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Published on: November 9, 2015
Femtosecond laser controlled wettability of solid surfaces
Jiale Yong1, Feng Chen1, Qing Yang1
1Key Laboratory of Photonics Technology for Information of Shaanxi Province & State Key Laboratory for Manufacturing System Engineering, School of Electronics & Information Engineering, Xi'an Jiaotong University, Xi'an, 710049, P. R. China. chenfeng@mail.xjtu.edu.cn yangqing@mail.xjtu.edu.cn.
Femtosecond laser microfabrication precisely controls surface wettability, creating superhydrophobic, underwater superoleophobic, anisotropic, and smart surfaces. Surface topography and chemistry are key to achieving these diverse wettability properties.
Area of Science:
- Materials Science
- Surface Science
- Nanotechnology
Background:
- Femtosecond laser microfabrication is a powerful technique for modifying surface properties.
- Controlling surface wettability is crucial for various applications, including microfluidics and anti-fouling coatings.
- Existing methods often lack the precision to create complex wettability patterns.
Purpose of the Study:
- To introduce and categorize special wettability phenomena induced by femtosecond laser microfabrication.
- To detail the mechanisms behind femtosecond laser-induced superhydrophobicity, underwater superoleophobicity, anisotropic wettability, and smart wettability.
- To highlight the relationship between surface topography, chemical composition, and resulting wettability.
Main Methods:
- Utilizing femtosecond laser pulses to ablate and pattern various solid substrates.
- Characterizing static wettability using contact angle measurements.
- Investigating dynamic wettability through liquid droplet sliding behavior analysis.
Main Results:
- Demonstrated the ability to achieve superhydrophobicity and underwater superoleophobicity.
- Fabricated surfaces exhibiting anisotropic wettability.
- Created smart wettable surfaces responsive to external stimuli.
- Correlated specific microstructures and chemical modifications with observed wettability states.
Conclusions:
- Femtosecond laser microfabrication offers versatile control over surface wettability.
- Surface topography and chemistry are critical parameters for tailoring wettability.
- This technique enables the creation of advanced surfaces with tailored liquid interaction properties.
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