Cochlea implants (CI) are a well-accepted and effective solution for deaf patients with non-functional inner ear. CIs create an audio impression by stimulating the auditory nerve using an electrode array with a number of stimulation contacts. These contacts are the actual interface between the technical and biological systems. The electrode array is implanted into the cochlea, where it can, in the ideal case, function for a lifetime. Up to now, little attention has been paid to the qualities of the electrode surface. However, nature shows us that surface topography can make a major contribution to the functionality of the whole system. For example, the super hydrophobic properties of the lotus leaf are impossible without a special surface micro- and nano topography. Likewise, CIs can profit in many ways from adapted functional surface structures.