Fabrication of superhydrophobic Cu surfaces with tunable regular micro and random nano-scale structures by hybrid laser texture and chemical etching


Dong C., Gu Y., Zhong M., Li L., SEZER H. K. , Ma M., ...Daha Fazla

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, cilt.211, ss.1234-1240, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 211 Konu: 7
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.jmatprotec.2011.02.007
  • Dergi Adı: JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
  • Sayfa Sayıları: ss.1234-1240

Özet

Hydrophobic Cu surfaces with tunable regular microstructure and random nanostructures were fabricated by nanosecond pulsed laser texturing and chemical etching. The regular micro-scale roughness can be tuned from 5 mu m to 30 mu m Rz by nanosecond laser texturing while the ligament width and spacing of the random nano porosity about 10-50 nm can be realized by selective chemical etching. Wettability tests demonstrate that the Cu surface with this micro/nanostructural hierarchy, analogous to that of lotus leaves found in nature, is superhydrophobic with a water contact angle around 153 degrees. The random nanostructure by selective etching plays an important role for hydrophobicity in addition to the regular microstructure by nanosecond laser texturing. (C) 2011 Elsevier BM. All rights reserved.