Direct generation of superhydrophobic microstructures in metals by UV laser sources in the nanosecond regime
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Jose L. Ocaña
Jose L. Ocaña was awarded his MSc (1979) and a PhD (1982) in Industrial Engineering (Energy) at the Polytechnical University of Madrid (Spain). He is Chair Professor of Mechanical Engineering at the ETSII-UPM School of Engineering and Director of the UPM Laser Centre at this University. He is responsible for coordination of worldwide R&D initiatives in the field of scientific and industrial applications of high-power lasers, especially in high-intensity laser-matter interaction, laser welding, laser surface treatments, laser micromachining, and on-line monitoring and control of industrial laser applications. Author/coauthor of more than 150 scientific papers and more than 200 communications in the field of laser technology and applications. Former Chairman of EULASNET II (Eureka Umbrella Network for Laser Technology and Applications). Member of the Executive Board of the European Laser Institute (ELI).
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R. Jagdheesh
R. Jagdheesh, was awarded his MSc (1998) and PhD (2005) in Physics from Bharathidasan University, India. After the PhD, he worked as postdoctoral fellow at Raja Ramanna Centre for Advanced Technologies in India, ENSMA CNRS in France, University of Twente in Netherlands, and University of New South Wales, Australia before he joined the CLUPM, Polytechnical University of Madrid in Spain. His research is focused on laser cladding, laser surface alloying and laser micromachining for surface functionalization. He has published more than 35 research papers in journals and conference proceedings.
J.J. García-Ballesteros, was awarded his MSc in Physics (2004) and PhD in Applied Sciences (2016) at the Polytechnical University of Madrid (Spain). Specialist in short pulse laser-matter interaction and development of laser micromanufacturing applications, with high experience in ns and ps laser systems.
Abstract
The current availability of new advanced fiber and DPSS lasers with characteristic pulse lengths ranging from ns to fs has provided a unique frame in which the development of laser-generated microstructures has been made possible for very diverse kinds of materials and applications. At the same time, the development of the appropriate laser-processing workstations granting the appropriate precision and repeatability of the respective laser interaction processes in line with the characteristic dimension features required in the microstructured samples has definitively consolidated laser surface microstructuring as a reference domain, nowadays, unavoidable for the design and manufacturing of current use microsystem: MEMSs, fluidic devices, advanced sensors, biomedical devices and instruments, etc., are all among the most well-known developments of the micromanufacturing technology. Completing the broad spectrum of applications developed mostly involving the generation of geometrical features on a subtrate with specific functional purposes, a relatively new, emerging class of laser-microstructuring techniques is finding an important niche of application in the generation of physically structured surfaces (particularly of metallic materials) with specific contact, friction, and wear functionalities, for whose generation the concourse of different types of laser sources is being found as an appropriate tool. In this paper, the application of laser sources with emission in the UV and at ns time regime to the surface structuration of metal surfaces (specifically Al) for the modification of their wettability properties is described as an attractive application basis for the generation of self-cleaning properties of extended functional surfaces. Flat aluminum sheets of thickness 100 μm were laser machined with ultraviolet laser pulses of 30 ns with different laser parameters to optimize the process parameters. The samples produced at the optimum conditions with respect to contact angle measurement were subjected to microstructure and chemical analysis. The wetting properties were evaluated by static contact angle measurements on the laser-patterned surface. The laser-patterned microstructures exhibited superhydrophobicity with a maximum contact angle of 180° for the droplet volumes in the range of 8–12 μl.
About the authors
Jose L. Ocaña was awarded his MSc (1979) and a PhD (1982) in Industrial Engineering (Energy) at the Polytechnical University of Madrid (Spain). He is Chair Professor of Mechanical Engineering at the ETSII-UPM School of Engineering and Director of the UPM Laser Centre at this University. He is responsible for coordination of worldwide R&D initiatives in the field of scientific and industrial applications of high-power lasers, especially in high-intensity laser-matter interaction, laser welding, laser surface treatments, laser micromachining, and on-line monitoring and control of industrial laser applications. Author/coauthor of more than 150 scientific papers and more than 200 communications in the field of laser technology and applications. Former Chairman of EULASNET II (Eureka Umbrella Network for Laser Technology and Applications). Member of the Executive Board of the European Laser Institute (ELI).
R. Jagdheesh, was awarded his MSc (1998) and PhD (2005) in Physics from Bharathidasan University, India. After the PhD, he worked as postdoctoral fellow at Raja Ramanna Centre for Advanced Technologies in India, ENSMA CNRS in France, University of Twente in Netherlands, and University of New South Wales, Australia before he joined the CLUPM, Polytechnical University of Madrid in Spain. His research is focused on laser cladding, laser surface alloying and laser micromachining for surface functionalization. He has published more than 35 research papers in journals and conference proceedings.
J.J. García-Ballesteros, was awarded his MSc in Physics (2004) and PhD in Applied Sciences (2016) at the Polytechnical University of Madrid (Spain). Specialist in short pulse laser-matter interaction and development of laser micromanufacturing applications, with high experience in ns and ps laser systems.
Acknowledgments
The authors are thankful to BSH Electrodomésticos España S.A. for their support in executing this work.
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©2016 THOSS Media & De Gruyter
Artikel in diesem Heft
- Cover and Frontmatter
- Editorial
- Reviewer recognition and new plans for 2016
- Community
- News from the European Optical Society
- Conference Notes
- Conference Calendar
- Topical issue: Optics for material processing
- Editorial
- Optics for material processing
- Review Articles
- Near-field optics for nanoprocessing
- Interference laser processing
- Holographic femtosecond laser manipulation for advanced material processing
- Research Articles
- Theoretical and experimental analysis of scan angle-depending pulse front tilt in optical systems for laser scanners
- Transient beam oscillation with a highly dynamic scanner for laser beam fusion cutting
- Adaptive optical beam shaping for compensating projection-induced focus deformation
- Formation of in-volume nanogratings in glass induced by spatiotemporally focused femtosecond laser pulses
- Direct generation of superhydrophobic microstructures in metals by UV laser sources in the nanosecond regime
Artikel in diesem Heft
- Cover and Frontmatter
- Editorial
- Reviewer recognition and new plans for 2016
- Community
- News from the European Optical Society
- Conference Notes
- Conference Calendar
- Topical issue: Optics for material processing
- Editorial
- Optics for material processing
- Review Articles
- Near-field optics for nanoprocessing
- Interference laser processing
- Holographic femtosecond laser manipulation for advanced material processing
- Research Articles
- Theoretical and experimental analysis of scan angle-depending pulse front tilt in optical systems for laser scanners
- Transient beam oscillation with a highly dynamic scanner for laser beam fusion cutting
- Adaptive optical beam shaping for compensating projection-induced focus deformation
- Formation of in-volume nanogratings in glass induced by spatiotemporally focused femtosecond laser pulses
- Direct generation of superhydrophobic microstructures in metals by UV laser sources in the nanosecond regime
