Fabrication and anisotropic wettability of titanium-coated microgrooves

Gui, N, Xu, W, Tian, J, Rosengarten, G, Brandt, M and Qian, M 2018, 'Fabrication and anisotropic wettability of titanium-coated microgrooves', Journal of Applied Physics, vol. 123, no. 9, pp. 1-8.


Document type: Journal Article
Collection: Journal Articles

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Title Fabrication and anisotropic wettability of titanium-coated microgrooves
Author(s) Gui, N
Xu, W
Tian, J
Rosengarten, G
Brandt, M
Qian, M
Year 2018
Journal name Journal of Applied Physics
Volume number 123
Issue number 9
Start page 1
End page 8
Total pages 8
Publisher AIP
Abstract Surface wettability plays a critical role in a variety of key areas including orthopaedic implants and chemical engineering. Anisotropy in wettability can arise from surface grooves, which are of particular relevance to orthopaedic implants because they can mimic collagen fibrils that are the basic components of the extracellular matrix. Titanium (Ti) and its alloys have been widely used for orthopaedic and dental implant applications. This study is concerned with the fabrication of Ticoated microgrooves with different groove widths and the characterisation of the anisotropy in wettability through measuring water contact angles, compared with both the Wenzel and Cassie models. Experimental results revealed that there existed significant anisotropy in the wettability of Ti-coated microgrooves, and the degree of anisotropy (Dh) increased with an increasing groove width from 5 lm to 20 lm. On average, the contact angle measured parallel to the groove direction (h//) was about 50-60 smaller than that measured perpendicular to the groove direction (h?). In general, the Wenzel model predicted the contact angles along the surface groove direction reasonably, and so did the Cassie model for the contact angles perpendicular to the groove direction. Osteoblast spreading was affected by the anisotropy in wettability, which occurred preferably along, rather than perpendicular to, the groove direction. These findings are informative for the design of Ti implant surfaces when anisotropy in wettability matters.
Subject Materials Engineering not elsewhere classified
DOI - identifier 10.1063/1.5020517
Copyright notice © 2018 Author(s).
ISSN 0021-8979
Additional Notes This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in, "Gui, N, Xu, W, Tian, J, Rosengarten, G, Brandt, M and Qian, M 2018, 'Fabrication and anisotropic wettability of titanium-coated microgrooves', Journal of Applied Physics, vol. 123, no. 9, pp. 1-8" and may be found at https://dx.doi.org/10.1063/1.5020517
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