Chemical Physics & Analysis
Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352
Dr. Greg Kimmel investigates thermal and non-thermal reactions at surfaces and interfaces. These reactions are important in a wide range of applications including catalysis, photocatalysis, radiation chemistry and waste processing. Since high-energy radiation typically produces numerous low-energy secondary electrons that are chemically active, the low-energy electrons (<100 eV) frequently play a dominant role in radiation chemistry. In addition, the presence of surfaces or interfaces modifies the reactions and processes compared to what occurs in the bulk. In photocatalysis, visible and/or UV photons are used to initiate a variety of reactions. However, a detailed understanding of the underlying physical and chemical processes is often lacking. Dr. Kimmel and his colleagues use surface science techniques to investigate thermal and non-thermal reactions at surfaces and interfaces. This work addresses several important issues, including the need to understand the relative importance of the primary excitation source compared to the secondary electrons it produces, energy transfer at surfaces and interfaces, and new reaction pathways at surfaces. Dr. Kimmel also investigates the structure of water films at interfaces. Understanding the structure of the water films provides a foundation for the development of a detailed understanding of the reactions at aqueous interfaces.
- energetic processes at surfaces and interfaces in fields such as radiation chemistry, waste processing, and advanced materials synthesis.
- the structure of water at interfaces
- chemistry on oxide surfaces
Education and Credentials
- Ph.D. Applied Physics, Cornell University, Thesis topic: Charge exchange processes for atoms and molecules scattering from metal surfaces.
- B.S. Engineering Physics (with distinction), Cornell University
Affiliations and Professional Service
- American Physical Society
- American Chemical Society