Fabrication of superhydrophobic and oleophobic Al surfaces by chemical etching and surface fluorination

Hak Jong Choi, Ju Hyeon Shin, Soyoung Choo, Sang Woo Ryu, Yang Doo Kim, Heon Lee

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)


Hierarchical Al surfaces were fabricated using three different kinds of alkaline-based chemical etching processes. The surface morphology changes to a needle-like microstructure or to nanoscale flakes on a microscale porous structure depending on the chemical solution used. These surfaceswere characterized by field-emission scanning electron microscopy, X-ray diffraction analysis, X-ray photoelectron spectroscopy, and contact angle measurements. After the hydrophobic treatment, the etched Al surface shows non-wetting properties, exhibiting a static contact angle over 150° and a dynamic contact angle less than 5° for deionized water. Oleophobic properties for diiodomethane and N,N-dimethylformamide are exhibited by all etched Al surfaces.

Original languageEnglish
Pages (from-to)76-80
Number of pages5
JournalThin Solid Films
Issue number1
Publication statusPublished - 2015


  • Aluminum
  • Chemical etching
  • Hierarchy
  • Oleophobicity
  • Superhydrophobicity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry


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