Publication at Faculty of Mathematics and Physics |
2013
Abstract
In this STM study we investigate the interaction of ethylene with clean, indium and tin modified Si(001) surface. We find that ethylene chemically interacts with tin-modified Si(001)2×1 surface by [2+2] cycloaddition reaction — as in the case of adsorption on clean Si(001) — but the reactivity of the substrate is dramatically reduced.
On the other hand, indium-modified Si(001)2×1 surface was found to be chemically inert to ethylene adsorption. We attribute the reactivity/inertness of the tin and indium modified surfaces to the difference in π-state occupancy of their dimer structural unit.