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(a)-(d) SEM micrographs at different magnifications displaying edges of rGO on PS film.
(a) EDS spectrum of rGO coated PS film (b) Raman spectra of rGO on PS film on the top surface (black) and near the cross section (red).
(a) Field emission I-E curves in parallel (black) and perpendicular (red) configurations of rGO-PS film; field emission J-E curves of rGO-PS film (b) parallel configuration, and (c) perpendicular configurations. Insets: corresponding FN plots, the red lines show the linear fits to Eq. (1) ; (d) repeatability of field emission J-E curves of rGO-PS film in perpendicular configuration. Inset: emission current vs. time showing the stability for 25 min.
A comparison of the parameters describing the field emission characteristics in the present study with earlier works on field emission studies of graphene and CNTs.
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