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. 2017 Jul 12;7:5211. doi: 10.1038/s41598-017-05612-6

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Defect oscillations: (a) Top: Kymograph showing the time evolution of the angles α _ij. Bottom: Oscillation of the average angle 〈α〉. The blue and the green line correspond to the planar (〈α〉 = 120°) and tetrahedral (〈α〉 = 109.5°) defect configuration. (b) Snapshots showing the planar and tetrahedral defect configuration within a simulation of 1.000 particles (the four 1/2 disclinations are highlighted, the director field is shown - black lines - and the color coding corresponds to the nematic order parameter P, with minima in the four defects). The results are in excellent agreement with the experimental results in ref. 7. A video is provided in the SI.