On a different approach toward low-frequency dielectric spectroscopy measurements of conductive liquids

Driven by recent interest in the low-frequency Debye-like relaxations in hydrogen bonding liquids, here we present an alternative method for measuring such relaxations without the detrimental effects of ionic conductivity or electrode polarization. Glycerol was chosen as a molecule of interest, and...

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Veröffentlicht in:Review of scientific instruments 2013-08, Vol.84 (8), p.085109-085109
Hauptverfasser: Woodward, W H Hunter, Pasztor, Jr, Andrew J, Chatterjee, Tirtha, Nakatani, Alan I
Format: Artikel
Sprache:eng
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Zusammenfassung:Driven by recent interest in the low-frequency Debye-like relaxations in hydrogen bonding liquids, here we present an alternative method for measuring such relaxations without the detrimental effects of ionic conductivity or electrode polarization. Glycerol was chosen as a molecule of interest, and a fit for the α-transition using the Vogel-Fulcher-Tammann equation was found to be τ = 2.31 × 10(-14) exp(2110 K∕[T-135 K]). This method is easily adaptable by most laboratories with existing dielectric spectrometers, and could prove useful in the accurate measurement of relaxations in conductive media at low frequencies. A brief summary of comparable techniques is also presented.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4817312