Lotus effect

The term "Lotus-Effect" represents the replication of the self-cleaning properties of lotus leaves on man-made surfaces. The effect is based on a very hydrophobic surface that is also micro-structured. There is a big potential for obtaining similar effects in coatings using additives without the need for micro-structured surfaces. This approach permits the creation of transparent and high-gloss coatings that are significantly easier to keep clean than conventional painted surfaces. The phenomenon of the water repellency of plant leaf surfaces has been known for many years. The correlation of water repellency and self-cleaning properties of such surfaces has only recently been investigated in detail: the adhesion of contaminating particles ("dirt") is greatly reduced, and water droplets rolling across the surface can easily pick up the contaminating particles to leave behind a cleaned surface

Source: Added: 2 June 2006