Three-dimensional soft material micropatterning via grayscale photolithography for improved hydrophobicity of Polydimethylsiloxane (PDMS)

Abdul Hamid, Intan Sue Liana and Beh, Khi Khim and Mohamed Omar, Mohammad Faiz and Mohamad Zain, Khairu Anuar and Abd Rhaffor, Nuha and Hamid, Sofiyah Sal and Abd Manaf, Asrulnizam (2022) Three-dimensional soft material micropatterning via grayscale photolithography for improved hydrophobicity of Polydimethylsiloxane (PDMS). Micromachines, 13 (78). pp. 1-13. ISSN 2072-666X

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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 photolithog�raphy, 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.

Item Type:	Article
Uncontrolled Keywords:	Grayscale lithography; hydrophobic; micro 3D structure; droplet; contact angle
Subjects:	T Technology > TP Chemical technology
Divisions:	Faculty of Electrical and Electronic Engineering > Department of Electrical Engineering
Depositing User:	Mr. Abdul Rahim Mat Radzuan
Date Deposited:	28 Mar 2022 01:46
Last Modified:	28 Mar 2022 01:46
URI:	http://eprints.uthm.edu.my/id/eprint/6849

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