Frictional anisotropy of oriented carbon nanotube surfaces

This report examines highly anisotropic tribological behavior of multi-walled nanotube films oriented in mutually orthogonal directions. The average values of coefficient of friction varied from extremely high values (μ=0.795) for vertically aligned nanotubes grown on rigid substrates to very low va...

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Bibliographic Details
Published in:Tribology letters 2005-01, Vol.18 (1), p.59-62
Main Authors: Dickrell, P.L., Sinnott, S.B., Hahn, D.W., Raravikar, N.R., Schadler, L.S., Ajayan, P.M., Sawyer, W.G.
Format: Article
Language:English
Subjects:
Anisotropy
Carbon nanotubes
Coefficient of friction
Extreme values
Substrates
Tribology
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Summary:This report examines highly anisotropic tribological behavior of multi-walled nanotube films oriented in mutually orthogonal directions. The average values of coefficient of friction varied from extremely high values (μ=0.795) for vertically aligned nanotubes grown on rigid substrates to very low values (μ=0.090) for nanotubes dispersed flat on the same substrates. The results were insensitive to humidity, in contrast to graphite materials, and indicate that nanotubes could be utilized as both low and high frictional surfaces.
ISSN:1023-8883
1573-2711
DOI:10.1007/s11249-004-1752-0