The friction on a graphene surface can be dynamically tuned using external electric fields, according to researchers.
The friction on a graphene surface can be dynamically tuned using external electric fields, according to researchers at the University of Illinois Urbana-Champaign led by Professor Rosa Espinosa-Marzal of the Department of Civil and Environmental Engineering.
Graphene is the 2D form of carbon and is sometimes hailed as a"wonder material" because of its unique and superlative properties. Surfaces coated in graphene films generally exhibit very low friction, but the new results demonstrate that friction on graphene-coated surfaces can be"turned on" by exposing the surface to an electric field under the proper
"The work will be impactful in reducing energy consumption in nano- and micro-electromechanical systems, in addition to allowing dynamic control of friction while mitigating the enhanced wear and corrosion of sliding surfaces when direct bias is applied," Espinosa-Marzal said.Gus Greenwood, Jin Myung Kim, Shahriar Muhammad Nahid, Yeageun Lee, Amin Hajarian, SungWoo Nam, Rosa M. Espinosa-Marzal.
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