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Purity of the sacred lotus, or escape from contamination in biological surfaces
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Journal Article
Purity of the sacred lotus, or escape from contamination in biological surfaces
1997
Overview
The microrelief of plant surfaces, mainly caused by epicuticular wax crystalloids, serves different purposes and often causes effective water repellency. Furthermore, the adhesion of contaminating particles is reduced. Based on experimental data carried out on microscopically smooth (Fagus sylvatica L., Gnetum gnemon L., Heliconia densiflora Verlot, Magnolia grandiflora L.) and rough water-repellent plants (Brassica oleracea L., Colocasia esculenta (L.) Schott., Mutisia decurrens Cav., Nelumbo nucifera Gaertn.), it is shown here for the first time that the interdependence between surface roughness, reduced particle adhesion and water repellency is the keystone in the self-cleaning mechanism of many biological surfaces. The plants were artificially contaminated with various particles and subsequently subjected to artificial rinsing by sprinkler or fog generator. In the case of water-repellent leaves, the particles were removed completely by water droplets that rolled off the surfaces independent of their chemical nature or size. The leaves of N. nucifera afford an impressive demonstration of this effect, which is, therefore, called the \"Lotus-Effect\" and which may be of great biological and technological importance.
Publisher
Springer-Verlag,Springer
Subject
/ AGUA
/ Biological and medical sciences
/ carbides
/ Cells, cell elements: structure and function
/ CERAS
/ CIRE
/ droplets
/ EAU
/ FEUILLE
/ Fog
/ Fundamental and applied biological sciences. Psychology
/ HOJAS
/ LEAVES
/ MAGNOLIA
/ Plant physiology and development
/ Plants
/ Spores
/ surfaces
/ WATER
/ WAXES
