Dielectric behavior in the SrF2-H2O system. 2. Measurement at low temperatures

Yasushige Kuroda, Yuzo Yoshikawa, Tetsuo Morimoto, Mahiko Nagao

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Dielectric properties of water adsorbed on the SrF2 surface have been investigated under various conditions. A small relaxation was found at 33 kHz, 159 K, and a coverage of 0.74, besides a large relaxation observed at 298 K which had been described in part 1 of this series. This small relaxation is observed only when the physisorbed water molecules are present. Furthermore, the chord length of Cole-Cole plots for this relaxation is found to be a function of the coverage. These findings are interpreted in terms of the Debye-type rotational polarization of the adsorbed water and therefore confirm that the relaxation observed at 298 K is ascribed to the Maxwell-Wagner-type relaxation. An activation energy for the dipole rotation is also calculated from the variation of frequency corresponding to a maximum in the dielectric loss curve with temperature. This result suggests that the rotation of the water molecules condensed two-dimensionally is expected to be more hindered than that of bulk liquid water, though not so much as in ice. The state of two-dimensionally condensed water on SrF2 is discussed on the basis of the concept of lateral interaction.

Original languageEnglish
Pages (from-to)2173-2178
Number of pages6
JournalLangmuir
Volume11
Issue number6
Publication statusPublished - 1995
Externally publishedYes

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Water
water
Temperature
Molecules
Ice
Dielectric losses
dielectric loss
Dielectric properties
dielectric properties
molecules
ice
Activation energy
plots
Polarization
dipoles
activation energy
Liquids
curves
polarization
liquids

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Kuroda, Y., Yoshikawa, Y., Morimoto, T., & Nagao, M. (1995). Dielectric behavior in the SrF2-H2O system. 2. Measurement at low temperatures. Langmuir, 11(6), 2173-2178.

Dielectric behavior in the SrF2-H2O system. 2. Measurement at low temperatures. / Kuroda, Yasushige; Yoshikawa, Yuzo; Morimoto, Tetsuo; Nagao, Mahiko.

In: Langmuir, Vol. 11, No. 6, 1995, p. 2173-2178.

Research output: Contribution to journalArticle

Kuroda, Y, Yoshikawa, Y, Morimoto, T & Nagao, M 1995, 'Dielectric behavior in the SrF2-H2O system. 2. Measurement at low temperatures', Langmuir, vol. 11, no. 6, pp. 2173-2178.
Kuroda, Yasushige ; Yoshikawa, Yuzo ; Morimoto, Tetsuo ; Nagao, Mahiko. / Dielectric behavior in the SrF2-H2O system. 2. Measurement at low temperatures. In: Langmuir. 1995 ; Vol. 11, No. 6. pp. 2173-2178.
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