This work presents a design, fabrication, modeling and frequency response of 3D porous graphene circuit elements for a non-ideal resistor–capacitor (RC) circuit application based on a CO2 infrared laser direct writing method. The material properties of laser-induced graphene (LIG) were carefully analyzed by Raman, SEM and XRD. The room-temperature experiment of the non-ideal RC circuit from 3D porous LIG was conducted by three different electrical frequencies. The results showed that the parallel non-ideal capacitors had ~ 10% electrical response differences than with a single or a series porous graphene capacitor element. Furthermore, we demonstrated that the experiment result and the numerical simulation result of the porous graphene circuit elements were in good agreement. Moreover, the 3D porous graphene-based non-ideal RC circuit was demonstrated a 300 kHz cutoff frequency by an impedance analyzer. Compared with other methods for graphene of circuit elements system, this LIG method not only has the advantage of a one-step processing of 3D porous graphene circuit elements in air, but also provided a rapid realization of graphene-based circuit elements system on polymer.
Journal of Materials Science – Springer Journals
Published: Jun 4, 2018
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