Abstract
The interaction between molecules and a Si(111)7×7 surface has been investigated for various stages of coverage by using high-resolution electron-energy-loss spectroscopy (HREELS). In the case of 0.2- and 0.6-ML films, their HREELS spectra indicate the formation of chemical bonds between molecules and Si dangling bonds. After the completion of monolayer coverage, an double-domain structure is formed and its HREELS spectrum is quite similar to that of a monolayer film grown on a surface. This suggests that bond breaking between and Si triggers the transition of adsorption state from a low-coverage disordered structure to the ordered structure.
- Received 20 March 1997
DOI:https://doi.org/10.1103/PhysRevB.56.12124
©1997 American Physical Society