Remember the morphing robot T-1000 from the film Terminator 2? Could something like that ever become a reality? The folks at DARPA apparently think so. Last week they issued a request for proposals on developing so-called Chemical Robots (ChemBots), which would change shape in order to squeeze through tiny gaps.
The DARPA request states that ChemBots should be "soft, flexible, mobile objects that can identify and manoeuvre through openings smaller than their static structural dimensions". It goes on to add that, "nature provides many examples of ChemBot functionality. Many soft creatures, including mice, octopi, and insects, readily traverse openings barely larger than their largest 'hard' component."
So I wonder what the best approach might be. How about using shape-memory alloys, electro-active polymers, or even rheological substances? Are there other materials that might prove useful? And what would such a thing look like?
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