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|Title:||Healing of defects at the interface of nematic liquid crystals and structured Langmuir-Blodgett monolayers|
|Author:||Petit Garrido, Núria|
Trivedi, Rahul P.
Ignés i Mullol, Jordi
Claret Bonet, Josep
Sagués i Mestre, Francesc
Química de superfícies
Cristalls líquids nemàtics
Nematic liquid crystals
|Publisher:||American Physical Society|
|Abstract:||We use Langmuir-Blodgett molecular monolayers and nematic liquid crystals as model two-and three-dimensional orientationally ordered systems to study the stability and healing of topological defects at their contact interfaces. Integer-strength defects at the monolayer induce disclinations of similar strength in the nematic that, however, do not propagate deep into the bulk, but rather form single- or double-split arch-shaped loops pinned to the interface. This behavior is qualitatively independent of the far-field director orientation and involves either half-integer singular or twist-escaped unity-strength nonsingular nematic disclinations. These two defect configurations can be selected by varying sample preparation given their comparable free energy, consistently with direct probing by use of laser tweezers.|
|Note:||Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.107.177801|
|It is part of:||Physical Review Letters, 2011, vol. 107, p. 177801-177801|
|Appears in Collections:||Articles publicats en revistes (Ciència dels Materials i Química Física)|
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