Binding mechanisms of methacrylic acid and methyl methacrylate on Si(111)-7×7 - Effect of substitution groups

Abstract

The interaction of methacrylic acid and methyl methacrylate with Si(111)-7×7 has been investigated using high-resolution electron energy loss spectroscopy (HREELS) and X-ray photoelectron spectroscopy (XPS). While methacrylic acid chemisorbs dissociatively through O-H bond cleavage, methyl methacrylate is covalently attached to the silicon surface via a [4+2] cycloaddition. The different reaction pathways of these two compounds on Si(111)-7×7 demonstrate that the substitution groups play an important role in determining the reaction channels for multifunctional molecules, leading to the desired flexibility in the organic modification of silicon surfaces. © 2005 American Chemical Society.