Sign reversal of the dielectric anisotropy in the chiral nematic phase of a copolysiloxane

Article abstract of DOI:10.1080/10587250127583

A chiral copolysiloxane was synthesized that exhibited an N* phase in the 9-41°C temperature range. A linear electro-optical response with the applied electric field was detected in the N* phase due to the electroclinic effect. At high electric fields, the linearity of the response was strongly affected by dielectric coupling. It was found, however, that the influence of dielectric coupling on the electro-optical response became zero at a particular temperature (T= 37°C), which was attributed to a sign reversal of the dielectric anisotropy.

Full text of DOI:10.1080/10587250127583

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Sign Reversal of the Dielectric
Anisotropy in the Chiral Nematic Phase
of a Copolysiloxane
C. Cesarino a , L. Komitov a , G. Galli a & E. Chiellini a
a Dipartimento di Chimica e Chimica Industriale , Università di
Pisa , Pisa, 56126, Italy
Published online: 29 Oct 2010.
To cite this article: C. Cesarino , L. Komitov , G. Galli & E. Chiellini (2002) Sign Reversal of the
Dielectric Anisotropy in the Chiral Nematic Phase of a Copolysiloxane, Molecular Crystals and
Liquid Crystals, 372:1, 217-227, DOI: 10.1080/10587250127583
To link to this article: http://dx.doi.org/10.1080/10587250127583
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Mol. Cryst. and Liq. Cryst., 2001, Vol. 372, pp. 217-227
# 2001 Taylorand Francis, Inc.
Sign Reversal of the Dielectric Anisotropy in the
Chiral Nematic Phase of a Copolysiloxane
C. CESARINO, L. KOMITOV§, G. GALLI and E. CHIELLINI
`
Dipartimento di Chimica e Chimica Industriale, Universita di Pisa,
56126 Pisa, Italy and
Department of Microelectronics and Nanoscience,
x
Chalmers University of Technology, 41296 Goteborg, Sweden
¨
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