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Observation of High-Speed Microscale Superlubricity in Graphite
Abstract
A sheared microscopic graphite mesa retracts spontaneously to minimize interfacial energy. Using an optical knife-edge technique, we report first measurements of the speeds of such self-retracting motion (SRM) from the mm/s range at room temperature to 25 m/s at 235°C [corrected]. This remarkably high speed is comparable with the upper theoretical limit found for sliding interfaces exhibiting structural superlubricity. We observe a strong temperature dependence of SRM speed which is consistent with a thermally activated mechanism of translational motion that involves successive pinning and depinning events at interfacial defects. The activation energy for depinning is estimated to be 0.1-1 eV.
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Cites
The shear properties of Langmuir—Blodgett layers
Briscoe, B. J., & Evans, D. C. B. (1982) · Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences · doi:10.1098/rspa.1982.0048 · Cited by 411
Cited by
Structural superlubricity and ultralow friction across the length scales
Hod, O., Meyer, E., Zheng, Q., & Urbakh, M. (2018) · Nature · doi:10.1038/s41586-018-0704-z · Cited by 678
Self-citationRobust microscale superlubricity in graphite/hexagonal boron nitride layered heterojunctions
Song, Y., Mandelli, D., Hod, O., Urbakh, M., Ma, M., & Zheng, Q. (2018) · Nature Materials · doi:10.1038/s41563-018-0144-z · Cited by 494
Self-citationTribology of two-dimensional materials: From mechanisms to modulating strategies
Zhang, S., Ma, T., Erdemir, A., & Li, Q. (2019) · Materials Today · doi:10.1016/j.mattod.2018.12.002 · Cited by 407
Measurement of the cleavage energy of graphite
Wang, W., Dai, S., Li, X., Yang, J., Srolovitz, D. J., & Zheng, Q. (2015) · Nature Communications · doi:10.1038/ncomms8853 · Cited by 368
Self-citationSuperlubricity of carbon nanostructures
Chen, X., & Li, J. (2020) · Carbon · doi:10.1016/j.carbon.2019.11.077 · Cited by 264
Metadata
- Authors
- Yang, J., Liu, Z., Grey, F., Xu, Z., Li, X., Liu, Y., Urbakh, M., Cheng, Y., & Zheng, Q.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2013-06-20
- Volume
- 110
- Issue
- 25
- Pages
- 255504-255504
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2075835715
- Cited by
- 176
- References
- 1
- FWCI
- 5.83
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yang, J., Liu, Z., Grey, F., Xu, Z., Li, X., Liu, Y., Urbakh, M., Cheng, Y., & Zheng, Q. (2013). Observation of High-Speed Microscale Superlubricity in Graphite. Physical Review Letters. https://doi.org/10.1103/physrevlett.110.255504
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