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ChemistryPhysical Chemistry

Atomistic Simulations of Hyperthermal Collisions Between Closed-Shell Species and Organic and Inorganic Surfaces

Authors: Diego Troya; VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF CHEMISTRY
Abstract:
This final report describes the efforts to develop computational- chemistry technology aimed at enabling simulation of gas/surface collisions of interest to the US Air Force that have been carried out under contract FA9550-06-1-0165. The report includes advances in three separate, but complementary lines of research that had the overarching goal of performing atomistic simulations of high-energy collisions between gases and surfaces with unprecedented levels of accuracy. These three lines are: (1) Development of specific-reaction- parameters semiempirical Hamiltonians for the study of the dynamics of radical+alkane reactions, (2) Classical-trajectory simulations of hyperthermal collisions between closed-shell Ar atoms and perfluorinated organics, and (3) Investigation of energy exchange in collisions of closedshell gases with alkanethiolate self-assembled monolayers. The principal outcome of this project was the advancement of computational- chemistry techniques that can be used to simulate chemical reactions occurring on and around spacecraft in orbit with accuracy.

Limitations: APPROVED FOR PUBLIC RELEASE
Description: Final rept. Mar 2006-Nov 2008
Pages: 14
Report Date: Feb-2009
Contract Number: FA9550-06-1-0165 FA95500610165
Report Number: A652694
Keywords relating to this report:
*COMPUTATIONAL CHEMISTRY
CHEMICAL REACTIONS
COLLISIONS
ENERGY TRANSFER
GASES
HIGH ENERGY
HIGH TEMPERATURE
INORGANIC MATERIALS
ORGANIC MATERIALS
SIMULATION
SPACECRAFT
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