Figure 6.

Gold (Au) electrodes functionalized with conductive pilin monolayers. (A) Predicted structure of a monolayer of truncated pilins attached to the electrode with a cysteine tag (red) and showing the aromatic amino acids (phenylalanine, green; tyrosines, orange) and acidic ligands (red) of the metal traps exposed to the solvent. (B) Cartoon illustrating the favoured flow of electrons from the aromatic doped region dominated by charge hopping, across the region of interchain tunnelling and to the metal trap.