| 초록 |
We developed free-standing and circular-polarized mirrors with a broad reflection bandwidth using sequential coating and subsequent photopolymerzation. Cholesteric liquid crystal (CLC) paints were prepared by considering not only the coating viscoelasticity but the intrinsic chirality. The helical pitch of the CLC paints were controlled by the concentration of the chiral reactive mesogen in the acrylate-based reactive mesogen. By stabilizing with photopolymerization, the CLC film showed excellent mechanical, thermal and chemical stabilities for fabricating patterned optical objects. The sequentially stacked CLC films had finely tuned helical pitch and it is confirmed by SEM observations and X-ray diffraction patterns. The CLC film reflected visible light over the whole visible wavelength region. This work was supported by the BK21 Plus, the BRL 2015042417, and Mid-Career Researcher Program (2016R1A2B2011041). |
