In Situ Resistance Measurements of Strained Carbon Nanotubes

Details In Situ Resistance Measurements of Strained Carbon Nanotubes In Situ Resistance Measurements of Strained Carbon Nanotubes

1999-05-20

arxiv.org/abs/cond-mat/9905304v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Submitted to Applied Physics Letters

Scientific paper

10.1063/1.125193

We investigate the response of multi-walled carbon nanotubes to mechanical strain applied with an Atomic Force Microscope (AFM) probe. We find that in some samples, changes in the contact resistance dominate the measured resistance change. In others, strain large enough to fracture the tube can be applied without a significant change in the contact resistance. In this case we observe that enough force is applied to break the tube without any change in resistance until the tube fails. We have also manipulated the ends of the broken tube back in contact with each other, re-establishing a finite resistance. We observe that in this broken configuration the resistance of the sample is tunable to values 15-350 kW greater than prior to breaking.

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