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Updated: Jul 8, 2026
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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
Published on: April 14, 2020
Local crystal anisotropy obtained in the small probe geometry.
1IBM Thomas J. Watson Research Center, Yorktown Heights, NY 10598, USA. batson@us.ibm.com
Micron (Oxford, England : 1993)
|December 25, 2007
Summary
Spatially resolved Electron Energy Loss Spectroscopy (EELS) reveals specimen anisotropy using small probes. This technique enhances spatial resolution by analyzing scattering angles and excitation symmetries.
Area of Science:
- Materials Science
- Spectroscopy
- Solid-State Physics
Background:
- Electron Energy Loss Spectroscopy (EELS) is sensitive to scattering angle and specimen excitation symmetry.
- Past studies utilized large probes for angle-resolved EELS to determine specimen anisotropy.
- The relationship between EELS sensitivity, spatial resolution, and excitation properties is crucial.
Purpose of the Study:
- To review scattering mechanisms in spatially resolved EELS.
- To demonstrate that small probe experiments can also yield specimen anisotropy information.
- To analyze Extended Energy Loss Fine Structure (EXELFS) scattering in graphite using a small probe geometry.
Main Methods:
- Review of scattering mechanisms in spatially resolved EELS.
- Theoretical analysis of small probe EELS experiments.
- Experimental analysis of EXELFS scattering in graphite.
Main Results:
- EELS sensitivity to scattering angle and excitation symmetry is linked to spatial resolution.
- Small probe EELS experiments can be effectively used to obtain specimen anisotropy data.
- EXELFS scattering in graphite was successfully analyzed in a small probe geometry.
Conclusions:
- Spatially resolved EELS offers a pathway to determine specimen anisotropy.
- Small probe configurations provide a viable alternative for anisotropy measurements.
- The findings open new avenues for high-resolution materials characterization using EELS.
