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Fabrication of superhydrophobic surfaces on zinc substrates

Author:
Xu, Wenguo  Ning, Tao  Yang, Xiaochan  Lu, Shixiang  


Journal:
APPLIED SURFACE SCIENCE


Issue Date:
2011


Abstract(summary):

Stable superhydrophobic surfaces were fabricated on the zinc substrates through simple silver replacement deposition process with the modification of octadecyl mercaptan. The effects of reaction conditions on the surface morphology and wettability of the prepared surfaces were carefully studied. The results show that the fabrication of a best superhydrophobic surface depends largely on the moderate reactant concentration. When the concentration of AgNO(3) solution was 2 mmol/L, the zinc substrate was covered by a dendritic outline structure. Aggregated silver nanoparticles were formed on the substrate in accordance with some certain laws, exhibiting great surface roughness. The typical hierarchical micro-nanostructures, flower-like structures and porous structures also could be found from the SEM images. The maximal water contact angle (CA) value of about 161 +/- 2 degrees, and the minimal sliding angle (SA) of about 2 degrees were obtained under the same reaction condition. (c) 2011 Elsevier B.V. All rights reserved.


Page:
4801---4806


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