TY - CHAP
T1 - Dielectric Spectroscopy at High Electric Fields
AU - Richert, Ranko
N1 - Publisher Copyright:
© 2021 American Chemical Society. All rights reserved.
PY - 2021
Y1 - 2021
N2 - 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.
AB - 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.
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U2 - 10.1021/bk-2021-1375.ch004
DO - 10.1021/bk-2021-1375.ch004
M3 - Chapter
AN - SCOPUS:85106989278
T3 - ACS Symposium Series
SP - 91
EP - 104
BT - ACS Symposium Series
A2 - Woodward, William Henry Hunter
PB - American Chemical Society
ER -