skip to main content

SciTech ConnectSciTech Connect

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

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.
Authors:
; ; ;  [1]
  1. Department of Microelectronics, Harbin Institute of Technology, Harbin, Heilongjiang, 150001 (China)
Publication Date:
OSTI Identifier:
22250886
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 4; Journal Issue: 3; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM ALLOYS; DISLOCATIONS; FABRICATION; FILMS; HYSTERESIS; MICROSTRUCTURE; SCANNING ELECTRON MICROSCOPY; SPUTTERING; SUBSTRATES; SURFACE ENERGY; SURFACES; TEFLON