Overview
- Nominated as an outstanding Ph.D. thesis by the Jožef Stefan Institute and the University of Ljubljana, Slovenia
- Reports the first observation of topological point defects with higher topological charges q = -2 and q = -3
- Provides a detailed description of the augmented fluorescent confocal polarising microscopy method, together with concrete examples to make the experimental method readily reproducible
- Includes optical microscopy images of chiral nematic droplets and a detailed analysis of the director field structures for simpler recognition in experiments
Part of the book series: Springer Theses (Springer Theses)
Access this book
Tax calculation will be finalised at checkout
Other ways to access
Table of contents (10 chapters)
-
Front Matter
Keywords
About this book
In this book Gregor Posnjak unravels the long-standing mystery of the internal director structure of chiral nematic droplets, which has been studied both experimentally and theoretically since the 1970s. To do so, he develops a new method for the reconstruction of director fields from a set of fluorescent confocal polarising microscopy images, which he augments with a simulated annealing algorithm. This allows the full reconstruction of 3D director fields, describing the ordering of the liquid crystal. The reconstruction procedure and its principles, which are applicable to other methods of studying vector fields, are explained in detail. The method is subsequently used to explore complex 3D structures in chiral nematic liquid crystal droplets with perpendicular surface anchoring. Twentyfour distinct states are identified and presented, including the layered structures of different symmetries and states with multiple topological point defects, separated by localized chiral structures. In closing, the book reports on the first observation of topological point defects with higher topological charges q = −2 and q = −3.
Authors and Affiliations
Bibliographic Information
Book Title: Topological Formations in Chiral Nematic Droplets
Authors: Gregor Posnjak
Series Title: Springer Theses
DOI: https://doi.org/10.1007/978-3-319-98261-8
Publisher: Springer Cham
eBook Packages: Physics and Astronomy, Physics and Astronomy (R0)
Copyright Information: Springer Nature Switzerland AG 2018
Hardcover ISBN: 978-3-319-98260-1Published: 27 September 2018
Softcover ISBN: 978-3-030-07475-3Published: 29 December 2018
eBook ISBN: 978-3-319-98261-8Published: 06 September 2018
Series ISSN: 2190-5053
Series E-ISSN: 2190-5061
Edition Number: 1
Number of Pages: XIII, 186
Number of Illustrations: 15 b/w illustrations, 112 illustrations in colour
Topics: Soft and Granular Matter, Complex Fluids and Microfluidics, Optical and Electronic Materials, Phase Transitions and Multiphase Systems