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Measurement of Complex Impedance of Individual Metallic Carbon Nanotubes

Published

Author(s)

Jan Obrzut, Kalman D. Migler, 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

Citation

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 April 14, 2024)
Created May 3, 2007, Updated February 19, 2017