Fig. 7From: Hierarchical Nanoflowers on Nanograss Structure for a Non-wettable Surface and a SERS SubstrateSEM images of Ag/CuO surfaces SEM images of a–d CuO nanograss and e–h CuO nanoflowers coated with Ag using various thicknesses of 20 nm (a, e), 30 nm (b, f), 40 nm (c, g), and 80 nm (d, h)Back to article page