AI Article Synopsis
- Measuring 3D chemical distribution in nanoscale materials has been challenging due to the rarity of inelastic scattering events, which require high beam exposure that can damage samples.
- High-resolution 3D chemical imaging was successfully achieved at nearly one-nanometer resolution in various nanomaterials using a method called fused multi-modal electron tomography.
- This technique significantly reduces radiation exposure by up to 99% by combining data from elastic and inelastic signals, allowing for accurate chemical mapping in complex materials.
Article Abstract
Measuring the three-dimensional (3D) distribution of chemistry in nanoscale matter is a longstanding challenge for metrological science. The inelastic scattering events required for 3D chemical imaging are too rare, requiring high beam exposure that destroys the specimen before an experiment is completed. Even larger doses are required to achieve high resolution. Thus, chemical mapping in 3D has been unachievable except at lower resolution with the most radiation-hard materials. Here, high-resolution 3D chemical imaging is achieved near or below one-nanometer resolution in an Au-FeO metamaterial within an organic ligand matrix, CoO-MnO core-shell nanocrystals, and ZnS-CuS nanomaterial using fused multi-modal electron tomography. Multi-modal data fusion enables high-resolution chemical tomography often with 99% less dose by linking information encoded within both elastic (HAADF) and inelastic (EDX/EELS) signals. We thus demonstrate that sub-nanometer 3D resolution of chemistry is measurable for a broad class of geometrically and compositionally complex materials.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11053043 | PMC |
| http://dx.doi.org/10.1038/s41467-024-47558-0 | DOI Listing |
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