Contact angle and free surface energy of CdS films on polystyrene substrate
| Autor: | Alexander I. Bulavchenko, Aleksei N. Kolodin |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
General Physics and Astronomy 02 engineering and technology Surfaces and Interfaces General Chemistry Surface finish Sputter deposition 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Cadmium sulfide 0104 chemical sciences Surfaces Coatings and Films Surface tension Contact angle chemistry.chemical_compound chemistry Chemical engineering Polystyrene Wetting 0210 nano-technology Chemical bath deposition |
| Zdroj: | Applied Surface Science. 463:820-828 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2018.08.176 |
| Popis: | An approach to determination of the contact angle of water, formamide and diethylene glycol droplets (76 ± 2°, 70 ± 2°, 69 ± 2°) and the free surface energy of smooth flat cadmium sulfide films (28 ± 2 and 33 ± 2 mN/m by the Owens-Wendt and Wu models, respectively) was proposed. CdS nanoparticles (NPs) were deposited on polystyrene substrates by the chemical bath deposition (CBD) method. The roughness factor of a continuous film of CdS NPs was estimated from contact angles by the Wenzel equation and from scanning electron microscopy images (2.77 and 2.49, respectively). To this end, the surface was made chemically homogeneous by magnetron sputtering of a thin metallic Au-Pd film. The data obtained were used to analyze the wettability of the substrates with CdS NPs in dependence on their roughness as well as the possibility to create superhydrophobic coatings from such NPs. Photovoltaic and photocatalytic properties of the synthesized hydrophilic rough CdS films were demonstrated. |
| Databáze: | OpenAIRE |
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