Abstract
We have used a new method to fabricate photochromic Langmuir–Blodgett (LB)films from a pure azobenzene derivative. The films are used to photoregulatenematic liquid crystals in the host–guest cell (LCD cell). We have demonstratedthat the photoresponsiveness of the LCD cell is well determined byphototriggering the active LB surface with alternating ultraviolet and visible lightillumination. The ‘on’ and ‘off’ states of the LCD display were assigned bythe appearance of the homogeneous ‘planar’ and ‘homeotropic’ texturesrespectively. The molecular dynamics of the LCD cell are explained in terms ofa model structure depicting photoresponsiveness against illumination.
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