Mechanism of superhydrophilic to superhydrophobic transition of femtosecond laser-induced periodic surface structures on titanium

Exir, Hourieh; Weck, Arnaud

doi:10.1016/j.surfcoat.2019.124931

Cited by 43 publications

(16 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many studies have reported the transition from superhydrophilicity to superhydrophobicity due to the chemisorption of polar molecules on textured surfaces upon prolonging their exposure time under ambient conditions. − To preclude the above-mentioned influence due to long-term storage, all surface wettability tests were performed on freshly prepared samples; although chemisorption can be excluded from the explanation of the superhydrophobic phenomenon observed on micropillar-textured surfaces, the change of surface chemistry indeed plays an essential role in affecting surface wettability of the shape-memory polymer (SMP). We compared the surface chemistry before and after laser processing by XPS to reveal the relation between the surface chemistry and the surface wettability in our study.…”

Section: Resultsmentioning

confidence: 99%

Laser-Induced Fast Assembly of Wettability-Finely-Tunable Superhydrophobic Surfaces for Lossless Droplet Transfer

Fan

Yan

Qian

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Rose-petal-like superhydrophobic surfaces with strong water adhesion are promising for microdroplet manipulation and lossless droplet transfer. Assembly of self-grown micropillars on shape-memory polymer sheets with their surface adhesion finely tunable was enabled using a picosecond laser microprocessing system in a simple, fast, and large-scale manner. The processing speed of the wettability-finely-tunable superhydrophobic surfaces is up to 0.5 cm2/min, around 50–100 times faster than the conventional lithography methods. By adjusting the micropillar height, diameter, and bending angle, as well as superhydrophobic chemical treatment, the contact angle and adhesive force of water droplets on the micropillar-textured surfaces can be tuned from 117.1° up to 165° and 15.4 up to 200.6 μN, respectively. Theoretical analysis suggests a well-defined wetting-state transition with respect to the micropillar size and provides a clear guideline for microstructure design for achieving a stabilized superhydrophobic region. Droplet handling devices, including liquid handling tweezers and gloves, were fabricated from the micropillar-textured surfaces, and lossless liquid transfer of various liquids among various surfaces was demonstrated using these devices. The superhydrophobic surfaces serve as a microreactor platform to perform and reveal the chemical reaction process under a space-constrained condition. The superhydrophobic surfaces with self-assembled micropillars promise great potential in the fields of lossless droplet transfer, biomedical detection, chemical engineering, and microfluidics.

show abstract

Section: Resultsmentioning

confidence: 99%

Laser-Induced Fast Assembly of Wettability-Finely-Tunable Superhydrophobic Surfaces for Lossless Droplet Transfer

Fan

Yan

Qian

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…[108][109][110][111][112] Therefore, femtosecond laser microfabrication technology has been successfully applied in controlling surface wettability, resulting in the birth of femtosecond laser-treated Janus wettability membranes. [113][114][115][116][117][118][119] Such membranes generally can be obtained via asymmetric treatment involving a femtosecond laser. In contrast to some methods of fabricating Janus membranes, such as performing asymmetric modification using chemical substances, this strategy is cleaner and more accurate.…”

Section: Femtosecond Laser Microfabricationmentioning

confidence: 99%

Recent advances in femtosecond laser-structured Janus membranes with asymmetric surface wettability

Yin

et al. 2021

Nanoscale

130

View full text Add to dashboard Cite

show abstract

“…[15] Considerable effort has been applied to the preparation of superhydrophobic surfaces on Ti alloys to enhance their corrosion resistance. [16][17][18] Chen et al [19] successfully fabricated a superhydrophobic surface with fish scale-like microstructures and micro-/nanoparticles on a titanium nickel Ti-Ni alloy substrate. The potentiodynamic polarization results showed that the as-prepared surface greatly enhanced the corrosion resistance of the Ti-Ni alloy.…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation of Hierarchical Micro‐/Nanostructure Superhydrophobic Surface with Excellent Corrosion Resistance on Ti6Al4V‐Based Composite for Nuclear Fuel Reprocessing

Tang,

Zhang

2023

Adv Eng Mater

View full text Add to dashboard Cite

To address the poor corrosion resistance of titanium matrix composites treatment vessels for nuclear fuel reprocessing in HF solution at room temperature and high concentration of HCl/HNO3 solutions at high temperature, hierarchical micro‐/nanostructure surfaces with adjustable superhydrophobicity are prepared on Ti6Al4V‐based composites by laser microengraving followed by fluorosilane modification. The effect of topography and composition of the surface on wettability is investigated. More importantly, the anticorrosion mechanism of the as‐prepared surface in the earlier corrosive solutions that can destroy the anticorrosion inert oxide film of the composite easily is investigated and elucidated for the first time. The results indicate that the surface is composed of regular parallel linear peak‐like microscale structures and radiating flocculent nanostructures. It shows excellent and stable superhydrophobicity (contact angle of 158.4°, sliding angle of 4.7°). Due to the unique solid–air–liquid interface induced by the micro‐/nanostructures and high charge transfer resistance induced by the fluorosilane film, the impedance modulus of the superhydrophobic surface can be one order of magnitude higher than that of the bare surface. The composite can be corroded hardly when immersed in 5% HCl/HNO3 solutions at 80 °C for more than 10 days and 4% HF solution at room temperature for 3 days.

show abstract

Mechanism of superhydrophilic to superhydrophobic transition of femtosecond laser-induced periodic surface structures on titanium

Cited by 43 publications

References 33 publications

Laser-Induced Fast Assembly of Wettability-Finely-Tunable Superhydrophobic Surfaces for Lossless Droplet Transfer

Laser-Induced Fast Assembly of Wettability-Finely-Tunable Superhydrophobic Surfaces for Lossless Droplet Transfer

Recent advances in femtosecond laser-structured Janus membranes with asymmetric surface wettability

Facile Preparation of Hierarchical Micro‐/Nanostructure Superhydrophobic Surface with Excellent Corrosion Resistance on Ti6Al4V‐Based Composite for Nuclear Fuel Reprocessing

Contact Info

Product

Resources

About