AVS 51st International Symposium
    Surface Science Wednesday Sessions
       Session SS2-WeA

Paper SS2-WeA6
Site-Selective Abstraction in the Reaction of 5- to 20-eV O@super +@ with a Self-Assembled Monolayer

Wednesday, November 17, 2004, 3:40 pm, Room 210C

Session: Surface Collision Dynamics
Presenter: X. Qin, University of Notre Dame
Authors: X. Qin, University of Notre Dame
T.D. Tzvetkov, University of Notre Dame
D.C. Jacobs, University of Notre Dame
D. Lee, University of Chicago
L. Yu, University of Chicago
Correspondent: Click to Email
The reaction of hyperthermal (5-20 eV) O@super +@ with alkanethiolate self-assembled monlayers (SAM) is studied under UHV conditions. To learn about the site-specificity to hydrogen abstraction in this system, we deposit SAM layers for which the hydrogen atoms located on the C-12, C-11, or C-10 positions of 1-dodcanethiol are substituted with deuterium atoms. By comparing the yields of OH to OD emerging from these three isotopomers, we find that hyperthermal O@super +@ initially abstracts only H(D)-atoms bound to the top two carbon atoms within the SAM layer. Continued bombardment with O@super +@ ions significantly disorders the structure of the SAM.