Impact of dendritic interface modifiers on phase behavior of polyvinylcarbazol-CdSe/ZnS nanocomposite films
In: Colloid and polymer science (Print), Jg. 292 (2014), Heft 3, S. 707-713
Online
academicJournal
- print, 32 ref
Zugriff:
The phase behavior of mixtures of poly(9-vinylcarbazol) (PVK) and CdSe/ZnS quantum dots (QDs) were studied depending on the nature of the surfactant used as QDs shell, namely, native surfactant (NS) originated from the QDs synthesis, and specially designed two-component interface modifiers comprising of dendritic phosphonic acids possessing alkyl- or cyano-terminal groups and hexyl phosphonic acid as a cosurfactant. It is shown, that the nature of interface modifier dramatically influence on distribution of QDs in the nanocomposite film. Thus, both the native surfactant and alkyl-containing dendritic interface modifiers favors to phase segregation of QDs in the resulting nanocomposites where two-dimensional aggregates are localized near-surface layer of the PVK film. In contrast, the cyano-containing dendritic interface modifier provides the homogeneous QDs distribution through the film thickness. We determined that the concentration quenching of QDs photoluminescence is observed for PVK/ QD(NS) film. For PVK films containing QDs grafted with dendritic surfactants, the luminescent intensities increase vs QD concentration up to 80-85 wt%.
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Impact of dendritic interface modifiers on phase behavior of polyvinylcarbazol-CdSe/ZnS nanocomposite films
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Autor/in / Beteiligte Person: | MATVIENKO, Oksana O ; PRODANOV, Maksym F ; GOROBETS, Nikolay Yu ; VASHCHENKO, Valerii V ; VOVK, Oleh M ; BABAYEVSKAYA, Nataliya V ; SAVIN, Yuri N |
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Zeitschrift: | Colloid and polymer science (Print), Jg. 292 (2014), Heft 3, S. 707-713 |
Veröffentlichung: | Heidelberg: Springer, 2014 |
Medientyp: | academicJournal |
Umfang: | print, 32 ref |
ISSN: | 0303-402X (print) |
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