Physical basics of scanning electron microscopy in volume electron microscopy

Area of Science:

• Electron Microscopy
• Biological Imaging
• Biophysics

Background:

• Volume electron microscopy (vEM) is crucial for 3D biological structure analysis.
• Scanning electron microscopy (SEM) advancements now enable high-resolution vEM.
• Various SEM types offer distinct advantages for vEM research.

Purpose of the Study:

• To explain the underlying physics of SEM for vEM.
• To detail signal electron generation and detection mechanisms.
• To guide the selection of appropriate SEM technology for optimal vEM imaging.

Main Methods:

• Explanation of signal electron generation physics in SEM.
• Review of different SEM objective lens configurations.
• Analysis of SEM detection systems for vEM.

Main Results:

• High-resolution imaging in SEM is enhanced by specific physics principles.
• Improved signal detection conditions are achievable through optimized SEM setups.
• Understanding these factors aids in selecting suitable SEM for vEM.

Conclusions:

• A comprehensive understanding of SEM physics is essential for effective vEM.
• Knowledge of lens and detector systems optimizes vEM data quality.
• This guidance supports researchers in choosing the best SEM for their vEM needs.