Abstract
A novel superhydrophobic ultra-thin film with contact angle of 166° was prepared by stearic acid (STA) chemically adsorbed onto the polyethyleneimine (PEI) coated aluminum wafer. Composite interface between the water droplet and the rough needle-like surface was attributed to responsible for the super water-repellent property. It was found that close relationship existed between the surface morphology and the contact angle. The ultra-thin film has weak contact angle hysteresis with the advancing and receding contact angle about 168° and 156°, respectively. However, if the water droplet was placed onto the surface keeping static for a long times, the contact mode might be changed from composite interface into noncomposite interface, and then generate large angle hysteresis.
| Original language | English |
|---|---|
| Pages (from-to) | 785-788 |
| Number of pages | 4 |
| Journal | International Journal of Nonlinear Sciences and Numerical Simulation |
| Volume | 3 |
| Issue number | 3-4 |
| Publication status | Published - 2002 |
Keywords
- AFM
- Contact angle
- Morphology
- Superhydrophobicity