“…J o u r n a l P r e -p r o o f The oxide and oxynitride sensors showed to be able to identify acetaldehyde in ethanol, however, ZnGaON showed a response and recovery time. The faster response observed for ZnGaON has been associated to the greater number of active sites on the surface, since formation of oxynitride typically increases the specific surface area [45][46][47][48]. It was also observed that the presence of acetaldehyde in ethanol accelerates the desorption of species from the sensor surface as if alcohol promoted a faster cleaning.…”