Abstract
The interface between acrylic acid (CH 2 = CHCOOH) and polycristalline aluminium at 300 K has been studied by different spectroscopies to determine the adsorption mechanism. X-ray photoemission spectroscopy (XPS) probed the occupied states (core levels) of the system, near edge X-ray absorption fine structure (NEXAFS) with synchrotron beam specified the unoccupied ones and reflection absorption infrared spectroscopy (RAIRS) measured the vibration modes of this interface. All the data clearly show that acrylic acid is dissociated upon adsorption on aluminium at 300 K, leading to the formation of saturated aliphatic chains directly linked to the metallic surface (CAl bond) and of aluminium oxide islands onto which adsorption of aliphatic carboxylate occurs.
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