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December 21st, 2006
Gecko nanotechnology
Abstract:
Animals that cling to walls and walk on ceilings owe this ability to micro- and nanoscale attachment elements. The highest adhesion forces are encountered in geckos. A gecko is the heaviest animal that can ‘stand' on a ceiling, with its feet over its head. This is why scientists are intensely researching the adhesive system of the tiny hairs on its feet. On the sole of a gecko's toes there are some one billion tiny adhesive hairs, about 200 nanometers in both width and length. These hairs put the gecko in direct physical contact with its environment. The shape of the fibers is also significant; for example, spatula-shaped ends on the hairs provide particularly strong adhesion. Researching how insect and gecko feet have evolved to optimize adhesion strength is leading to bio-inspired development of artificial dry adhesive systems. Potential applications range from protective foil for delicate glasses to reusable adhesive fixtures - say goodbye to fridge magnets, here comes the hairy stuff, which will also stick to your mirror, your cupboard and your windows.
Source:
nanowerk.com
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