Fabrication of super-hydrophobic surfaces on aluminum alloy substrates by RF-sputtered polytetrafluoroethylene coatings

Journal Article · Sat Mar 15 00:00:00 EDT 2014 · AIP Advances

DOI:https://doi.org/10.1063/1.4868363· OSTI ID:22250886

Wang, Yang; Liu, Xiao Wei; Zhou, Zhi Ping ^[1]

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1. Department of Microelectronics, Harbin Institute of Technology, Harbin, Heilongjiang, 150001 (China)

In this work, we present a method of fabricating super-hydrophobic surface on aluminum alloy substrate. The etching of aluminum surfaces has been performed using Beck's dislocation etchant for different time to create micrometer-sized irregular steps. An optimised etching time of 50 s is found to be essential before polytetrafluoroethylene (PTFE) coating, to obtain a highest water contact angle of 165±2° with a lowest contact angle hysteresis as low as 5±2°. The presence of patterned microstructure as revealed by scanning electron microscopy (SEM) together with the low surface energy ultrathin RF-sputtered PTFE films renders the aluminum alloy surfaces highly super-hydrophobic.

• OSTI ID: 22250886
• Journal Information: AIP Advances, Vol. 4, Issue 3; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
DISLOCATIONS
FABRICATION
FILMS
HYSTERESIS
MICROSTRUCTURE
SCANNING ELECTRON MICROSCOPY
SPUTTERING
SUBSTRATES
SURFACE ENERGY
SURFACES
TEFLON