A route towards superhydrophobic graphene surfaces: surface-treated reduced graphene oxide spheres

We present a simple route towards a superhydrophobic graphene surface, which opens up possibilities for transparent flexible graphene-based electrodes with a non-wetting property. By tailoring the surface energy and surface roughness, superhydrophobic properties of graphene with a contact angle greater than 150 degrees at an optical transparency of 72.7% were obtained.