Synthesis of Nanosized Zinc-Doped Cobalt Oxyhydroxide Parties by a Dropping Method and Their Carbon Monoxide Gas Sensing Properties

Figure 6

Surface morphologies of nano-CoOOH with Zn doping concentrations of (a) 1%, (b) 2%, (c) 3%, (d) 4%, and (e) 0%.

(a)

(b)

(c)

(d)

(e)