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

Research output: Contribution to journalArticlepeer-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 languageEnglish
Pages (from-to)910-914
Number of pages5
JournalCarbon
Volume49
Issue number3
DOIs
StatePublished - 1 Mar 2011

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