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Scanning wave photopolymerization of liquid crystal monomers enables arbitrary molecular alignment patterning due to molecular diffusion induced shear stress by spatially selective polymer production. However, the molecular alignment process has not been explored because of the difficulty of measuring such non-equilibrium state. In this study, we investigated molecular alignment behavior by directly observing scanning wave photopolymerization process with a polarized micrograph equipped with a dynamic light processor. Optical anisotropy was generated along with light scanning to trigger photopolymerization, indicating that molecules are aligned parallel to the light scanning direction.
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