title: Capillary wave dynamics of thin polymer films over submerged nanostructures.
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 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.
authors.affiliation: Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington, 99352, USA. kyle.alvine@pnnl.gov
authors.forename: K J
authors.initials: KJ
authors.lastname: Alvine
authors.forename: Y
authors.initials: Y
authors.lastname: Dai
authors.forename: H W
authors.initials: HW
authors.lastname: Ro
authors.forename: S
authors.initials: S
authors.lastname: Narayanan
authors.forename: A R
authors.initials: AR
authors.lastname: Sandy
authors.forename: C L
authors.initials: CL
authors.lastname: Soles
authors.forename: O G
authors.initials: OG
authors.lastname: Shpyrko
mesh_terms: D016880:Anisotropy; D018625:Microscopy, Atomic Force / Q000379:methods; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry*; D056951:Photoelectron Spectroscopy / Q000379:methods; D011137:Polystyrenes / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry; D013499:Surface Properties
chemical_list: D011137:Polystyrenes; D012825:Silicon