Daniel A. Beller
Assistant Professor of Physics
University of California, Merced
In nematic liquid crystals, disclination loops encircle colloidal inclusions and microposts, and can guide elasticity-mediated colloidal organization.
In the smectic liquid crystal phase, molecules are ordered in layers of single molecule thickness. When the boundaries demand that the layers curve, equal layer spacing is accommodated through self-organized arrays of focal conic domains, which are layer geometries organized around ellipse-hyperbola defect pairs.
"Smectic flower" assemblies can be accommodated by a combination of focal conic domains and spherical patches.
In 2D colloidal crystals of cylindrical topology, separation of dislocation pairs (green+magenta sites) changes the crystal's chirality (or helical pitch), radius, and tube axis orientation.
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