X-ray Spectroscopy of a Rare-Earth Molecular System Measured at the Single Atom Limit at Room Temperature.

Autor: Wieghold S; Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States., Shirato N; Nanoscience & Technology Division, Argonne National Laboratory, Lemont, Illinois 60439, United States., Cheng X; Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, United States., Latt KZ; Nanoscience & Technology Division, Argonne National Laboratory, Lemont, Illinois 60439, United States., Trainer D; Nanoscience & Technology Division, Argonne National Laboratory, Lemont, Illinois 60439, United States., Sottie R; Nanoscale & Quantum Phenomena Institute, and Department of Physics & Astronomy, Ohio University, Athens, Ohio 45701, United States., Rosenmann D; Nanoscience & Technology Division, Argonne National Laboratory, Lemont, Illinois 60439, United States., Masson E; Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, United States., Rose V; Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States., Wai Hla S; Nanoscience & Technology Division, Argonne National Laboratory, Lemont, Illinois 60439, United States.; Nanoscale & Quantum Phenomena Institute, and Department of Physics & Astronomy, Ohio University, Athens, Ohio 45701, United States.
Jazyk: angličtina
Zdroj: The journal of physical chemistry. C, Nanomaterials and interfaces [J Phys Chem C Nanomater Interfaces] 2023 Oct 02; Vol. 127 (40), pp. 20064-20071. Date of Electronic Publication: 2023 Oct 02 (Print Publication: 2023).
DOI: 10.1021/acs.jpcc.3c04806
Abstrakt: We investigate the limit of X-ray detection at room temperature on rare-earth molecular films using lanthanum and a pyridine-based dicarboxamide organic linker as a model system. Synchrotron X-ray scanning tunneling microscopy is used to probe the molecules with different coverages on a HOPG substrate. X-ray-induced photocurrent intensities are measured as a function of molecular coverage on the sample, allowing a correlation of the amount of La ions with the photocurrent signal strength. X-ray absorption spectroscopy shows cogent M 4,5 absorption edges of the lanthanum ion originated by the transitions from the 3d 3/2 and 3d 5/2 to 4f orbitals. X-ray absorption spectra measured in the tunneling regime further reveal an X-ray excited tunneling current produced at the M 4,5 absorption edge of the La ion down to the ultimate atomic limit at room temperature.
Competing Interests: The authors declare no competing financial interest.
(© 2023 UChicago Argonne, LLC, Operator of Argonne National Laboratory. Published by American Chemical Society.)
Databáze: MEDLINE
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