Characterization of just one atom using synchrotron X-rays. Ajayi, T. M., Shirato, N., Rojas, T., Wieghold, S., Cheng, X., Latt, K. Z., Trainer, D. J., Dandu, N. K., Li, Y., Premarathna, S., Sarkar, S., Rosenmann, D., Liu, Y., Kyritsakas, N., Wang, S., Masson, E., Rose, V., Li, X., Ngo, A. T., & Hla, S. Nature, 618(7963):69–73, June, 2023. Number: 7963 Publisher: Nature Publishing Group![Characterization of just one atom using synchrotron X-rays [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Since the discovery of X-rays by Roentgen in 1895, its use has been ubiquitous, from medical and environmental applications to materials sciences1–5. X-ray characterization requires a large number of atoms and reducing the material quantity is a long-standing goal. Here we show that X-rays can be used to characterize the elemental and chemical state of just one atom. Using a specialized tip as a detector, X-ray-excited currents generated from an iron and a terbium atom coordinated to organic ligands are detected. The fingerprints of a single atom, the L2,3 and M4,5 absorption edge signals for iron and terbium, respectively, are clearly observed in the X-ray absorption spectra. The chemical states of these atoms are characterized by means of near-edge X-ray absorption signals, in which X-ray-excited resonance tunnelling (X-ERT) is dominant for the iron atom. The X-ray signal can be sensed only when the tip is located directly above the atom in extreme proximity, which confirms atomically localized detection in the tunnelling regime. Our work connects synchrotron X-rays with a quantum tunnelling process and opens future X-rays experiments for simultaneous characterizations of elemental and chemical properties of materials at the ultimate single-atom limit.
@article{ajayi_characterization_2023,
title = {Characterization of just one atom using synchrotron {X}-rays},
volume = {618},
copyright = {2023 This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply},
issn = {1476-4687},
url = {https://www.nature.com/articles/s41586-023-06011-w},
doi = {10.1038/s41586-023-06011-w},
abstract = {Since the discovery of X-rays by Roentgen in 1895, its use has been ubiquitous, from medical and environmental applications to materials sciences1–5. X-ray characterization requires a large number of atoms and reducing the material quantity is a long-standing goal. Here we show that X-rays can be used to characterize the elemental and chemical state of just one atom. Using a specialized tip as a detector, X-ray-excited currents generated from an iron and a terbium atom coordinated to organic ligands are detected. The fingerprints of a single atom, the L2,3 and M4,5 absorption edge signals for iron and terbium, respectively, are clearly observed in the X-ray absorption spectra. The chemical states of these atoms are characterized by means of near-edge X-ray absorption signals, in which X-ray-excited resonance tunnelling (X-ERT) is dominant for the iron atom. The X-ray signal can be sensed only when the tip is located directly above the atom in extreme proximity, which confirms atomically localized detection in the tunnelling regime. Our work connects synchrotron X-rays with a quantum tunnelling process and opens future X-rays experiments for simultaneous characterizations of elemental and chemical properties of materials at the ultimate single-atom limit.},
language = {en},
number = {7963},
urldate = {2023-06-01},
journal = {Nature},
author = {Ajayi, Tolulope M. and Shirato, Nozomi and Rojas, Tomas and Wieghold, Sarah and Cheng, Xinyue and Latt, Kyaw Zin and Trainer, Daniel J. and Dandu, Naveen K. and Li, Yiming and Premarathna, Sineth and Sarkar, Sanjoy and Rosenmann, Daniel and Liu, Yuzi and Kyritsakas, Nathalie and Wang, Shaoze and Masson, Eric and Rose, Volker and Li, Xiaopeng and Ngo, Anh T. and Hla, Saw-Wai},
month = jun,
year = {2023},
note = {Number: 7963
Publisher: Nature Publishing Group},
keywords = {Characterization and analytical techniques, Chemical physics},
pages = {69--73},
}
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