Journal
SCIENCE
Volume 351, Issue 6276, Pages 957-961Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aad3569
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Funding
- Japan Science and Technology Agency PRESTO program, under the project Molecular technology and creation of new function
- National Center of Competence in Research Nanoscale Science program
- Swiss National Science Foundation [CRSII2 136287/1]
- Swiss Nanoscience Institute
- COST (European Cooperation in Science and Technology) Action [MP1303]
- European Commission, under the Graphene Flagship [CNECT-ICT-604391]
- U.S. Office of Naval Research Basic Research Challenge program
- Comunidad de Madrid under the MAD2D-CM [S2013/MIT-3007]
- Partnership for Advanced Computing in Europe [2012071262]
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The state of vanishing friction known as superlubricity has important applications for energy saving and increasing the lifetime of devices. Superlubricity, as detected with atomic force microscopy, appears when sliding large graphite flakes or gold nanoclusters across surfaces, for example. However, the origin of the behavior is poorly understood because of the lack of a controllable nanocontact. We demonstrated the superlubricity of graphene nanoribbons when sliding on gold with a joint experimental and computational approach. The atomically well-defined contact allows us to trace the origin of superlubricity, unraveling the role played by ribbon size and elasticity, as well as by surface reconstruction. Our results pave the way to the scale-up of superlubricity and thus to the realization of frictionless coatings.
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