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Phase plates in the transmission electron microscope: operating principles and applications.

Marek Malac1,2, Simon Hettler3, Misa Hayashida1

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Microscopy (Oxford, England)
|November 15, 2020
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Summary

This review covers Volta phase plate imaging in transmission electron microscopy. It details the hole-free phase plate

Keywords:
Volta phase plate (VPP)cryo electron microscopyelectron beam-induced sample charginghole-free phase plate (HFPP)radiation damagesample contamination

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Area of Science:

  • Electron Microscopy
  • Materials Science
  • Physics

Background:

  • Phase plate imaging enhances contrast in transmission electron microscopy (TEM).
  • Traditional phase plates face challenges with hole-related artifacts and contamination.
  • The Volta phase plate offers a hole-free design for improved imaging.

Purpose of the Study:

  • To review the current status of phase plate imaging in TEM.
  • To focus on the hole-free Volta phase plate design.
  • To discuss its implementation, operating principles, applications, and theoretical underpinnings.

Main Methods:

  • Review of existing literature and research on phase plate technology.
  • Analysis of the design and operational principles of the Volta phase plate.
  • Development of an imaging theory incorporating inelastic scattering effects.

Main Results:

  • The Volta phase plate represents a significant advancement in hole-free phase plate design.
  • Detailed discussion on the practical implementation and diverse applications of this technique.
  • A theoretical framework is presented that accounts for inelastic scattering in both sample and plate.

Conclusions:

  • The Volta phase plate is a key development for high-contrast TEM imaging.
  • Understanding its operating principles and theoretical basis is crucial for its effective application.
  • This technology holds promise for advancing nanoscale imaging and analysis.