Sakai Yota, Sohn Woon Yong, Katayama Kenji
Department of Applied Chemistry, Chuo University Tokyo 112-8551 Japan
Department of Chemistry, Chungbuk National University Cheongju Chungbuk 28644 South Korea.
RSC Adv. 2020 Jun 3;10(36):21191-21197. doi: 10.1039/d0ra03465g. eCollection 2020 Jun 2.
A photo-controllable rotational motion was demonstrated for an isolated cholesteric liquid crystalline droplet in a surfactant solution. The droplet showed unidirectional rigid-body rotation with UV light irradiation and the rotational rate could be controlled by the light intensity. Furthermore, the rotational direction could be controlled by the chirality of dopants. The motion was explained by the rotational torque induced by the photo-induced gradient of chemical concentrations and/or temperature inside the droplet from the theory of the Lehmann effect, and the possible mechanisms are discussed.
在表面活性剂溶液中，已证明孤立的胆甾型液晶液滴具有光控旋转运动。该液滴在紫外光照射下呈现单向刚体旋转，且旋转速率可通过光强度控制。此外，旋转方向可由掺杂剂的手性控制。根据莱曼效应理论，这种运动是由液滴内部光致化学浓度梯度和/或温度梯度引起的旋转扭矩来解释的，并对可能的机制进行了讨论。
