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- Title
Low-friction nanoscale linear bearing realized from multiwall carbon nanotubes
- Authors
Cumings J; Zettl A
- Abstract
We demonstrate the controlled and reversible telescopic extension of multiwall carbon nanotubes, thus realizing ultralow-friction nanoscale linear bearings and constant-force nanosprings. Measurements performed in situ on individual custom-engineered nanotubes inside a high-resolution transmission electron microscope demonstrated the anticipated van der Waals energy-based retraction force and enabled us to place quantitative limits on the static and dynamic interwall frictional forces between nested nanotubes. Repeated extension and retraction of telescoping nanotube segments revealed no wear or fatigue on the atomic scale. Hence, these nanotubes may constitute near perfect, wear-free surfaces.
- Publication
Science (New York, N.Y.), 2000, Vol 289, Issue 5479, p602
- ISSN
1095-9203
- Publication type
Journal Article
- DOI
10.1126/science.289.5479.602