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doi:10.22028/D291-42002
Titel: | Topography versus chemistry - How can we control surface wetting? |
VerfasserIn: | Lößlein, Sarah Marie Mücklich, Frank Grützmacher, Philipp G. |
Sprache: | Englisch |
Titel: | Journal of Colloid and Interface Science |
Bandnummer: | 609 (2022) |
Seiten: | 645-656 |
Verlag/Plattform: | Elsevier |
Erscheinungsjahr: | 2021 |
Freie Schlagwörter: | Wetting Direct laser writing Wetting anisotropy Static contact angle PVD-coating Wenzel wetting Cassie-Baxter wetting |
DDC-Sachgruppe: | 500 Naturwissenschaften |
Dokumenttyp: | Journalartikel / Zeitschriftenartikel |
Abstract: | Hypothesis: Wetting characterization and the production of engineered surfaces showing distinct contact angles or spreading behavior is of major importance for many industrial and scientific applications. As chemical composition plays a major role in the wetting behavior of flat samples, wettability, capillary forces and resulting droplet spreading on anisotropic surface patterns are expected to be highly depen dent on surface chemistry as well. Experiments: To gain understanding of the fundamental principles of the interplay between surface topography and surface chemistry regarding water wettability, anisotropic line patterns were produced on steel samples in a direct laser writing process. Homogeneous surface coatings allowed for a chemical masking of the laser patterns and therewith the identification of the influence of surface chemistry on static contact angles and wetting anisotropy. Findings: While a carbon coating leads to pronounced wettability and spreading along the topographic anisotropy, an inert gold–palladium coating can fully suppress anisotropic droplet spreading. Model cal culations show that an amorphous carbon coating leads to Wenzel wetting while the gold–palladium coating causes air inclusions between the water and the surface in the Cassie-Baxter wetting state. Only in combination with the right chemical composition of the surface, directional patterns show their potential of anisotropic wetting behavior. |
DOI der Erstveröffentlichung: | 10.1016/j.jcis.2021.11.071 |
URL der Erstveröffentlichung: | https://doi.org/10.1016/j.jcis.2021.11.071 |
Link zu diesem Datensatz: | urn:nbn:de:bsz:291--ds-420027 hdl:20.500.11880/37588 http://dx.doi.org/10.22028/D291-42002 |
ISSN: | 0021-9797 |
Datum des Eintrags: | 6-Mai-2024 |
Fakultät: | NT - Naturwissenschaftlich- Technische Fakultät |
Fachrichtung: | NT - Materialwissenschaft und Werkstofftechnik |
Professur: | NT - Prof. Dr. Frank Mücklich |
Sammlung: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
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