Characterization of molecular assemblies on silicon surfaces by attenuated total reflectance infrared spectroscopy

Alkyl monolayers anchored to Si(111) were prepared in diluted and neat 1-alkene by thermal reaction. Monolayers prepared were investigated by attenuated total reflectance infrared spectroscopy. It was found that alkyl chains in the monolayers anchored to Si(111) had an all-trans conformation. Monolayers prepared in diluted 1-alkene were identical with that prepared in neat 1-alkene. The rate of reaction between 1-alkene and hydrogen-terminated silicon remarkably depended on the concentration of 1-alkene.