The initial interaction of water with semiconductors determines the electronic structure of the solid-liquid interface. The exact nature of this interaction is, however, often unknown. Here, we study gallium phosphide-based surfaces exposed to H2O by means of in situ reflection anisotropy spectroscopy. We show that the introduction of typical imperfections in the form of surface steps or trace contaminants not only changes the dynamics of the interaction, but also its qualitative nature. This emphasises the challenges for the comparability of experiments with (idealised) electronic structure models for electrochemistry.
@article{arxiv.1903.08612,
title = {The impact of non-ideal surfaces on the solid-water interaction: a time-resolved adsorption study},
author = {Matthias M. May and Helena Stange and Jonas Weinrich and Thomas Hannappel and Oliver Supplie},
journal= {arXiv preprint arXiv:1903.08612},
year = {2019}
}