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20 August 2020 Direct observation of molecular alignment behavior by scanning wave photopolymerization
Atsushi Shishido
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Proceedings Volume 11472, Liquid Crystals XXIV; 114720R (2020) https://doi.org/10.1117/12.2569083
Event: SPIE Organic Photonics + Electronics, 2020, Online Only
Abstract
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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Atsushi Shishido "Direct observation of molecular alignment behavior by scanning wave photopolymerization", Proc. SPIE 11472, Liquid Crystals XXIV, 114720R (20 August 2020); https://doi.org/10.1117/12.2569083
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KEYWORDS
Photopolymerization
Anisotropy
Diffusion
Liquid crystals
Molecules
Optical lithography
Photomicroscopy
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