Torsional response and stiffening of individual multi-walled carbon nanotubes

Abstract

We report on the characterization of torsional oscillators which use multi-walled carbon nanotubes as the spring elements. Through atomic-force-microscope force-distance measurements we are able to apply torsional strains to the nanotubes and measure their torsional spring constants and effective shear moduli. We find that the effective shear moduli cover a broad range, with the largest values near the theoretically predicted value. The data also suggest that the nanotubes are stiffened by repeated flexing.

4 pages

References in corpus (2)

• A nanomechanical resonator shuttling single electrons at radio frequencies
• Quantum dots in suspended single-wall carbon nanotubes

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