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|Author(s):||Christopher L. Soles; Hyun Wook Ro; K. J. Alvine; Oleg Shpyrko; Yenling Dai; Alec Sandy; Suresh Narayanan;|
|Title:||Capillary Wave Dynamics of Thin Polymer films over Submerged Nanostructures|
|Published:||November 16, 2012|
|Abstract:||The surface dynamics of thin molten polystyrene films supported by nanoscale periodic silicon line-space gratings were investigated with X-ray photon correlation spectroscopy. Surface dynamics over these nanostructures exhibit high directional anisotropy above certain length scales, as compared to surface dynamics over flat substrates. A cutoff wavelength in the dynamics perpendicular to the grooves is observed. This marks a transition from standard over-damped capillary wave behavior to suppressed dynamics due to substrate interactions.|
|Citation:||Physical Review Letters|
|Keywords:||capillary waves, liquid films, polymers, viscosity, confinement, nanopatterning, X-ray photon correlation spectroscopy|
|Research Areas:||Polymers, Characterization, Nanomaterials, Nanomaterials, Complex Fluids, Materials Science, Measurements|
|DOI:||http://dx.doi.org/10.1103/PhysRevLett.109.207801 (Note: May link to a non-U.S. Government webpage)|