Mechanical & Materials Engineering, Department of
Date of this Version
Evaporation of a liquid droplet containing a thin layer of surfactants atop could generate two-dimensional buckling on surfaces. Herringbone features were produced via embedded nanoparticle beds. We assign transient surface tension as the driving force for such a phenomenon. Considering the surfactant layer as a thin elastic film, a continuum model is employed to calculate the mechanical properties of the layer. Particularly, we estimated an elastic modulus of 4 GPa for the surfactant layer, indicating rather strong mechanical properties of these small molecules when they are close packed to form supramolecules via noncovalent binding.
Published in APPLIED PHYSICS LETTERS 95, 223104 (2009); doi:10.1063/1.3269930 Copyright © 2009 American Institute of Physics. Used by permission.