We report the organization of polymer-dispersed liquid crystals (PDLCs) into ordered concentric rings over large areas by drying a drop of bound PDLC toluene solution (i.e., confined between a spherical lens and an indium tin oxide (ITO-coated glass substrate; sphere-on-ITO geometry). The formation of regular ring-like deposits was a direct consequence of controlled"stick-slip"cycles of three-phase contact line during the course of solvent evaporation, which was effectively regulated through the use of the sphere-on-ITO geometry. This simple approach based on controlled evaporative organization may provide a new means of processing polymer/LC mixture to produce ordered surface patterns in one step, where microscopic LCs are dispersed within the polymer matrix.
|Number of pages
|Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica
|Published - 2009
- "Stick-slip" motion
- Controlled evaporative organization
- Liquid bridge
- Polymer-dispersed liquid crystal