Key words: polymer nanocomposite, supercritical carbon dioxide, quantum dots, photoluminescence, polytetrafluoroethylene, low-density polyethylene, diffusion embedding
Luminescence of composites based on quantum dots CdSe embedded into low-density
polyethylene (LDPE) and polytetrafluoroethylene (PTFE) powders using supercritical
carbon dioxide is studied. It is shown that thermal treatment of the resulting powders
in air in the case of LDPE causes the CdSe photoluminescence band shift to shorter
wavelengths, but in the case of PTFE — to longer wavelengths with simultaneous
decrease of integral luminescence intensity. The behavior of photoluminescence bands
under near UV radiation in both cases is determined by photo-oxidation processes
on the CdSe nuclei.
doi:10.1134/S1990793116070174