erratum

Abstract Works devoted to studying the effect of active environments on damageability of surfaces of solid bodies and materials upon contact actions (Rehbinder effect) have been briefly reviewed. A novel procedure, which combines microscratching and electrochemical reduction of an active component on a studied material surface, has been described. This procedure enables one to simulate and study the

Abstract The work is devoted to the application of the Hill method for calculating the chemical potential of a molecule in the one-component homogeneous molecular system within computer simulations. This method is based on the double integration of molecular radial distribution functions, which depend on the additional parameter that controls the strength of interactions between the molecules. The

Abstract In this research work, we have investigated the Stokesian flow of a micropolar fluid in a cylindrical tube enclosing an impermeable core coated with porous layer in the presence of magnetic field. The axis of the cylinder is taken along the direction of fluid flow and the uniform magnetic field is applied in the direction perpendicular to the axis of the cylinder. Using appropriate boundary

Abstract This article presents experimental data on the coefficients of viscosity and thermal and electrical conductivities, as well as the absorption spectra, of suspensions of ultradispersed diamonds. Suspensions of UDA-S and UDP-A detonation nanodiamond particles, as well as UDP-AG diamond–graphite powder, are used in the experiments. The concentration of nanodiamonds in distilled water is varied

Abstract The deposition of aerosol nanoparticles has been studied in a model granular filter composed of parallel monolayers of contacting spherical granules with a square packing, where each even monolayer is shifted in its plane relative to an odd layer by the granule radius in two directions normal to one another. The monolayers of the granules are oriented normal to an incident flow. The efficiencies

Abstract In scope of the Poisson–Boltzmann theory, the electrostatic potential profiles in the vicinity of spherical particles immersed in 1 : 1 electrolyte solutions have been precisely calculated. Using the data on the behavior of the profiles at large distances from the particle surface, effective surface potential \({{\psi }_{{{\text{eff}}}}},\) and its limiting value \(\psi _{{{\text{eff}}}}^{{{\text{sat}}}}

Abstract A method is proposed for the neural network based analysis of the existence and stability of grain boundary complexions formed at high-symmetry tilt boundaries Σ3 (111) and Σ5 (210) in a polycrystalline Ni(Bi) solid solution. This method is based on the use of reference interparticle interaction potentials constructed within the framework of the density functional theory in combination with

Abstract Crosslinked cationic particles 200–600 nm in diameter have been synthesized via emulsifier-free copolymerization of methyl methacrylate and 2-aminoethyl methacrylate hydrochloride in the presence of cross-linking agents (N,N'-methylenebisacrylamide, triethylene glycol dimethacrylate, and diethylene glycol dimethacrylate). It has been shown that polymer particles with a maximum concentration

Abstract Specific features of small-angle light scattering by aqueous magnetic emulsions under the action of a magnetic field and a hydrodynamic field of a rotating fluid have been investigated. It has been shown that the experimentally observed diffraction lines that have no pronounced maxima and minima are due to diffraction on an irregular system of droplet chains arising in the magnetic field.

Abstract Ethoxy- and aminoderivatives of natural polymers, humic acids, have been obtained via mechanochemical synthesis in a vibrational apparatus. The structure and physicochemical properties of their macromolecules have been studied by IR and UV spectroscopies. The average molecular mass of the products has been determined. The pendant drop shape and oscillating pendant drop methods have been employed

Abstract Physicochemical regularities are studied for the synthesis of molded active carbons based on coconut shells and peat, with a latex emulsion and a carboxymethyl cellulose (CMC) sodium salt solution being used as binding agents. The materials are obtained at compacting pressures of 25, 50, and 100 MPa. The specific surface areas of the composite samples obtained from peat and coconut shells

Abstract The perspectives of using γ-mercaptopropyltrimethoxysilane as a precursor for creating multifunctional composite nanoparticles (CNPs) with a rodlike gold core and an organosilica shell have been analyzed. It is shown that the presence of thiol groups, which are capable of specific interactions with metal ions and atoms, in the shell makes it possible to “directly” (i.e., without any additional

Abstract Ionized products of desorption of thiosemicarbazides from a steel target surface before and after deposition of solid solutions of thiosemicarbazides in organic matrices (nicotinic acid, α-cyano-4-hydroxycinnamic acid, 2,5-dihydroxybenzoic acid, and dithranol) onto it have been studied by mass spectrometry. 2,5-Dihydroxybenzoic acid has been revealed to be a universal matrix for studying the

Abstract Three types of layered double hydroxides (LDHs) including Zn–Al and Mn-doped Zn–Al LDHs with Mn 2 and 10 mol % respect to Zn content (Zn–Al, Zn–Mn1–Al and Zn–Mn2–Al, respectively) were prepared. The effect of various parameters such as time, boron concentration, pH, temperature, ionic strength and competing anions were investigated to compare the efficacy of synthesized LDHs for boron adsorption

Abstract A comparative analysis has been performed for silver nanoparticle dispersions obtained by the chemical reduction of Ag+ ions using several samples of chitosan with different molecular masses as reductants and stabilizers. The structure and conductivity of ring deposits resulting from the evaporation of droplets of the obtained dispersion have been studied. It has been shown that the average

Abstract A continuous laminar flow reactor for the synthesis of nanopowder in microemulsion is described. The reactor is suitable for separated handling with nucleation, growth, and stabilization processes. The synthesis of iron oxide nanoparticles was selected as a model case. A water−sodium dodecyl sulphate−cyclohexene system was used as the microemulsion system for dissolving reactive aqueous solution

Abstract Highly porous polymer materials with preset pore sizes and porosities can be prepared via polymerization of dispersion media of highly concentrated water-in-oil emulsions. In this work, the effect of divinylbenzene concentration in styrene–divinylbenzene mixed dispersion media of highly concentrated emulsions on the emulsion stability and the structure of resulting polymer materials has been

Abstract By the example of highly concentrated water-in-oil emulsions, in which droplets of a supersaturated aqueous ammonium nitrate solution are dispersed in industrial oil, it has been shown that a thermodynamically stable state is possible due to the limited volume of dispersed phase particles.

Abstract— Enzymes play significant roles in both life and industry, and increasing enzymatic activity has been a long-term goal of the biochemical science. Recently, it has been reported that nanomaterials can enhance both the specificity and yield of polymerase chain reaction (PCR) though the mechanism of this enhancement remained unclear. By using gold nanoparticles (AuNPs) as model nanomaterials

Abstract An analytic solution for the two-layered model of pulsatile blood flow in stenotic arteries is discussed. The blood flow in narrow arteries is assumed to obey the two-fluid model: non-Newtonian viscoelastic as Jeffrey fluid in core region, and Newtonian as plasma fluid in peripheral region. The present study is aimed to develop an oscillatory viscoelastic model of blood flow and obtain the

Abstract The kinetics of adsorption of two polylysine samples with different molecular weights from aqueous solutions on the surface of fused quartz has been studied by the capillary electrokinetics method. It has been found that the adsorption of positively charged polylysine on the negatively charged quartz surface decreases the absolute value of the initial ζ potential; moreover, in the case of

Abstract It has been shown that, when passing from the Becker–Döring finite-difference equations to the differential kinetic equation for the function of aggregate distribution over aggregation numbers, the value of the error in the calculation of the times of fast relaxation in a micellar solution is primarily determined by the approximation used for the behavior of the aggregation work in the vicinity

Abstract Water may be involved in reverse micelle formation either in the form of a hydration shell or as a solubilisate. Both cases have been analyzed within the framework of a theory based on the mass action law and the definition of the critical micelle concentration (CMC) via the constant of this law. In the first case, it is supposed that a surfactant is primordially hydrated, and water is a priori

Abstract The goal of this work is the experimental verification of a recently formulated thermodynamic theory of the temperature dependence of sessile bubble contact angle [Rusanov, A.I., Colloid J., 2020, vol. 82, p. 303]. In particular, the possibilities of an increase in small contact angles and a decrease in large ones (larger than 90°) are tested. The experiments are carried out with a bubble

Abstract The influence of a magnetic field on the features of photoinduced thermocapillary deformation of the free surface of a magnetic fluid layer is considered for the first time. Deformation occurs as a result of local heating of the surface under the action of an incident laser beam and manifests itself as a curvature of the fluid surface profile. The laser beam reflected from the deformed surface

Abstract To date, it has been reliably shown by direct methods that a sessile droplet on a solid surface causes deformation of the substrate. For solids with rather low elasticity moduli, in particular, elastomers, this phenomenon becomes observable, and the deformation work reaches values sufficiently large to take it into account in the theory when necessary. Within the framework of the current theory

Abstract A boundary perturbation method is presented to investigate the modified micropolar Brinkman model. A slightly micro-corrugated cylindrical tube is filled with a porous medium in which a micropolar fluid flows through its pores. Stationary random model is used to mimic the surface roughness of the tube. The amplitude of the corrugations, which are perpendicular to the flow, is assumed to be

Abstract The review analyzes the general trends of the studies devoted to the encapsulation of various functional compounds (from drugs to corrosion inhibitors) in silica mesoporous container particles (MCPs). The main focus is on discussing new approaches to creating such structures. Primarily, they are approaches that allow one to combine the stages of the synthesis of MCPs and their loading with

Abstract The droplet coalescence theory, which implies the refinement and further development of the Frenkel approach, has, for the first time, been used for predicting the characteristic time of coalescence of nanodroplets. The coalescence times obtained for gold nanodroplets agree, in the order of magnitude, with the results of our molecular-dynamics experiments. In addition, the characteristic times

Abstract Surface properties of aqueous dispersions of bovine serum albumin complexes with silica nanoparticles have been studied using a set of methods that are sensitive to changes in the structure and composition of surface layers. In spite of the similar charges of the components, their interaction leads to changes in the surface properties of the dispersions; namely, the rates of variations in

Abstract The resistance model has been employed to derive an expression for the permeability of a composite membrane taking into account the viscous flow of a gas and the porous structure of a membrane support. Mathematical simulation has been used to show that, when the material of a selective layer does not penetrate into the pores of the skin layer of the support, the viscous flow of a gas in the

Abstract The basic factors influencing the quality of thin films prepared by the spin-coating technique from thermosetting stoichiometric epoxy-amine mixtures have been studied. It has been shown that films 2.5–3.0 nm thick are formed on silicon supports from a 0.025 wt % solution of the stoichiometric mixture of epoxy resin and amine in toluene. Multilayer polymer coatings with thickness up to 40

Abstract Polydopamine is formed via dopamine hydrochloride (DAH) polymerization in a slightly alkaline medium (pH 8.5) both in a solution bulk and at a liquid–gas interface. Atmospheric oxygen and oxygen dissolved in the bulk solution serves as an oxidizing agent. Compression isotherms of polydopamine films formed at the interface for different times at different initial DAH concentrations have been

Abstract Approaches have been proposed for determining the dispersity of a gold organosol with an AOT concentration of 0.25 M by examining the surface of an Au–AOT composite film by scanning electron microscopy (SEM) and atomic force microscopy (AFM) methods. The film has been obtained from a concentrated sol by the Doctor Blade method and subjected to thermolysis at 523 K for 2 h. The composite consists

AbstractThe mechanical characteristics of bacterial cellulose (one of the most promising cellulose-based nanomaterials) fundamentally depend on its moisture content. It has been found that the effect of aqueous solutions of alkali metal chlorides on its strength and deformation properties is determined by the mobility of water molecules in the near coordination spheres of cation hydration shells.

AbstractThe structure-related morphological characteristics and fractional composition of Al–2B composite powders obtained by mechanical alloying have been studied as depending on the physicochemical conditions of the process. Quantitative data on the morphology, microstructure, and particle size distribution functions of the composite powders have been obtained at different stages of their mechanical

AbstractThe main colloid-chemical properties have been determined for Ce0.5Zr0.5O2 hydrosols, the particles of which consist of a solid solution of cerium and zirconium dioxides. It has been shown that these hydrosols have aggregative stability close to that of ZrO2 hydrosols, although their particles contain 50 mol % cerium dioxide, which is less hydrophilic than zirconium dioxide. The sizes, densities

AbstractThe rheological properties of concentrated suspensions containing 55 and 60 vol % aluminum particles are studied. This concentration range corresponds to the transition from the viscoelastic to the elastoplastic behavior of the suspensions. Moreover, this range is most favorable for powder injection molding of metals and ceramics. The measurements are performed in a rheometer at different shear

AbstractDimensionally stable aerogels that retain their shapes and geometric sizes in solutions have been formed from cellulose subjected to an intense mechanical treatment in combination with freeze-thawing. This treatment has resulted in partial separation of numerous micro/nanosized fibrils that surround residual fibers. Their entanglement promotes an increase in the mechanical strength and stability

AbstractIn connection with the development of methods for the delivery of lipophilic drugs in a bioavailable form, we have employed an integrated approach to the investigation of the adsorption of an antihypertensive drug, felodipine, at interfaces that simulate the surfaces of different carriers. Isotherms have been plotted for felodipine adsorption from solutions in heptane (C = 2.13 × 10–5 − 4.26

AbstractIn addition to our previous work [1], a detailed analysis has been carried out for the angular dependences of all components of the pressure tensor in a wedge-shaped cavity of a solid with dispersion forces. It has been shown that the pressure tensor components satisfy the conditions of mechanical equilibrium as a function of the distance from the walls of the wedge-shaped cavity and the angular

AbstractA vacancy has been formed in a crystal lattice by removing an iodine anion from the crystallographic layer nearest to the surface on the basal face of the β-modification of silver iodide. The Monte Carlo method has been employed to study the molecular structure of condensed water phase nuclei growing in the field of the vacancy from a vapor at 260 K. The images and spatial correlation functions

AbstractTwo modifications of the mass action law are considered as applied to defining the critical micelle concentration (CMC) via constant K of the law. The first, traditional, modification defines the CMC as \({{K}^{{1/(1 - n)}}},\) where n is the aggregation number, and the second one—as \({{(Kn)}^{{1/(1 - n)}}}.\) In both cases, the formulation of the mass action law is extremely simplified due

AbstractThe deposition of aerosol particles in diffusion batteries composed of model screens oriented perpendicularly to a Stokes flow has been considered. The particle collection efficiencies have been calculated as depending on screens parameters and the Peclet diffusion number. It has been shown that, at large Peclet numbers, the particle penetration through dense screens is independent of the interscreen

AbstractThe electrosurface properties have been experimentally studied for different monodisperse fractions of hydrosol particles of detonation nanodiamond (DND) obtained by air annealing of particle agglomerates, their deagglomeration by sonication in demineralized water, and subsequent centrifugation of resulting hydrosols. The acid-base potentiometric titration and laser Doppler electrophoresis

AbstractThe laws and mechanisms of adsorption of Cu(II) ions by well characterized and oxidized N‑doped multi-walled carbon nanotubes (N-CNTs) are discussed. The samples were synthesized by catalytic chemical vapour deposition method using n-butylamine as a carbon source and their surface was functionalized by oxidation with mixture of concentrated H2SO4 and HNO3. The morphology, chemistry and charge

AbstractMolecular dynamics has been employed to study conformational rearrangements of polyampholytic polypeptides adsorbed on the surface of a metal nanoparticle, with the rearrangements being caused by changes in the direction of particle polarization at a frequency corresponding to microwave electric field. The time dependences of the dipole moments, as well the radial and angular density distributions

AbstractThe effect of the concentration and of the composition of mixtures of a traditional surfactant sodium dodecyl sulphate (SDS) and of linalool (LL), a volatile fragrance with surface-active properties, on the surface tension of their aqueous solutions has been studied. Surface tension was measured both under equilibrium and under dynamic conditions of the surface formation (in a time range of

AbstractThe dependence of liquid contact angle on the pressure in a gaseous mixture occurring in contact with the liquid has been considered on the basis of the general thermodynamic relations reported in the previous work for small although macroscopic bubbles and droplets. The cases of a sessile droplet brought in a direct contact with a gas occurring under a certain pressure and a sessile bubble

AbstractResults of studying the electric polarizability of colloidal graphite particles in an aqueous 1 : 1 electrolyte solution at frequencies of 100 Hz to 2.5 MHz have been presented. The polarizability anisotropy, surface conductivity, and electrokinetic potential of graphite particles have been investigated in aqueous KCl solutions with concentrations lower than 0.2 mmol/L. The dispersion of polarizability

AbstractSorption of histidine in the cationic and zwitterionic forms on a framework aluminosilicate, clinoptilolite, has been investigated. The contributions of the exchange and nonexchange mechanisms of sorption to the sorption capacity have been determined. It has been shown that monolayer histidine sorption on clinoptilolite by the ion-exchange mechanism proceeds due to the electrostatic interaction

AbstractThe peculiarities of the synthesis of silica-based mesoporous container particles with the use of sodium oleate as a templating agent have been discussed. Sodium oleate is an anionic surfactant and an efficient corrosion inhibitor. It has been shown that the container particles obtained as a result of combining the stages of their synthesis and loading contain a very large amount of the inhibitor

AbstractA review of the theoretical data accumulated for the last decade on the diffusion kinetics of the stage of homogeneous nucleation of liquid droplets and gas bubbles in multicomponent systems has been presented. In addition to the previously known results, the review contains new relations and discussions that represent the further development of own studies. Thermodynamic expressions that relate

AbstractA high-productivity method has been proposed for the synthesis of silver nanoparticles with sizes of 11.2 ± 0.3 nm in water-in-oil emulsions stabilized with sorbitan monooleate (Span 80). It has been shown that, in the course of the synthesis, initial reagents are transferred from emulsion droplets into Span 80 micelles. As a result, nanoparticles are formed due to the intermicellar exchange

AbstractThe structural characteristics (structural resistance coefficient, volume porosity, tortuosity coefficient, average pore radius, specific surface area) and specific electrical conductivity of high-silica micro- and macroporous glasses with different compositions (basic magnetite-free and magnetite-containing glasses) have been studied in solutions of sodium, lanthanum, and iron(III) chlorides

AbstractHydrogels have been prepared by mixing chitosan and pectin solutions, as well as solutions of their modified derivatives, in aqueous media at room temperature. The gels are obtained within a time period from several seconds to half an hour or more, depending on the process conditions. The hydrogels are formed due to both the covalent bonding between functional groups and the formation of interpolyelectrolyte

AbstractConvincing arguments have been presented testifying that that the surface tension of a small spherical droplet must decrease upon diminishing droplet radius in correspondence with a positive constant Tolman length. The solution of the Gibbs–Tolman–Koenig–Buff equation has been found in the most compact form. The surface tension of a small spherical droplet has been calculated within the framework

AbstractIn this work we present a mathematical model for the flow of two fluids (micropolar and Newtonian ) through concentric cylinders having porous space of different permeability. The Poiseuille flow of micropolar fluid takes place in core region while Newtonian fluid in the annular region of concentric cylinders respectively. An analytical expression of velocity, flow rate, micro rotational velocity

AbstractUniform silver nanoparticles with diameters smaller than 10 nm have been synthesized by the hydrothermal method on micro/nanofibrils of cellulose, which is used as a substrate, in a solution consisting of a water/ethylene glycol (reductant) mixture, a silver salt, poly(vinylpyrrolidone), and silver chloride used as a seed. Cellulose plays the role of an additional mild reductant, which prevents