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Optically detected magnetic resonance study of relaxation/emission processes in the nanoparticle-polymer composite
V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine, prospect Nauky, Kyiv, Ukraine.
V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine, prospect Nauky, Kyiv, Ukraine.
V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine, prospect Nauky, Kyiv, Ukraine.
L. Pysarzhevsky Institute of Physical Chemistry, National Academy of Sciences of Ukraine, prospect Nauky, Kyiv, Ukraine.
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2019 (English)In: SPQEO, ISSN 1605-6582, Vol. 22, no 3, p. 310-318Article in journal (Refereed) Published
Abstract [en]

Two nanocomposites containing CdS nanoparticles in polymeric matrices were studied using the photoluminescence (PL) and optically detected magnetic resonance (ODMR) methods. Due to equal sizes of NPs in the composites (~5 nm) but different matrices – the oxygen-containing polymer PVA (polyvinyl alcohol) and oxygen-free polymer PEI (polyethyleneimine) – differences of nanocomposites properties are predominantly caused by different interfacial conditions. ODMR spectra have revealed five types of centers related to the PL emission – four centers involved in radiative recombination and one center related to non-radiative recombination processes. The oxygen-related interfacial center in CdS/PVA (LK1-center) and sulfur vacancy center in CdS/PEI (Vs-center) were identified.

Place, publisher, year, edition, pages
Kiev, Ukraine: Natsional'na Akademiya Nauk Ukrainy * Instytut Fizyky Napivprovidnykiv , 2019. Vol. 22, no 3, p. 310-318
Keywords [en]
CdS nanoparticles, polymer, composites, photoluminescence, optically detected magnetic resonance
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-160736DOI: 10.15407/spqeo22.03.310ISI: 000485820300006OAI: oai:DiVA.org:liu-160736DiVA, id: diva2:1357897
Available from: 2019-10-04 Created: 2019-10-04 Last updated: 2019-12-03Bibliographically approved

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Stehr, Jan EricChen, WeiminBuyanova, Irina A
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