On the Low-Temperature Response of Semiconductor Gas Sensors
Figure 25
Position of the valence and conduction bands of H-terminated diamond (left) and O-terminated diamond (right) relative to the H3O+/H2O and H2O/ redox levels in water (middle). The energetic match of the H3O+/H2O redox level in water with the top of the valence band in H-terminated diamond facilitates the transfer of diamond valence electrons into the surface electrolyte and thus the formation of a p-type surface layer in undoped diamond.
