Electronic and Dielectric Properties of Graphene and Graphene Oxide - Dada, Oluwaseun John
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This work establishes that the frequency and temperature-dependent electronic and dielectric properties of electrochemically reduced graphene (ERGO) are higher than graphene oxide (GO) papers by 2 orders of magnitude. There is stronger polarization as a result of increased concentration of reduced clusters and thinning of graphene sheets in ERGO papers, first ever electrochemically reduced paper from GO. In GO, there is a greater dependence on frequency due to a higher percentage of interlayer O-H bonds. Dielectric permittivity increases with decreasing frequency due to stronger polarization…mehr

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Produktbeschreibung
This work establishes that the frequency and temperature-dependent electronic and dielectric properties of electrochemically reduced graphene (ERGO) are higher than graphene oxide (GO) papers by 2 orders of magnitude. There is stronger polarization as a result of increased concentration of reduced clusters and thinning of graphene sheets in ERGO papers, first ever electrochemically reduced paper from GO. In GO, there is a greater dependence on frequency due to a higher percentage of interlayer O-H bonds. Dielectric permittivity increases with decreasing frequency due to stronger polarization and reduced conduction losses. At very high frequencies, greater conduction losses are responsible for lower values of dielectric permittivity of ERGO papers compared to GO papers. The profile of temperature dependent conductivity was due to thermally activated transport, residence time and ionic scattering of charge carriers. The recovery of conducting and dielectric properties at higher temperatures were due to the transition from graphene-ion-cloud to a graphene-air dielectric multi-nano-capacitor system.
Autorenporträt
El Dr. Dada ha sido un pastor y maestro de la palabra, y de los principios de la fe cristiana, con experiencias prácticas cristianas continuamente durante más de 25 años. Encargado de hacer realidad la presencia de Jesús con Poder. El Dr. Dada es el Director de la Fundación Vida Profunda, Hong Kong.