Droplet manipulation of hierarchical steel surfaces using femtosecond laser fabrication


Type
Article
Change log
Authors
Hu, S 
Reddyhoff, T 
Vladescu, SC 
Shi, X 
Abstract

© 2020 Femtosecond laser irradiation is one of the most promising treatments to fabricate liquid repellent surfaces, attracting substantial scientific and industrial attention. So far, the focus has been on hierarchical interfacial structures at micro- and nanoscales, however, this has yet to be used in combination with macro-sized features. We present a strategy of femtosecond laser irradiation to create macro-micro-nano hierarchical surfaces for liquid droplet manipulation. These three-level hierarchical surfaces are shown to successfully split and gyrate impacting droplets. Our work is believed to be the first demonstration of femtosecond-laser-structured macro-micro-nano hierarchical surfaces to artificially design droplet impact, paving the way for aircraft anti-icing and energy harvesting.

Description
Keywords
Femtosecond laser, Hierarchical structure, Hydrophobic surface, Droplet manipulation
Journal Title
Applied Surface Science
Conference Name
Journal ISSN
0169-4332
1873-5584
Volume Title
521
Publisher
Elsevier BV
Rights
All rights reserved
Sponsorship
This work was supported by China Postdoctoral Science Foundation (2019T120340, 2017M621458), National Natural Science Foundation of China (11572192, 11632011), and Engineering and Physical Sciences Research Council (EP/N025954/1).