Investigation of hot embossing parameters on the aspect ratio of polymer nanopillars fabricated using AAO mould

Abstract Large-area nanopillar fabrication on polystyrene surface has been reported. Nanopillars are fabricated with reusable AAO mold with an ordered pore size of 80 nm. Honeycomb-ordered domain nanopores were made with different anodization parameters which further improved by pore widening. A single-step approach of hot embossing is used to make different aspect ratio nanopillars of polystyrene. Hot embossing process parameters such as embossing pressure, temperature, and holding time are optimized for contact angle as a response parameter. The moth-eye type textured nanopillars have the maximum water contact angle. The water contact angle obtained increased from 66.2° to 143° for for moth-eye type nanopillars.