Publications in Scientific Journals:
P. Scheiber, A. Riss, M. Schmid, P. Varga, U. Diebold:
"Observation and Destruction of an Elusive Adsorbate with STM: O2/TiO2 (110)";
Physical Review Letters,
When a slightly defective rutile TiO2ð110Þ surface is exposed to O2 at elevated temperatures, the
molecule dissociates at defects, filling O vacancies (VO) and creating O adatoms (Oad) on Ti5c rows. The
adsorption of molecular O2 at low temperatures has remained controversial. Low-temperature scanning
tunneling microscopy of O2, dosed on TiO2ð110Þ at a sample temperature of # 100 K and imaged at 17 K,
shows a molecular precursor at VO as a faint change in contrast. The adsorbed O2 easily dissociates during
the STM measurements, and the formation of Oad īs at both sides of the original VO is observed.
Created from the Publication Database of the Vienna University of Technology.