Obrzut, J.
, Migler, K.
, Dong, L.
and Jiao, J.
(2007),
Measurement of Complex Impedance of Individual Metallic Carbon Nanotubes, IEEE Transactions on Instrumentation and Measurement, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852765
(Accessed October 14, 2025)
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Measurement of Complex Impedance of Individual Metallic Carbon Nanotubes
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Author(s)
, , L F. Dong, J Jiao
Abstract
We describe impedance measurements of individual single wall carbon nanotubes (CNTs) in the frequency range of 40 Hz to 100 MHz. The extracted CNT capacitance of 4 10-14 F/mm, is independent of the total resistance, however the CCNT value is larger than theoretically predicted quantum capacitance of a perfect tube. We observe a sharp conductor-insulator transition at a crossover frequency above which the circuit response becomes capacitive. Our results agree qualitatively with the theoretical impedance characteristic of a perfect CNT, and furthermore, they imply that the crossover frequency due to quantum capacitance would fall in the range of about 100 GHz.Citation
IEEE Transactions on Instrumentation and Measurement
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Created May 3, 2007, Updated February 19, 2017