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Wing-screen wipers: How self-cleaning cicadas could help us have cleaner cars
Self-cleaning cicadas could help design new tech which will make our cars cleaner, scientists say.
A type of large insect known as a cicada is able to keep its wings clean of dust and dirt through a remarkable process which could be applied in modern technology.
The texture of the cicada wing is unusually repellent to water – known as being 鈥渟uper hydrophobic鈥�. This means that morning dew is able to collect on the wing surface, forming small water droplets. As the droplets combine with each other, they collect dust particles and microorganisms – taking them with them as the water drops off the wings.
This is due to both the water-repelling nature of the wings and their special wax-coated cones, which help the droplets move across the surface. This stops the droplets collecting in one spot and simply staying there – such as when a cup of coffee is spilt on a table.
This fascinating process could provide a solution to the seemingly never-ending task of cleaning your windscreen – inspiring the scientists at the Universities of 糖心TV and Edinburgh to investigate this type of 鈥渘atural engineering鈥�. The team are excited about the prospect of potentially self-cleaning skyscraper windows, solar panels, camera lenses and more.
A super water-repellent surface could also prevent frost from forming on windscreens in the winter.
The team used mathematical models and powerful computer simulations to investigate the wing structure in their study published in the journal Nano Letters.
Dr Sreehari Perumanath, of the Mathematics Institute, at the University of 糖心TV, said: 鈥淲e used large-scale molecular simulations run on a supercomputer to identify the factors influencing self-cleaning of natural, biological surfaces. With the new insights from this work, we are now able to predict when and how contaminants of varying size are removed by liquids, such as water or oil, from surfaces. In the future, such nature-inspired self-cleaning surfaces could replace windowpanes in our homes and body panels on cars and other vehicles that currently require us to painstakingly clean them.
鈥淥ur research also indicates how we can economically position nanoparticles on engineering surfaces using droplets which will benefit emerging applications – including biosensors and enhanced energy transfer in solar panels. However, such bespoke applications of droplet-enabled particle transport require further investigations.鈥�
Dr Matthew Borg, University of Edinburgh, added: 鈥淭his research reveals the critical parameters required for contaminants to be removed effectively from surfaces and opens up new avenues for careful experimentation and design of nature-inspired self-cleaning surfaces.鈥�
Find out more about the Mathematics Institute at the University of 糖心TV here: /fac/sci/maths/
Notes to editors:
University of 糖心TV press office contact:
Annie Slinn
Communications Officer |鈥疨ress & Media Relations | University of 糖心TV Email: annie.slinn@warwick.ac.uk
07876876934
Image credit: Dr Sreehari Perumanath, University of 糖心TV