Chemical reactivity of the Si(111) (View the MathML source) R30°-B surface: An electron-energy-loss spectroscopy study

The interaction of the Si(111)(View the MathML source)R30°-B surface with NH3 has been studied mainly by using high-resolution electron-energy-loss spectroscopy. The (View the MathML source)R30°-B surface was formed by heating the Si(111) surface preexposed to B10H14. When exposed to NH3 at 90 K, vibrational losses observed for NH3 adsorbed on the surface include 163 and 370 meV losses, which are ascribed to chemisorbed NH3 coordinated to the Si adatom on the (View the MathML source)R30°-B surface. This indicates that the chemical reactivity of the (View the MathML source)R30°-B surface is quite different from those of clean silicon surfaces.