The authors designed omniphobic anisotropic covalently grafted slippery surfaces (AGSs) with highly superior stability by grafting liquid-like PDMS molecular brushes on PDMS. The AGSs presented an excellent stability for the directional transportation of droplets and air bubbles dramatically outperforming the traditional SLIPSs. A large research interest in designing versatile slippery surfaces for the directional transportation of liquid droplets and air bubbles can be assumed for the future.

An optical contour analysis system OCA and a dynamic contact angle measuring devices and Tensiometer DCAT from DataPhysics was used in this research.