Spontaneous movement of water droplets on patterned Cu and Al surfaces with wedge-shaped gradients
| Autor: | Nathaniel Rogers, Andrew D. Sommers, Muidh Alheshibri, Khalid Eid |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) business.industry chemistry.chemical_element Surface tension gradient Copper Wedge (geometry) Physics::Fluid Dynamics Contact angle Surface tension Optics chemistry Aluminium Wedge angle Physics::Atomic and Molecular Clusters Composite material business |
| Zdroj: | Applied Physics Letters. 102:174103 |
| ISSN: | 1077-3118 0003-6951 |
| Popis: | We report a simple technique for moving water droplets on a hydrophilic aluminum surface containing a hydrophobic copper background. A surface tension gradient due to a triangular-shaped wedge moves the droplets towards the end of the wedge which contains more Al surface area. Movement on both horizontal surfaces and surfaces oriented vertically against gravity has been observed. The mode of droplet motion was found to depend on the wedge angle, and the speed was found to depend on both the wedge angle and the droplet contact angles on the Al and Cu. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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