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Orientational coupling amplification in ferroelectric nematic colloids

Orientational coupling amplification in ferroelectric nematic colloids
Orientational coupling amplification in ferroelectric nematic colloids
We investigated the physical properties of low concentration ferroelectric nematic colloids, using calorimetry, optical methods, infra-red spectroscopy and capacitance studies. The resulting homogeneous colloids possess a significantly amplified nematic orientational coupling. We find that the nematic orientation coupling increases by ~10% for particle concentrations of 0.2%. A manifestation of the increased orientational order is that the clearing temperature of a nematic colloid increases by up to 40°C compared to the pure liquid crystal host. A theoretical model is proposed in which the ferroelectric particles induce local dipoles whose effective interaction is proportional to the square of the orientational order parameter.
liquid crystals, colloids, ferroelectricity, phase transitions
147801-[4pp]
Li, F.
8b7c4ec5-7262-415c-81d1-06b311a41480
Buchnev, O.
60cdb0d2-3388-47be-a066-61b3b396f69d
Cheon, C.I.
67628f7a-2516-4c6d-a5ac-9426e7f9af3e
Glushchenko, A.
f914a2dc-8b28-4e86-ad3a-fd11f133f84c
Reshetnyak, V.
64b4e6e8-5da2-4ce7-802f-a62c5ff18411
Reznikov, Y.
49aed37b-f52a-4a21-84c4-3862f919fdb1
Sluckin, T.J.
8dbb6b08-7034-4ae2-aa65-6b80072202f6
West, J.L
c004c7df-d06f-40c8-9f80-1abc4db2320b
Li, F.
8b7c4ec5-7262-415c-81d1-06b311a41480
Buchnev, O.
60cdb0d2-3388-47be-a066-61b3b396f69d
Cheon, C.I.
67628f7a-2516-4c6d-a5ac-9426e7f9af3e
Glushchenko, A.
f914a2dc-8b28-4e86-ad3a-fd11f133f84c
Reshetnyak, V.
64b4e6e8-5da2-4ce7-802f-a62c5ff18411
Reznikov, Y.
49aed37b-f52a-4a21-84c4-3862f919fdb1
Sluckin, T.J.
8dbb6b08-7034-4ae2-aa65-6b80072202f6
West, J.L
c004c7df-d06f-40c8-9f80-1abc4db2320b

Li, F., Buchnev, O., Cheon, C.I., Glushchenko, A., Reshetnyak, V., Reznikov, Y., Sluckin, T.J. and West, J.L (2006) Orientational coupling amplification in ferroelectric nematic colloids. Physical Review Letters, 97 (14), 147801-[4pp]. (doi:10.1103/PhysRevLett.97.147801).

Record type: Article

Abstract

We investigated the physical properties of low concentration ferroelectric nematic colloids, using calorimetry, optical methods, infra-red spectroscopy and capacitance studies. The resulting homogeneous colloids possess a significantly amplified nematic orientational coupling. We find that the nematic orientation coupling increases by ~10% for particle concentrations of 0.2%. A manifestation of the increased orientational order is that the clearing temperature of a nematic colloid increases by up to 40°C compared to the pure liquid crystal host. A theoretical model is proposed in which the ferroelectric particles induce local dipoles whose effective interaction is proportional to the square of the orientational order parameter.

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fenghua_Li_et_al_ferroparticles06preprint.pdf - Accepted Manuscript
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Published date: 5 October 2006
Keywords: liquid crystals, colloids, ferroelectricity, phase transitions

Identifiers

Local EPrints ID: 42471
URI: http://eprints.soton.ac.uk/id/eprint/42471
PURE UUID: ef6b0da6-5c96-442a-9210-bee853e73f9a
ORCID for T.J. Sluckin: ORCID iD orcid.org/0000-0002-9163-0061

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Date deposited: 11 Dec 2006
Last modified: 12 Apr 2022 01:31

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Contributors

Author: F. Li
Author: O. Buchnev
Author: C.I. Cheon
Author: A. Glushchenko
Author: V. Reshetnyak
Author: Y. Reznikov
Author: T.J. Sluckin ORCID iD
Author: J.L West

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