XPS and LEED Analyses on Zirconium Oxide Modified (100) Surface of Molybdenum

It has been found that the work function of Mo(100) surface is able to reduce to 2.1 eV by heating it with a slight layer of zirconium oxide in a vacuum condition. Here the low work function surface, which is abbreviated to ZrO/Mo(100), was examined aiming to understand the reducing mechanism of the work function. Low-energy electron diffraction (LEED) is employed to analyze atomic arrangement at the surface, and X-ray photoelectron spectroscopy (XPS) to identify the surface chemical condition. The experiment gives almost the same results as for the ZrO/W(100) low work function surface