| 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 |
| Volume: |
109 |
| Pages: |
5 pp. |
| 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: |
10.1103/PhysRevLett.109.207801 (Note: May link to a non-U.S. Government webpage) |
