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新研究揭秘壁虎为何如此有粘附性

2014-08-14    来源:English.news.cn    【      美国外教 在线口语培训
众所周知,壁虎的附着能力是极强的。那么,我们一起来看一看是为什么吧。
 
New study finds geckos' secret of being super sticky
 
Geckos’ remarkable ability to adhere to any surface attributes to toe hairs they use to quickly turn on and off feet stickiness, a new research finds.
 
The research,published on Tuesday’s Journal of Applied Physics, explained how geckos use tiny, branched hairs in theirs toes, called “seta”, to scale vertical walls and even hang upside down.
 
It’s geckos' incredible synergy of the flexibility, angle and extensibility of the toe hairs that makes it possible, said the study lead author Alex Greaney, a professor of engineering at Oregon State University in Corvallis.
 


The system makes it possible for geckos to stick and unstick their feet so quickly that they can scurry across surfaces at 20 body lengths per second.
 
Gecko toes are well-studied. Since the time of the ancient Greeks, people have wondered how geckos are able to stick to walls, said Alex Greaney.
 
It was only in 2000 that U.S. bionicist Kellar Autumn and colleagues proved unequivocally that geckos stick using van der Waals forces,a type of physical bond that happens when electrons from the gecko hair molecules and electrons from the wall molecules interact with each other and create an electromagnetic attraction.
 
Geckos’ amazing sticky properties have inspired some incredible technology, such as stitch-free ways to seal wounds and sticky hand-held paddles that may help soldiers scale walls someday.(English.news.cn)
 
adhere to 坚持;粘附;拥护,追随
 
vertical wall 直墙


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