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Dielectric behaviour of the composite system: multiwall carbon nanotubes dispersed in ferroelectric liquid crystalline material

SYSNO ASEP	0365363
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Dielectric behaviour of the composite system: multiwall carbon nanotubes dispersed in ferroelectric liquid crystalline material
Author(s)	Shukla, R.K. (IN) Raina, K.K. (IN) Hamplová, Věra (FZU-D)_{RID, ORCID, SAI} Kašpar, Miroslav (FZU-D)_RID Bubnov, Alexej (FZU-D)_{RID, ORCID, SAI}
Source Title	Phase Transitions. - : Taylor & Francis - ISSN 0141-1594 Roč. 84, 9-10 (2011), 850-857
Number of pages	8 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	ferroelectric liquid crystal ; multiwall carbon nanotube ; composite ; mesomorphic property ; dielectric spectroscopy
Subject RIV	BM - Solid Matter Physics ; Magnetism
R&D Projects	IAA100100911 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	GA202/09/0047 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	GAP204/11/0723 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z10100520 - FZU-D (2005-2011)
UT WOS	000299704600017
DOI	10.1080/01411594.2011.558300
Annotation	Ferroelectric liquid crystal - multiwall carbon nanotube (FLC-MWCNT) composite systems have been prepared by doping by MWCNT (with concentration x= 0, 0.01, 0.03, 0.10) of the liquid crystal matrix. Mesomorphic and dielectric behaviour of pure and composite systems have been studied in order to understand the effect of anisotropic impurity (MWCNTs) near the N-SmC and SmC*-Cr phase transitions. Thermo-optical studies inferring no significant change in the presence of MWCNTs. Small shift of 5 K in the clearing point has been observed for all the composite systems. Dielectric measurements reveal that the MWCNTs influenced the permittivity: composite systems show the increase in the permittivity at higher MWCNTs concentration. For pure FLC and composite systems relaxation time, relaxation frequency and dielectric strength have been evaluated and discussed. Influence of MWCNTs concentration on conductivity of composite systems has been also established.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2012

Number of the records: 1