Publications in Scientific Journals:
M. Dürr, A. Biedermann, Z. Hu, U. Höfer, T.F. Heinz:
"Probing high-barrier pathways of surface reactions by scanning tunneling microscopy";
The ability of scanning tunneling microscopy to probe the pathways of thermally activated high-barrier surface processes is frequently limited
by competing low-barrier processes that can confuse measurement of the true initial and final configuration. We introduce an approach to
circumvent this difficulty by driving the surface process with nanosecond laser heating. The method is applied to determine the pathway of
recombinative desorption in the H/Si(001) system. The observed configuration of dangling bonds after laser heating reveals that the desorbed
hydrogen molecules are not formed on single dimers, but rather from neighboring silicon dimers via an interdimer reaction pathway.
Electronic version of the publication:
Created from the Publication Database of the Vienna University of Technology.