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Reconfigurable knots and links in chiral nematic colloids | | Uroš Tkalec
; Miha Ravnik
; Simon Čopar
; Slobodan Žumer
; Igor Muševič
; | | Date: |
8 Jul 2011 | | Abstract: | Tying knots and linking microscopic loops of polymers, macromolecules, or
defect lines in complex materials is a challenging task for material
scientists. We demonstrate the knotting of microscopic topological defect lines
in chiral nematic liquid crystal colloids into knots and links of arbitrary
complexity by using laser tweezers as a micromanipulation tool. All knots and
links with up to six crossings, including the Hopf link, the Star of David and
the Borromean rings are demonstrated, stabilizing colloidal particles into an
unusual soft matter. The knots in chiral nematic colloids are classified by the
quantized self-linking number, a direct measure of the geometric, or Berry’s,
phase. Forming arbitrary microscopic knots and links in chiral nematic colloids
is a demonstration of how relevant the topology can be for the material
engineering of soft matter. | | Source: | arXiv, 1107.1619 | | Services: | Forum | Review | PDF | Favorites | |
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