Identifying individual single-walled and double-walled carbon nanotubes by atomic force microscopy.
basic_science · Level V
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- Record sourced from PubMed, PMID 18811211.
- Also identified by DOI 10.1021/nl801106p.
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Abstract
We show that the number of concentric graphene cylinders forming a carbon nanotube can be found by squeezing the tube between an atomic force microscope tip and a silicon substrate. The compressed height of a single-walled nanotube (double-walled nanotube) is approximately two (four) times the interlayer spacing of graphite. Measured compression forces are consistent with the predicted bending modulus of graphene and provide a mechanical signature for identifying individual single-walled and double-walled nanotubes.