Figure 3
Liquid exfoliation of graphite oxide.
(a) Temperature change (ΔT) over time during the probe sonication of pure water and a GO suspension containing different initial amounts of graphite oxide. (b, c) FESEM images of GO nanosheets fabricated by probe sonication at (b) 2.5 cm and (c) 0.5 cm probe depths for 10 min. The inset FESEM image in (c) shows the maximum size of GO nanosheet, in which red arrow indicates the initiation of the breakage of GO nanosheet. (d) Shear viscosity of GO pastes prepared at different sonication conditions. (e) Raman spectra of the chemically reduced GO nanosheets fabricated by probe sonication with probe depths of 2.5 and 0.5 cm. (f) Schematic illustration of the GO nanosheet breakage from the defect site or from the sp3 hybridised region during probe sonication. (g) Real THz conductivity of GO, SRGO and LRGO film.
