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- W2068643030 abstract "The detection of photons emitted from single quantum objects is highly desirable for the diagnosis of nanoscale devices using microscopes. An extremely tiny probe (∼0.1 nm) with high current recently became available for aberration-corrected scanning transmission electron microscopy, and it is possible for individual atoms in nanoscale devices to be excited using such a highly focused probe1,2,3. Here, we demonstrate the successful detection of characteristic X-ray signals from single erbium atoms using energy-dispersive X-ray spectroscopy. The intensities of the erbium L and M lines from a single erbium atom were extremely weak in comparison to the N edge of electron energy-loss spectroscopy, demonstrating the intrinsic difficulty in sensing single atoms using X-ray spectroscopy. Nevertheless, this work will certainly help in the advance towards obtaining X-ray spectra from single atoms and to evaluate the fluorescence yield on a single-atom basis. Researchers use energy-dispersive X-ray spectroscopy to detect X-ray emission from a single erbium atom. Although the measured intensities are relatively weak, the work may allow single-atom X-ray spectra to be obtained from other atomic species." @default.
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- W2068643030 date "2012-07-08" @default.
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- W2068643030 title "Detection of photons emitted from single erbium atoms in energy-dispersive X-ray spectroscopy" @default.
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- W2068643030 doi "https://doi.org/10.1038/nphoton.2012.148" @default.
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