Title :
Superhydrophobic surface obtained using pyramidal PTFE film fabricated on RIE etched silicon
Author :
Chul-Heum Baek ; Yao Litao ; Sung-Bo Seo ; Hwa-Min Kim ; Dae-Seung Pyo ; Pyo-Hwan Hong ; Jung-Hwa Oh ; Dae-Young Kong ; Chan-Seob Cho ; Jong-Hyun Lee ; In-Yong Eom ; Bonghwan Kim
Author_Institution :
Dept. of Electron. Eng., Catholic Univ. of Daegu, Gyeongsan, South Korea
Abstract :
We have developed a surface texturing process using a polytetrafluoroethylene coating with a pyramidal structure for obtaining superhydrophobic surfaces. In order to investigate the hydrophobic properties of the surface, we measured the contact angle and roughness values. The calculated roughness factor and root mean square roughness ranged from 2.47 to 2.6 and from 0.25 μm to 0.4 μm, respectively. The contact angle of a water droplet on the surface was greater than 150°; moreover, this angle was maintained for over 7 weeks. This observation implies that extremely low wettability is achievable on superhydrophobic surfaces.
Keywords :
contact angle; drops; hydrophobicity; polymer films; surface roughness; surface texture; water; wetting; RIE etched silicon; Si; contact angle; polytetrafluoroethylene coating; pyramidal PTFE film; pyramidal structure; root mean square roughness; superhydrophobic surface; surface roughness; surface texturing process; water droplet; wettability; Films; Rough surfaces; Silicon; Surface contamination; Surface morphology; Surface roughness; Surface treatment; PTFE; RIE; superhydrophobic surface;
Conference_Titel :
Nano/Micro Engineered and Molecular Systems (NEMS), 2013 8th IEEE International Conference on
Conference_Location :
Suzhou
Electronic_ISBN :
978-1-4673-6351-8
DOI :
10.1109/NEMS.2013.6559869
