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Capillary Wave Dynamics of Thin Polymer films over Submerged Nanostructures



Christopher L. Soles, Hyun W. Ro, K. J. Alvine, Oleg Shpyrko, Yenling Dai, Alec Sandy, Suresh Narayanan


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.
Physical Review Letters


capillary waves, liquid films, polymers, viscosity, confinement, nanopatterning, X-ray photon correlation spectroscopy


Soles, C. , Ro, H. , , K. , Shpyrko, O. , Dai, Y. , Sandy, A. and Narayanan, S. (2012), Capillary Wave Dynamics of Thin Polymer films over Submerged Nanostructures, Physical Review Letters, [online], (Accessed May 25, 2024)


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Created November 16, 2012, Updated November 10, 2018