Abstract
Ultrathin films on Mo(112) were synthesized using different preparation procedures and characterized with ultraviolet photoelectron spectroscopy (UPS), metastable impact electron spectroscopy (MIES), and polarization modulation infrared reflection absorption spectroscopy (PM-IRAS). By correlating the vibrational and electronic data, an assignment of the prominent spectral features are made. The physical properties of films near one monolayer are influenced by the Mo substrate due to the linkages, whereas films greater than two monolayers show properties comparable to bulklike silica samples. The electronic and vibrational properties of the thin films are strongly coverage dependent. The data show that highly ordered films can be grown up to one monolayer, whereas films with a thickness of greater than one monolayer are amorphous.
- Received 2 November 2004
DOI:https://doi.org/10.1103/PhysRevB.72.115409
©2005 American Physical Society