A. Hitzke et al., THE INTERACTION OF AL AND O ATOMS ON W(110) STUDIED WITH METASTABLE IMPACT ELECTRON-SPECTROSCOPY (MIES) AND UPS, Surface science, 318(1-2), 1994, pp. 139-150
Al layers (< 2.5 adlayers thickness) are grown on W(110) under the ''i
n situ'' control of metastable impact electron spectroscopy (MIES) and
photoelectron spectroscopy (UPS). The adlayer thickness was determine
d by combining LEED and work function measurements. The interaction of
oxygen with the Al adlayers is studied. In order to analyze the adsor
bed-oxygen/oxide transition, thin layers of alumina are grown by coads
orbing Al and oxygen on a 750 K hot W(110) surface. The resulting MIE
and UP spectra are compared with those obtained during the oxygenation
of the Al layers. Finally, the MIE spectra for Al/W, Al/W + O-2 and a
lumina are simulated by taking into account information on the electro
nic structure available from previous studies.