Carbon Nanotube Electronic Displacement Encoder with Sub-Nanometer Resolution

Authors: Jiang, H.; Yu, M.F.; Lu, J.Q.; Huang, Y.; Johnson, H.T.; Zhang, X.G.; Ferreira, P.

Source: Journal of Computational and Theoretical Nanoscience, Volume 4, Number 3, May 2007 , pp. 574-577(4)

Publisher: American Scientific Publishers

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Abstract:

Electric conductance of a telescope double-walled carbon nanotube oscillates as a function of telescoping distance. The period of such oscillation is one half of the lattice constant of graphene, a/2 = 0.123 nm, instead of the lattice constant a as expected. The halving of the period results from the combination of the periodic interlayer lattice alignment and the occurrence of antiresonance. When combined with the periodicity in the energy space at a fixed displacement, the telescopic displacement can be reliably and accurately determined to the sub-nanometer resolution. This effect can be used to design an electronic displacement encoder.

Keywords: CARBON NANOTUBE ENCODER; NANOMETROLOGY; INTERLAYER TUNNELING

Document Type: Research article

DOI: 10.1166/jctn.2007.018

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