Tribological Properties and wettability of patterned surfaces with different diameter, pitch and aspect ratio and coated surfaces with DLC and Z-dol
- Tribological Properties and wettability of patterned surfaces with different diameter, pitch and aspect ratio and coated surfaces with DLC and Z-dol
- Shuxue Piao; Nagaraj Machavallavan; Duc-Cuong Pham; Kyung-Young Jhang; 윤의성
- Nano; Wettability; Adhesion; Friction; DLC; Z-DOL
- Issue Date
- STLE 68th annual meeting, 2014
- A combination of topographically and chemically modified surface promises to be an effective
method to improve tribological properties. We fabricated Si nanaopatterns of varying diameter, pitch and aspect ratio, and subsequently coated with DLC and Z-dol films. Wetting behavior and nano-adhesion/friction of the modified surfaces were investigated. Results showed that the patterning enhanced wettability of Si flat surfaces, along with two distinct wetting states: the Wenzel and the hemi-wicking, depended on the value of the pitch-over-diameter ratio. In DLC and Z-DOL coated patterns, three wetting states were observed: the Cassie-Baxter, the Wenzel, and their transition. Examination of the nanotribological properties indicated that the combination of the nanopatterns and the films greatly reduced the adhesive and frictional forces. Furthermore, the pitch and diameter of the nanopatterns were found to significantly influence their adhesion/friction behaviors.
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