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Interaction of foreign macroparticles in a cholesteric liquid crystal
Jun-ichi Fukuda Ji1, Bohdan I Lev, Hiroshi Yokoyama
1Yokoyama Nano-structured Liquid Crystal Project, ERATO, Japan Science and Technology Corporation, 5-9-9 Tokodai, Tsukuba 300-2635, Japan.
Summary
We calculated the interaction energy between macroparticles in cholesteric liquid crystals. The energy depends on particle position and distance due to the liquid crystal
Area of Science:
- Soft Matter Physics
- Liquid Crystal Science
- Colloidal Systems
Background:
- Spherical macroparticles in liquid crystals interact via elastic deformation of the director field.
- Cholesteric liquid crystals exhibit unique helical structures influencing particle interactions.
Purpose of the Study:
- To calculate the interaction energy between spherical macroparticles in a cholesteric liquid crystal.
- To analyze the dependence of interaction energy on particle position and interparticle distance.
Main Methods:
- Calculation of interaction energy assuming weak anchoring on macroparticle surfaces.
- Derivation of interaction energy expression for particle dimensions smaller than the cholesteric pitch.
Main Results:
- The interaction energy in cholesteric liquid crystals is more complex than in nematic liquid crystals.
- Interaction energy exhibits dependence on both particle position and interparticle distance.
- This dependence arises from the cholesteric liquid crystal's helical structure and position-dependent local nematic ordering.
Conclusions:
- The study provides a detailed understanding of macroparticle interactions in cholesteric liquid crystals.
- The findings highlight the unique characteristics of cholesteric liquid crystals compared to nematics regarding particle interactions.
- This research contributes to the field of soft matter physics and the behavior of colloidal systems in complex fluids.