| Autor: |
Frunza, S., Frunza, L., Schönhals, A., Frunza, S., Frunza, L., Schönhals, A. |
| Zdroj: |
Journal de Physique IV - Proceedings; September 2000, Vol. 10 Issue: 1 pPr7-115-Pr7-118, 1157112p |
| Abstrakt: |
The molecular dynamics of the liquid crystals 8CB and 5CB confined to the mesopores of the molecular sieve Al-MCM-41 with pore diameter less than 2.5 nm was investigated by broadband dielectric spectroscopy. The phase transitions of the liquid crystal cannot be detected for the molecules confined to the pores. Moreover it has been found that even about 20 K below the melting temperature of the bulk material a relaxation process occurs for molecules confined to the mesoporous material which does not exist in the bulk liquid crystal state. The temperature dependence of the relaxation rate of that process obeys a Vogel-Fulcher-Tammann law. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
