Our experimental investigations are aimed at developing a detailed understanding of the interfacial chemical reactions that play a vital role in numerous biological and environmental processes such as catalysis, chemical sensing, cell transport, and respiration. The experiments are facilitated by using functionalized self-assembled monolayers (SAMs) and Langmuir-Blodgett (LB) films to model a variety of important interfacial systems, and by employing molecular beam techniques to precisely control the gas temperature, directionality, and flux onto the surface. The studies are performed in an ultrahigh vacuum environment which allows the isolation of molecule-surface reactions from bulk phase processes, and enables the implementation of a number of surface sensitive analysis techniques to monitor the destruction and formation of interfacial chemical bonds. The experiments help to reveal gas-surface adsorption and reaction probabilities, determine bonding structures and energies, and identify reaction products for model gas-surface interactions. Some of our current research projects include:

• Chemical sensor development through studies of the ways in which hydrogen bonding gases, such as a number of volatile organic compounds, adsorb to specially designed functionalized surfaces.
• Exploration of fundamental reaction mechanisms to provide insight into the ways in which corrosive chemicals bond to, diffuse into, and react at an interface.
• Development of new strategies for chemical warfare agent sensing and destruction.
• Investigation of Chemistry at the Gas-Pulmonary Surfactant Interface to provide a more complete understanding of the toxic health effects associated with a number pollutant gases.

1. M. Maazouz, J. R. Morris, D C. Jacobs, "Ion Imaging in Surface Scattering," in Imaging in Chemical Dynamics, edited by Suits and Contenetti, Oxford University Press (2001).
2. P. Behr, J. R. Morris, M. D. Antman, B. R. Ringeisen, J. Splan, G. M. Nathanson, "Reaction and Desorption of HCl and HBr Following Collisions with Supercooled Sulfuric Acid," Geophysical Review Letters, 28, 1961 (2001).
3. J. R. Morris, P. Behr, M. D. Antman, B. R. Ringeisen, J. Splan, G. M. Nathanson, "Molecular beam scattering from supercooled sulfuric acid: Collisions of HCl, HBr, and HNO3 with 70 wt % D2SO4" Journal of Physical Chemistry A 104 , 6738-6751 (2000).
4. J. R. Morris, G. Kim, T. Barstis, R. Mitra, D. C. Jacobs"Dynamics of Dissociative Scattering: Hyperthermal Energy Collisions of State-Selected OCS+ on Ag(111)," Journal of Chemical Physics 107, 6448-6459 (1997).