Orientational Phase Transition in the System Pyridine/Ag(111): A Near-Edge X-Ray-Absorption Fine-Structure Study
- 5 May 1986
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 56 (18), 1921-1924
- https://doi.org/10.1103/physrevlett.56.1921
Abstract
A phase transition has been observed in the system pyridine adsorbed on Ag(111) at 100 K by near-edge x-ray-absorption fine-structure measurements in real time. At low pyridine coverages an angle between the ring plane and the surface plane of 45° ±5° was observed. This phase converts sharply at a submonolayer coverage to a phase with an angle between the ring plane and the surface plane of 70° ±5°. Continued exposure gradually leads to a randomly oriented multilayer.Keywords
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