Table 1 Adsorption distances (d, Å), formation energies (Eform, eV), and the corresponding sorption energies (∆Eads, kcal/mol) of the NO2 molecule on the original and modified sensors at the HSE06/TZVP level of theory.

From: Alkali metal doping of black phosphorus monolayer for ultrasensitive capture and detection of nitrogen dioxide

Sensor

d

Eform

Eads

BP

2.79

− 0.45

Li-BP

1.82

− 1.63

− 9.68

Na-BP

0.31

− 1.17

− 24.36

K-BP

0.50

− 1.27

− 20.59