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The fabrication of ultra‐water‐repellent poly(ethylene terephthalate) substrates has been achieved by a two‐step plasma process. First, appropriate nanotextures are prepared on the substrate through an oxygen plasma treatment, and then a hydrophobic layer is coated on the nanotextured surfaces with plasma‐enhanced CVD using tetramethylsilane. The resulting modified substrates show ultra‐water‐repellent characteristics with a water contact angle greater than 150° (Figure).
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Teshima et al. (2004) studied this question.
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