Temperature-dependent electrical properties of dilute suspensions of carbon nanotubes in nematic liquid crystals

Bo Ru Jian; Chen Yu Tang; Wei Lee

doi:10.1016/j.carbon.2010.11.001

Temperature-dependent electrical properties of dilute suspensions of carbon nanotubes in nematic liquid crystals

Bo Ru Jian, Chen Yu Tang, Wei Lee^*

^*Corresponding author for this work

Institute of Imaging and Biomedical Photonics

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

Dielectric spectroscopy was used in a frequency-dependent study of pristine nematic liquid crystals (E7) and E7 doped with multi-walled carbon nanotubes. The experiment was carried out in the frequency range of 10^-1-10 ⁵ Hz and temperature range of 303-353 K. The low-frequency (1-10 ² Hz) data reflect the electrode polarization due to space-charge polarization dictated by both the concentration and diffusion constant of impurity ions and, thus, are particularly useful for interpretation of the dopant effect on the ion transport. It was found that the activation energy for ionic diffusion is slightly higher and the diffusion constant significantly smaller in the suspensions.

Original language	English
Pages (from-to)	910-914
Number of pages	5
Journal	Carbon
Volume	49
Issue number	3
DOIs	https://doi.org/10.1016/j.carbon.2010.11.001
State	Published - 1 Mar 2011

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abstract = "Dielectric spectroscopy was used in a frequency-dependent study of pristine nematic liquid crystals (E7) and E7 doped with multi-walled carbon nanotubes. The experiment was carried out in the frequency range of 10-1-10 5 Hz and temperature range of 303-353 K. The low-frequency (1-10 2 Hz) data reflect the electrode polarization due to space-charge polarization dictated by both the concentration and diffusion constant of impurity ions and, thus, are particularly useful for interpretation of the dopant effect on the ion transport. It was found that the activation energy for ionic diffusion is slightly higher and the diffusion constant significantly smaller in the suspensions.",

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AU - Jian, Bo Ru

AU - Tang, Chen Yu

AU - Lee, Wei

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N2 - Dielectric spectroscopy was used in a frequency-dependent study of pristine nematic liquid crystals (E7) and E7 doped with multi-walled carbon nanotubes. The experiment was carried out in the frequency range of 10-1-10 5 Hz and temperature range of 303-353 K. The low-frequency (1-10 2 Hz) data reflect the electrode polarization due to space-charge polarization dictated by both the concentration and diffusion constant of impurity ions and, thus, are particularly useful for interpretation of the dopant effect on the ion transport. It was found that the activation energy for ionic diffusion is slightly higher and the diffusion constant significantly smaller in the suspensions.

AB - Dielectric spectroscopy was used in a frequency-dependent study of pristine nematic liquid crystals (E7) and E7 doped with multi-walled carbon nanotubes. The experiment was carried out in the frequency range of 10-1-10 5 Hz and temperature range of 303-353 K. The low-frequency (1-10 2 Hz) data reflect the electrode polarization due to space-charge polarization dictated by both the concentration and diffusion constant of impurity ions and, thus, are particularly useful for interpretation of the dopant effect on the ion transport. It was found that the activation energy for ionic diffusion is slightly higher and the diffusion constant significantly smaller in the suspensions.

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Temperature-dependent electrical properties of dilute suspensions of carbon nanotubes in nematic liquid crystals

Abstract

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