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- Rudko, G.Yu, et al.
(författare)
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Optically detected magnetic resonance study of relaxation/emission processes in the nanoparticle-polymer composite
- 2019
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Ingår i: SPQEO. - Kiev, Ukraine : Natsional'na Akademiya Nauk Ukrainy * Instytut Fizyky Napivprovidnykiv. - 1605-6582. ; 22:3, s. 310-318
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Tidskriftsartikel (refereegranskat)abstract
- 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.
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