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 length scale 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.
Revised: November 15, 2012 |
Published: November 13, 2012
Citation
Alvine K.J., Y. Dai, H.W. Ro, S. Narayanan, A. Sandy, C.L. Soles, and O.G. Shpyrko. 2012.Capillary Wave Dynamics of Thin Polymer Films over Submerged Nanostructures.Physical Review Letters 109, no. 20:Article No. 207801.PNNL-SA-84197.doi:10.1103/PhysRevLett.109.207801