- Tytuł:
- Dielectric Properties of Compounds Creating Dual-Frequency Nematic Liquid Crystals
- Autorzy:
-
Mrukiewicz, M.
Perkowski, P.
Garbat, K.
Dąbrowski, R.
Parka, J. - Powiązania:
- https://bibliotekanauki.pl/articles/1399014.pdf
- Data publikacji:
- 2013-12
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
77.22.Gm
77.84.Nh
61.30.-v - Opis:
- In this paper we report how dielectric spectroscopy can help in creating of dual-frequency nematic liquid crystals. Dual-frequency nematic liquid crystals is new class of liquid crystal materials. Such mixture is usually formed by a combination of many components (even more than 10), which can be split into two groups: molecules having large transverse dipole moment and molecules with a large longitudinal dipole moment. The behavior of a base (parent) mixture, functional admixtures and final dual-frequency nematic liquid crystals mixture is investigated by dielectric spectroscopy in wide frequency (100 Hz-10 MHz) and temperature ranges. This allows us to find out why the dual-frequency liquid crystal has an important feature: positive and negative dielectric anisotropy at different frequencies. We present parameters of molecular motions around short (S-mode) and long (L-mode) molecular axes observed in investigated materials and discuss how the creation of final dual-frequency nematic liquid crystals mixture can modify molecular relaxations.
- Źródło:
-
Acta Physica Polonica A; 2013, 124, 6; 940-945
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł