Related Experiment Video
Updated: May 16, 2025
09:09
Targeted Studies Using Serial Block Face and Focused Ion Beam Scan Electron Microscopy
Published on: August 10, 2019
9.1K
Two- and three-dimensional electron imaging of beam-sensitive specimens.
1Physics Department, University of Alberta, Edmonton T6G 2E1, Canada.
Micron (Oxford, England : 1993)
|April 6, 2025
Summary
Radiation damage limits electron microscopy image resolution. This review defines dose-limited resolution (DLR) and explores methods to minimize beam damage in TEM and STEM imaging.
Area of Science:
- Materials Science
- Microscopy
- Physics
Background:
- Radiation damage significantly impacts the spatial resolution of Transmission Electron Microscopy (TEM) and Scanning TEM (STEM) images.
- This effect is particularly pronounced in beam-sensitive specimens.
Purpose of the Study:
- To define and evaluate dose-limited resolution (DLR) for various sample types and imaging conditions.
- To discuss radiation damage mechanisms in electron microscopy.
- To identify experimental strategies for mitigating beam damage and suggest future research directions.
Main Methods:
- Review of existing literature on radiation damage in TEM and STEM.
- Analysis of dose-limited resolution (DLR) for thin and thick samples.
- Evaluation across common imaging modes and electron-accelerating voltages up to 3 MV.
Main Results:
- Dose-limited resolution (DLR) is a key metric for image quality in electron microscopy.
- Mechanisms such as beam heating and electrostatic charging contribute to radiation damage.
- Various experimental methods can reduce beam damage, improving image resolution.
Conclusions:
- Understanding and mitigating radiation damage is crucial for high-resolution imaging of beam-sensitive materials.
- Further research into novel damage reduction techniques is warranted.
- Optimizing imaging parameters based on DLR can enhance TEM and STEM analysis.
More Related Videos
09:12Three-dimensional Characterization of Interorganelle Contact Sites in Hepatocytes using Serial Section Electron Microscopy
Published on: June 9, 2022
5.4K
08:31Sample Preparation and Experimental Design for In Situ Multi-Beam Transmission Electron Microscopy Irradiation Experiments
Published on: June 27, 2022
1.6K
Related Concept Videos
01:07Electron Microscope Tomography and Single-particle Reconstruction
2.3K
Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
2.3K
01:25Overview of Electron Microscopy
8.4K
The wavelengths of visible light ultimately limit the maximum theoretical resolution of images created by light microscopes. Most light microscopes can only magnify 1000X, and a few can magnify up to 1500X. Electrons, like electromagnetic radiation, can behave like waves, but with wavelengths of 0.005 nm, they produce significantly greater resolution up to 0.05 nm as compared to 500 nm for visible light. An electron microscope (EM) can create a sharp image that is magnified up to 2,000,000X.
8.4K
01:07Scanning Electron Microscopy
4.0K
A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
Fundamental Principles
Accelerated...
Fundamental Principles
Accelerated...
4.0K
01:15Transmission Electron Microscopy
5.3K
In 1931, physicist Ernst Ruska—building on the idea that magnetic fields can direct an electron beam just as lenses can direct a beam of light in an optical microscope—developed the first prototype of the electron microscope. This development led to the development of the field of electron microscopy. In the transmission electron microscope (TEM), electrons are produced by a hot tungsten element and accelerated by a potential difference in an electron gun, which gives them up to 400...
5.3K
01:22Overview of Microscopy Techniques
9.6K
The early pioneers of microscopy opened a window into the invisible world of microorganisms. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes that leveraged nonvisible light, such as fluorescence microscopy that uses an ultraviolet light source and electron microscopy that uses short-wavelength electron beams. These advances significantly improved magnification, image resolution, and contrast. By comparison, the...
9.6K
01:20Immunogold Electron Microscopy
3.9K
Immunoelectron microscopy utilizes immunogold labeling of endogenous proteins with specific antibodies to detect and localize these proteins in cells and tissues. The procedure provides insights into the distribution and quantification of protein under different stimulation conditions offering clues about their functions. Conjugating highly electron-dense gold particles with primary or secondary antibodies allow antigen detection on and within cells, with high resolution and specificity.
3.9K