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Obtaining 3D Chemical Maps by Energy Filtered Transmission Electron Microscopy Tomography
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3D multi-energy deconvolution electron microscopy.

Michiel de Goede1, Eric Johlin1, Beniamino Sciacca1

  • 1FOM Institute AMOLF, Amsterdam, 1098 XG, The Netherlands.

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|December 14, 2016
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Summary
This summary is machine-generated.

This study introduces a non-destructive method for 3D nanomaterial characterization using multi-energy backscattered electron imaging. The technique reconstructs 3D structures by deconvolving signals, offering an alternative to destructive methods.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electron Microscopy

Background:

  • Traditional 3D nanomaterial characterization methods like focused ion beam (FIB) milling and transmission electron microscope tomography are often destructive or require thin samples.
  • These limitations hinder the analysis of nanomaterials in their native, bulk forms.

Purpose of the Study:

  • To develop a non-destructive technique for 3D characterization of nanomaterials on bulk substrates.
  • To enable depth-resolved imaging by analyzing backscattered electron (BSE) signals at varying primary beam energies.

Main Methods:

  • Utilizing multi-energy backscattered electron (BSE) imaging to probe sample depth.
  • Applying a blind source separation deconvolution algorithm to reconstruct 3D geometry from BSE images.
  • Validating the 3D reconstructions using focused ion beam (FIB) cross-sectional imaging.

Main Results:

  • Demonstrated a novel approach for non-destructive 3D structural analysis of nanomaterials.
  • Successfully reconstructed the three-dimensional geometry of samples by deconvolving BSE emission profiles.
  • Achieved qualitative agreement between the reconstructed 3D structure and FIB-verified cross-sections.

Conclusions:

  • The developed multi-energy BSE imaging and deconvolution technique offers a valuable non-destructive alternative for 3D nanomaterial characterization.
  • This method allows for the investigation of complex nanostructures on bulk substrates without sample damage.
  • Future applications could include in-situ monitoring and analysis of materials in their operational environments.