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https://doi.org/10.2961/jlmn.2011.01.0002
Title: | Laser ablation of metal substrates for super-hydrophobic effect | Authors: | Tang, M. Shim, V. Pan, Z.Y. Choo, Y.S. Hong, M.H. |
Keywords: | Contact angle and high speed camera imaging Laser ablation Super-hydrophobic surface |
Issue Date: | Mar-2011 | Citation: | Tang, M., Shim, V., Pan, Z.Y., Choo, Y.S., Hong, M.H. (2011-03). Laser ablation of metal substrates for super-hydrophobic effect. Journal of Laser Micro Nanoengineering 6 (1) : 6-9. ScholarBank@NUS Repository. https://doi.org/10.2961/jlmn.2011.01.0002 | Abstract: | Pulsed UV laser ablation is applied to fabricate super-hydrophobic surfaces on metal substrates. The spike shape micro-structure arrays achieved by the laser ablation on the brass substrates increase the surface roughness (Ra) from ~ 400 nm to ~ 5 μm. Meanwhile, plenty of nano-structures (200 ~ 600 nm) are also formed and scattered on the surface of the micro-structures. It is found that the water contact angle of the brass substrate increases from 110° to 161°. Super-hydrophobic property of the metal surfaces with both the micro- & nano-roughness is explained by water repellent model for double roughness structures. High speed camera imaging is used to analyze water droplet dynamics during its rolling down along the slanted super-hydrophobic brass surface. It shows that the pulsed laser ablation is a versatile approach to create large area super-hydrophobic surfaces for industrial applications. | Source Title: | Journal of Laser Micro Nanoengineering | URI: | http://scholarbank.nus.edu.sg/handle/10635/82603 | ISSN: | 18800688 | DOI: | 10.2961/jlmn.2011.01.0002 |
Appears in Collections: | Staff Publications |
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