Journal
PHYSICAL REVIEW LETTERS
Volume 109, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.207801
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Funding
- NIST National Research Council
- Pacific Northwest National Laboratory under DOE [DE-AC05-76RL01830]
- NSF CAREER Award [0956131]
- U.S. DOE, Office of Basic Energy Science [DE-AC02-06CH11357]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0956131] Funding Source: National Science Foundation
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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.
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