Related Experiment Video
Updated: Oct 6, 2025
Soft Lithographic Functionalization and Patterning Oxide-free Silicon and Germanium
Published on: December 16, 2011
Three-Dimensional Soft Material Micropatterning via Grayscale Photolithography for Improved Hydrophobicity of
Intan Sue Liana Abdul Hamid1,2,3, Beh Khi Khim3, Mohammad Faiz Mohamed Omar3
1Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat 86400, Johor, Malaysia.
Abstract:
In this present work, we aim to improve the hydrophobicity of a polydimethylsiloxane (PDMS) surface. Various heights of 3D PDMS micropillars were fabricated via grayscale photolithography, and improved wettability was investigated. Two approaches of PDMS replication were demonstrated, both using a single master mold to obtain the micropillar arrays. The different heights of fabricated PDMS micropillars were characterized by scanning electron microscopy (SEM) and a surface profiler. The surface hydrophobicity was characterized by measuring the water contact angles. The fabrication of PDMS micropillar arrays was shown to be effective in modifying the contact angles of pure water droplets with the highest 157.3-degree water contact angle achieved by implementing a single mask grayscale lithography technique.
