Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/13259
Title: Alignment of hexatic langmuir monolayers under shear
Author: Ignés i Mullol, Jordi
Schwartz, Daniel K.
Keywords: Pel·lícules fines
Reologia
Química de superfícies
Thin films
Rheology
Surface chemistry
Issue Date: 2000
Publisher: American Physical Society
Abstract: We have studied the structural changes that fatty acid monolayers in the Ov phase undergo when a simple shear flow is imposed. A strong coupling is revealed by the changes in domain structure that are observable using Brewster angle microscopy, suggesting the possibility of shear alignment. The dependence of the alignment on the molecular polar tilt proves that the mechanism is different than in nematic liquid crystals. We argue that the degenerate lattice symmetry lines of the underlying pseudohexagonal lattice align in the flow direction, and we explain the observed alignment angle using geometrical arguments.
Note: Reproducció digital del document proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevLett.85.1476
It is part of: Physical Review Letters, 2000, vol. 85, núm. 14, p. 1476-1479
URI: http://hdl.handle.net/2445/13259
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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