Figure 5
From: A Low-Cost Non-explosive Synthesis of Graphene Oxide for Scalable Applications
(a) The UV exposure dependent current-voltage (I-V) characteristics of a GO film drop-casted on a glass substrate. These I-V characteristics were obtained after different durations of exposure (ranging from 0–2 hour) to a 4 Watt, UV lamp emitting at 365 nm. Inset: I-V characteristics of CVD grown graphene, (b) Current (I) as a function of UV exposure time keeping the voltage (V) across the GO film fixed at 1.0 Volt and 2.0 Volt, respectively. (c) C 1 s XPS obtained for the GO and the rGO (reduced via exposure to a 4 Watt, 365 nm UV lamp for 2 hours) samples and that of CVD grown graphene. The peaks corresponding to the various functional groups are marked. (d) The comparison of Raman spectra for the GO film and the rGO film obtained after a 2 hour exposure to a 4 Watt, 365 nm UV lamp and Raman spectra of 1 L, 2 L and multilayer CVD grown graphene. The D, G and 2D peaks are appropriately labeled.
