Abstract:We report on an efficient and environmentally friendly means to modify surface properties of polymer films supported for nanoparticles. Ultrathin polystyrene (PS) films (<300 Å ), in which inorganic nanoparticles were embedded, were exposed to supercritical carbon dioxide (scCO 2 ). The swollen structure was then preserved by quickly evaporating CO 2 . X-ray reflectivity (XR) results showed that this procedure produced polymeric nanocomposite films with a low-density region of about 150 Å at the polymer/air in… Show more
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