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(a) Photographs of transparent thin-films of varying thickness on glass slides. (b) TEM image of graphene collected from dispersion before filtration. (c) SEM image of 100 nm graphene film on glass slide.
(a) Transmittance spectra of thin-films of varying thickness. (b) Plot of absorbance at 550 nm vs thin-film thickness. Bottom-right inset photo shows the flexibility of an approximately 100 nm thick graphene film on PET substrate.
CV curves for (a) 25 nm, (b) 50 nm, (c) 75 nm, and (d) 100 nm thin films at scan rate of 10, 20, 50, 100, and 200 mV/s. (e) Ragone plot of energy density vs power density for each thin film.
Charge-discharge curves for (a) 25 nm, (b) 50 nm, (c) 75 nm, and (d) 100 nm thin films at 0.75 A/g.
ac impedance plots for (a) 25 nm, (b) 50 nm, (c) 75 nm, and (d) 100 nm thin films.
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