Fig. 9: Fundamental sensing mechanisms of H2 sensor based on MOSs.

Schematic representation of H2 sensing mechanisms: a Reducing gas effect mechanism of n- and p-type MOSs; b Metallization effect mechanism of ZnO nanograins

Schematic representation of H2 sensing mechanisms: a Reducing gas effect mechanism of n- and p-type MOSs; b Metallization effect mechanism of ZnO nanograins