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Polarity-sensitive switching induced by the electric field in a self-assembled nematic system from two different achiral species of molecules
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10.1063/1.2800265
/content/aip/journal/jap/102/8/10.1063/1.2800265
http://aip.metastore.ingenta.com/content/aip/journal/jap/102/8/10.1063/1.2800265
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Chemical structure of (a) 4-octyl--cyanobiphenyl, (b) triallyl-1,3,5-triazine-1,4,6(1h,3h,5h)-trione, and (c) 1,3,5-tris-(2-hydroxy-ethyl)-[1,3,5]triazinane-2,4,6-trione. (d) Assembled unit block made from (a) and (b), and (e) the one made from (a) and (c).

Image of FIG. 2.
FIG. 2.

(Color online) (a) DSC thermogram and (b) SAXS intensity of the pure and triallyl-doped 8CB with the fingerprint textures of triallyl-doped 8CB in the inset. (c) Disclination texture of pure 8CB and (d) hydrogen-bonded 8CB with and (e) of trishydroxy.

Image of FIG. 3.
FIG. 3.

(Color online) Switching of the optic axis in the case of (a) dielectric switching and (b) polarity-sensitive switching.

Image of FIG. 4.
FIG. 4.

Electro-optical response of the (a) pure 8CB cell and (b) triallyl-doped 8CB cell. dc electric field was applied to the surface normal direction and triangular ac field was applied to the horizontal direction. The cell gap is .

Image of FIG. 5.
FIG. 5.

(Color online) Conoscopic images of triallyl-doped 8CB sample (a) under positive and (b) under negative . The dark cross represents the optic axis of the sample. The cell gap is .

Image of FIG. 6.
FIG. 6.

(Color online) (a) Polar angle of the optic axis of the triallyl-doped 8CB cell vs the vertical electric field , (b) schematic representation of the optic axis rotation, (c) polar plot of the optical transmittance for the various vertical fields, and (d) maximum (closed circle) and minimum (open circle) transmittances and their ratio (rectangle) measured at the incident angle parallel to the direction of the optic axis. The cell gap is .

Image of FIG. 7.
FIG. 7.

Second harmonic generation intensity of the triallyl-doped 8CB cell vs electric field. The cell gap is .

Image of FIG. 8.
FIG. 8.

Polarization of the pure 8CB, the triallyl-doped 8CB, and the hydrogen-bonded 8CB measured by a triangular voltage method. The cell gap was .

Image of FIG. 9.
FIG. 9.

Inverse of the response time of the triallyl-doped 8CB, the pure 8CB (in the inset), and the hydrogen-bonded 8CB (in the inset) (a) vs square value of and (b) vs and (c) response time of the samples vs . The cell gap is .

Image of FIG. 10.
FIG. 10.

Dynamics of the optical transmittance of the pure 8CB, the triallyl-doped 8CB, and the hydrogen-bonded 8CB after the removal of the electric field. The cell gap is .

Image of FIG. 11.
FIG. 11.

(Color online) (a) IR dichroism data of 8CB and triallyl molecule, (b) assembled structure, and (c) helical structure made from the unit blocks.

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/content/aip/journal/jap/102/8/10.1063/1.2800265
2007-10-26
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Polarity-sensitive switching induced by the electric field in a self-assembled nematic system from two different achiral species of molecules
http://aip.metastore.ingenta.com/content/aip/journal/jap/102/8/10.1063/1.2800265
10.1063/1.2800265
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