34 Crystallization Control of the Photoresponsible Diarylethene …
591
When 1o converted to 1c completely, crystals were not formed. 1o underlayer is
necessary for 1c alignment. In this study, the Al plasmonic chip promoted conversion
rate from 1o to 1c. By the comparison of the conversion rate between on the grating
pattern and on the flat metal, high conversion rate more than 60% is found to be
important condition for crystal growth. Therefore, crystal growth can be controlled
by the conversion to 1c which was promoted by the plasmonic field. At conversion
more than 60%, 1c molecules near the film surface and film edge can align on the
1o underlayer platform and gradually grow to crystals.
Acknowledgements T. K and K. T. thank Toyo Gosei for providing the photocurable resin, and
thank Ms. Eri Nakamura for helping our experiment. The present work was supported by JSPS
KAKENHI Grant Number JP15H01100 and JP26107012, Grant-in-Aid for Scientific Research on
Innovative Areas “Photosynergetics.”
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