Table 5 Cross-sensitivity correlation matrix.

From: Enhanced Selectivity Electronic Nose Systems for Agricultural Ammonia Gas Detection via a co-designed WO3-ZnO Sensor Array and Convolutional Neural Networks

Analysis method

WO3 NH3/CH4

WO3 NH3/H2S

SnO2 NH3/CH4

ZnO NH3/H2S

Kendall’s τ

0.89/0.12

0.89/0.05

0.65/0.41

0.54/0.72

Response ratio

7.3:1

17.8:1

1.6:1

0.75:1

DFT energy diff

0.77 eV

0.53 eV

0.28 eV

− 0.18 eV

LDA separation

92.3%

94.1%

68.7%

59.2%

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