| Autor: |
ten Brink, G. H., van het Hof, P. J., Chen, B., Sedighi, M., Kooi, B. J., Palasantzas, G. |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 12/5/2016, Vol. 109 Issue 23, p1-5, 5p, 1 Color Photograph, 3 Graphs |
| Abstrakt: |
The wetting state of surfaces can be controlled physically from the highly hydrophobic to hydrophilic states using the amorphous-to-crystalline phase transition of Ge2Sb2Te5 (GST) nanoparticles as surfactant. Indeed, contact angle measurements show that by increasing the surface coverage of the amorphous nanoparticles the contact angle increases to high values -140°, close to the superhydrophobic limit. However, for crystallized nanoparticle assemblies after thermal annealing, the contact angle decreases down to -40° (significantly lower than that of the bare substrate) leading to an increased hydrophilicity. Moreover, the wettability changes are also manifested on the capillary adhesion forces by being stronger for the crystallized GST state. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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