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Microwave impedance spectroscopy of dense carbon nanotube bundles.

Publication ,  Journal Article
Tselev, A; Woodson, M; Qian, C; Liu, J
Published in: Nano letters
January 2008

We have performed impedance spectroscopy of dense carbon nanotube (CNT) bundles in the broad frequency range from 10 MHz to 67 GHz. Dense CNT bundles were formed on sharp tips from aqueous suspension by ac dielectrophoresis and incorporated into on-wafer test structures. The frequency response of the bundles can be fit to a model with frequency-independent elements in the entire frequency range up to 67 GHz strongly suggesting that CNT properties do not depend on the frequency throughout the whole frequency range. The measurements at microwave frequencies allowed separate characterization of the bundle/metal electrode contacts and the bundle bulk. Effects of different CNT fabrication and suspension processing routes on bundle characteristics were identified. We have also made a preliminary estimation of the average inductance per current carrying shell in the bundles. For good quality nanotube bundles, the inductance has been found to fall within the range from approximately 3.5 to 40 nH/microm. With decreasing nanotube quality, the implemented estimation procedure yields higher values with a large uncertainty. Systematic measurements of devices with individual nanotubes are required to provide more accurate data.

Duke Scholars

Published In

Nano letters

DOI

EISSN

1530-6992

ISSN

1530-6984

Publication Date

January 2008

Volume

8

Issue

1

Start / End Page

152 / 156

Related Subject Headings

  • Nanoscience & Nanotechnology
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Tselev, A., Woodson, M., Qian, C., & Liu, J. (2008). Microwave impedance spectroscopy of dense carbon nanotube bundles. Nano Letters, 8(1), 152–156. https://doi.org/10.1021/nl072315j
Tselev, Alexander, Michael Woodson, Cheng Qian, and Jie Liu. “Microwave impedance spectroscopy of dense carbon nanotube bundles.Nano Letters 8, no. 1 (January 2008): 152–56. https://doi.org/10.1021/nl072315j.
Tselev A, Woodson M, Qian C, Liu J. Microwave impedance spectroscopy of dense carbon nanotube bundles. Nano letters. 2008 Jan;8(1):152–6.
Tselev, Alexander, et al. “Microwave impedance spectroscopy of dense carbon nanotube bundles.Nano Letters, vol. 8, no. 1, Jan. 2008, pp. 152–56. Epmc, doi:10.1021/nl072315j.
Tselev A, Woodson M, Qian C, Liu J. Microwave impedance spectroscopy of dense carbon nanotube bundles. Nano letters. 2008 Jan;8(1):152–156.
Journal cover image

Published In

Nano letters

DOI

EISSN

1530-6992

ISSN

1530-6984

Publication Date

January 2008

Volume

8

Issue

1

Start / End Page

152 / 156

Related Subject Headings

  • Nanoscience & Nanotechnology