Photoresponsive azo-doped aerosil/7CB nematic liquid-crystalline nanocomposite films: the role of polyimide alignment layers of the films

INERA Workshop 2016: Membrane and Liquid Crystal Nanostructures

Hadjichristov, Georgi B.^1 ; Marinov, Yordan G.^2

Laboratory of Optics and Spectroscopy, Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee, Sofia

1784, Bulgaria^1

Laboratory of Biomolecular Layers, Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee, Sofia

1784, Bulgaria^2

关键词: Alignment layers;    Cyanobiphenyls;    Electrooptical properties;    Nano-structured;    Nematic liquids;    Photo-responsive;    Polyimide alignment layers;    Rubbed polyimide;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/780/1/012008/pdf
DOI  :  10.1088/1742-6596/780/1/012008

来源: IOP

【 摘 要 】

We studied thin films (25 m-thick) of nanomaterials composed from 3 wt.% aerosil nanospheres and the room-temperature nematic liquid crystal 4-n-heptyl cyanobiphenyl (7CB). The inclusion of 3 wt.% of the photoactive liquid crystal 4-(4′-ethoxyphenylazo)phenyl hexanoate (EPH) in the aerosil/7CB nanostructured nematics make them photoresponsive. The films had alignment layers from rubbed polyimide (PI). Our study is concentrated on the inspection of the PI-role for the photo-stimulated electro-optical properties of the considered EPH-doped aerosil/7CB nanocomposite films.