Abstract
A plasma-based methodology to fabricate oriented, spontaneously formed nano-structures on poly(dimethylsiloxane) PDMS films and stamps is described. Oxygen plasma treatment of PDMS produces spontaneously-formed wavy structures with high nano-scale amplitude and with periodicity of a few 100’snm as revealed by atomic force microscopy (AFM). We present two plasma-based methods for the fabrication of such oriented nano-structures on PDMS films and stamps, and discuss the effect of pattern dimension on periodicity. This simple oxygen plasma treatment to orient spontaneously formed nano-structures, with wavelength in the sub-micrometer range, may be used to print, for example, fine patterns of biologically active molecules onto surfaces with high spatial frequency.
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