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Updated: Jul 1, 2026
08:28
In situ TEM of Biological Assemblies in Liquid
Published on: December 30, 2013
Imaging of transient structures using nanosecond in situ TEM
Judy S Kim1, Thomas Lagrange, Bryan W Reed
1Materials Science and Technology Division, Lawrence Livermore National Laboratory (LLNL), Livermore, CA 94550, USA. kim46@llnl.gov
Science (New York, N.Y.)
|September 13, 2008
Summary
Researchers observed nanoscale material dynamics using a novel dynamic transmission electron microscope (TEM). This technique captured rapid, in situ reactions, revealing transient cellular structures during self-propagating high-temperature synthesis.
Area of Science:
- Materials Science
- Nanotechnology
- Physical Chemistry
Background:
- Material microstructure and properties are governed by dynamic nanoscale processes.
- Transmission electron microscopy (TEM) offers spatial resolution but lacks the temporal resolution to observe these events directly.
Purpose of the Study:
- To develop and utilize a dynamic TEM with nanosecond resolution for observing rapid material transformations.
- To investigate the in situ dynamics of reactive nanolaminates during self-propagating high-temperature synthesis.
Main Methods:
- Employing a photoemitted electron pulse to achieve "snapshot" diffraction and imaging.
- Utilizing a dynamic transmission electron microscope (TEM) with 15-nanosecond temporal resolution.
Main Results:
- Direct in situ observation of a moving reaction front in reactive nanolaminates.
- Time-resolved imaging and diffraction revealed a transient cellular morphology.
- Evidence of brief phase separation during the cooling phase of the reaction front was observed.
Conclusions:
- The dynamic TEM provides unprecedented insights into nanoscale reaction mechanisms.
- The observed cellular morphology and phase separation offer crucial data for understanding self-propagating high-temperature synthesis.
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