The FESEM and TEM images of Fe

The FESEM and TEM images of Fe3O4, Fe3O4/1% RGO NSCs, Fe3O4/3% RGO NSCs and Fe3O4/5% RGO NSCs Embelin given in Fig. 1. The FESEM images of Fig. 1(a-b) show a micro scale rose-like morphology of the synthesized Fe3O4 (Fe3O4 MRose) in the absent of RGO. Figure (1b) show more dilates of Fe3O4 MRose with a larger magnification which clearly shows a highly available surface area of Fe3O4 MRose. The FESEM images of Fe3O4/1% RGO NSCs, Fe3O4/3% RGO NSCs and Fe3O4/5% RGO NSCs are shown in Fig. 1 (c), (e) and (g), respectively. The results show; first, the existence of RGO (the arrows point to the presence of the RGO), second a trapping phenomenon occurred on the RGO during the synthesis of Fe3O4/ RGO with the different percentages of RGO, third the effect of RGO percentage on the morphology and size of the Fe3O4. Fig. 1 (d), (f) and (h) also show the TEM results of Fe3O4/1% RGO NSCs, Fe3O4/3% RGO NSCs and Fe3O4/5% RGO NSCs respectively. The TEM results clearly confirm the trapping phenomenon Quaternary Period has occurred on the RGO and the change of Fe3O4 rose-like to spherical morphology with the increase the RGO percentage.