
 
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