Dielectric performance of graphene nanostructures prepared from naturally sourced material
Defects; Dielectric constant; Loss tangent; Pre-graphitic material; Relaxation mechanism
Cost-effective and environmentally benign approach was adopted for the synthesis of oxidized graphene nanostructures from the precursor coke via Improved Hummers' method. The surface states of oxygen functional groups provided strong polarization for enhanced dielectric properties. Occurrence of dipole and interfacial polarizations in the low frequency region contributed to the dispersive behaviour of ?', ?", and tand.The relaxation phenomenon of the structure lead to an augmented electrical conductivity with increase in frequency. Our finding reveals the advantageous fabrication of graphene nanostructure having high dielectric constant (1 0 5) but with low loss which can be used in advanced nanodielectrics. 2020 Elsevier Ltd. All rights reserved.
Materials Today: Proceedings, Vol-43, pp. 3424-3427.
https://doi.org/10.1016/j.matpr.2020.09.075 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85105555777&doi=10.1016%2fj.matpr.2020.09.075&partnerID=40&md5=54789b4b44a5706265b282ad4ab5bbb2
Thomas R., Department of Physics and Electronics, Christ (Deemed to Be University), Bangalore, 560029, Karnataka, India; Manoj B., Department of Physics and Electronics, Christ (Deemed to Be University), Bangalore, 560029, Karnataka, India