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Nataliya V. Kamanina^1,2,3*, Andrey S. Toikka^2,3, Svetlana V. Likhomanova^1,3, Yuliya A. Zubtcova^1,3, Yaroslav V. Barnash^2,3, Pavel V. Kuzhakov^1,3

Author affiliations
¹Laboratory for Photophysics of media with nanoobjects at Vavilov State Optical Institute Saint-Petersburg, Russia
²Saint-Petersburg Electrotechnical University (“LETI”), Saint-Petersburg, Russia
³SRC "Kurchatov Institute" – Petersburg Institute of Nuclear Physics, Gatchina, Russia
*Corresponding author: nvkamanina@mail.ru

Abstract
In this paper, we continue to consider the effect of carbon nanoparticles introduced into the volume of organic polyimide-based compositions on the surface relief of organic thin films. The type and concentration of nanoparticles used for organic sensitization are changed. In addition to the previously proposed testing of surface wetting with water droplets, the change of contact angle using the liquid crystal droplets has been established. The influence of nanostructure framework on the surface relief of model organic matrices has been confirmed. For the first time, the wetting angle of liquid crystal droplets on the surface of a sensitized polyimide matrix using namely the carbon nanoparticles is established. The angle value is found to be close to the limit. The discussed dependencies suggest the expansion of the application scope of optoelectronic devices for display, laser and biomedical technologies.

Keywords: organic materials, polyimide, sensitization, carbon nanoparticles, liquid crystals, surface relief, wetting phenomena