Direct observation of rigid-body rotation of cholesteric droplets subjected to a temperature gradient

Katsu Nishiyama, Shinji Bono, Yuji Maruyama, Yuka Tabe

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Droplets of cholesteric liquid crystals rotate their helical structure when subjected to a thermal gradient perpendicular to their helical axes. Concerning the interpretation of their dynamics, there has been an argument whether the textural rotation indicates rigid-body rotation of the droplets or pure director rotation. To clarify this, we dispersed micron-size particles in a cholesteric-isotropic coexisting sample and traced their motion, and found that the particles adhering onto a cholesteric droplet rotated together with the helix in phase. This observation provided clear evidence of the rigid-body rotation of the droplet, and we also revealed an unusual hydrodynamic flow in the coexisting phase.

Original languageEnglish
Article number063601
Journaljournal of the physical society of japan
Issue number6
Publication statusPublished - 2019 Jan 1


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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