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Electronic Characteristics of Graphene Oxide and Reduced Graphene
Dada, Oluwaseun John (Author)
·
LAP Lambert Academic Publishing
· Paperback
Electronic Characteristics of Graphene Oxide and Reduced Graphene - Dada, Oluwaseun John
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Synopsis "Electronic Characteristics of Graphene Oxide and Reduced Graphene"
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 "U" or "W" profile (σ vs T curves) 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.
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The book is written in English.
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