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Time domain dielectric spectroscopy study of biological systems (CAT#: STEM-ST-0351-WXH)
Introduction
The dielectric properties of biological systems are Tvery remarkable. They typically display extremely high dielectric permittivity at low frequencies, falling off in more or less distinct steps with increasing frequency. Their frequency dependence permits identification and investigation of a number of completely different underlying mechanisms.
Principle
The principle of this technique is to apply an AC signal of small amplitude to an electrode immersed into an electrolyte. The initial disturbance (applied) and the response of the electrode is compared by measuring the phase shift of the current and voltage components and by the measurements of their amplitudes.
Applications
Used to study the response of a sample subjected to an applied electric field of fixed or changing frequency. DS describes the dielectric properties of a material as a function of frequency.
Materials
Dielectric spectrometer
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