Skip to Main Content

MME Graduate Seminar: Oxygen-deficient ZnO thin films grown by reactive magnetron sputtering: influence of the oxygen-to-argon ratio on the magnetic and gas sensing capabilities

This is a past event.

Friday, November 12, 2021 at 3:00pm to 4:30pm

College of Engineering and Computing, EC1107 10555 West Flagler Street Miami FL, 33174

Scientists and engineers have studied zinc oxide (ZnO) nanomaterials for a great variety of applications. Specifically, ZnO nanomaterials with oxygen vacancies have attracted attention due to improved performance in some of these applications compared to pristine ZnO. For instance, ZnO with oxygen vacancies exhibits ferromagnetic behavior at room temperature, suitable for spintronics applications. Also, for visible light photocatalysis, ZnO with oxygen vacancies shows better absorption of visible light than pristine ZnO. Furthermore, an improvement in the ZnO gas sensing capabilities results from oxygen-deficient oxides. These properties are mainly due to the changes in the carrier's density and band structure of ZnO due to oxygen vacancies. Furthermore, in the sputtering deposition technique, it is known that the plasma processing parameters influence the ZnO properties. Therefore, in this seminar, we discuss the effects of the oxygen to argon sputtering gas ratio on the oxygen vacancies in ZnO thin films and hence, the gas sensing properties for environmental monitoring applications.

Recent Activity

Statement of Free Expression

FIU endorses the Florida Board of Governors' Statement of Free Expression to support and encourage full and open discourse and the robust exchange of ideas and perspectives on our campuses. In addition to supporting this legal right, we view this as an integral part of our ability to deliver a high-quality academic experience for our students, engage in meaningful and productive research, and provide valuable public service. This includes fostering civil and open dialogue in support of critical thinking in and out of the classroom, including events hosted by the university.