Open AccessSuperhydrophobic polytetrafluoroethylene surface obtained using reactive ion etching and duplication with polydimethylsiloxane mould
Author(s) -
Kim Bonghwan,
Kim Hwamin,
Kim Jongjae,
Cho Chan Seob,
Lee Jonghyun
Publication year - 2013
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2013.0266
Subject(s) - polydimethylsiloxane , polytetrafluoroethylene , reactive ion etching , etching (microfabrication) , materials science , composite material , layer (electronics)
The fabrication of a superhydrophobic surface by texturing of the polytetrafluoroethylene (PTFE) surface in the form of pyramidlike structures is demonstrated. In addition, the superhydrophobic surface is duplicated by using a polydimethylsiloxane (PDMS) mould. The hydrophobic properties were determined by measuring the contact angle and roughness of the PTFE surface on the pyramidal structure. The calculated roughness factor and root mean squares roughness ranged from 2.47 to 2.6 and 0.25 to 0.4 µm, respectively. The contact angle of a water droplet on the PTFE surface was greater than 150°, which was well maintained for over seven weeks. In the case of PDMS mould surface, the contact angle of a water droplet was greater than 130°.