We have studied, by means of surface X-ray diffraction (SXRD), the surface atomic structure of copper complexes with Alanine (Cu-Ala₂). Although, the bulk structure is well known since many years, in the bulk, the intermolecular interactions inside the crystal are stronger that in possible biological conditions. However, at the crystal surface, molecules are less constrained. Closer biological conditions can be achieved if the atomic surface structure is determined in aqueous solution.Crystals were studied in a cell filled with saturated solution, controlling the temperature with a thermostatic bath. The growth of the crystal was followed in real time by measuring a rocking scan of the reflection (1 1 0.5), which gives more sensitivity to the surface modifications. The experiments were carried out on the SpLine beamline (BM25) at the ESRF in Grenoble (France) using a six-circle diffractometer in vertical geometry.

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1. Structural, electronic and chemical properties by simultaneous combination of X-Ray diffraction (XRD) and Hard X-Ray Photoelectron Spectroscopy (HAXPES, up to 15KeV)