Abstract
We proposed a novel method for the morphological shape change of dimpled wrinkles using water-soluble powders to modify surface characteristics. Ultraviolet (UV)-curable resin was coated thinly on an aluminum plate and three water powders with 70, 100 and 200 μm in average diameters were dredged on each resin-layered plate. After a short exposure in UV light for less than 15 s on the plate and subsequent thermal curing, we observed microscale wrinkles with diverse morphological structures. Next, dimpled wavy structures were observed by dissolving water-soluble powders on the skin using water rinsing. Through experimental results, wrinkle morphology was affected by the powder size and resin layer thickness. Using this simple approach, various types of dimpled wavy structures can be realized and may be utilized in engineering applications, such as hydrophobicity control.
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