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. 2020 Apr 15;10(25):14877–14884. doi: 10.1039/d0ra00488j

Fig. 5. (a) The resistance changes of the sensors based on nanospiral ZnO thin film when exposed to NO gas with 70, 80, 90 ppb at 150 °C under 40%. (b) The responses changes of the sensors based on nanospiral and dense ZnO thin film when exposed to NO with different concentration at 150 °C under 40%.

Fig. 5