1887

News Picks : Electrostatic forces may play role in gecko adhesion

By: Physics Today
11 July 2014

New Scientist: It has long been thought that two primary forces were involved in the ability of geckos to cling to surfaces: van der Waals and capillary. Now researchers at the University of Waterloo in Ontario, Canada, say that a third force—contact electrification—may actually be the main source of gecko adhesion. When they dragged geckos across various surfaces, the researchers noticed that the animals’ toe pads became positively charged while the surfaces became negatively charged, indicating that electrons were shifting from one to the other. Moreover, the strength of the electrostatic force and that of the adhesion between the geckos’ feet and the surfaces were similar. The researchers conclude that electrostatic forces allow geckos to cling to ceilings much the way a balloon rubbed on hair or clothing sticks to walls.

Comments

Submit comment
Close
Comment moderation successfully completed
This is a required field
Please enter a valid email address
This feature is disabled while Scitation upgrades its access control system.
This feature is disabled while Scitation upgrades its access control system.
e0bf90919b92373893d51373e6a49b70 weblog.blogpostzxybnytfddd
Scitation: News Picks: Electrostatic forces may play role in gecko adhesion
http://aip.metastore.ingenta.com/content/aip/magazine/physicstoday/news/news-picks/electrostatic-forces-may-play-role-in-gecko-adhesion-a-news-pick-post