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Topological Formations in Chiral Nematic Droplets (Paperback, Softcover reprint of the original 1st ed. 2018)
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Topological Formations in Chiral Nematic Droplets (Paperback, Softcover reprint of the original 1st ed. 2018)
Series: Springer Theses
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Total price: R3,024
Discovery Miles: 30 240
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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.
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