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Three-dimensional imaging of liquid crystal structures and defects by means of holographic manipulation of colloidal nanowires with faceted sidewalls

Published

Author(s)

David Engstrom, Martin Persson, Rahul P. Trivedi, Kristine A. Bertness, Mattias Goksor, Ivan I. Smalyukh

Abstract

We use nanowires with faceted sidewalls for mapping of the patterns of three-dimensional orientational order and defect structures. In chiral nematics, the nanowires follow the local average orientation of rod-shaped molecules. When spatially translated by use of holographic optical tweezers in three dimensions, they mediate direct nondestructive visualization of the helicoidal ground-state structures, edge and screw dislocations, and kinks, as well as enable non-contact manipulation of these defects. We probe interactions of faceted nanowires with different defects and demonstrate their spontaneous self-alignment along the cores of singular defect lines.
Citation
Soft Matter
Volume
7
Issue
13

Keywords

defect manipulation, GaN nanowires, liquid crystals, optical tweezers

Citation

Engstrom, D. , Persson, M. , Trivedi, R. , Bertness, K. , Goksor, M. and Smalyukh, I. (2011), Three-dimensional imaging of liquid crystal structures and defects by means of holographic manipulation of colloidal nanowires with faceted sidewalls, Soft Matter, [online], https://doi.org/10.1039/c1sm05170a (Accessed April 24, 2024)
Created June 2, 2011, Updated October 12, 2021