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  Subjects -> PHYSICS (Total: 780 journals)
    - ELECTRICITY AND MAGNETISM (9 journals)
    - MECHANICS (19 journals)
    - NUCLEAR PHYSICS (48 journals)
    - OPTICS (90 journals)
    - PHYSICS (565 journals)
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    - THERMODYNAMICS (29 journals)

PHYSICS (565 journals)                  1 2 3 4 5 6 | Last

Acta Acustica united with Acustica     Full-text available via subscription   (Followers: 7)
Acta Mechanica     Hybrid Journal   (Followers: 16)
Advanced Composite Materials     Hybrid Journal   (Followers: 51)
Advanced Functional Materials     Hybrid Journal   (Followers: 41)
Advanced Materials     Hybrid Journal   (Followers: 227)
Advanced Science Focus     Free   (Followers: 1)
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: 5)
Advances in High Energy Physics     Open Access   (Followers: 13)
Advances in Imaging and Electron Physics     Full-text available via subscription   (Followers: 3)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 16)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 15)
Advances in OptoElectronics     Open Access   (Followers: 3)
Advances In Physics     Hybrid Journal   (Followers: 9)
Advances in Physics Theories and Applications     Open Access   (Followers: 8)
Advances in Remote Sensing     Open Access   (Followers: 9)
AIP Advances     Open Access   (Followers: 6)
AIP Conference Proceedings     Full-text available via subscription   (Followers: 2)
American Journal of Applied Sciences     Open Access   (Followers: 30)
American Journal of Condensed Matter Physics     Open Access   (Followers: 5)
American Journal of Signal Processing     Open Access   (Followers: 9)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 2)
Annalen der Physik     Hybrid Journal   (Followers: 3)
Annales Geophysicae (ANGEO)     Open Access   (Followers: 4)
Annales Henri PoincarĂ©     Hybrid Journal   (Followers: 1)
Annales UMCS, Physica     Open Access  
Annals of Nuclear Medicine     Hybrid Journal   (Followers: 4)
Annals of Physics     Hybrid Journal   (Followers: 3)
Annals of West University of Timisoara - Physics     Open Access  
Annual Reports on NMR Spectroscopy     Full-text available via subscription   (Followers: 1)
Annual Review of Analytical Chemistry     Full-text available via subscription   (Followers: 9)
Annual Review of Condensed Matter Physics     Full-text available via subscription   (Followers: 1)
Annual Review of Materials Research     Full-text available via subscription   (Followers: 4)
APL Materials     Open Access   (Followers: 7)
Applied Composite Materials     Hybrid Journal   (Followers: 36)
Applied Physics A     Hybrid Journal   (Followers: 10)
Applied Physics Frontier     Open Access   (Followers: 1)
Applied Physics Letters     Hybrid Journal   (Followers: 26)
Applied Physics Research     Open Access   (Followers: 6)
Applied Physics Reviews     Hybrid Journal   (Followers: 8)
Applied Radiation and Isotopes     Hybrid Journal   (Followers: 5)
Applied Remote Sensing Journal     Open Access   (Followers: 10)
Applied Spectroscopy     Full-text available via subscription   (Followers: 15)
Applied Spectroscopy Reviews     Hybrid Journal   (Followers: 3)
Archive for Rational Mechanics and Analysis     Hybrid Journal   (Followers: 3)
Asia Pacific Physics Newsletter     Hybrid Journal  
ASTRA Proceedings     Open Access  
Astronomy & Geophysics     Hybrid Journal   (Followers: 3)
Astrophysical Journal Letters     Full-text available via subscription   (Followers: 3)
Astrophysical Journal Supplement Series     Full-text available via subscription   (Followers: 3)
Atoms     Open Access  
Attention, Perception & Psychophysics     Full-text available via subscription   (Followers: 10)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 5)
Axioms     Open Access  
Bangladesh Journal of Medical Physics     Open Access  
Bauphysik     Hybrid Journal   (Followers: 1)
Biomaterials     Hybrid Journal   (Followers: 35)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 16)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 14)
Biophysical Reviews     Hybrid Journal  
Biophysical Reviews and Letters     Hybrid Journal   (Followers: 3)
BMC Biophysics     Open Access   (Followers: 7)
BMC Nuclear Medicine     Open Access   (Followers: 5)
Brazilian Journal of Physics     Hybrid Journal  
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 5)
Bulletin of Materials Science     Open Access   (Followers: 42)
Bulletin of the Atomic Scientists     Full-text available via subscription   (Followers: 4)
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 FĂ­sica     Open Access  
Canadian Journal of Physics     Full-text available via subscription   (Followers: 1)
Case Studies in Nondestructive Testing and Evaluation     Open Access  
Cells     Open Access   (Followers: 1)
Central European Journal of Physics     Hybrid Journal   (Followers: 2)
CERN courier. International journal of high energy physics     Free   (Followers: 1)
Chinese Journal of Astronomy and Astrophysics     Full-text available via subscription   (Followers: 1)
Chinese Journal of Chemical Physics     Hybrid Journal   (Followers: 1)
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: 2)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 3)
Communications in Theoretical Physics     Full-text available via subscription   (Followers: 1)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 102)
Composites Part B : Engineering     Hybrid Journal   (Followers: 126)
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  
Computational Science and Discovery     Full-text available via subscription  
Computer Physics Communications     Hybrid Journal  
Contemporary Concepts of Condensed Matter Science     Full-text available via subscription  
Contemporary Physics     Hybrid Journal   (Followers: 12)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 3)
Contributions to Plasma Physics     Hybrid Journal   (Followers: 2)

        1 2 3 4 5 6 | Last

Journal Cover   Colloid Journal
  [SJR: 0.31]   [H-I: 19]   [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  [2292 journals]
  • A study of the effect of the composition of hydrated chromium oxides on
           their electrorheological activity
    • Abstract: Abstract X-ray amorphous hydrated chromium oxides of variable compositions have been obtained, with the total number of water moles in them being 4.0–4.9 depending on the conditions of precipitation and aging. It has been established that, along with the structural water contained in the form of OH groups, strongly bound hydration water molecules are present that are eliminated in a temperature range of 60–300°C. Electrorheological activity of suspensions based on partly dehydrated chromium oxides has been studied. The electrorheological effect increases with the number of water moles in a dispersed oxide and suspension temperature.
      PubDate: 2015-05-01
       
  • Structural, rheological, and electrical properties of suspensions of
           carbon black with different oxidation degrees in polar and apolar
           dielectric dispersion media
    • Abstract: Abstract The structural, rheological, and electrical characteristics of carbon black (CB) suspensions with different oxidation degrees of particles have been studied in polar and apolar media. The structural characteristics have been determined for individual particles and particle aggregates of CB in a powdered form and in dispersion media. The yield stresses of CB suspensions in Vaseline oil (VO) and castor oil (CO) increase with the oxidation degree of particle surface; however, at the same oxidation degree of particles, the yield stress of suspensions in VO is, as a rule, lower than that in CO. In all suspensions, the calculated sizes of secondary aggregates decrease with a rise in the CB oxidation degree; however, at the same oxidation degree, the secondary aggregates in suspensions in VO are, as a rule, larger than those in suspensions in CO. Possible mechanisms of the electrical conductivity of the suspensions have been considered both at rest and under different regimes of dynamic actions. An interpretation has been proposed for the appearance and shifts of dilatantcy peaks for CB suspensions as depending on the oxidation degree of CB particle surface and the nature of a dispersion medium.
      PubDate: 2015-05-01
       
  • Interaction of diphenylpolyenes with SiO 2 surface under conditions of
           liquid chromatography
    • Abstract: Abstract Thin-layer and high-performance liquid chromatography methods have been employed to study the interaction of diphenylpolyenes with the surfaces of SiO2 (silica gel) and SiO2-C18 in organic and aqueous media. Electronic absorption spectra of diphenylpolyenes have been measured in different solvents, and the constants of their chromatographic retention on the solid phase surface have been determined. The interaction of diphenylpolyenes with SiO2 surface in a binary organic solvent and with SiO2-C18 surface in a water-organic solvent has been shown to intensify in the series cis-1,2-diphenylethylene < trans-1,2-diphenylethylene < trans-1,4-diphenyl-1,3-butadiene < trans-1,6-diphenyl-1,3,5-hexatriene. The retention constants of diphenylpolyenes have been revealed to depend on the geometry and configuration of their molecules, the length of an olefin fragment, and the nature and polarity of an eluent.
      PubDate: 2015-05-01
       
  • Thermodynamic stability of finely dispersed Na + Cl − (H 2 O) n
           aerosol particles in water vapor
    • Abstract: Abstract Four qualitatively different thermodynamic states have been identified for hydrated sodium chloride ion pairs in water vapor. Two of the states are stable, and the other two are unstable. The stable states of a contact ion pair (CIP) and a solvent-separated ion pair (SSIP) represent sites of heterogeneous nucleation in supersaturated vapors. The unstable states form free energy barriers that separate the stable states. As the temperature is elevated, the SSIP states become more stable than the CIP states already in unsaturated water vapors. Hydrated ion pairs that contain hydroxonium ions instead of alkali metal cations are absolutely stable in the SSIP state already in the range of unsaturated vapors and low temperatures. Computer-assisted calculations of the free energy and work of hydration have been carried out by the Monte Carlo bicanonical statistical ensemble method in terms of a detailed model of interactions comprising polarization, many-particle covalent interactions, and charge transfer phenomena.
      PubDate: 2015-05-01
       
  • Polishing and cold welding of gold nanoparticles under the action of
           Fenton’s reagent
    • Abstract: Abstract The possibility of chemical polishing of gold nanoparticles and composite FeOOH core/Au shell nanoparticles in their colloidal solutions with the use of Fenton’s reagent has been studied. The addition of Fenton’s reagent to a citrate gold sol causes oxidation of citrate ions, which stabilize the system, down to their almost complete elimination from the nanoparticle surface. This leads to the formation of crystallization contacts between the nanoparticles (i.e., to their “cold welding”) even at a rather low temperature (70°C). At the same time, the action of Fenton’s reagent on FeOOH/Au composite particles results in the polishing of the gold shells, i.e., a reduction in the degree of their roughness.
      PubDate: 2015-05-01
       
  • Peculiarities of the transport properties of chitosan films. 1.
           Concentration prehistory of pervaporation
    • Abstract: Abstract Chitosan films prepared by the thermal method from molding solutions containing ethanol as a chitosan precipitant have been used as separating membranes for pervaporation of an aqueous isopropanol solution. The flux density and permeate composition have been determined as functions of the composition of a molding solution and a solution to be separated, as well as the concentration prehistory of the separation process. The concentration prehistory reflects the specific features of swelling polymer sorbents, which are distinguished by a labile structure and macroscopic sorption deformations. The existence of a concentration prehistory implies that, at a fixed concentration of an initial solution, parameters characterizing the transport properties of a polymer depend on the process route in which this concentration has been achieved. The composition of a molding solution and the route of variations in the initial concentration of a solution to be separated that correspond to the highest value of our criterion for the process efficiency have been determined. It has been shown that, in the case of films formed from a solution containing 20 wt % ethanol, the water flux density reversibly increases by more than 100 times as compared with the flux density of a water-alcohol solution.
      PubDate: 2015-05-01
       
  • Adsorption of Bi III on Pt nanoparticles leading to the enhanced
           electrocatalysis of glucose oxidation
    • Abstract: Abstract The nanocomposites of BiIII/Pt nanoparticles (PtNPs) were prepared using an operationally simple method, in which BiIII spontaneously adsorbed onto the surface of PtNPs to form a submonolayer by the strong interactions between BiIII and Pt. The adsorption of BiIII on PtNPs was confirmed by electrochemical studies. Without PtNPs, BiIII did not adsorb directly on the surface of glassy carbon electrode. The specific chemistry resulted in high electrocatalysis performance of the obtained nanocomposites toward glucose oxidation compared with PtNPs alone because of the dual effects of Bi(III). On the one hand, Bi tends to bind OH− from alkaline solution and then to share it with the adjacent Pt atom. This binding leads to an increase in number of hydroxylated Pt centers, which are the active species for the electrochemical oxidation of glucose. On the other hand, Bi acts as a binder to cross-link PtNPs and to immobilize them on the surface of glassy carbon electrode. The fabricated BiIII/PtNP nanocomposites may have the potential applications in the areas of electrocatalysis or electroanalysis.
      PubDate: 2015-05-01
       
  • Quantum-chemical simulation of nanoparticle formation from copper
           carboxylates
    • Abstract: Abstract The DFT B3LYP/6-31G** quantum-chemical method has been employed to study the structure of copper carboxylate complexes and clusters composed of copper atoms and carboxylate molecules. Peculiarities of nanoparticle formation from the carboxylates under the conditions of their clustering have been considered. It has been established that the growth of Cu(1+) complexes begins from structures containing three copper atoms, while a complex containing two copper atoms is thermodynamically disadvantageous. The complexation is accompanied by the passage from a bidentate-cyclic carboxylate-metal coordination, which is typical of a monomeric salt, to a bidentate-bridging coordination. As the size of a complex increases, the energy of the attachment of a salt molecule and a metal atom to the growing nanoparticle increases, tending to some limit. It has been shown that nucleation of a nanoparticle may be accompanied by an additional stabilization via the direct coordination of a metal atom with a carboxyl group. The direction of the process to the formation of either metal nanoparticles or mixed clusters is determined by the gain in the Gibbs free energy.
      PubDate: 2015-05-01
       
  • Structural and electrosurface properties of porous glass particles
    • Abstract: Abstract The structural, adsorption, and electrokinetic properties of powders of sodium-borosilicate porous glasses (PGs) with different structures and morphologies of the pore space, as well as the properties of diaphragms formed from these powders, have been studied as depending on pH (in a range of 4–9) and NaCl solution concentrations (10−3-1 M). The determined structural parameters of the porous glasses indicate that meso- and macroporous glass particles with a layered-porous structure, a rather narrow pore size distribution, and a high total porosity have been obtained. It has been found that the surface and electrokinetic characteristics of the studied PGs fall into the range of the values reported in the literature for analogous interfaces. The results of measuring the electrophoretic mobility for porous particles and the streaming potential for the diaphragms formed from the PG particles have been analyzed and compared.
      PubDate: 2015-05-01
       
  • Aggregation stability of monodisperse silica sol in NaCl and BaCl 2
           solutions
    • Abstract: Abstract The aggregation kinetics of a monodisperse silica sol with an average particle size of 220 nm and particle number concentration n 0 = 1010 cm−3 in aqueous solutions of NaCl and BaCl2 at pH 6.2 is studied with the help of photometry. The stability of diluted sols (n 0 = 107 cm−3) in NaCl solutions is investigated by the direct method of flow ultramicroscopy. The results obtained are analyzed in terms of the theories of the Hogg-Yang barrierless coagulation and the Muller reversible coagulation. It is established that the slow coagulation of both concentrated and diluted sols proceeds via the barrierless mechanism in the secondary potential minimum.
      PubDate: 2015-05-01
       
  • Synthesis and characterization of novel cross-linking poly(butyl acrylate-
           co -isobornyl methacrylate) colloids prepared via semi-continuous seeded
           emulsion polymerization
    • Abstract: Abstract The novel cross-linking (butyl acrylate-co-isobornyl methacrylate) colloids are prepared via semi-continuous seeded emulsion polymerization of butyl acrylate, isobornyl methacrylate and N-methylol acrylamide in aqueous phase using mixture of polyethylene glycol mono(octylphenyl) ether and sodium dodecyl sulphate as emulsifier and potassium persulphate as initiator. The optimal composition for preparing the novel cross-linking colloid was determined, and the structure of the as-prepared colloid was confirmed with FTIR spectrum. The formation of colloidal polymer was also corroborated by a difference between glass transition temperatures of colloid film and corresponding homopolymers. Calorimetry measurements showed that the colloid is composed of random copolymer. The particle size distribution exhibits unimodal character, suggesting a high stability of the colloid polymer.
      PubDate: 2015-05-01
       
  • An AOT reverse micelle in a medium of supercritical carbon dioxide
    • Abstract: Abstract Reverse micelles of Aerosol OT in the medium of supercritical carbon dioxide have been simulated by the molecular dynamics method. For the first time, a micelle in ternary water-Aerosol OT-supercritical CO2 has been simulated by describing the surfactant and the supercritical liquid in terms of the coarse-grained approach. It has been shown that the structural and energetic characteristics of the micelle are, with a good accuracy, described within the framework of simplified models.
      PubDate: 2015-05-01
       
  • Gelatin hydrogel as a model for assessment of the wettability and
           water-resistance of polypeptide materials
    • Abstract: Abstract Data have been presented on wetting of the surfaces of gelatin hydrogels and natural chamois leather with water and sunflower oil both in the initial state and after treatment with hydrophobizing agents—poly(1,1,2,2-tetrahydroperfluoroalkylmethyl acrylates), where perfluoroalkyl is n-C6F13 and n-C8F17. The kinetics of variations in the contact angles of water droplets on the hydrogel and leather has been analyzed in order to determine the correlation between the wettability and water-resistance of the samples treated with the hydrophobizing agents.
      PubDate: 2015-05-01
       
  • Colloido-chemical characteristics of porous glasses with different
           compositions in KNO 3 solutions. 2. Electrosurface characteristics of
           porous glass particles
    • Abstract: Abstract The surface charge and electrophoretic mobility of particles of porous glasses with different compositions have been studied in potassium nitrate solutions with concentrations of 10−3–10−2 M. It has been shown that the surface charge in KNO3 solutions virtually coincides with the charge in KCl solutions and has negative values in the studied pH range of 4–9. The concentrations and mobilities of ions in glass pores, Donnan potentials, and the convection component of electrical conductivity have been calculated within the framework of a homogeneous model. Electrokinetic potentials of the glasses under investigation have been calculated with regard to the effect of the electrolytic conductivity of the porous particles and electroosmotic transport in the pore space on the electrophoretic mobility.
      PubDate: 2015-05-01
       
  • Reply to a comment by P.Yu. Apel’
    • PubDate: 2015-05-01
       
  • Large-scaled clusters in aqueous glucose solutions
    • Abstract: Abstract The presence of large-scaled clusters with sizes of larger than 100 nm in aqueous glucose solutions has been revealed with the help of dynamic light scattering. These clusters have been assumed to be ordered regions, in which α-glucose molecules separated by water molecules have predominantly the same orientation.
      PubDate: 2015-05-01
       
  • Defect structure of nanosized mechanically activated MoO 3
    • Abstract: Abstract Defect structure of mechanically activated MoO3 has been studied with the use of X-ray diffraction, Raman spectroscopy, electron paramagnetic resonance, laser granulometry, and adsorption methods. Two stages of mechanical activation have been distinguished. At mechanical activation doses below 1 kJ/g, the fracture of oxide particles is the main process. At this stage, MoO3 particle sizes decrease from 30 μm to 60 nm and specific surface area linearly increases to 30 m2/g, the sizes of coherent-scattering regions decrease to 18 nm, paramagnetic centers are accumulated, and the Raman spectral bands corresponding to three different types of Mo-O bonds widen and shift. At doses above 1 kJ/g, the main process consists in the friction and aggregation of particles, which is accompanied by some reduction in the specific surface area and an increase in the particle sizes. At the stage of friction, the phase transition from an orthorhombic modification to a monoclinic modification of MoO3 occurs seemingly due to a shift of one layer of the material in plane (100). The shift is accompanied by the accumulation of lattice microstrains in the same plane, formation of “stressed” Mo-O-Mo bridge bonds, and a substantial rise in the concentration of Mo5+ radicals. The maximum total concentration of paramagnetic centers is 1 × 1018 g−1. It may be assumed that the radicals are formed due to the rupture of the most stressed molybdenum-oxygen bridge bonds.
      PubDate: 2015-05-01
       
  • Diffusion deposition of submicron aerosol particles in screen filters
    • Abstract: Abstract The deposition of submicron aerosol particles on metal screens has been studied at small Reynolds numbers. The obtained experimental data have been compared with theoretical estimates of the deposition of Brownian particles in a model fibrous filter with allowance for a finite particle size and the existence of a Knudsen boundary layer on a wire surface, with the thickness of the layer being, under normal conditions, comparable with particle sizes. The possibility of using screen diffusion batteries for determining the average diffusion coefficient of submicron particles and as test filters has been discussed.
      PubDate: 2015-05-01
       
  • Comment on the article by A.I. Vilenskii, K.G. Sabbatovskii, V.D. Sobolev,
           and B.V. Mchedlishvili “Electrophysical Properties of Latent Tracks
           of Heavy Ions in Polymers”
    • PubDate: 2015-05-01
       
  • Peculiarities of the transport properties of chitosan films. 2. Density of
           pervaporation flux through chitosan films with different areas
    • Abstract: Abstract Transmembrane flux density may depend on membrane area, provided that the properties of the membrane vary with variations in the latter. This situation takes place for pervaporation processes realized with the use of chitosan films swelling in water-isopropanol solutions being separated. In this work, the flux density and permeate composition have been determined as depending on the composition of a molding solution containing a precipitant as one of its components, concentration of a solution being separated, and film area (2 and 20 cm2) in pervaporation setups. Irrespective of the composition of a molding solution, abnormally high flux densities of water and isopropanol, as compared with the flux density of a water-alcohol solution, take place for chitosan films with an area of 20 cm2. When the pervaporation is performed through a 2-cm2 film, all observed abnormalities disappear with the exception of the only one: the permeates is enriched with isopropanol in all experiments.
      PubDate: 2015-05-01
       
 
 
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