Antibacterial Activity of Neurothemis ramburii Wings against Escherichia coli and Bacillus cereus

Dragonfly is categorized as the most excellent nature flyers which have wings that exhibit excellent functional characteristic through morphology, configuration, structure, and material. Dragonfly has nanostructured wings which are important to organisms as self-adaptation and survival tools. Wings of dragonfly possess bactericidal and antireflective properties to protect them from their natural predators. There are widely studied reported that Escherichia coli and Bacillus cereus are resistance to antibiotics, thus the nanostructured surface of dragonfly wing can be used as an alternative way to killed bacteria. In this study, the nanostructured surface of the dragonfly wings was observed using Scanning Electron Microscope (SEM). This study also evaluated the antibacterial activity of dragonfly wings which is Neurothermis ramburii against Gram-negative and Gram-positive bacteria which are E. coli and B. cereus respectively. It was found that the height of nanopillar structure of Orthetrum chrysis and Neurothemis ramburii was difference in height but consist of same width and the N. ramburii wings shows effective to kill E. coli compared to B. cereus. Therefore, it can be potentially used in the development of new generation of antibacterial nanomaterial that can be applied to the surfaces of medical equipment and as a template for the production of synthetic antibacterial surfaces