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| Content Provider | Springer Nature Link |
|---|---|
| Author | Wang, Bing Wang, XinCai Zheng, HongYu Lam, YeeCheong |
| Copyright Year | 2016 |
| Abstract | In this paper, we demonstrated a simple method to create either a hydrophilic or hydrophobic surface. With femtosecond laser irradiation at different laser parameters, the water contact angle (WCA) on polystyrene’s surface can be modified to either 12.7° or 156.2° from its original WCA of 88.2°. With properly spaced micro-pits created, the surface became hydrophilic probably due to the spread of the water droplets into the micro-pits. While with properly spaced micro-grooves created, the surface became rough and more hydrophobic. We investigated the effect of laser parameters on WCAs and analyzed the laser-treated surface roughness, profiles and chemical bonds by surface profilometer, scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). For the laser-treated surface with low roughness, the polar (such as C—O, C=O, and O—C=O bonds) and non-polar (such as C—C or C—H bonds) groups were found to be responsible for the wettability changes. While for a rough surface, the surface roughness or the surface topography structure played a more significant role in the changes of the surface WCA. The mechanisms involved in the laser surface wettability modification process were discussed. |
| Starting Page | 1 |
| Ending Page | 5 |
| Page Count | 5 |
| File Format | |
| ISSN | 16747348 |
| Journal | Science in China Series G |
| Volume Number | 59 |
| Issue Number | 12 |
| e-ISSN | 18691927 |
| Language | English |
| Publisher | Science China Press |
| Publisher Date | 2016-10-21 |
| Publisher Place | Beijing |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | femtosecond laser polystyrene (PS) wettability micro-pits & micro-grooves surface texturing and surface modification Laser-beam impact phenomena Surface cleaning, etching, patterning Polymers, elastomers, and plastics Physics Classical and Continuum Physics Astronomy, Observations and Techniques |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physics and Astronomy |
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