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100 lines
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From fork-admin@xent.com Wed Aug 28 18:38:58 2002
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<FoRK@xent.com>; Wed, 28 Aug 2002 10:36:16 -0700 (PDT)
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From: "Jim Whitehead" <ejw@cse.ucsc.edu>
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To: "FoRK" <FoRK@xent.com>
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Subject: RE: Gecko adhesion finally sussed.
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Date: Wed, 28 Aug 2002 10:34:04 -0700
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Great, this is half of what I'd need to become Spider Man! Now all I need to
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figure out is how to do that spider web shooting thing.
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- Jim
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> -----Original Message-----
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> From: fork-admin@xent.com [mailto:fork-admin@xent.com]On Behalf Of
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> Eirikur Hallgrimsson
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> Sent: Monday, August 26, 2002 10:24 PM
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> To: FoRK
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> Subject: Gecko adhesion finally sussed.
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>
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>
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> (Via Robot Wisdom) Maybe you UC folk know these people?
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>
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> http://www.eurekalert.org/pub_releases/2002-08/lcc-sph082202.php
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>
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> Working at Lewis & Clark College, the University of California at
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> Berkeley,
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> the University of California at Santa Barbara, and Stanford University,
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> the interdisciplinary team:
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>
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> * confirmed speculation that the gecko's amazing climbing ability
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> depends on weak molecular attractive forces called van der Waals forces,
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>
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> * rejected a competing model based on the adhesion chemistry of water
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> molecules, and
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>
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> * discovered that the gecko's adhesive depends on geometry, not surface
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> chemistry. In other words, the size and shape of the tips of gecko foot
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> hairs--not what they are made of--determine the gecko's stickiness.
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>
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> To verify its experimental and theoretical results, the gecko group then
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> used its new data to fabricate prototype synthetic foot-hair tips
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> from two
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> different materials.
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>
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> "Both artificial setal tips stuck as predicted," notes Autumn, assistant
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> professor of biology at Lewis & Clark College in Portland, Ore. "Our
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> initial prototypes open the door to manufacturing the first biologically
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> inspired dry, adhesive microstructures, which can have widespread
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> applications."
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