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SUMMARY:Knots and links of disclination lines in chiral nematic colloids -
  Tkalec\, U (Jozef Stefan Institute)
DTSTART:20121206T154500Z
DTEND:20121206T160500Z
UID:TALK41886@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Nematic braids formed by disclination lines entangling colloid
 al particles in nematic liquid crystal are geometrically stabilized and re
 stricted by topology. Experiments with nematic braids show rich variety of
  knotted and linked disclinations loops that can be manipulated and rewire
 d by laser light. We describe a simple rewiring formalism and demonstrate 
 how the self-linking number of nematic ribbons enables a classification of
  entangled structures. Controlled formation of arbitrary microscopic links
  and knots in nematic colloids provides a new route to the fabrication of 
 soft matter with special topological features. \n\nReferences: \n\n[1] M. 
 Ravnik\, M. karabot\, S. umer\, U. Tkalec\, I. Poberaj\, D. Babič\, N. Os
 terman\, I. Muevič\, Phys. Rev. Lett. 99\, 247801 (2007). [2] U. Tkalec\,
  M. Ravnik\, S. umer\, I. Muevič\, Phys. Rev. Lett. 103\, 127801 (2009). 
 [3] S. Čopar\, S. umer\, Phys. Rev. Lett. 106\, 177801 (2011). [4] U. Tka
 lec\, M. Ravnik\, S. Čopar\, S. umer\, I. Muevič\, Science 333\, 62 (201
 1). [5] S. Čopar\, T. Porenta\, S. umer\, Phys. Rev. E 84\, 051702 (2011)
 . [6] G. P. Alexander\, B. G. Chen\, E. A. Matsumoto\, R. D. Kamien\, Rev.
  Mod. Phys. 84\, 497 (2012).\n
LOCATION:Seminar Room 1\, Newton Institute
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