Abstract
Dielectric and electrical properties of nanostructured materials are important due to their potential applications such as sensors, water treatment, energy storage, catalysis, and medical devices. The properties of nanomaterials are varying from its bulk materials due to the surface to volume ratio and the presence of defects at grain boundary region. These properties can be modified by doping, polymer-based, grain size, pH, and preparation techniques. The function of modern electronic devices is based on the electrical properties of the materials. The electrical conductivity of the materials is influenced by the applications of both dc and ac voltage. The electrical and dielectric properties can be studied simultaneously with the application of ac field by measuring the impedance varying with the frequency. The study of dielectric constant and dielectric loss as a function of temperature is highly appreciated for designing modern device fabrication. Broadband dielectric spectroscopy and Keithley instruments are used to study the dielectric and electrical properties of nanostructured materials. The results of nanostructured materials such as nanowires, nanorods, nanosheets, etc., exhibit enhanced dielectric and electrical properties compared to micro-sized particles. The aim of this chapter is to understand the mechanism behind grain and grain boundary effect and its influence on the dielectric and electrical properties of nanostructured materials.
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Gunasekaran, V., Narayanan, M., Rajagopal, G., Rajesh, J. (2022). Electrical and Dielectric Properties: Nanomaterials. In: Handbook of Magnetic Hybrid Nanoalloys and their Nanocomposites. Springer, Cham. https://doi.org/10.1007/978-3-030-34007-0_25-1
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DOI: https://doi.org/10.1007/978-3-030-34007-0_25-1
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