Representative fluorescence microscopy images (A) of P. aeruginosa stained with Live/Dead viability stain and (B) percentage of dead cells. Live cells are stained green, while dead cells appear red. Increase in the % kill was observed on both nanotopographies, compared to the FLAT Ti surface. No effect of the biomolecules was visible. **p < 0.01 vs. uncoated condition (FLAT, FINE and COARSE, respectively).