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

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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

Fingerprint

petals
Surface structure
stainless steels
Stainless steel
Lasers
Contact angle
lasers
Ultrashort pulses
Hysteresis
Wetting
Surface roughness
wettability
Processing
surface roughness
hysteresis
Costs

Keywords

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

Cite this

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title = "Creating Superhydrophobic Surface Structures Via the Rose Petal Effect on Stainless Steel with a Picosecond Laser",
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.",
keywords = "Picosecond laser, stainless steel, laser induced periodic surface structures (LIPSS), wettability, contact angle, superhydrophobicity, rose petal effect, wetting regime transition",
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issn = "0898-1507",
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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

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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 -