Photo-configurable embossed liquid crystal alignment layer with high azimuthal anchoring strength.
Opt Express
; 20(6): 6835-43, 2012 Mar 12.
Article
en En
| MEDLINE
| ID: mdl-22418566
ABSTRACT
Herein we describe a photo-alignment layer of improved azimuthal anchoring energy comparable to conventional rubbing method. In order to address the inherent low anchoring stability of photo-alignment layer, we applied embossing technique to conventional photosensitive polymer film, based on the cinnamoyl photoreactive groups, to introduce physical micro-groove effect for additional anchoring energy. From this, 2.5 × 10â»4 J/m² of azimuthal anchoring energy was achieved, which is considered as synergistic effect from both photoinduced chemical interaction and physical microgroove alignment. In this study, we conducted systematic study on change in anchoring energy as a function of both aspect ratio of embossed pattern and UV exposure dose. We also demonstrated fabrication of sophisticated multi-domain structure of LC cells and discussed theoretical interpretation through LC simulation.
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Banco de datos:
MEDLINE
Asunto principal:
Cristalización
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Cristales Líquidos
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Materiales Manufacturados
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Modelos Químicos
Idioma:
En
Año:
2012
Tipo del documento:
Article