Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 125-134 |
| Number of pages | 9 |
| Journal | Lasers in Engineering |
| Volume | 37 |
| Issue number | 1-3 |
| Publication status | Published - 2017 |
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Keywords
- Picosecond laser
- stainless steel
- laser induced periodic surface structures (LIPSS)
- wettability
- contact angle
- superhydrophobicity
- rose petal effect
- wetting regime transition
Cite this
Creating Superhydrophobic Surface Structures Via the Rose Petal Effect on Stainless Steel with a Picosecond Laser. / Lawrence, Jonathan; Waugh, David G.
In: Lasers in Engineering, Vol. 37, No. 1-3, 2017, p. 125-134.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Creating Superhydrophobic Surface Structures Via the Rose Petal Effect on Stainless Steel with a Picosecond Laser
AU - Lawrence, Jonathan
AU - Waugh, David G.
PY - 2017
Y1 - 2017
N2 - 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.
AB - 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.
KW - Picosecond laser
KW - stainless steel
KW - laser induced periodic surface structures (LIPSS)
KW - wettability
KW - contact angle
KW - superhydrophobicity
KW - rose petal effect
KW - wetting regime transition
M3 - Article
VL - 37
SP - 125
EP - 134
JO - Lasers in Engineering
JF - Lasers in Engineering
SN - 0898-1507
IS - 1-3
ER -