Table 1 Increase in equilibrium layer spacing ∆d, interlayer binding energy (E B ) and interface energy (E i ) of AB bilayer graphene with and without dissociated water molecules. The number of graphene unit cells initially covered by water molecules is designated as surface coverage.

From: Roles of sliding-induced defects and dissociated water molecules on low friction of graphene

Structures

Surface coverage

Increase in layer spacing, ∆d (Å)

Interlayer binding energy E B (J/m2)

Interface energy E i (J/m2)

Pristine graphene

0

0

0.30

0.34

OH-MG-H/H-MG-OH

1/36

0.06

0.28

1.19

O-MG-H/H-MG-O

1/36

0.07

0.27

0.88

H-MG-O/O-MG-H

1/36

0.15

0.21

0.94

H-MG-O/H-MG-O

1/36

0.07

0.27

0.89

H-MG-OH/OH-MG-H

1/36

0.26

0.24

1.09

OH-MG-H/OH-MG-H

1/36

0.10

0.28

1.18

OH-MG-H/OH-MG-H

1/16

0.25

0.26

1.0

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