Fig. 2: Structural changes upon OLAC adsorption.

Structural model obtained from SXRD fit of magnetite (001) (a) and (111) (c) with atomic displacements with respect to the bulk positions. Figures (b) and (d) show the occupancy profiles obtained from the SXRD fits which correspond to the respective atomic layer of the unit cell in (a) and (c) for magnetite (001) and (111), respectively. Magnetite oxygen is shown in red, carboxylate oxygen in green, carbon in black, octahedral iron in blue, tetrahedral iron in light blue, octahedral vacancy sites in yellow and tetrahedral interstitial ions in orange.