Fig. 1. Superhydrophobicity in nature. (a) Optical images of the spherical water drops rolling-off the natural Nelumbo nucifera (lotus leaf) and the corresponding scanning electron microscopy (SEM) image of the surface topography of the lotus-leaf with the higher magnification of the lotus surface shown in the inset. (b) SEM image of the structure found on the rose petal and the corresponding photograph images of spherical water droplets sticking to the rose-petal surface. SEM image of the microstructure found in broccoli and the corresponding optical images of its superhydrophobic properties.
