Figure 6.
Selectivity tests of gas sensors based on NiO films. The concentration of NH3 is 50 ppm, and the concentration of other organic gases is higher than 300 ppm.
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.