Improved Field Emission Characteristics of Large-Area Films of Molybdenum Trioxide Microbelt

Figure 5

The typical SEM images (top view) of the MoO₃ microbelts with different separations between substrate and evaporation: (a), (d) 27 cm, (b) (e) 32 cm, (c), (f) 37 cm, the corresponding cross-section SEM images are in (g), (h) and (i), respectively.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)