Figure 9.
SEM images of the surfaces of the gas sensors: (a) S(c); (b) S(m); (c) S(c/m1); (d) S(c/m2); and (e) S(c/m3).
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.