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

Figure 2

Low and high magnification of FESEM images of structures on the film surface with the same C₂H₂ : H₂ gas flow rate of 50 : 200 sccm for different laser-irradiated times of (a, b) 3 min and (c, d) 5 min.

(a)

(b)

(c)

(d)