Many thanks for your help .
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, the term 'lotus-effect' describes the
syndrom of superhydrophobicity (which means that the contact angle of a water
droplet is at least 150°), but there are different structures within the Araceae
and other plant families, that produce this effect.
> Date: Wed, 12 Jan 2011 13:04:17 -0500
> To: email@example.com
Subject: Re: [Aroid-l] lotus effect with Colocasia fallax
> The lotus effect is quite common in my experience.
It has been getting
> a lot of attention in the popular press lately and
there are a number
> of academic studies of the phenomenon using nano
materials. A Google
> search will turn up many hits.
of the best displays can be seen on the humble aroid Pistia.
> Leaves of
Pistia will support quite a large water droplet with no
> wetting of the
leaf surface that supports the hairs.
> Ted Held.
> 2011/1/11 Geneviève Ferry
> > Dear aroiders ,
> Today, three students came looking leaves Colocasia fallax to understand
> > phenomenon of superhydrobicity (lotus effect).
> > Do
you have information on this phenomenon?
> > (Experience, etc.
> > Thank you for your help.
> Best wishes ,
> > Geneviève Ferry
> > Aroid-L mailing
> > Aroid-L@www.gizmoworks.com