antibacterial surfaces

Antibacterial surfaces are one way that we are fighting back against antibiotic-resistant bacteria. In one type of surface – naturally found on dragonfly wings – tiny pillars physically rip bacteria apart.
It's widely believed that a "bed of nails" surface destroys bacteria through puncturing the cell wall. But new research, based on extensive use of various microscopy techniques, a team of Australian and Nigerian have shown that an entirely different killing mechanism may be at play.