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(a) Low-magnification TEM image of single graphene growth vertically on the surface of silicon nanocone. (b), (c), HRTEM images of the areas marked b, c in panel (a). (d) Low-magnification TEM image of a perfect flowerlike GNSs. (e) HRTEM images of the areas marked e in panel (d). (f) Statistics of the thickness distribution of GNSs. (g) Raman spectroscopy of GNSs. (h) Typical EELS spectrum of the GNSs.
