Synthesis of Cobalt Oxides Thin Films Fractal Structures by Laser Chemical Vapor Deposition

Figure 3

Sequence of low and high magnification of FESEM images of structures on the film surface with the same C₂H₂ : H₂ flow rate of 100 : 200 sccm for different illumination of (a, b) 5 min and (c, d) 15 min.

(a)

(b)

(c)

(d)