التفاصيل البيبلوغرافية
| العنوان: |
Specific features of luminescence quenching in a nematic liquid crystal doped with nanoparticles. |
| المؤلفون: |
Kurochkina, M.1, Konshina, E.1 eakonshina@mail.ru, Shcherbinin, D.1 |
| المصدر: |
Optics & Spectroscopy. Oct2016, Vol. 121 Issue 4, p585-591. 7p. |
| مصطلحات موضوعية: |
*NEMATIC liquid crystals, *LUMINESCENCE quenching, *NANOPARTICLES, *PHOTOLUMINESCENCE, *SEMICONDUCTOR quantum dots, *TITANIUM dioxide, *DIELECTRIC loss |
| مستخلص: |
The change in the intensity of the photoluminescence (PL) spectra of nematic liquid crystal (NLC) composites as a function of the concentration of CdSe/ZnS semiconductor quantum dots (QDs) and TiO and ZrO nanoparticles ~5 nm in diameter has been investigated. It is shown that the PL-quenching intensity in composites with CdSe/ZnS QDs exceeds that in composites with TiO and ZrO nanoparticles. The lowfrequency spectra of these composites with a concentration of 0.1 wt %, recorded in the range of 10-10 Hz, and the content of mobile ions in them have been investigated. It is found that the dielectric loss in the composite with CdSe/ZnS QDs is much higher and the content of mobile ions is larger by a factor of 3 than in the composites with TiO and ZrO nanoparticles. It is shown that an increase in the CdSe/ZnS QD concentration in NLC composites leads to an increase in the dielectric loss and a decrease in the PL intensity. Possible mechanisms of the interaction between NLC molecules and CdSe/ZnS QDs are discussed. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
Academic Search Index |
Full Text Finder