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Hydrophobe print that page


Superhydrophobicity Main article: Superhydrophobe 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° and the roll-off angle is less

Superhydrophobe print that page


In 1805, Thomas Young defined the contact angle θ by analyzing the forces acting on a fluid droplet resting on a solid surface surrounded by a gas. [ 2 ] A liquid droplet rests on a solid surface and is surrounded by gas. The contact angle, θ C , is the angle formed by a liquid at the

Environmental scanning electron microscope print that page


The environmental scanning electron microscope or ESEM is a scanning electron microscope (SEM) that allows for the option of collecting electron micrographs of specimens that are "wet," uncoated, or both by allowing for a gaseous environment in the specimen chamber. Piece of a crystallized

Antimicrobial surfaces print that page

Grafting Polymers Onto and/or From Surfaces Grafting Onto Grafting From 2.2.2 Superhydrophobic Surfaces Fluorocarbons | 2011/9/22 16:38:04

Anti-graffiti coating print that page


An anti-graffiti coating is a coating that prevents graffiti paint from sticking to surfaces. Cleaning graffiti off buildings costs billions of dollars annually. Many cities have started anti-graffiti programs but vandalism is still a problem. Companies across the globe are attempting

Wetting print that page


water , a wettable surface may also be termed hydrophilic and a non-wettable surface hydrophobic . Superhydrophobic surfaces have contact angles greater than 150°, showing almost no contact between the liquid drop and the surface. This is sometimes referred to as the " Lotus effect ". The

Electrowetting print that page

The electrowetting behavior of mercury and other liquids on variably charged surfaces was probably first explained by Gabriel Lippmann in 1875 and was certainly observed much earlier. Froumkin used surface charge to change the shape of water drops in 1936. The term electrowetting was first | 2011/7/1 2:00:43

Contact angle print that page


with highly rough surfaces may have a water contact angle greater than 150°. These are called superhydrophobic surfaces. Sometimes the contact angle is measured through the gas instead of through the liquid, which reverses 0 and 180 in the above explanation. [ 1 ] [ 2 ] Image from a

Lotus effect print that page


experiments with glass beads coated with paraffin or PTFE telomer. The self-cleaning property of superhydrophobic micro- nanostructured surfaces was studied by Barthlott and Ehler in 1977, [ 2 ] and perfluoroalkyl and perfluoropolyether superhydrophobic materials were developed by Brown

Porous silicon print that page

Porous silicon was discovered by accident in 1956 by Arthur Uhlir Jr. and Ingeborg Uhlir at the Bell Labs in the U.S. At the time, the Ulhirs were in the process of developing a technique for polishing and shaping the surfaces of silicon and germanium . However, it was found that under several | 2011/5/19 7:09:26