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
Dr Mario Alpuche-Aviles, Department of Chemistry, University of Nevada Reno, Monday, January 26, 2015, Neckers 440
" Electrochemistry of Semiconductor Nanostructures "
Our group works on electrochemical measurements of semiconductor structures such as nanoparticles and nanowires. One of our goals is to develop electrochemical methods to study semiconductors in colloidal suspension. The first part of this talk introduces an electrochemical technique to study photocatalytic processes of colloidal semiconducting nanoparticles. We have demonstrated the detection of individual anatase nanoparticles interacting with an electrode by photoelectrochemical currents(Figure 1). These interactions carry information about the photochemical process at the single nanoparticle level and this seminar will present our advances towards measuring the particle by particle kinetics of electron transfer reactions for the photooxidation of methanol, proposed as a model system.
The second part of the seminar covers our studies of size-dependent electrochemical properties of ZnO nanoparticles. Colloidal nanoparticles where electrolyzed under potential control and the reduction rate was found to be dependent on potential. A characteristic E1/2 potential was found to depend on nanoparticle diameter with a dependence stronger than anticipated from the reported values of ZnO surface tension. Finally, we present our results of ZnO nanowires and a significant rate of surface recombination that competes with several electrochemical reactions.
Figure 1. Schematic representation of the detection of individual nanoparticles by photoelectrochemical currents
Dr Tianbiao Liu, Pacific Nortwest National Laboratory, Thursday, January 29, 2015
" Complementary Approaches to Harnessing Renewable Energy: Electrocatalysis and Rechargeable Batteries "