Table 1.

The performance comparison of ZnO ammonia sensors.

	Material	Structure	NH3 Concentration	Response		Sensing Temperature
[15]	ZnO	traditional deposited film	600 ppm	160 s-57.5%	\	150 °C
[41]	ZnO	nanoparticles	800 ppm	48 s-99.61%	\	300 °C
[42]	ZnO	nanoplates	300 ppm	43 s-72.22%	\	300 °C
[43]	ZnO	nanoparticles	40 ppm	261 s-95.32%	\	350 °C
[44]	ZnO	nanofibers	20 ppm	~25%	\	550 °C
This work	Ag/ZnO	nanostructured film	300 ppm 10 ppm	60 s-61.18% 60 s-25.14%	6 s-10% 26 s-10%	300 °C