“…Such surface has attracted a great deal of interest in both fundamental research and practical applications due to its unique characteristics such as selfcleaning [4][5][6], water repellency [7], anti-icing [8][9][10], anti-corrosion [11][12][13] and oil-water separation [14][15][16]. The key factor to construct a superhydrophobic surface is the existence of a low energy layer on a rough hierarchical structure [17][18][19][20][21]. So far, a large number of approaches have been successfully used to develop superhydrophobic surfaces, including chemical vapour deposition [22], chemical etching [23], sol-gel [24], solution immersion [25], hydrothermal synthesis [26],and laser fabrication [27], etc.…”