| 초록 |
In recent years, the non-wetting property of superhydrophobic surfaces submerged in water has attracted much attention because it has potential applications. Among them, drag reduction has become a serious issue in recent years in terms of energy conservation and environmental protection. However, the air interlayer is highly unstable with limited life time due to the diffusion of the air gases into water and the instability of dewetted surfaces has been a sticking point for practical applications. This work presents a breakthrough in improving the underwater stability of superhydrophobic surfaces by optimizing nanoscale surface structures using SiC/Si interlocked structures. These structures have an unequaled stability of underwater superhydrophobicity and enhance drag reduction capabilities,with a lifetime of plastron over 18 days and maximum velocity reduction ratio of 56%. Furthermore, through photoelectrochemical water splitting on a hierarchical SiC/Si nanostructure surface, the limited lifetime problem of air pockets was overcome by refilling the escaping gas layer, which also provides continuous drag reduction effects. |
