Figure 1.

Set of ESEM top view images of NAA samples (scale bar = 1 μm). (a) R-OSC(1) (L_p = 5 μm, and d_p = 30 nm). (b) R-OSC(2) (L_p = 5 μm, and d_p = 41 nm). (c) R-OSC(3) (L_p = 5 μm, and d_p = 52 nm). (d) R-OSC(4) (L_p = 5 μm, and d_p = 71 nm).