In search for a material

From: DJ (jkprorelations_at_hotmail.com)
Date: 03/16/05 

Date: 16 Mar 2005 08:29:59 -0800

Hi list,

I'm in need for your informed and knowledgeable advise. I would like
to know what would be the closest thing to a material that the
following behaviour: it should be a photoreactive (ideally!!!),
electroreactive, magnetoreactive... material that in environmental
conditions is either soft or fluid and once stimulated (light,
electric or magnetic field...) it either becomes sensibly harder
and/or swells. It is also a requirement that once the stimulus is
removed the material returns to its previous state.

Any pointers will be greatly appreciated.

Many thanks in advance

Johan Kildal