- Tytuł:
- Positron annihilation in liquid crystals
- Autorzy:
-
Dryzek, E.
Juszyńska-Gałązka, E. - Powiązania:
- https://bibliotekanauki.pl/articles/148118.pdf
- Data publikacji:
- 2015
- Wydawca:
- Instytut Chemii i Techniki Jądrowej
- Tematy:
-
liquid crystals
positron annihilation
phase transitions - Opis:
- Positron annihilation studies of liquid crystals are reviewed with particular reference to thermotropic liquid crystals with rod-like molecules. The studies of compounds exhibiting smectic A or smectic E phases indicate that local arrangement of dipole molecules play an important role because high electron density at the end group of molecules can influence substantially formation and annihilation of positronium. The obtained ortho-positronium lifetimes in these phases can be explained by antiparallel pairing of molecules in case of the smectic A phase or a structure with a nanosegregation of alkyl chains and others parts of molecules into sublayers and liquid-like state of alkyl chains in case of the smectic E phase.
- Źródło:
-
Nukleonika; 2015, 60, No. 4, part 1; 703-708
0029-5922
1508-5791 - Pojawia się w:
- Nukleonika
- Dostawca treści:
- Biblioteka Nauki
Artykuł