Creating Superhydrophobic Surface Structures Via the Rose Petal Effect on Stainless Steel with a Picosecond Laser

Research output: Contribution to journalArticle

2 Citations (Scopus)
70 Downloads (Pure)

Abstract

A sub-five picosecond laser was used to create a range of surface structures on stainless steel. The stainless steel exhibited a transition in surface from laser-induced periodic surface structures (LIPSS), of the order of 1 µm, to grains via a LIPSS/mountainous double structure. The wettability of the stainless steel surface was characterized by measuring the contact angle and was observed to have changed from a hydrophilic surface (63.6°) to a superhydrophobic one (160.0°) due to the laser processing. This equated to an increase in contact angle of approximately 100.0°. This has been attributed to the creation of hierarchical surface structures that exhibit the rose petal effect. Additionally the contact angle hysteresis and the surface roughness have been measured and characterized. The use of a picosecond laser to generate such surfaces demonstrates a viable, low-cost alternative to using a femtosecond laser.
Original languageEnglish
Pages (from-to)125-134
Number of pages9
JournalLasers in Engineering
Volume37
Issue number1-3
Publication statusPublished - 2017

Keywords

  • Picosecond laser
  • stainless steel
  • laser induced periodic surface structures (LIPSS)
  • wettability
  • contact angle
  • superhydrophobicity
  • rose petal effect
  • wetting regime transition

Fingerprint Dive into the research topics of 'Creating Superhydrophobic Surface Structures Via the Rose Petal Effect on Stainless Steel with a Picosecond Laser'. Together they form a unique fingerprint.

  • Cite this