Formation of regular nanoscale undulations on a thin polymer film imprinted by a soft mold.
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.
Suh
Kahp Y
KY
School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Korea. sky4u@snu.ac.kr
Seo
Soon Min
SM
Yoo
Pil J
PJ
Lee
Hong H
HH