A study was conducted to demonstrate how switchable water-adhesive, superhydrophobic palladium-layered silicon nanowires potentiated the angiogenic efficacy of human stem cell spheroids. The water-adhesion switchable superhydrophobic surface was fabricated by deposition of a gas-sensitive palladium (Pd) layer onto vertically aligned silicon (Si) nanowires (NWs) and by subsequent coating with dodecylalkyltrichlorosilane (DTS). The resulting Pd-covered Si NWs (Pd/Si NWs) exhibited high water-repellant properties under atmospheric conditions. The surface of the Pd/Si NWs became water adhesive when exposed to ambient hydrogen (H2). The adhesion transition process occurred within only 5 seconds and the Pd/Si NWs showed extremely large water contact angle (WCA) in both ambient conditions.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering