Dielectric spectroscopy, also known as electrical impedance spectroscopy (EIS), is an analytical technique used to study the dielectric properties of materials over a range of frequencies. It involves applying an alternating current (AC) electric field to a sample and measuring how the sample responds, specifically how it polarizes and interacts with the electric field. The response information can provide insights into various physical and chemical properties of the material, including molecular mobility, conductivity, and phase transitions.
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