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The European Physical Journal B
ISSN: 1434-6028 (printed version)
ISSN: 1434-6036 (electronic version)
Abstract Volume 2 Issue 4 (1998) pp 489-494
Buckling in a solid Langmuir monolayer: light scattering measurements and elastic model
A. Saint-Jalmes (a), F. Gallet (b)
Laboratoire de Physique Statistique de l'École Normale Supérieure (URA 1306 associée au CNRS et aux Universités Paris 6 et Paris 7.), 24 rue Lhomond, 75231 Paris Cedex 05, France
Received: 18 August 1997 / Revised: 9 December 1997 / Accepted: 29 January 1998
Abstract: Above a surface pressure threshold $\pi_{\rm c}$, we detect a buckled state in the low temperature solid phase of a phospholipid monolayer spread at the air-formamide interface. Stable ripples are observed with a Brewster angle microscope, and light scattering provides measurements $\pi_{\rm c} = 7$ mNm-1, wavelength $\Lambda\approx 16 \mu$m and amplitude $\xi$ of a few nm for the deformation. A model, coupling the monolayer thickness and elongation, and consistent with the monolayer texture, is also presented.
PACS. 46.30.Lx Static buckling and instability - 68.10.Et Interface elasticity, viscosity, and viscoelasticity - 68.55.-a Thin film structure and morphology
(a) email: jalmes@physique.ens.fr
(b) Present address: LBHP- case 7056, 2 place Jussieu, 75251 Paris Cedex 05, France.
Online publication: June 2, 1998
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