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Updated: Jun 26, 2026
10:53
Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques
Published on: March 12, 2019
Kinetic measurements from in situ TEM observations
1LeRoy Eyring Center for Solid State Science, School of Materials, Arizona State University, Tempe, Arizona 85287-9506, USA. renu.sharma@asu.edu
Microscopy Research and Technique
|January 9, 2009
Summary
Environmental electron microscopy reveals nanoscale gas-solid interactions and reaction kinetics. In situ observations quantify material changes, aiding in understanding processes like thin film nitridation and nanowire growth.
Area of Science:
- Materials Science
- Surface Science
- Nanotechnology
Background:
- Gas-solid interactions are crucial in catalysis and materials processing.
- Observing these interactions at the nanoscale requires advanced microscopy techniques.
Purpose of the Study:
- To demonstrate the utility of environmental scanning transmission electron microscopy (ESTEM) for studying nanoscale gas-solid interactions.
- To quantify reaction rates and kinetics of various nanomaterial processes using in situ ESTEM.
- To assess the impact of electron beam exposure on experimental observations.
Main Methods:
- In situ environmental scanning transmission electron microscopy (ESTEM) for real-time observation of gas-solid reactions.
- Analysis of time and temperature-resolved data to determine reaction kinetics.
- Quantitative electron energy loss spectroscopy (EELS) for elemental analysis and reduction rate measurements.
Main Results:
- ESTEM enables direct observation of nanoscale changes during processes like thin film nitridation, nanoparticle deposition, and nanomaterial growth.
- Kinetic data (reaction rates) can be extracted from in situ ESTEM observations.
- Electron beam effects were evaluated, and quantitative EELS provided reduction rates for cerium in various oxide systems.
Conclusions:
- ESTEM is a powerful tool for investigating nanoscale gas-solid interactions and reaction kinetics.
- In situ quantitative analysis provides valuable insights into material processes.
- The methodology is applicable to diverse systems, including catalysts and thin films.
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