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Information × Registration Number 0223U002448, 0119U100357 , R & D reports Title Multifunctional nanostructured network composites based on glassy chalcogenides, chalcohalogenides and borates popup.stage_title Head Shpotyuk Oleg Iosypovych, Доктор фізико-математичних наук Registration Date 21-02-2023 Organization Vlokh Institute of Physical Optics popup.description2  The effects of intrinsic and impurity nanostructuring in covalent network glass composites (CNGNC) based on chalcogenides (GC), chalcohalides (GСH) and borates (GB) were studied, including caused by the introduction of metal modifiers (co-activators) and rare earth (RE) activators, their microstructural and optical characterization was carried out, in particular: - synthesized and prepared samples of impurity-modified CNGNC based on GC type As/Ge-S/Se-Ga, GCH GeS2-Ga2S3-CsCl, GB type Li2B4O7:(Gd,Cu,Ag), as well as LiB3O5 ceramics; - using the software package "Hyper-Chem" in the approach of cation-linked network clusters, quantum-chemical modeling was carried out "from the first principles" and the characteristics of optimized network and molecular nanoclusters in metal-activated CNGNC based on the basic systems of GС and GСH were obtained; - the effects of intrinsic (mechanochemically activated) and impurity nanostructuring in modified CNGNC based on GC As/Ge-S/Se-Ga, GCH CsCl-GeS2-Ga2S3 and GB Li2B4O7:Ag were studied; the specifics of the introduction of Ga into GC As/Ge-S/Se, CsCl into GCH GeS2-Ga2S3, Ag and Cu into GB Li2B4O7 have been established; their microstructure was investigated using X-ray diffractometry of the first sharp diffraction peak, optical spectrophotometry and positron-electron annihilation spectroscopy; - on the basis of systematic study of optical-luminescence characteristics, the technology of impurity nanostructuring was worked out and functionally optimized samples of CNGNC were prepared based on Ga-modified GC systems of the As2Se3-Te type activated by praseodymium (Pr3+), GCH 65GeS2-25Ga2S3-10CsCl activated by erbium Er3+ and Ag-modified GB Li2B4O7 activated with erbium (Er3+), thulium (Tm3+) and/or neodymium (Nd3+). A methodology for the creation of nanoinhomogeneities in CNGNC based on GC, GCH and GB with optimized functional characteristics for optoelectronics, photonics, sensor and opto-telecommunication technology was substantiated Product Description popup.authors Adamiv Volodymyr T. Boyko Vitaliy T. Dudok Taras Hrygorovych Padlyak Bohdan V. Teslyuk Igor Mykhaylovych Shpotyuk Oleh Iosypovych popup.nrat_date 2023-02-21 Close