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Characterizing the geometry of InAs nanowires using mirror electron microscopy
S M Kennedy1, M Hjort, B Mandl
1School of Physics, Monash University, Victoria 3800, Australia.
Nanotechnology
|March 9, 2012
Summary
Mirror electron microscopy (MEM) reveals details of indium arsenide (InAs) nanowires. Caustic imaging theory helps interpret complex MEM images, enabling quantitative measurements like nanowire width.
Area of Science:
- Materials Science
- Nanotechnology
- Electron Microscopy
Background:
- Mirror electron microscopy (MEM) is a non-destructive technique for imaging nanomaterials.
- MEM imaging of indium arsenide (InAs) nanowires often produces complex caustic features.
- These features can be challenging to interpret in relation to nanowire properties.
Purpose of the Study:
- To apply caustic imaging theory to understand MEM contrast in InAs nanowires.
- To correlate observed caustic features with nanowire geometry and composition.
- To enable quantitative analysis of nanowire properties using MEM.
Main Methods:
- Utilized caustic imaging theory to analyze MEM data.
- Applied the theory to interpret contrast in MEM images of InAs nanowires.
- Performed a through-focus series of MEM images for analysis.
Main Results:
- Developed a theoretical framework to interpret MEM image contrast.
- Successfully related specific caustic features to InAs nanowire characteristics.
- Demonstrated the ability to obtain quantitative measurements, such as nanowire width.
Conclusions:
- Caustic imaging theory provides a crucial tool for interpreting MEM images of InAs nanowires.
- MEM, when analyzed with this theory, can yield quantitative structural information.
- This approach enhances the utility of MEM for nanomaterial characterization.
