1997
DOI: 10.1021/cm960556e
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Direct Measurement of the Adhesion and Friction of Smooth C60 Surfaces

Abstract: Using a surface forces apparatus, measurements were made of the static adhesion and dynamic friction forces between two smooth solid crystalline surfaces of C60 deposited as uniform layers on mica substrates. Between molecularly smooth surfaces, the surface energy (adhesion energy per unit area) was unusually low, whereas the static friction force was very high. However, the kinetic friction force between both smooth and rough C60 surfaces was “normal”, and the same as previously measured between rough surface… Show more

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Cited by 44 publications
(30 citation statements)
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“…Labille et al used X-ray diffraction to study nanoparticles of C 60 that were prepared by prolonged stirring of bulks solids in water, and proposed that nanoparticles of C 60 are formed by an erosion of large C 60 crystals, which occurs preferentially via (111) lattice plane exfoliation19. The adhesion energy between smooth C 60 surfaces is an order of magnitude lower than that of typical van der Waals solids20. This is ascribed to structural features of the C 60 molecule including a large size, rigidity and smooth surface, which makes the C 60 molecule behave like a macroscopic spherical object rather than a conventional molecule20.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Labille et al used X-ray diffraction to study nanoparticles of C 60 that were prepared by prolonged stirring of bulks solids in water, and proposed that nanoparticles of C 60 are formed by an erosion of large C 60 crystals, which occurs preferentially via (111) lattice plane exfoliation19. The adhesion energy between smooth C 60 surfaces is an order of magnitude lower than that of typical van der Waals solids20. This is ascribed to structural features of the C 60 molecule including a large size, rigidity and smooth surface, which makes the C 60 molecule behave like a macroscopic spherical object rather than a conventional molecule20.…”
Section: Discussionmentioning
confidence: 99%
“…The adhesion energy between smooth C 60 surfaces is an order of magnitude lower than that of typical van der Waals solids20. This is ascribed to structural features of the C 60 molecule including a large size, rigidity and smooth surface, which makes the C 60 molecule behave like a macroscopic spherical object rather than a conventional molecule20. Shear stress exerted by fingertips or a screw cap may be sufficient enough to overcome the low adhesion energy to induce exfoliation.…”
Section: Discussionmentioning
confidence: 99%
“…The SAMs with apolar terminal groups generally possess lower surface energy and relatively weak interaction between two sliding surfaces, which result in a lower adhesion and less energy loss leading to a lower friction force (Liu et al, 1996;Zhang et al, 2002). However, although the surface energy of -CF 3 (12.9 mJ/m 2 ) is lower than that of -CH 3 (~24 mJ/m 2 ) (Bushan et al, 2005;Luengo et al, 1997), the fluorocarbon SAMs produce higher friction in AFM studies (Bushan et al, 2005;Kim et al, 1997;Peach et al, 1996;Houston et al, 2005). The unexpected higher friction is attributed to the larger size and higher electronegativity of the fluorine atom, which result in two major variations in the surface properties of SAMs (Kim et al, 1997).…”
Section: The Influence Of Tail Groupsmentioning
confidence: 99%
“…The chemical-related forces might play an important role to the adhesion for the mated surfaces made of the same or similar materials. In other words, the adhesion between Si 3 N 4 tip and silicon surface might close related to their high pair interaction (a high pair interaction means that the mated molecules or the atoms are sitting deeply inside their potential well of electron cloud [35]), while it would have little contribution to the adhesion of the PEI film, since the PEI film and the Si 3 N 4 tip are very different in nature. Thus, the PEI film could also considerably decrease the adhesion of the silicon surface, although it still possesses a strong hydrophilic property.…”
Section: Micro-tribological Behaviorsmentioning
confidence: 99%