Luminescent Composites Based on Tetrafluoroethylene Copolymer Porous Films Produced by the Diffusion Embedding of Semiconductor Nanoparticles in a Supercritical Medium
| Autor: | A. O. Rybaltovskii, S. N. Churbanov, Viktor N Bagratashvili, Peter S. Timashev, Yu. S. Zavorotny, V. M. Buznik |
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| Rok vydání: | 2018 |
| Předmět: |
Nanocomposite
Materials science Cadmium selenide Nanocrystalline silicon Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Hot pressing 01 natural sciences Supercritical fluid 0104 chemical sciences chemistry.chemical_compound chemistry Tetrafluoroethylene Physical and Theoretical Chemistry Composite material 0210 nano-technology Luminescence |
| Zdroj: | Russian Journal of Physical Chemistry B. 12:1112-1119 |
| ISSN: | 1990-7923 1990-7931 |
| DOI: | 10.1134/s1990793118070102 |
| Popis: | A method for creating film composites based on a new material—a fibrous copolymer of tetrafluoroethylene and vinylidene fluoride—using the diffusion embedding of ready-made nanoparticles into a porous matrix in a supercritical (SC) carbon dioxide medium is developed. The method of cold or hot pressing of impregnated porous films was used at the final stage of creation of such composites. The peculiarities of the effect of the supercritical fluid treatment of porous copolymer films on the surface structure of pressed films are discussed. Luminescent composites with semiconductor nanoparticles of cadmium selenide and nanocrystalline silicon are obtained; their radiation covers a range of 500–1000 nm. The change in the luminescence properties of the resulting nanocomposites under the action of excitation laser radiation at 405 nm is demonstrated. |
| Databáze: | OpenAIRE |
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