Rewritable Electro-Optic Devices Based on Hierarchical Structures of Benzene-1,3,5-Tricarboxamide Macrogelators
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초록
내용
To fabricate the rewritable electro-optic devices, a benzene-1,3,5-tricarboxamide (BTA)-based supramolecule (abbreviated BTA-3AZO) was synthesized as a macrogelator. The BTA-3AZO formed three-dimensional networks in the nematic liquid crystal (NLC) host through hydrogen bonding between BTA cores and nanophase separations between BTA-3AZOs and NLCs. Due to the anisotropic optical properties of liquid crystal physical gels (LCPGs), the light scattering state could be switched to a transmittance state under a low driving voltage, compared to polymer-based systems. This lower driving voltage is attributed to the self-assembled BTA-3AZO nanocolumn networks finely dispersed in the NLC host and the good affinity between NLCs and azobenzene mesogens. The BTA-3AZO LCPGs can be utilized for remote-controllable light shutters controlled by trans-cis isomerization of the azobenzene moieties. This work was supported by the BK 21 FOUR Program and Basic Research Laboratory Program (RS-2023-00207836).