Biomimetic Design Inspired Sharkskin Denticles for Growth Suppression of Biofilm

Abstract

While the hydrodynamic function of sharkskin has been controversially hypothesized to be capable of achieving turbulent flow control and drag reduction, sharkskin-inspired “riblets” have been reported to be an effective biomimetic design (BMD). Furthermore, denticles have been found to not only improve fluid properties but also provide an antibacterial effect. We address an integrated study of developing biomimetic riblets inspired by the antibacterial properties of sharkskin denticles. The covering ratio of bacteria on samples with BMD structures was evaluated to confirm the effect of the antibacterial property. Our results indicate that as the non-uniformity of the grooves increases, the bacteria adhering to the surface is removed due to the effect of the longitudinal vortex generated on the sharkskin, and the growth of the biofilm is suppressed.