Abstract
Plastic substrates with high-aspect-ratio surface nanostructures were fabricated by hot embossing using an anodic aluminum oxidation (AAO) membrane, and by injection molding using an AAO plate as a mold master with a very dense array of nanoholes on the surface. A new method of rapidly heating the AAO plate was used to injection-mold high-aspect-ratio nanostructures 120 nm in diameter and 1.5 µm high. The AAO plate was heated to over 150 °C to fill the nanoholes with melted polymer and then cooled to below 70 °C to release the molded nanostructures from the holes. Hot embossing was used to replicate surface nanostructures with an average diameter of 200 nm and a height of 60 µm. The contact angle and adhesive force of the hot-embossed textured surface were measured to estimate the effect of the surface nanostructures on the hydrophobicity and dry adhesiveness.
Published Version
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