Tribological Properties and wettability of patterned surfaces with different diameter, pitch and aspect ratio and coated surfaces with DLC and Z-dol

Title
Tribological Properties and wettability of patterned surfaces with different diameter, pitch and aspect ratio and coated surfaces with DLC and Z-dol
Authors
Shuxue PiaoNagaraj MachavallavanDuc-Cuong PhamKyung-Young Jhang윤의성
Keywords
Nano; Wettability; Adhesion; Friction; DLC; Z-DOL
Issue Date
2013-05
Publisher
STLE 68th annual meeting, 2014
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/47275
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KIST Publication > Conference Paper
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