+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Defect coalescence in spherical nematic shells



Defect coalescence in spherical nematic shells



Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 86(3 Pt 1): 030702



We study coalescence of topological defects in nematic liquid crystals confined to spherical shells using both experiments and computer simulations. We observe that the four s=+1/2 defects that are present due to topological constraints imposed by the spherical geometry coalesce by pairs after changing the molecular orientation at the outer surface from tangential to perpendicular; the result is the formation of two single s=+1 defects. It is noteworthy that the speed of the coalescence process is peaked when the defects are at opposite points on the equator of the shell; this maximum results from the thickness inhomogeneity of the shells.

(PDF emailed within 0-6 h: $19.90)

Accession: 052465751

Download citation: RISBibTeXText

PMID: 23030858

DOI: 10.1103/PhysRevE.86.030702


Related references

Nematic textures in spherical shells. Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 74(2 Pt 1): 021711, 2006

Nematic-smectic transition in spherical shells. Physical Review Letters 106(24): 247802, 2011

Spherical nematic shells with a threefold valence. Physical Review. E 94(1-1): 012703, 2016

Geodesic defect anchoring on nematic shells. Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 86(2 Pt 1): 020703, 2012

Simulating defect textures on relaxing nematic shells. Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 89(5): 052504, 2015

Novel defect structures in nematic liquid crystal shells. Physical Review Letters 99(15): 157801, 2007

Tuning the defect configurations in nematic and smectic liquid crystalline shells. Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences 371(1988): 20120258, 2013

Defect trajectories in nematic shells: role of elastic anisotropy and thickness heterogeneity. Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 86(2 Pt 1): 020705, 2012

Defect structure of a nematic liquid crystal around a spherical particle: adaptive mesh refinement approach. Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 65(4 Pt 1): 041709, 2002

Rigid linear particles confined on a spherical surface: phase diagram of nematic defect states. Journal of Chemical Physics 141(24): 244901, 2015

Nematic liquid crystals on spherical surfaces: control of defect configurations by temperature, density, and rod shape. Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 86(1 Pt 1): 011709, 2013

Nematic liquid crystal around a spherical particle: Investigation of the defect structure and its stability using adaptive mesh refinement. European Physical Journal. E, Soft Matter 13(1): 87-98, 2004

Monte Carlo simulations of nematic and chiral nematic shells. Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 91(1): 012502, 2015

Coalescence driven by line tension in thin nematic films. Physical Review Letters 104(22): 227801, 2010

Voltage-induced defect mode coupling in a one-dimensional photonic crystal with a twisted-nematic defect layer. Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 85(1 Pt 1): 011705, 2012