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A micropattern consisting of ultrahydrophobic/ultrahydrophilic surfaces has been successfully fabricated on PET substrates via a multistep dry process. A surface nanotexture is prepared by oxygen plasma etching, and then a hydrophobic layer forms by plasma‐enhanced CVD. The surface is then exposed to vacuum UV irradiation through a honeycomb mask to produce hydroxyl groups, and the pattern is formed on the PET surface (see Figure).
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Teshima et al. (2005) studied this question.
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