Water on the surface of a lotus leaf.Water droplets on taro leaf with lotus effect (upper), and taro leaf surface magnified (0–1 is one millimetre span) showing a number of small protrusions (lower).Computer graphic of a lotus leaf surface.A water drop on a lotus surface showing contact angles of approximately 147°.
The lotus effect refers to self-cleaning properties that are a result of ultrahydrophobicity as exhibited by the leaves of Nelumbo, the lotus flower.[1] Dirt particles are picked up by water droplets due to the micro- and nanoscopic architecture on the surface, which minimizes the droplet's adhesion to that surface. Ultrahydrophobicity and self-cleaning properties are also found in other plants, such as Tropaeolum (nasturtium), Opuntia (prickly pear), Alchemilla, cane, and also on the wings of certain insects.[2]
The phenomenon of ultrahydrophobicity was first studied by Dettre and Johnson in 1964[3] using rough hydrophobic surfaces. Their work developed a theoretical model based on experiments with glass beads coated with paraffin or PTFE telomer. The self-cleaning property of ultrahydrophobic micro-nanostructured surfaces was studied by Wilhelm Barthlott and Ehler in 1977,[4] who described such self-cleaning and ultrahydrophobic properties for the first time as the "lotus effect"; perfluoroalkyl and perfluoropolyether ultrahydrophobic materials were developed by Brown in 1986 for handling chemical and biological fluids.[5] Other biotechnical applications have emerged since the 1990s.[6][7][8][9][10][11]
^Barthlott, W. (2023): “The Discovery of the Lotus Effect as a Key Innovation for Biomimetic Technologies” - in: Handbook of Self-Cleaning Surfaces and Materials: From Fundamentals to Applications, Chapter 15, pp. 359-369 - Wiley-VCH, https://doi.org/10.1002/9783527690688.ch15
^Rulon E. JohnsonJr.; Robert H. Dettre (1964). "Contact Angle Hysteresis. III. Study of an Idealized Heterogeneous Surface". J. Phys. Chem.68 (7): 1744–1750. doi:10.1021/j100789a012.
^Barthlott, Wilhelm; Ehler, N. (1977). "Raster-Elektronenmikroskopie der Epidermis-Oberflächen von Spermatophyten". Tropische und Subtropische Pflanzenwelt. 19: 110.
^Brown Laboratory vessel having hydrophobic coating and process for manufacturing same U.S. patent 5,853,894, Issued December 29, 1998
^Barthlott, Wilhelm; C. Neinhuis (1997). "The purity of sacred lotus or escape from contamination in biological surfaces". Planta. 202: 1–8. doi:10.1007/s004250050096. S2CID 37872229.
^Barthlott, W., Mail, M., Bhushan, B., & K. Koch. (2017). Plant Surfaces: Structures and Functions for Biomimetic Innovations. Nano-Micro Letters, 9(23), doi:10.1007/s40820-016-0125-1.
^Cheng, Y. T.; Rodak, D. E. (2005). "Is the lotus leaf superhydrophobic?". Appl. Phys. Lett.86 (14): 144101. Bibcode:2005ApPhL..86n4101C. doi:10.1063/1.1895487.
^Narhe, R. D.; Beysens, D. A. (2006). "Water condensation on a super-hydrophobic spike surface". Europhys. Lett.75 (1): 98–104. Bibcode:2006EL.....75...98N. doi:10.1209/epl/i2006-10069-9.
^Lai, S.C.S. "Mimicking nature: Physical basis and artificial synthesis of the Lotus effect" (PDF). Archived from the original (PDF) on 2007-09-30.
^Koch, K.; Bhushan, B.; Barthlott, W. (2008). "Diversity of structure, Morphology and Wetting of Plant Surfaces. Soft matter". Soft Matter. 4 (10): 1943. Bibcode:2008SMat....4.1943K. doi:10.1039/b804854a.
The lotuseffect refers to self-cleaning properties that are a result of ultrahydrophobicity as exhibited by the leaves of Nelumbo, the lotus flower....
Nelumbo nucifera, also known as sacred lotus, Indian lotus, or simply lotus, is one of two extant species of aquatic plant in the family Nelumbonaceae...
The LotusEffect is the third studio album by the Dutch progressive metal band Sun Caged, released on 17 June 2011 by Lion Music. The album features the...
margin. Nasturtium leaves, like some other species, demonstrate the lotuseffect, whereby rainwater falling on the surface gathers into globular droplets...
Lotus corniculatus is a flowering plant in the pea family Fabaceae, native to grasslands in temperate Eurasia and North Africa. Common names include common...
the liquid drop and the surface. This is sometimes referred to as the "Lotuseffect". The table describes varying contact angles and their corresponding...
exhibit ultrahydrophobicity) and have given the name to what is called the lotuseffect. Ultrahydrophobicity involves two criteria: a very high water contact...
wetting. A well-known example is the sacred lotus. This adaptation is not purely the physical and chemical effect of a waxy coating but depends largely on...
nucifera has particular properties of repelling water, known as the lotuseffect or ultrahydrophobicity. Among other symbolic meanings, it rises above...
covered with soft hairs, and show a high degree of water-resistance (see Lotuseffect). Green to bright chartreuse flowers are small, have no petals and appear...
exceed 150°. This is also referred to as the lotuseffect, after the superhydrophobic leaves of the lotus plant. A droplet striking these kinds of surfaces...
This effect can be visualized in the phenomenon called phase separation.[citation needed] Superhydrophobic surfaces, such as the leaves of the lotus plant...
Wright of Lotus. The Lotus 79 was the first F1 car to take full advantage of ground effects aerodynamics. Over the span of its lifetime, the Lotus 79 took...
numerous. In manufacturing of pristine clothes. Self cleaning fabrics with lotuseffect. PPE kits, aprons, coverall and gowns for healthcare workers usable in...
The Lotus 80 was a Formula One car used by Team Lotus in 1979. The car, designed by Colin Chapman, Martin Ogilvie, Peter Wright and Tony Rudd, was an...
effect. The Lotus 88 made its debut at the first practice session of the 1981 season opener, the US Grand Prix West at Long Beach. Although the Lotus...
and was the first ground effect car in Formula One. In early 1976, spurred on by a disappointing lack of pace of the ageing Lotus 72 the previous season...
(coating) was inspired by the hydrophobic properties of the lotus flower plant (the lotuseffect). The term "biomimetic" is preferred for references to chemical...
The White Lotus is an American black comedy drama anthology television series created by Mike White for HBO. It follows the guests and employees of the...
of water under specified conditions Fluid resistance, drag in water Lotuseffect (water-resistance in plant leaves) The electrical resistivity of water...
bony fishes. It also serves a role in anti-fouling by exhibiting the lotuseffect. All denticles are composed of an interior pulp cavity with a nervous...
energy than bridging the recesses expends. This so-called Wenzel-effect surface or lotuseffect surface has less contact area by an amount proportional to the...
industry, and founder of the sports car company Lotus Cars. Chapman founded Lotus in 1952 and initially ran Lotus in his spare time, assisted by a group of...
effective, as the hair causes water to roll off the plant, much like the lotuseffect. Burning is ineffective, as it only creates new bare areas for seedlings...
The Lotus Sūtra (Sanskrit: Saddharma Puṇḍarīka Sūtram, Sūtra on the White Lotus of the True Dharma, Chinese: 妙法蓮華經) is one of the most influential and...
sacred lotus (Nelumbo nucifera) have ultra-hydrophobic and self-cleaning properties that have been described by Barthlott and Neinhuis (1997). The lotus effect...
properties such as superhydrophobicity (extreme water resistance, also see "Lotuseffect"), odor and moisture elimination, increased elasticity and strength,...
Publishers. p. 119. ISBN 9788120816152. Pavel G. Somov (October 2010). The LotusEffect. New Harbinger Publications. p. 34. ISBN 9781608821389. Subhash Sharma...