Superhydrophilicity refers to the phenomenon of excess hydrophilicity, or attraction to water; in superhydrophilic materials, the contact angle of water is equal to zero degrees. This effect was discovered in 1995 by the Research Institute of Toto Ltd. for titanium dioxide irradiated by sunlight. Under light irradiation, water dropped onto titanium dioxide forms no contact angle (almost 0 degrees).[1]
Superhydrophilic material has various advantages. For example, it can defog glass, and it can also enable oil spots to be swept away easily with water. Such materials are already commercialized as door mirrors for cars, coatings for buildings, self-cleaning glass, etc.[citation needed]
Several mechanisms of this superhydrophilicity have been proposed by researchers[citation needed]. One is the change of the surface structure to a metastable structure, and another is cleaning the surface by the photodecomposition of dirt such as organic compounds adsorbed on the surface, after either of which water molecules can adsorb to the surface. The mechanism is still controversial, and it is too soon to decide which suggestion is correct. To decide, atomic scale measurements and other studies will be necessary.[citation needed]
See also
[edit]- Superhydrophobicity, the opposite phenomenon
References
[edit]- ^ Fujishima, Akira (12 May 2005). "Discovery and applications of photocatalysis—Creating a comfortable future by making use of light energy". Japan Nanonet Bulletin. 44: 1–3. Archived from the original on 11 June 2008.
Further reading
[edit]- Kommireddy, Dinesh S.; Patel, Amish A.; Shutava, Tatsiana G.; Mills, David K.; Lvov, Yuri M. (1 July 2005). "Layer-by-Layer Assembly of TiO2 Nanoparticles for Stable Hydrophilic Biocompatible Coatings". Journal of Nanoscience and Nanotechnology. 5 (7): 1081–1087. doi:10.1166/jnn.2005.149. PMID 16108431.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction