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Published on: April 17, 2018
Stable nematic droplets with handles
Ekapop Pairam1, Jayalakshmi Vallamkondu, Vinzenz Koning
1School of Physics, Georgia Institute of Technology, Atlanta, GA 30332, USA.
Summary
Researchers stabilized nematic droplets using a yield-stress material, revealing persistent twisted director configurations and new defect structures. This work advances understanding of liquid crystal elasticity and topological constraints.
Area of Science:
- Soft Matter Physics
- Liquid Crystal Science
- Materials Science
Background:
- Nematic droplets are susceptible to surface tension-driven instabilities.
- Understanding defect structures in liquid crystals is crucial for their applications.
Purpose of the Study:
- To stabilize nematic droplets against instabilities.
- To investigate the resulting complex nematic textures and defect structures.
- To explore the interplay between topological constraints and liquid crystal elasticity.
Main Methods:
- Stabilization of nematic droplets using a yield-stress outer fluid.
- Experimental observation of nematic textures and defect formation.
- Computer simulations to analyze director configurations and elastic free energy.
Main Results:
- A persistent twisted configuration of the nematic director was observed.
- Saddle-splay energy was found to screen twisting energy in toroidal droplets, leading to mirror symmetry breaking.
- Two additional -1 surface defects per handle were identified in droplets with handles, located in saddle geometry regions.
Conclusions:
- The study successfully stabilized nematic droplets and characterized their complex internal structures.
- The findings provide insights into the role of saddle splay in liquid crystal elasticity and defect formation.
- The research contributes to the fundamental understanding of topological defects in soft matter systems.
