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German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
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The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
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Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles
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Simultaneous imaging and element differentiation by energy-resolved x-ray absorption ghost imaging.

Jin-Tao Xie, Jun-Hao Tan, Shu-Hang Bie

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    This study introduces energy-resolved X-ray absorption ghost imaging (GI) to simultaneously image and identify material composition. This technique successfully distinguished Mo, Ag, and Sn components in a sample with high spatial resolution.

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    Area of Science:

    • Physics
    • Materials Science
    • Imaging Technology

    Background:

    • X-ray absorption spectroscopy is crucial for material analysis.
    • Ghost imaging (GI) offers unique advantages for reconstructing images from limited spatial information.
    • Simultaneous elemental composition and spatial distribution imaging remains a challenge.

    Purpose of the Study:

    • To develop and demonstrate an energy-resolved X-ray absorption ghost imaging technique.
    • To simultaneously image and distinguish the elemental composition of multiple components within an object.
    • To assess the spatial resolution and practical applicability of spectral ghost imaging.

    Main Methods:

    • Utilized X-ray absorption edges for elemental identification.
    • Employed energy-resolved X-ray absorption ghost imaging (GI).
    • Spatially modulated the X-ray beam using Hadamard masks.
    • Measured transmitted X-ray intensity with an energy-resolved single-pixel detector (spectral resolution < 0.8 keV).
    • Reconstructed spectral images by correlating transmission spectra with Hadamard patterns.

    Main Results:

    • Successfully imaged and distinguished three components (Mo, Ag, Sn) with different shapes.
    • Achieved a spatial resolution of 108 µm.
    • Demonstrated simultaneous imaging of material composition and distribution.
    • Validated the practical application of spectral ghost imaging.

    Conclusions:

    • Energy-resolved X-ray absorption ghost imaging is a viable method for simultaneous elemental composition and spatial imaging.
    • The technique offers high spectral and spatial resolution for material analysis.
    • This approach holds significant potential for non-invasive analysis in biology, medical science, and other fields.