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Pulsed-beam transmission electron microscopy and radiation damage.

David J Flannigan1, Elisah J VandenBussche1

  • 1Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, MN 55455, USA; Minnesota Institute for Ultrafast Science, University of Minnesota, Minneapolis, MN 55455, USA.

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Pulsed electron beams in transmission electron microscopes (TEMs) can significantly reduce specimen damage during materials characterization. This review highlights evidence supporting pulsed-beam TEM as a viable method for mitigating beam-induced damage.

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Beam damageBeam sensitiveCryo-TEMUltrafast

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Area of Science:

  • Materials Science
  • Microscopy
  • Physics

Background:

  • Transmission electron microscopes (TEMs) are crucial for materials characterization.
  • Beam-induced damage is a significant challenge in TEM imaging.
  • Existing methods for damage mitigation have limitations.

Purpose of the Study:

  • To review the application of pulsed electron beams in TEMs.
  • To assess the effectiveness of pulsed-beam TEM for mitigating specimen damage.
  • To explore the practicality and underlying mechanisms of pulsed-beam TEM.

Main Methods:

  • Review of established damage reduction techniques in TEM.
  • Introduction to pulsed-beam TEM concepts and instrumentation.
  • Analysis of recent research on pulsed-beam effects and damage mitigation.

Main Results:

  • Pulsed electron beams offer a promising approach to reduce beam-induced damage in TEM.
  • Recent studies provide compelling evidence for the viability of pulsed-beam TEM.
  • The use of temporally structured electron beams is explored.

Conclusions:

  • Pulsed-beam TEM is a viable strategy for mitigating specimen damage.
  • Further research is needed to fully understand the mechanisms and optimize the approach.
  • Future directions include addressing current gaps in understanding and practical implementation.