Dielectric Spectroscopy at High Electric Fields

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The field of nonlinear dielectric effects started with Debye's work on dielectric saturation. The signature of this effect is a reduction of the dielectric constant, ϵ, with increasing electric field. The work of Piekara added the so-called "chemical effect", an increase in ϵ that originates from an equilibrium of two species with different dipole moments. More recently, dielectric hole burning and similar techniques based on high ac fields demonstrated that the energy absorbed from a field can accelerate dynamics, even for isothermal conditions. For strong static (dc) fields, the dynamics of polar liquids can become slower relative to the field free case. Thus, depending of the type of field applied, these reversible field effects can lead to amplitudes increasing or decreasing, and to the loss spectrum being shifted to the left or right along the logarithmic frequency scale. Additionally, crystallization outcomes can be modified by static fields of moderate amplitude.

Original languageEnglish (US)
Title of host publicationACS Symposium Series
EditorsWilliam Henry Hunter Woodward
PublisherAmerican Chemical Society
Pages91-104
Number of pages14
DOIs
StatePublished - 2021
Externally publishedYes

Publication series

NameACS Symposium Series
Volume1375
ISSN (Print)0097-6156
ISSN (Electronic)1947-5918

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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