Antibacterial characteristics of Si nano-pillar array

Cicada wings have nanostructures which shows superhydrophobic property, non reflecting to the light, and antibacterial characteristics. To mimic the nano structure of a cicada wing, we fabricated nano-pillar array using metal assisted etching. Fabricated nano-pillar array showed higher antibacterial property for E. coli. Our introduced process has advantages for industrial usage because of low cost and low environmental load based on wet process.