HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Binding and interlayer force in the near-contact region of two graphite slabs: Experiment and theory

Abstract : Via a novel experiment, Liu et al. [Phys. Rev. B 85, 205418 (2012)] estimated the graphite binding energy, specifically the cleavage energy, an important physical property of bulk graphite. We reexamine the data analysis and note that within the standard Lennard-Jones model employed, there are difficulties in achieving internal consistency in the reproduction of the graphite elastic properties. By employing similar models which guarantee consistency with the elastic constant, we find a wide range of model dependent binding energy values from the same experimental data. We attribute some of the difficulties in the determination of the binding energy to: (i) limited theoretical understanding of the van der Waals dispersion of graphite cleavage, (ii) the mis-match between the strong bending stiffness of the graphite-SiO2 cantilever and the weak asymptotic inter-layer forces that are integrated over to produce the binding energy. We find, however, that the data do support determination of a maximum inter-layer force that is relatively model independent. We conclude that the peak force per unit area is 1.1 +/- 0.15 GPa for cleavage, and occurs at an inter-layer spacing of 0.377 +/- 0.013 nm.
Document type :
Journal articles
Complete list of metadata

Contributor : Crm2 Ul Connect in order to contact the contributor
Submitted on : Thursday, May 11, 2017 - 12:15:18 PM
Last modification on : Saturday, October 16, 2021 - 11:14:02 AM

Links full text




Tim Gould, Ze Liu, Jefferson Zhe Liu, John F. Dobson, Quanshui Zheng, et al.. Binding and interlayer force in the near-contact region of two graphite slabs: Experiment and theory. Journal of Chemical Physics, American Institute of Physics, 2013, 139 (22), ⟨10.1063/1.4839615⟩. ⟨hal-01520999⟩



Record views