Re: [Aroid-l] lotus effect with Colocasia fallax

From: =?iso-8859-1?B?ZGF2aWQgYnL2ZGVyYmF1ZXI=?= <david_dav44 at hotmail.com> on 2011.01.13 at 12:53:25 Hi Ted=2C Pistia is in fact a very beautiful example for a water-repellent surface. It has to be kept in mind - as you mention - that it generates this superhydrophobic effect with hairs (not with papillate cells like in Nelumbo or Colocasia) that are covered with wax. So=2C the term 'lotus-effect' describes the syndrom of superhydrophobicity (which means that the contact angle of a water droplet is at least 150=B0)=2C but there are different structures within the Araceae and other plant families=2C that produce this effect. David Broederbauer >=3B Date: Wed=2C 12 Jan 2011 13:04:17 -0500 >=3B From: oppenhauser2001@gmail.com >=3B To: aroid-l@www.gizmoworks.com >=3B Subject: Re: [Aroid-l] lotus effect with Colocasia fallax >=3B >=3B Genevi=E8ve=2C >=3B >=3B The lotus effect is quite common in my experience. It has been getting >=3B a lot of attention in the popular press lately and there are a number >=3B of academic studies of the phenomenon using nano materials. A Google >=3B search will turn up many hits. >=3B >=3B One of the best displays can be seen on the humble aroid Pistia. >=3B Leaves of Pistia will support quite a large water droplet with no >=3B wetting of the leaf surface that supports the hairs. >=3B >=3B Ted Held. >=3B Detroit >=3B >=3B 2011/1/11 Genevi=E8ve Ferry <=3Bjpcferry2@wanadoo.fr>=3B: >=3B >=3B Dear aroiders =2C >=3B >=3B >=3B >=3B Today=2C three students came looking leaves Colocasia fallax to understand the >=3B >=3B phenomenon of superhydrobicity (lotus effect). >=3B >=3B Do you have information on this phenomenon? >=3B >=3B (Experience=2C etc. ....) >=3B >=3B >=3B >=3B Thank you for your help. >=3B >=3B >=3B >=3B Best wishes =2C >=3B >=3B >=3B >=3B Genevi=E8ve Ferry >=3B >=3B _______________________________________________ >=3B >=3B Aroid-L mailing list >=3B >=3B Aroid-L@www.gizmoworks.com >=3B >=3B http://www.gizmoworks.com/mailman/listinfo/aroid-l >=3B >=3B >=3B >=3B >=3B _______________________________________________ >=3B Aroid-L mailing list >=3B Aroid-L@www.gizmoworks.com >=3B http://www.gizmoworks.com/mailman/listinfo/aroid-l --_0b2d9375-fbdc-4bd4-9511-a284f79e2a09_-- --===============2842853695103802685==

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