Reverse-mode polymer dispersed liquid crystal films prepared by patterned polymer walls |
| |
| Authors: | Huihui Wang He Gong Ping Song Jian Sun Shumeng Guo |
| |
| Institution: | 1. Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People’s Republic of China;2. Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, People’s Republic of China |
| |
| Abstract: | This article proposes a methodology to prepare polymer dispersed liquid crystal (PDLC) films working in the reverse-mode operation, where the ion-doped nematic liquid crystals (NLCs) with negative dielectric anisotropy (Δε) were locked by polymer walls. On-state and off-state of films were controlled by an electric field. In the absence of an electric field, it appears to be transparent. In the field, the homogeneous alignment NLCs form dynamic scattering, giving rise to opaque. The effect of the cylindrical holes with different diameters of photo masks and liquid crystal Δε on the electro-optical properties and transmittance wavelength range of 400–3000 nm light of samples were investigated. It was found that it exhibited very good electro-optical characteristics, high contrast ratio and excellent infrared energy-efficient of films used as switchable windows. |
| |
| Keywords: | reverse-mode polymer dispersed liquid crystal polymer walls nematic liquid crystal negative dielectric anisotropy electro-optical properties |
|
|
