small plans: nanotechnology for the building industry

Thursday, October 27, 2005

Raspberry and lotus lead to water-shedding film

Researchers from the Eindhoven University of Technology in the Netherlands have mimicked the structure of the lotus leaf to produce a strongly water-repellent surface. The coating consists of raspberry-like particles made of silica spheres bonded to an epoxy-based polymer film. "Mother Nature is the greatest teacher to mankind," said researcher Weihua (Marshall) Ming. "The dual-size surface roughness on, for instance, the lotus leaf has proven to be very effective in generating superhydrophobicity. Meanwhile, a raspberry fruit naturally demonstrates dual-size morphology. We simply connected the characteristics of these two 'products' - raspberry and lotus leaf - to prepare our superhydrophobic films." more @