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Alexandre M. Emelyanenko

Bio: Alexandre M. Emelyanenko is an academic researcher from Russian Academy of Sciences. The author has contributed to research in topics: Wetting & Contact angle. The author has an hindex of 29, co-authored 116 publications receiving 3035 citations. Previous affiliations of Alexandre M. Emelyanenko include D. Mendeleev University of Chemical Technology of Russia & University of Mons.


Papers
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Journal ArticleDOI
TL;DR: Theoretical grounds of the design of hydrophobic materials and coatings and specific features of the super-hydrophobic state of the surface are discussed in this paper, where the possibilities of the formation of various types of ordered textures that ensure high contact angles on the surfaces of the hydrophilic materials and prerequisites for thermodynamic stability of the heterogeneous wetting regime of such surfaces are analysed.
Abstract: Theoretical grounds of the design of hydrophobic materials and coatings and the specific features of the superhydrophobic state of the surface are discussed. The possibilities of the formation of various types of ordered textures that ensure high contact angles on the surfaces of hydrophobic materials and prerequisites for thermodynamic stability of the heterogeneous wetting regime of such surfaces are analysed. The main groups of methods actively used now to design materials and coatings with specified topology and structure and variable hydrophobicity are presented. The problems of ageing and degradation of superhydrophobic coatings are discussed. Examples of successful use of superhydrophobic materials in various fields of industry are given.

251 citations

Journal ArticleDOI
TL;DR: A modification of a stainless steel surface is presented to impart superhydrophobic properties to it that are robust with respect to mechanical stresses associated with cyclic icing/deicing treatment, as well as to long-term contact with aqueous media and high humidity.
Abstract: In this work, we present a modification of a stainless steel surface to impart superhydrophobic properties to it that are robust with respect to mechanical stresses associated with cyclic icing/deicing treatment, as well as to long-term contact with aqueous media and high humidity The durability of the superhydrophobic state is ensured by the texture with multimodal roughness stable against mechanical stresses and a 2D polymer network of fluorooxysilane chemically bound to the texture elements The designed superhydrophobic coating is characterized by contact angles exceeding 155° and a maximum rolling angle of 42° after 100 icing/deicing cycles

225 citations

Journal ArticleDOI
TL;DR: In this paper, the advantages of super-hydrophobic coatings as a new method for protection against atmospheric icing are considered and the basic physicochemical mechanisms determining the anti-icing performance of super hydrophobic surfaces and the problems of decreasing the efficiency of super hydrobic materials are analyzed.

214 citations

Journal ArticleDOI
TL;DR: It is shown that the surface texturing used to fabricate multimodal roughness of the surface may be simultaneously used for modifying the physicochemical properties of the thick surface layer of the substrate itself.
Abstract: We report a new efficient method for fabricating a superhydrophobic oxidized surface of aluminum alloys with enhanced resistance to pitting corrosion in sodium chloride solutions The developed coatings are considered very prospective materials for the automotive industry, shipbuilding, aviation, construction, and medicine The method is based on nanosecond laser treatment of the surface followed by chemisorption of a hydrophobic agent to achieve the superhydrophobic state of the alloy surface We have shown that the surface texturing used to fabricate multimodal roughness of the surface may be simultaneously used for modifying the physicochemical properties of the thick surface layer of the substrate itself Electrochemical and wetting experiments demonstrated that the superhydrophobic state of the metal surface inhibits corrosion processes in chloride solutions for a few days However, during long-term contact of a superhydrophobic coating with a solution, the wetted area of the coating is subjected to corrosion processes due to the formation of defects In contrast, the combination of an oxide layer with good barrier properties and the superhydrophobic state of the coating provides remarkable corrosion resistance The mechanisms for enhancing corrosion protective properties are discussed

180 citations

Journal ArticleDOI
07 Sep 2017-ACS Nano
TL;DR: The combination of superhydrophobic state, nano- and micro features of the hierarchical surface, and the appropriate composition of the surface textured layer allowed us to provide the surface with the outstanding level of resistance of superHydrophobic coatings to external chemical and mechanical impacts.
Abstract: Industrial application of metallic materials is hindered by several shortcomings, such as proneness to corrosion, erosion under abrasive loads, damage due to poor cold resistance, or weak resistance to thermal shock stresses, etc. In this study, using the aluminum-magnesium alloy as an example of widely spread metallic materials, we show that a combination of functional nanoengineering and nanosecond laser texturing with the appropriate treatment regimes can be successfully used to transform a metal into a superhydrophobic material with exceptional mechanical and chemical properties. It is demonstrated that laser chemical processing of the surface may be simultaneously used to impart multimodal roughness and to modify the composition and physicochemical properties of a thick surface layer of the substrate itself. Such integration of topographical and physicochemical modification leads to specific surface nanostructures such as nanocavities filled with hydrophobic agent and hard oxynitride nanoinclusions. ...

173 citations


Cited by
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Book
01 Jan 1971
TL;DR: In this paper, Ozaki et al. describe the dynamics of adsorption and Oxidation of organic Molecules on Illuminated Titanium Dioxide Particles Immersed in Water.
Abstract: 1: Magnetic Particles: Preparation, Properties and Applications: M. Ozaki. 2: Maghemite (gamma-Fe2O3): A Versatile Magnetic Colloidal Material C.J. Serna, M.P. Morales. 3: Dynamics of Adsorption and Oxidation of Organic Molecules on Illuminated Titanium Dioxide Particles Immersed in Water M.A. Blesa, R.J. Candal, S.A. Bilmes. 4: Colloidal Aggregation in Two-Dimensions A. Moncho-Jorda, F. Martinez-Lopez, M.A. Cabrerizo-Vilchez, R. Hidalgo Alvarez, M. Quesada-PMerez. 5: Kinetics of Particle and Protein Adsorption Z. Adamczyk.

1,870 citations

Journal ArticleDOI
TL;DR: Different strategies to achieve ice repellency on various hydrophilic and hydrophobic surfaces are reviewed with a focus on the recent development of superhydrophobic and lubricant-infused surfaces.
Abstract: Ice repellency can be achieved on various hydrophilic and hydrophobic surfaces, although a surface that repels ice under all environmental scenarios remains elusive. Different strategies are reviewed with a focus on the recent development of superhydrophobic and lubricant-infused surfaces.

979 citations

Journal ArticleDOI
TL;DR: P porous boron nitride nanosheets with very high specific surface area that exhibit excellent sorption performances for a wide range of oils, solvents and dyes are reported.
Abstract: Effective removal of oils, organic solvents and dyes from water is of significant, global importance for environmental and water source protection. Advanced sorbent materials with excellent sorption capacity need to be developed. Here we report porous boron nitride nanosheets with very high specific surface area that exhibit excellent sorption performances for a wide range of oils, solvents and dyes. The nanostructured material absorbs up to 33 times its own weight in oils and organic solvents while repelling water. The saturated boron nitride nanosheets can be readily cleaned for reuse by burning or heating in air because of their strong resistance to oxidation. This easy recyclability further demonstrates the potential of porous boron nitride nanosheets for water purification and treatment.

840 citations

Journal ArticleDOI
TL;DR: A wide range of materials, such as d-wave superconductors, graphene, and topological insulators, share a fundamental similarity: their low-energy fermionic excitations behave as massless Dirac particles rather than fermions obeying the usual Schrodinger Hamiltonian as mentioned in this paper.
Abstract: A wide range of materials, like d-wave superconductors, graphene, and topological insulators, share a fundamental similarity: their low-energy fermionic excitations behave as massless Dirac particles rather than fermions obeying the usual Schrodinger Hamiltonian This emergent behavior of Dirac fermions in condensed matter systems defines the unifying framework for a class of materials we call "Dirac materials'' In order to establish this class of materials, we illustrate how Dirac fermions emerge in multiple entirely different condensed matter systems and we discuss how Dirac fermions have been identified experimentally using electron spectroscopy techniques (angle-resolved photoemission spectroscopy and scanning tunneling spectroscopy) As a consequence of their common low-energy excitations, this diverse set of materials shares a significant number of universal properties in the low-energy (infrared) limit We review these common properties including nodal points in the excitation spectrum, density of states, specific heat, transport, thermodynamic properties, impurity resonances, and magnetic field responses, as well as discuss many-body interaction effects We further review how the emergence of Dirac excitations is controlled by specific symmetries of the material, such as time-reversal, gauge, and spin-orbit symmetries, and how by breaking these symmetries a finite Dirac mass is generated We give examples of how the interaction of Dirac fermions with their distinct real material background leads to rich novel physics with common fingerprints such as the suppression of back scattering and impurity-induced resonant states

749 citations

Journal ArticleDOI
TL;DR: It is demonstrated that airborne hydrocarbons adsorb on graphitic surfaces, and that a concurrent decrease in the water contact angle occurs when these contaminants are partially removed by both thermal annealing and controlled ultraviolet-O3 treatment.
Abstract: It is generally accepted that supported graphene is hydrophobic and that its water contact angle is similar to that of graphite Here, we show that the water contact angles of freshly prepared supported graphene and graphite surfaces increase when they are exposed to ambient air By using infrared spectroscopy and X-ray photoelectron spectroscopy we demonstrate that airborne hydrocarbons adsorb on graphitic surfaces, and that a concurrent decrease in the water contact angle occurs when these contaminants are partially removed by both thermal annealing and controlled ultraviolet-O3 treatment Our findings indicate that graphitic surfaces are more hydrophilic than previously believed, and suggest that previously reported data on the wettability of graphitic surfaces may have been affected by unintentional hydrocarbon contamination from ambient air

727 citations