title: Formation of regular nanoscale undulations on a thin polymer film imprinted by a soft mold.
abstract: We observed the formation of regular nanoscale undulations on a polystyrene film when imprinted by a soft poly(dimethylsiloxane) mold above the polymer's glass transition temperature. The shape of the wave was reminiscent of a buckling wave frequently observed for a metal film supported on an elastomeric substrate. We derived a simple theoretical model based on an anisotropic buckling of the polymer film rigidly bound to a substrate, which agrees well with the experiment.
authors.affiliation: School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Korea. sky4u@snu.ac.kr
authors.forename: Kahp Y
authors.initials: KY
authors.lastname: Suh
authors.forename: Soon Min
authors.initials: SM
authors.lastname: Seo
authors.forename: Pil J
authors.initials: PJ
authors.lastname: Yoo
authors.forename: Hong H
authors.initials: HH
authors.lastname: Lee