Journal
APPLIED PHYSICS LETTERS
Volume 76, Issue 20, Pages 2883-2885Publisher
AMER INST PHYSICS
DOI: 10.1063/1.126505
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Specific peaks of the Raman spectrum of single-wall nanotubes shift significantly upon immersion of the tubes in a liquid, relative to the corresponding peaks in air. This observation means that nanotubes are sensitive to molecular forces, and is interpreted by relating the corresponding molecular strain to a thermodynamic parameter, the cohesive energy density (or more loosely, the surface tension) for a range of liquids. We find that nanotubes deform by a different amount for each liquid. Calibration of this phenomenon enables the construction of a compressive stress-strain curve for carbon nanotubes. (C) 2000 American Institute of Physics. [S0003-6951(00)01920-3].
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