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Cones and spirals: Multi-axis acquisition for scalar and vector electron tomography.
George R Lewis1, Emilie Ringe1, Paul A Midgley2
1Department of Materials Science and Metallurgy, University of Cambridge, Charles Babbage Road, Cambridge CB3 0FS, UK; Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK.
Ultramicroscopy
|June 9, 2023
Summary
New multi-axis tilt schemes, including spiral and conical, can significantly improve 3D reconstructions in electron tomography (ET) for both electron density and magnetic fields. This research enhances ET acquisition and reconstruction methods for nanomaterials.
Area of Science:
- Materials Science
- Physics
- Chemistry
Background:
- Electron tomography (ET) is crucial for 3D nanomaterial analysis.
- Current ET methods primarily use single-axis or dual-axis tilt schemes.
- Recent advances allow scalar (electron density) and vector (magnetic fields) reconstructions.
Purpose of the Study:
- To investigate multi-axis tilt schemes for enhanced ET reconstruction fidelity.
- To explore conical and spiral tilt schemes for scalar and magnetic vector ET.
- To establish a foundation for novel ET acquisition and reconstruction approaches.
Main Methods:
- Systematic simulations of multi-axis tilt schemes.
- Proof-of-concept experimental validation.
- Comparison with conventional single-axis and dual-axis schemes.
Main Results:
- Spiral and conical tilt schemes demonstrate potential for improved reconstruction fidelity.
- Multi-axis schemes offer advantages over conventional acquisition methods.
- Successful application in both scalar and magnetic vector ET.
Conclusions:
- Multi-axis tilt schemes represent a significant advancement in electron tomography.
- Conical and spiral tilts enhance the capabilities of ET for nanomaterial characterization.
- This work paves the way for next-generation ET acquisition strategies.
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