Title :

Terahertz properties of liquid crystals doped with ferroelectric BaTiO3 nanoparticles

Author(s) :

Chodorow, U. [Auteur]
Mavrona, Elena [Auteur]
Palka, N. [Auteur]
Strzezysz, O. [Auteur]
Garbat, K. [Auteur]
Saitzek, Sebastien [Auteur]
Blach, Jean-Francois [Auteur]
Apostolopoulos, Vasilis [Auteur]
Kaczmarek, Malgosia [Auteur]
Parka, J. [Auteur]

Journal title :

Liquid Crystals

Volume number :

44

Pages :

1207-1215

Publication date :

2016-12-21

HAL domain(s) :

Chimie/Chimie inorganique

English abstract : [en]

In this paper, we present the results of the terahertz measurements of liquid crystal (LC) ferroelectric BaTiO3 nanoparticles (nps) suspensions in the range of frequency from 0.3 up to 3.0 THz. Two different sol-gel methods ...
Show more >In this paper, we present the results of the terahertz measurements of liquid crystal (LC) ferroelectric BaTiO3 nanoparticles (nps) suspensions in the range of frequency from 0.3 up to 3.0 THz. Two different sol-gel methods and the harvesting technique were used to fabricate the nanoparticles. Five LC materials served as hosts for the suspensions: two single compounds: 6CHBT and 2,3′,5′-trifluoro-4-(4-pentylcyclohexyl)-4′-(trifluoromethoxy)-1,1′-biphenyl, and three mixtures: 1867, 2037 and 2020. We characterise, for the first time, the refractive indices and absorption parameters of suspensions with harvested nps in the terahertz range and show how the process of the nps’ preparation affects their response. We observed the increase of birefringence for few LC suspensions in comparison with the pure LCs. The highest increase of birefringence was for 2020 suspension with one kind of ferroelectric nps. On the other hand in most cases the addition of ferroelectric nps to LC causes the increase of its absorption in the THz range. The measurements of LCs terahertz properties by using time-pulsed spectrometer were performed.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Research team(s) :

Couches minces & nanomatériaux (CMNM)

Submission date :

2019-09-25T14:05:24Z