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V. V. Osipova¹, A. D. Kurilov², Y. G. Galyametdinov¹, A. A. Muravsky³, S. Kumar⁴, D. N. Chausov^2,5

Author affiliations
¹Kazan National Research Technological University,
68 Karl Marx St., Kazan, 420015, Russia
²Moscow Region State University,
24 Very Voloshinoy St., Mytishchi, 141014, Russia
³Institute of Chemistry of New Materials NAS of Belarus,
36 F. Skoriny St., Minsk, 220141, Belarus
⁴Raman Research Institute,
Sadashivanagar, Bangalore, India
⁵National University of Science and Technology "MISIS",
4 Leninsky Pr., Moscow, 119049, Russia
E-mail: valchuv@mail.ru

Abstract
The synthetic route to obtain stable composites of liquid crystal ZhK-777 with semiconductor quantum dots CdSe/CdS and CdSe/CdS/ZnS has been proposed. The dependents of fluorescence intensity of the composites on size and concentration of used quantum dots has been established. The shift of the luminescence band and decrease of its intensity has been observed both for liquid crystal and quantum dots. This effect indicates that quantum dots interaction with liquid crystals caused by a nonradiative excitation energy transfer from liquid crystal molecules to quantum dots. The dielectric spectroscopy of ZhK-777 and composites revealed that doping with quantum dots results in change of molecular relaxation frequencies in composites.

Keywords: liquid crystals, quantum dots, luminescence, dielectric spectroscopy