Sunday, November 11, 2007

Gecko Stickability!

Story from 'Creation' magazine No. 26 No 1 2004, 'Beyond the limits of human technology' by Jonathan Sarfati B.Sc.(Hons), Ph.D., F.M.
'Dr. Andre Geim, of the University of Manchester, leading a team of scientists from the UK and Russia, prepared a self-cleaning adhesive tape modelled on the gecko's foot. Their tape, with a contact area of only 0.5 cm with a contact area of only 0.5 cm with glass, could bear a load of more than 100 grams. However, the tape is not durable enough to attach and detach more than a few times, unlike the real gecko. The researchers proposed using a more durable material - that which the real ones are made of, keratin.
If they did, then gloves and shoes made of this might enable a real spiderman (or should that be geckoman?) to climb up walls of almost any surface.
'Geckos can stick to almost any surface, so it can even run upside down on a ceiling of polished glass. This is due to the way tiny chemical forces are exploited by tiny hairs called setae, about 1 10th of a millimetre long and packed 5,000 per square millimetre. The end of each seta has about 400-1000 branches ending in a spatula-like structure....This is an amazingly fine structure that the researchers said was 'beyond the limits of human technology'.'

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