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Proceedings Paper

Colloidal structures and interactions in a nematic liquid crystal
Author(s): Miha Skarabot; Miha Ravnik; Uros Tkalec; Matjaz Humar; Slobodan Zumer; Andriy Nych; Ulyana Ognysta; Vassili Nazarenko; Igor Musevic
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Paper Abstract

The interactions between different types of colloidal particles are measured and analyzed. We use these interactions to build different self-assembled microstructures, such as dimers, chains, wires, crystals and superstructures. In the experiments we have used different size, different symmetry of colloids (elastic dipoles and quadrupoles) and different way of colloidal binding (via localized defects and via entangled defects). We use optical tweezers for directed selfassembly of colloidal particles. Special attention is devoted to the hierarchical superstructures of large and small particles. We show that smaller, submicron colloidal particles are trapped into the topological defect rings or loops, twisting around larger colloidal particles, which are sources of strong nematic deformations. Various possible applications are discussed, especially in photonics and metamaterials.

Paper Details

Date Published: 20 August 2009
PDF: 12 pages
Proc. SPIE 7414, Liquid Crystals XIII, 74140M (20 August 2009); doi: 10.1117/12.827981
Show Author Affiliations
Miha Skarabot, J. Stefan Institute (Slovenia)
Univ. of Ljubljana (Slovenia)
Miha Ravnik, Univ. of Ljubljana (Slovenia)
Uros Tkalec, J. Stefan Institute (Slovenia)
Matjaz Humar, J. Stefan Institute (Slovenia)
Slobodan Zumer, J. Stefan Institute (Slovenia)
Univ. of Ljubljana (Slovenia)
Andriy Nych, Institute of Physics (Ukraine)
Ulyana Ognysta, Institute of Physics (Ukraine)
Vassili Nazarenko, Institute of Physics (Ukraine)
Igor Musevic, J. Stefan Institute (Slovenia)
Univ. of Ljubljana (Slovenia)

Published in SPIE Proceedings Vol. 7414:
Liquid Crystals XIII
Iam Choon Khoo, Editor(s)

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