Three-Dimensional Soft Material Micropatterning via Grayscale Photolithography for Improved Hydrophobicity of Polydimethylsiloxane (PDMS)

Autor:	Intan Sue Liana Abdul Hamid, Beh Khi Khim, Mohammad Faiz Mohamed Omar, Khairu Anuar Mohamad Zain, Nuha Abd Rhaffor, Sofiyah Sal Hamid, Asrulnizam Abd Manaf
Rok vydání:	2021
Předmět:	grayscale lithography hydrophobic micro 3D structure droplet contact angle Control and Systems Engineering Mechanical Engineering TJ1-1570 Mechanical engineering and machinery Electrical and Electronic Engineering Article
Zdroj:	Micromachines Micromachines, Vol 13, Iss 78, p 78 (2022) Micromachines; Volume 13; Issue 1; Pages: 78
ISSN:	2072-666X
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7fbd3ebd438a4990bbabb79c8302ebc8 https://pubmed.ncbi.nlm.nih.gov/35056243 Zobrazit plný text záznamu