Chemistry is all around us
It impacts everything we can see, touch, smell and taste. The programs of the Department will prepare you to understand,investigate and apply the principles of chemistry to a wide variety of careers from the study of the environment, to solving criminal cases, to working in a chemically related business, to using chemistry to understand biological systems and processes, to preparing for a career as a research chemist.
Our faculty provide teaching and research expertise in all major areas of Chemistry
The Department offers weekly seminars by faculty from departments throughout the United States and beyond describing the latest advances in their fields.
Departmental Seminars are held in the Van Lente Auditorium (Neckers 240) at 4:00 pm unless otherwise indicated
Materials Technology Center Seminar Series
Abstract: The technologically useful properties of an oxide semiconductor often depend upon the defect types and concentrations. Defects such as vacancies and interstitials affect the performance of photoactive devices, the effectiveness of catalysts and photocatalysts, the sensitivity of solid-state electrolyte sensors, and the efficiency of solar energy conversion. We discovered several new methods for defect manipulation involving surfaces. Solid-state diffusion measurements in TiO2 and ZnO, together with detailed mathematical modeling, have identified new interactions between surface and bulk point defects having comparable chemical richness to gas-surface reactions, and governed by electrostatic and surface bond insertion/generation mechanisms. We demonstrate several instances in which defect engineering has improved photocatalysts as well as catalysis by metals. In particular, defect-engineered control of both carrier concentration and surface potential in polycrystalline anatase TiO2 yield improvements in photocatalysis rates that accord closely with a simple mathematical model for photocurrent.