Precision Studies of Gas-Surface Collisional Energy Transfer at Complex Interfaces

摘要

In this Final Technical Report we describe the accomplishments that have occurred in this AFOSR funded project. It has been a very productive period: we have studied the dynamical properties of polymeric interfaces in nanoconfinement; demonstrated the efficacy of using hyperthermal neutral atomic beams for sputtering; developed refined models of hyperthermal gas-surface energy/momentum exchange; developed a new method for probing molecular diffusion through polymeric thin films; and explored the oxidative chemistry of gold and the chemistry/photochemistry of NO/NiO interfaces. As part of this program we implemented a new in situ FTIR spectrometer system that is coupled with a molecular beam instrument for real-time studies of interfacial sticking and chemistry, as well as a high-intensity/laser-ignition pulsed molecular beam for producing hyperthermal beams of neutrals. This hyperthermal source has been used for studies of collisional energy transfer and in exploratory experiments on sputtering due to neutral atom bombardment. This was accomplished during a period of great disruption: our laboratories were relocated from their former location, the Research Institutes Bldg, to the new Gordon Center at the U. of Chicago. All instruments are now fully operational.