A SANS study revealed the orientational stabilisation of the smectic structure by non-mesogenic polymer networks dispersed in a liquid crystal matrix. In the present experiment, hydrophobic silica particles were dispersed in liquid crystal 8CB. The Bragg reflections from smectic layers show that the alignment of the layers is perfect if the system is cooled down in a magnetic field. After annealing without magnetic field and cooling down to smectic A phase, the previous alignment of the liquid crystal is recovered. Temperature and concentration dependence of the effect has been analysed by recording the diffraction pattern from smectic layers.
- Layer orientation
- Liquid crystal
- Silica aggregates
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering