Now showing items 1-5 of 5

    • Impact of an Irreversibly Adsorbed Layer on Local Viscosity of Nanoconfined Polymer Melts 

      Lurio, Laurence; Koga, Tadanori; Jiang, N.; Gin, P.; Endoh, M.K.; Narayanan, S.; Sinha, S.K. (American Physical Society, 2011)
      We report the origin of the effect of nanoscale confinement on the local viscosity of entangled polystyrene (PS) films at temperatures far above the glass transition temperature. By using marker x-ray photon correlation ...
    • Measurement of the Interior Structure of Thin Polymer Films Using Grazing Incidence Diffuse X-Ray Scattering 

      Lurio, Laurence; Mukhopadhyay, M.K.; Jiang, Z.; Jiao, X.; Sprung, Michael; DeCaro, Curt; Sinha, S.K. (American Physical Society, 2010)
      A method is developed for calculating the small-angle x-ray scattering originating from within the interior of a thin film under grazing incidence illumination. This offers the possibility of using x-ray scattering to ...
    • Reduced Viscosity of the Free Surface in Entangled Polymer Melt Films 

      Lurio, Laurence; Koga, Tadanori; Li, C.; Endoh, M.K.; Koo, J.; Rafailovich, M.; Narayanan, S.; Lee, D.R.; Sinha, S.K. (American Physical Society, 2010)
      By embedding ‘‘dilute’’ gold nanoparticles in single polystyrene thin films as ‘‘markers’’, we probe the local viscosity of the free surface at temperatures far above the glass transition temperature (Tg). The technique ...
    • Substrate Suppression of Thermal Roughness in Stacked Supported Bilayers 

      Lurio, Laurence; Berry, Justin D.; DeCaro, Curt M.; Chen, Gang; Jiang, Zhang; Ma, Yikong; Parikh, Atul N.; Sandy, Alec R.; Sinha, Sunil; Tayebi, Lobat (American Physical Society, 2011)
      We have fabricated a stack of five 1,2-dipalmitoyl-sn-3-phosphatidylethanolamine (DPPE) bilayers supported on a polished silicon substrate in excess water. The density profile of these stacks normal to the substrate was ...
    • Thickness Induced Structural Changes in Polystyrene Films 

      Lurio, Laurence; Mukhopadhyay, M.K.; Jiao, X.; Jiang, Z.; Stark, J.; Sprung, M.; Narayanan, S.; Sandy, A.R.; Sinha, S.K. (American Physical Society, 2008)
      Changes to the structure of polystyrene melt films as measured through the spectrum of density fluctuations have been observed as a function of film thickness down to the polymer radius of gyration (Rg). Films thicker ...