Analogue Orientation Control of a Carbon Fibre in a Nematic Liquid Crystal.

Abstract:

:A carbon fibre is a rod-like microstructure, the longitudinal axis of which is aligned with the orientation of the director in a nematic liquid crystal. A nematic liquid crystal with negative dielectric anisotropy is mixed with carbon fibres. By applying an electric field perpendicular to the director, the carbon fibres tend to rotate in response to the electric field, and the directors around the carbon fibres tends to suppress the rotation. We control individual carbon fibres to obtain an expected orientation by handling the competition of two actions. The carbon fibre barely reacts in a small electric field. Meanwhile, when the threshold electric field is exceeded, the carbon fibre rotates with a steep gradient in the direction of the electric field. The change in the rotation shows little hysteresis. As the length of the carbon fibre is increased, the threshold electric field decreases. We analysed the above process with a theoretical model considering the response of the carbon fibre and liquid crystal. This study shows the possibility of accurate analogue orientation control of individual rod-like microstructures.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Lee JY,Lev B,Kim JH

doi

10.1038/s41598-019-56594-6

subject

Has Abstract

pub_date

2019-12-27 00:00:00

pages

20223

issue

1

issn

2045-2322

pii

10.1038/s41598-019-56594-6

journal_volume

9

pub_type

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