American scientists have shown that the chemical composition of the wings of cicadas affects their superhydrophobicity and bactericidal properties is not less than nanorelay texture on the surface. In an article in Advanced Materials , the scientists writethat fatty acids and saturated hydrocarbons on the surface of the wing to kill adhering to the wings of the bacteria and the cicadas with a smooth wing, and those the surface of which is covered with an array of nanorods. In the second case, it also makes the wing superhydrophobic.
The wings of many insects have hydrophobic surface — this helps to protect the wing from dirt, rain drops and bacteria. This protection prevents dirt to adhere to the wings, but if that’s not enough, the insects are not limited to changes in the chemical composition of the surface, and is further applied to the relief nanotexture. Then the surface becomes superhydrophobic, and the drops do not just stick to the wings, and immediately roll with them. It is believed that some species of cicadas this texture helps to fight biogarantie, damaging the membrane adhering to the wings of the bacteria.
American researchers under the leadership of Jessica’s novel Kustas (Jessica Román-Kustas) of research laboratory equipment (CERL) decided to investigate whether the bactericidal nature of the wings of cicadas related to their superhydrophobicity and what role in anti-microbial properties, chemical composition plays wing and nanorelief on the surface. To do this, scientists compared the wings of the two species from the family of singing cicadas: the annual cicadas Neotibicen pruinosus and periodical cicadas Magicicada cassinii. The periodical Cicada has a 17-year development cycle, but in the form of an adult insect with wings lives less than a month. The Cicada N. pruinosus development cycle all year, but in the winged form it is much longer — from 2 to 4 months. Therefore, your wings from the water that protects the insect much harder if the 17-year cicadas M. cassinii the wing surface is almost smooth and ledges not exceeding 50 nanometers, on the wings of an annual Cicada N. pruinosus is possible to find an ordered array of nanocolumn height of several hundreds of nanometers.