Improved Methane Sensing Properties of Co-Doped SnO₂ Electrospun Nanofibers

Figure 4

SEM images of (a) nanofibers, (b) nanospheres and TEM images of (c) nanofibers, (d) nanospheres. The inserts show the TEM images of individual fiber and sphere.

(a)

(b)

(c)

(d)