late 13c., "restorative powers of the body, bodily processes; powers of growth;" from Old French nature "nature, being, principle of life; character, essence," from Latin natura "course of things; natural character, constitution, quality; the universe," literally "birth," from natus "born," past participle of nasci "to be born," from PIE *gene- "to give birth, beget" (see genus ).
From late 14c. as "creation, the universe;" also "heredity, birth, hereditary circumstance; essential qualities, innate disposition" (. human nature ); "nature personified, Mother Nature." Specifically as "material world beyond human civilization or society" from 1660s. Nature and nurture have been contrasted since 1874. Nature should be avoided in such vague expressions as 'a lover of nature,' 'poems about nature.' Unless more specific statements follow, the reader cannot tell whether the poems have to do with natural scenery, rural life, the sunset, the untouched wilderness, or the habits of squirrels." [Strunk & White, "The Elements of Style," 3rd ed., 1979]
For reasons that are still under investigation, only a limited set of surfaces exhibit the theoretically predicted electrowetting behavior. Because of this, alternative materials that can be used to coat and functionalize the surface are used to create the expected wetting behavior. For example, amorphous fluoropolymers are widely used electrowetting coating materials, and it has been found that the behavior of these fluoropolymers can be enhanced by the appropriate surface patterning. These fluoropolymers coat the necessary conductive electrode, typically made of aluminum foil or indium tin oxide (ITO), to create the desired electrowetting properties.  Three types of such polymers are commercially available: FluoroPel hydrophobic and superhydrophobic V-series polymers are sold by Cytonix , CYTOP is sold by Asahi Glass Co. , and Teflon AF is sold by DuPont . Other surface materials such as SiO2 and gold on glass have been used.   These materials allow the surfaces themselves to act as the ground electrodes for the electric current.