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Mechanical properties of nanotubes and nanorods, such as elastic modulus and fracture strength, can be probed by using the lateral force sensing capabilities of the microscope to measure force versus displacement curves (E. W. Wong, P. E Sheehan, C M. Lieber, unpublished results).
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We thank J. Liu and J Huang for help in the design and fabrication of the electronics used in these measurements C.M L. acknowledges partial support of this work by the Materials Research Science and Engineering Center of the National Science Foundation under award DMR-9400396 and by the Office of Naval Research
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