Features of the occurrence of electrochemical processes in contact of sodium chloride solutions with the surface of superhydrophobic coatings on titanium

A joint analysis of the results of electrochemical studies and the evolution of the parameters of a sodium chloride solution droplet in contact with the coating under test reveals the pattern of changes in the surface state which result from the electrochemical reactions and adsorption-desorption processes at the coating/electrolyte interface. Features of the corrosion process are studied on titanium samples with different protective layers on the surface: (1) a natural oxide, (2) a coating prepared via plasma electrolytic oxidation (PEO coating), (3) a PEO coating with a hydrophobic layer, and (4) a PEO coating with a superhydrophobic nanocomposite layer. The best protective properties in a chloride-containing electrolyte are exhibited by the superhydrophobic nanocomposite coating. The mechanism of corrosion protection of this coating is formulated.     

On the Theory of the Stability of Dipole Molecule Solution Interlayers in Apolar Solvents: 1. Thermodynamics of Solution Film

Thermodynamics of the film of solution with apolar solvent and polar solute is analyzed. The expression for calculating disjoining pressure in a film via the potential electric energy of the filed generated by the solute dipoles is derived. The effect of the image forces on the orientation of dipole molecules near the interfaces is considered.     

On the Theory of the Stability of Dipole Molecule Solution Interlayers in Apolar Solvents: 4. A Localized Adsorption at the Dipole Orientation Parallel to the Interface

Image forces and their contribution to the disjoining pressure of solution films at the orientation of dipole molecules of adsorbed component parallel to the film interfaces are analyzed. Expressions for the calculation of the correlation attraction of adsorbed monolayers under various conditions of adsorption on opposite film boundaries are obtained. Relation for calculating the contribution of interaction between the adsorbed monolayers and their images to the film disjoining pressure is derived. Numerical estimates of the disjoining pressure arising due to aforementioned interactions are made.     

Review of the State of the Art in Studying Adhesion Phenomena at Interfaces of Solids with Solid and Liquid Aqueous Media

Colloid Journal - Ice adhesion plays an important role in the operation of technical structures and equipment in the open atmosphere, where the accumulation of aqueous precipitates may threaten the...     

High quality YBCO superconductive thin films fabricated by laser molecular beam epitaxy

High quality YBa₂.Cu₃O_{6 +x}(YBCO) superconductive thin films have been fabricated on the SrTiO₃(100) substrate using laser molecular beam epitaxy (laser-MBE). The active oxygen source was used, which made the necessary ambient oxygen pressure be 2–3 orders lower than that in pulsed laser deposition (PLD). T_c0 is 85–87 K, and J_c, 1.0 × 10⁶ A/cm². Atomic force microscopy (AFM) measurements show that no obvious particulates can be observed and the root mean square roughness is 7.8 nm. High stability DC superconducting quantum interference devices (DC-SQUID) was fabricated using this YBCO thin film.     

电化学发光新体系及其在原位、在线、实时监测家兔血液铜代谢过程中的应用

报道了在碱性条件下,荧光素类化合物在铂阳极表面有电化学发光,同时电化 学发光也存在重原子效应。考察了电位、pH和加入表面活性剂等反应条件变化对这 一电化学发光体系的影响,提出了这类电化学发光的作用机理;同时发现在无机离 子中仅有铜（II）离子对电化学发光有较强的增敏作用,从而建立了高选择性的测 定铜的新方法,并结合微透析技术和在线原位电化学富集-溶出技术,用于原位、 在线、实时监测家兔血液中的铜代谢过程。