+ 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

Geodesic defect anchoring on nematic shells



Geodesic defect anchoring on nematic shells



Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 86(2 Pt 1): 020703



Nematic shells are colloidal particles coated with nematic liquid crystal molecules, which may freely glide and rotate on the colloid's surface while keeping their long axis on the local tangent plane. Molecular dynamics simulations on a nanoscopic spherical shell indicate that under appropriate adhesion conditions for the molecules on the equator, the equilibrium nematic texture exhibits at each pole a pair of +1/2 defects so close to one another to be treated as one +1 defect. Spirals connect the polar defects, though the continuum limit of the interaction potential would not feature any elastic anisotropy. A molecular averaging justifies an anchoring defect energy that feels the geodesics emanating from the defect. All our observations are explained by such a geodesic anchoring, which vanishes on flat manifolds.

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

Accession: 053403085

Download citation: RISBibTeXText

PMID: 23005713

DOI: 10.1103/PhysRevE.86.020703


Related references

Defect coalescence in spherical nematic shells. Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 86(3 Pt 1): 030702, 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

Direct nanomechanical measurement of an anchoring transition in a nematic liquid crystal subject to hybrid anchoring conditions. Langmuir 28(22): 8371-8383, 2012

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

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

The effect of anchoring on the nematic flow in channels. Soft Matter 11(23): 4674-4685, 2015

Oblique anchoring at a free nematic surface. Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics 53(1): 706-713, 1996

Biaxiality at the isotropic-nematic interface with planar anchoring. Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 80(4 Pt 1): 041705, 2009

Anchoring strength of a lyotropic nematic liquid crystal. Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics 51(6): R5204-R5207, 1995

Azimuthal and zenithal anchoring of nematic liquid crystals. Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 68(3 Pt 1): 031704, 2003

Anchoring of a nematic liquid crystal on a wettability gradient. Langmuir 22(23): 9753-9759, 2006

Theory and simulation of the nematic zenithal anchoring coefficient. Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 65(2 Pt 1): 021704, 2002