Fig. 5

The SEM micrographs of (a) NiCo(O).4h, (b, c) Magnified micrographs of NiCo(O).4h, (d) NiCo(O).6h, (e, f) Magnified micrographs of NiCo(O).6h, (g) NiCo(O).8h, (h, i) Magnified micrographs of NiCo(O).8h, (j) NiCo(O).10h, (k, l) Magnified micrographs of NiCo(O).10h, (m) NiCo(O).12h and (n, o) Magnified micrographs NiCo(O).12h.