Resolving the adsorption of molecular O₂ on the rutile TiO₂(110) surface by noncontact atomic force microscopy.

ABSTRACT: Interaction of molecular oxygen with semiconducting oxide surfaces plays a key role in many technologies. The topic is difficult to approach both by experiment and in theory, mainly due to multiple stable charge states, adsorption configurations, and reaction channels of adsorbed oxygen species. Here we use a combination of noncontact atomic force microscopy (AFM) and density functional theory (DFT) to resolve [Formula: see text] adsorption on the rutile [Formula: see text](110) surface, which presents a longstanding challenge in the surface chemistry of metal oxides. We show that chemically inert AFM tips terminated by an oxygen adatom provide excellent resolution of both the adsorbed species and the oxygen sublattice of the substrate. Adsorbed [Formula: see text] molecules can accept eit

SUBMITTER: Sokolovic I 

PROVIDER: S-EPMC7334520 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature