omega-substituted long chain alkylphosphonic acids - Their synthesis and deposition on metal oxides and subsequent functional group conversion of the deposited compounds

摘要

The crystal structure and the surface of alumina layers on silicon wafers were investigated by means of GIWAXS, WAXS, and AFM. Self-assembled monolayers of omega-substituted long-chain alkylphosphonic acids were deposited on alumina and the layer thickness and homogeneity were determined by ellipsometry revealing a dependency of thickness and homogeneity on the nature of the substituent. During the adsorption process surface etching by the phosphonic acid was observed causing an increase in surface roughness.Furthermore, ex post functional group conversions were carried out yielding surface bound azides and rhodanides.