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Photograph of (a) GO, (b) standard experiment, 0.36 wt % GO + PCL, and (c) 0.36 wt % fGO/PCL that dispersed in eight organic solvents (from left to right: acetone, chloroform, DMF, DMSO, ethanol, hexane, THF, and toluene) through bath ultrasonication for 2 h. Top: Dispersions immediately after sonication. Middle: Dispersions one day after sonication. Bottom: Dispersions three days after sonication.
