 | Nanotech 2011 Vol. 1
Nanotechnology 2011: Advanced Materials, CNTs, Particles, Films and Composites
Chapter 4: Nanostructured Coatings, Surfaces & Films |
Rendering superhydrophobic laser-induced rough surfaces by transfering on them Teflon nanoparticles | |
| Authors: | A. Athanassioua, I. Bayer, F. Brandi, R. Cingolani |
| Affilation: | Istituto Italiano di Tecnologia, IT |
| Pages: | 395 - 398 |
| Keywords: | superhydrophobicity, laser-treated surfaces, Teflon nanoparticles |
| Abstract: | In this work we demonstrate the possibility to alter the wettability properties of silicon/SiO2 surfaces, by UV nanosecond pulsed laser irradiation, to render them initially superhydrophilic. By varying the laser fluence, it is possible to control in a systematic and reproducible way the surface roughness, and thus the wettability properties of the silicon/SiO2 surfaces. After the laser treatment, submicron (~ 200 nm) Teflon® particles are deposited onto the rough surfaces by a dry-transfer technique, that allows to the particles to be positioned among the rough structures. The Teflon® particles are stably deposited onto the laser-treated structures, since post treatment with different solvent was impossible to remove them. Depending on the initial hydrophilicity and roughness of the laser-treated surfaces, after the transfer of the Teflon® particles, the surfaces can become from very hydrophobic ≥120° to superhydrophobic ≥ 160°. |
| ISBN: | 978-1-4398-7142-3 |
| Pages: | 882 |
| Hardcopy: | $199.95 |
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