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  • 1 PPAM-Lasers Department, INFLPR-National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor blvd., Magurele, 077125, Bucharest, Romania
  • | 2 Faculty of Physics, University of Craiova, 13 AI Cuza Street, 200585, Craiova, Dolj, Romania
  • | 3 Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 23 Dumbrava Rosie Street, 010184, Bucharest, Romania
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Abstract

A newly synthesized copper-complex exhibiting nonlinear optical properties, crystalline nature, and generating interest as a material for non-linear optical applications was investigated. As thermal stability studies are indispensable before attempting any laser-assisted processing experiments, the thermal behavior of 2,2′-dihydroxy azobenzene with Cu2+ cations that are found to organize themselves as non-central symmetric crystallites, was investigated. The thin films were deposited on silicon substrates by matrix-assisted pulsed laser evaporation using a Nd:YAG laser working at 266 and 355 nm. Thermal analysis of the bulk compound indicates a higher thermal stability in argon flow when compared to the air atmosphere; as well, since, the adhesion of the compound onto the substrate enhances the bonding, the thermal stability of the Cu complex increases. Fourier transform infrared spectroscopy, atomic force microscopy, scanning electron microscopy, spectroscopic ellipsometry, and ultraviolet–visible spectroscopy investigations were also performed.

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