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Science: ORNL researchers tune friction in ionic solids at the nanoscale

Posted at 10:54 pm January 27, 2015
By Oak Ridge National Laboratory Leave a Comment

Friction Release

Researchers used electricity and water to control friction levels on ionic surfaces at the nanoscale. As water forms around the nanoscale electrode, it allows for further penetration into the sample surface, thereby increasing or decreasing friction. (Image courtesy ORNL)

Friction impacts motion, hence the need to control friction forces. Currently, this is accomplished by mechanistic means or lubrication, but experiments conducted by researchers at the U.S. Department of Energy’s Oak Ridge National Laboratory have uncovered a way of controlling friction on ionic surfaces at the nanoscale using electrical stimulation and ambient water vapor.

The research, which demonstrates a new physical effect, was undertaken at the Center for Nanophase Materials Sciences, a DOE Office of Science User Facility at ORNL, and is published in the journal Scientific Reports.

“Our finding can have a significant technological impact on applications for both macroscopic and nanoscale devices,” said lead author Evgheni Strelcov. “Decreasing or increasing nanoscale friction at will and thus controlling mechanical energy losses and wear of a microelectromechanical system’s parts has enormous implications for applied energy research and opens a new vista for fundamental science studies.” [Read more…]

Filed Under: Front Page News, Oak Ridge National Laboratory, Science, U.S. Department of Energy Tagged With: Alexander Tselev, Bobby Sumpter, Center for Nanophase Materials Science, Center for Nanophase Materials Sciences, Chemical Science Division, CNMS, Computer Science and Mathematics Division, electric field, electrical stimulation, Evgheni Strelcov, friction, friction forces, motion, nanoscale, Oak Ridge National Laboratory, ORNL, Rajeev Kumar, Scientific Reprots, Sergei Kalinin, U.S. Department of Energy, Vera Bocharova, water vapor

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