Ok, I have googled my little brain out on this one...
a few months ago, I saw a show (Science channel or Discovery or Learning channel or something) about materials. In the show, they glossed over a bunch of cool things like nanotubules that could be forned into the shape of a 2" block, hold up to 5 pounds and weighed like nothing and could be vacuum compressed into a pellet and stuff like that.
Anyways, one of the materials they mentioned was a elastomer/polmer/plastic that was pliable, but became rigid when a small DC current was applied. The concept was similar to how an LCD works, but rigid instead of opaque.
I need to identify what this stuff was and learn about the science behind it for semi-unrelated reasons. Does anyone have any clue what I am talking about?