Details

Autor(en) / Beteiligte

• Poy, Guilhem
• Oswald, Patrick

Titel

Do Lehmann cholesteric droplets subjected to a temperature gradient rotate as rigid bodies?Electronic supplementary information (ESI) available. See DOI: 10.1039/c5sm02906f

Erscheinungsjahr

2016-02

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We performed a Fluorescence Recovery After Photobleaching (FRAP) experiment during the Lehmann rotation of cholesteric droplets in thermodynamic coexistence with the isotropic liquid and subjected to a temperature gradient. By creating and tracking bleached spots near the surface of banded droplets (in which the cholesteric helix is perpendicular to the gradient) and concentric circle droplets oriented by an electric field (in which the helix is parallel to the gradient), we found that neither type of droplet rotates as a solid. This result shows that the texture rotation is mainly due to the local director rotation. We show that Lehmann cholesteric droplets submitted to a temperature gradient never rotate as a solid, whatever their internal texture.