High-resolution dielectric spectroscopy and electric-field dependence of carbon allotropes including multiwall and single-wall nanotubes

High-resolution dielectric spectroscopy and electric-field dependence of carbon allotropes including multiwall and single-wall nanotubes

High-resolution isothermal dielectric spectroscopy is reported as a function of frequency up to 105Hz and electric field Erot on four carbon allotropes; amorphous glass, diamond, multiwall nanotubes (MWNTs), and single-wall nanotubes (SWNTs). The diamond spectra are featureless while the glass, MWNT...

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Veröffentlicht in:Applied physics letters 2008-02, Vol.92 (5)
Hauptverfasser: Basu, Rajratan, Iannacchione, Germano S.
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description High-resolution isothermal dielectric spectroscopy is reported as a function of frequency up to 105Hz and electric field Erot on four carbon allotropes; amorphous glass, diamond, multiwall nanotubes (MWNTs), and single-wall nanotubes (SWNTs). The diamond spectra are featureless while the glass, MWNT, and SWNT samples exhibit two modes. A common low-frequency mode, likely due to surface space charges, is observed at ∼16Hz that decreases in dispersion strength and increases in frequency linearly with increasing Erot. A higher-frequency mode, different for each sample, is also observed having a dispersion strength and frequency independent of Erot.
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title High-resolution dielectric spectroscopy and electric-field dependence of carbon allotropes including multiwall and single-wall nanotubes
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