Topological Formations in Chiral Nematic Droplets - Springer Theses (Paperback)
  • Topological Formations in Chiral Nematic Droplets - Springer Theses (Paperback)
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Topological Formations in Chiral Nematic Droplets - Springer Theses (Paperback)

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Paperback 186 Pages / Published: 29/12/2018
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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.

Publisher: Springer Nature Switzerland AG
ISBN: 9783030074753
Number of pages: 186
Weight: 314 g
Dimensions: 235 x 155 mm
Edition: Softcover reprint of the original 1st ed. 201

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