title: Enhancement of polymer endurance to UV light by incorporation of semiconductor nanoparticles.
abstract: Improvement of polyvinyl alcohol stability against ultraviolet (UV) illumination is achieved by introducing cadmium sulfide (CdS) nanoparticles into the polymeric matrix. Enhancement of stability is analyzed by optical characterization methods. UV protection is achieved by diminishing the probability of photo-activated formation of defects in polymer. The sources of polymer protection are the lowering of the efficiency of polymer excitation via partial absorption of incident light by the embedded nanoparticles as well as the de-excitation of the macromolecules that have already absorbed UV quanta via energy drain to nanoparticles. Within the nanoparticles, the energy is either dissipated by conversion to the thermal energy or reemitted as visible-range photoluminescence quanta.
authors: V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine, 45, Pr. Nauky, Kiev, 03028 Ukraine.
authors: Galyna
authors: G
authors: Rudko
authors: V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine, 45, Pr. Nauky, Kiev, 03028 Ukraine.
authors: Andrii
authors: A
authors: Kovalchuk
authors: Department of Biophysics and Medical Informatics, Bukovinian State Medical University, 42 Kobylyanska st., 58000 Chernivtsi, Ukraine.
authors: Volodymyr
authors: V
authors: Fediv
authors: Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden.
authors: Weimin M
authors: WM
authors: Chen
authors: Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden.
authors: Irina A
authors: IA
authors: Buyanova
keywords: CdS; Nanocomposite; Nanoparticles; PVA; Polymer; Shielding