Publications by authors named "Alexey I Tolmachev"

Article Synopsis
  • The study focuses on modifying the surface of biodegradable Mg alloys by creating porous diatomite coatings using micro-arc oxidation at voltages between 350-500 V.
  • The addition of ZrO microparticles to these coatings was investigated for its impact on their structure and properties.
  • Results showed that while the coatings were mainly composed of small pores (<1 μm), higher voltages increased larger pores (5-10 μm), and the addition of ZrO significantly improved adhesive strength by 30% and enhanced corrosion resistance dramatically.
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Two different approaches to increase intersystem crossing rates in polymethine-like molecules are presented: traditional heavy-atom substitution and molecular levels engineering. Linear and nonlinear optical properties of a series of polymethine dyes with Br- and Se-atom substitution, and a series of new squaraine molecules, where one or two oxygen atoms in a squaraine bridge are replaced with sulfur atoms, are investigated. A consequence of the oxygen-to-sulfur substitution in squaraines is the inversion of their lowest-lying ππ* and nπ* states leading to a significant reduction of singlet-triplet energy difference and opening of an additional intersystem channel of relaxation.

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