Low-temperature propane gas sensor by zinc oxide thin film

Sensing of the flammable gases such as propane is a great interest for gas and petroleum industries. Recently nanomaterial based gas sensors were developed for detecting the flammable and toxic gases. Here, ZnO based propane gas sensor have been successfully fabricated by simple and low cost drop-coated method and using an extra layer of silver (02 nm) deposited by sputtering technique for detecting at a relatively low temperature. The resistivity variations of the ZnO thin films and ZnO-Ag films were measured at different operation temperatures by changing the propane gas concentration as a function of time. ZnO samples exhibited a high response (%07) at operating temperature of °021C, while ZnO-Ag samples showed a higher response (%°7) at operating temperature of °021C. Enhancement in the performance of the fabricated sensor is observed for ZnO films coated with silver nanoparticles

کلیدواژه ها:

Propane ، ZnO based gas sensor ، Drop-coated ، Sputtering