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Wettability control by DLC coated nanowire topography
Zihui Li1, Fanhao Meng, Xuanyong Liu
1State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, People's Republic of China.
Nanotechnology
|February 24, 2011
Summary
Researchers developed controllable wettability surfaces using diamond-like carbon (DLC) films on nanostructured titanium. Surface topography is key for hydrophobicity, with fluorine implantation enabling superhydrophobicity.
Area of Science:
- Materials Science
- Surface Science
- Nanotechnology
Background:
- Developing surfaces with tunable wettability is crucial for diverse industrial applications.
- Nanostructured surfaces offer unique properties but require precise fabrication control.
Purpose of the Study:
- To create a method for fabricating wettability-controllable nanostructured surfaces.
- To investigate the relationship between surface structure, composition, and wettability.
Main Methods:
- Synthesized diamond-like carbon (DLC) films on nanowire-structured titanium substrates using plasma immersion ion implantation and deposition (PIII&D).
- Characterized nanostructure using field emission scanning electron microscopy (FESEM).
- Analyzed bonding in DLC films with Raman spectroscopy and measured water contact angles.
Main Results:
- DLC films exhibited a rippling layer-by-layer growth pattern.
- Achieved a wide range of water contact angles (50°-141°).
- Demonstrated that surface topography is critical for hydrophobicity; CF₄ implantation enabled superhydrophobicity due to fluorine.
Conclusions:
- Fabrication of wettability-controllable nanostructured surfaces is feasible using PIII&D.
- Surface topography plays a dominant role in achieving high hydrophobicity.
- Pre-depositing carbon content is essential to preserve nanostructure integrity during CF₄ implantation for superhydrophobicity.
