Abstract
TiN, as a typical representative of transition metal nitrides (TMNs), has many excellent properties (higher electrical conductivity and chemical inertness). These features are of great importance for developing novel resistive chemical gas sensing. Here, we presented a facile ambient pressure chemical vapor deposition (APCVD) for the synthesis of TiN nanoparticles (NPs). Our result shows that TiN NPs exhibit excellent gas sensing behaviors towards ethanol gas. The high response and good stability towards ethanol gas was realized for the first time. Moreover, in order to elucidate the sensing mechanism, the carrier concentration and mobility in air and ethanol gas was studied for TiN NPs, offering a direct evidence for explaining the sensing behavior. Interestingly, the carrier concentrations play an important role in fast response ethanol gas. This study reveals that TiN could be a promising candidate for ethanol sensing, opening up new directions for applications in industrial control, environmental safety and other fields.
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