Re: lotus effect with Colocasia fallax

Hi Ted,

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.

David Broederbauer

> Date: Wed, 12 Jan 2011 13:04:17 -0500
> From: oppenhauser2001@gmail.com
> To: aroid-l@www.gizmoworks.com
> Subject: Re: [Aroid-l] lotus effect with Colocasia fallax
>
> Geneviève,
>
> 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.
>
> One 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.
> Detroit
>
> 2011/1/11 Geneviève Ferry <jpcferry2@wanadoo.fr>:
> > Dear aroiders ,
> >
> > Today, three students came looking leaves Colocasia fallax to understand the
> > phenomenon of superhydrobicity (lotus effect).
> > Do you have information on this phenomenon?
> > (Experience, etc. ....)
> >
> > Thank you for your help.
> >
> > Best wishes ,
> >
> > Geneviève Ferry
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> >
> >
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