Abstract
A method of diffusion introduction of CdSe quantum dots (QDs) into polymer microparticles in supercritical carbon dioxide was proposed, implemented, and studied. Photoluminescence (PL) spectra of fine nanocomposite powders based on polymethyl methacrylate/polystyrene and CdSe QDs were measured and analyzed. Produced samples are characterized by a pronounced PL band with a general maximum at 620 nm. It was found that QD introduction into polymer microparticles by impregnation in a supercritical carbon dioxide medium efficiently stabilizes them in space and significantly increases photochemical stability of their luminescence characteristics.
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Original Russian Text © V.N. Bagratashvili, M.S. Vakshtein, Yu.S. Zavorotnyi, L.I. Krotova, A.O. Manyashin, V.K. Popov, A.O. Rybaltovskii, I.I. Taraskina, P.S. Timashev, 2010, published in Perspektivnye Materialy, 2010, No. 2, pp. 39–45.
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Bagratashvili, V.N., Vakshtein, M.S., Zavorotnyi, Y.S. et al. Fabrication of fine powder fluorescent polymer nanocomposites based on CdSe quantum dots using supercritical carbon dioxide. Inorg. Mater. Appl. Res. 1, 297–302 (2010). https://doi.org/10.1134/S2075113310040064
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DOI: https://doi.org/10.1134/S2075113310040064