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Some plants show contact angles up to 160° and are called ultrahydrophobic, meaning that only 2–3% of the surface of a droplet (of typical size) is in contact. Plants with a double structured surface like the lotus can reach a contact angle of 170°, whereby the droplet's contact area is only 0.6%. All this leads to a self-cleaning effect.
The contact angles of a water droplet on an ultrahydrophobic material exceed 150°. [1] This is also referred to as the lotus effect, after the superhydrophobic leaves of the lotus plant. A droplet striking these kinds of surfaces can fully rebound like an elastic ball. [2]
The leaves of Nelumbo are highly water-repellent (i.e. they exhibit ultrahydrophobicity) and have given the name to what is called the lotus effect. [3] Ultrahydrophobicity involves two criteria: a very high water contact angle between the droplet of water and the leaf surface, and a very low roll-off angle. [4]
A water drop on a lotus plant leaf. Superhydrophobic surfaces, such as the leaves of the lotus plant, are those that are extremely difficult to wet. The contact angles of a water droplet exceeds 150°. [6] This is referred to as the lotus effect, and is primarily a chemical property related to interfacial tension, rather than a chemical ...
The sacred lotus flower is an aquatic perennial plant that typically blooms vibrant petals of pink and white shades. It is one of the most beautiful plants to look at, but the lotus flower thrives ...
With small tilting angles, water droplets on the leaf roll off and take any dirt or contaminant along, leading to self-cleaning. [18] The ability of drops to form and roll off, depends not only on hydrophobicity, but also on contact angle hysteresis. In plants world, the lotus leaf is not the only example of natural superhydrophobic surfaces.
The lotus flower has a rich, layered meaning that dates back centuries and spans ayurveda to art history. Learn why the lotus flower is such a powerful symbol.
Lotus plant Carpellary receptacle of lotus. The lotus roots are planted in pond or river bottom soil, while the leaves float on the water's surface or are held well above it. The leaf stalks (petioles) can be up to 200 cm (6 ft 7 in) long, allowing the plant to grow in water to that depth. [8]