Controllable underwater anisotropic oil-wetting
2014; American Institute of Physics; Volume: 105; Issue: 7 Linguagem: Inglês
10.1063/1.4893945
ISSN1520-8842
AutoresJiale Yong, Feng Chen, Qing Yang, Umar Farooq, Hao Bian, Guangqing Du, Xun Hou,
Tópico(s)Electrohydrodynamics and Fluid Dynamics
ResumoThis Letter demonstrates a simple method to achieve underwater anisotropic oil-wetting using silicon surfaces with a microgroove array produced by femtosecond laser ablation. The oil contact angles along the direction perpendicular to the grooves are consistently larger than those parallel to the microgroove arrays in water because the oil droplet is restricted by the energy barrier that exists between the non-irradiated domain and the trapped water in the laser-ablated microgrooves. This underwater anisotropic oil-wetting is able to be controlled, and the anisotropy can be tuned from 0° to ∼20° by adjusting the period of the microgroove arrays.
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