Sequence-controlled molecular layers on surfaces by thiol–ene chemistry: synthesis and multitechnique characterization

Silicon surfaces were functionalized by thiol-ene chemistry using sequential reactions of different alpha,omega-dienes and alpha,omega-dithiols bearing marker moieties. A system of six individual layers was achieved and exhaustively characterized by combining independent techniques such as X-ray Photoelectron Spectroscopy, Time-of-Flight Secondary Ion Mass Spectrometry and Atomic Force Microscopy using a molecular ruler system.