Morphological and Radio Frequency Characterization of Graphene Composite Films
AbstractGraphene is a monolayer of carbon atoms which exhibits remarkable electronic and mechanical properties. Graphene based nano-materials have gained a lot of interest for many applications. In this paper, inks with three different graphene concentrations (12.5, 25, and 33 wt % in graphene) were prepared and deposited by screen printing. A detailed investigation of films’ surface morphology using Scanning Electron Microscope (SEM) and Atomic Force Microscopy (AFM) revealed that the graphene films present a homogeneous dispersion of the filler with a comparatively lower surface roughness at higher concentrations and negligible agglomerates. The films were then printed between copper electrodes on FR-4 substrate (trade name for glass-reinforced epoxy laminate material), commonly used in Radio Frequency (RF) circuits, and the measured scattering parameters analyzed. Finally, the reflection coefficient of a patch antenna, fabricated on FR-4 substrate with and without a stub loaded by a thin film were measured. The difference of the resonant frequency due to the different interaction between graphene flakes and polymer binders shows attractive features of functionalized graphene films for chemical and bio-sensing applications. View Full-Text
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Quaranta, S.; Miscuglio, M.; Bayat, A.; Savi, P. Morphological and Radio Frequency Characterization of Graphene Composite Films. C 2018, 4, 32.
Quaranta S, Miscuglio M, Bayat A, Savi P. Morphological and Radio Frequency Characterization of Graphene Composite Films. C. 2018; 4(2):32.Chicago/Turabian Style
Quaranta, Simone; Miscuglio, Mario; Bayat, Ahmad; Savi, Patrizia. 2018. "Morphological and Radio Frequency Characterization of Graphene Composite Films." C 4, no. 2: 32.
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