Pham, D. C. Na, K. Piao, S. Cho, I-J Jhang, K-Y Yoon, E-S 2024-01-20T16:05:22Z 2024-01-20T16:05:22Z 2021-09-01 2011-09-30 0957-4484 https://pubs.kist.re.kr/handle/201004/129977 A large number of silicon (Si) patterns consisting of nanopillars of varying diameter and pitch have been fabricated and further coated with diamond-like carbon (DLC) and perfluoropolyether (Z-DOL) films. The wetting behavior and nano-adhesion/friction of the patterns are investigated experimentally in relation to the nanostructures and the hydrophobicity of the materials. Measurements of water contact angle illustrate that the patterning-enhanced wettability of the Si flat surface, along with two distinct wettings which are in good agreement with the Wenzel and hemi-wicking states, depended on the value of the pitch-over-diameter ratio. In the case of the coated patterns, three wetting states are observed: the Cassie-Baxter, the Wenzel, and a transition from the Cassie-Baxter into the Wenzel, which varies with regard to the hydrophobic properties of the DLC and Z-DOL. In terms of tribological properties, it is demonstrated that a combination of the nanopatterns and the films is effective in reducing adhesive and frictional forces. In addition, the pitch and diameter of the patterns are found to significantly influence their adhesion/friction behaviors. English IOP PUBLISHING LTD SELF-ASSEMBLED MONOLAYERS CONTACT-ANGLE HYSTERESIS FRICTION PROPERTIES POLYMERIC SURFACES ADHESION HYDROPHOBICITY WETTABILITY TOPOGRAPHY MECHANISMS FORCES Wetting behavior and nanotribological properties of silicon nanopatterns combined with diamond-like carbon and perfluoropolyether films Article 10.1088/0957-4484/22/39/395303 1 NANOTECHNOLOGY, v.22, no.39 NANOTECHNOLOGY 22 39 scie scopus 000294723700009 2-s2.0-80052518637 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Science & Technology - Other Topics Materials Science Physics Article SELF-ASSEMBLED MONOLAYERS CONTACT-ANGLE HYSTERESIS FRICTION PROPERTIES POLYMERIC SURFACES ADHESION HYDROPHOBICITY WETTABILITY TOPOGRAPHY MECHANISMS FORCES