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Related Concept Videos

Transmission Electron Microscopy01:15

Transmission Electron Microscopy

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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...
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Overview of Electron Microscopy01:25

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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.
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Scanning Electron Microscopy01:07

Scanning Electron Microscopy

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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
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Overview of Microscopy Techniques01:22

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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...
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Electron Microscope Tomography and Single-particle Reconstruction01:07

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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
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Cryo-electron Microscopy01:28

Cryo-electron Microscopy

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Conventional electron microscopy (EM) involves dehydration, fixation, and staining of biological samples, which distorts the native state of biological molecules and results in several artifacts. Also, the high-energy electron beam damages the sample and makes it difficult to obtain high-resolution images. These issues can be addressed using cryo-EM, which uses frozen samples and gentler electron beams. The technique was developed by Jacques Dubochet, Joachim Frank, and Richard Henderson, for...
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Updated: Jul 10, 2025

Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis
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Accelerating Quantum Materials Development with Advances in Transmission Electron Microscopy.

Parivash Moradifar1, Yin Liu1,2, Jiaojian Shi1,3

  • 1Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States.

Chemical Reviews
|November 18, 2023
PubMed
Summary
This summary is machine-generated.

Electron microscopy (EM) advances quantum materials research by enabling atomic-scale imaging and ultrafast characterization. These techniques accelerate the development of quantum materials for future technologies.

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Area of Science:

  • Materials Science
  • Quantum Physics
  • Electron Microscopy

Background:

  • Quantum materials exhibit exotic properties crucial for next-generation technologies in sensing, communication, and computing.
  • These properties are intricately linked to atomic-scale structure, including defects and dopants.
  • Understanding and manipulating these materials requires advanced characterization techniques.

Purpose of the Study:

  • To review the role of electron microscopy (EM) in advancing quantum materials research.
  • To highlight how in situ and in operando EM techniques accelerate the discovery and application of quantum materials.
  • To discuss current limitations and future directions for EM in quantum materials science.

Main Methods:

  • Electron spectroscopies (EELS, CL, EEGS)
  • Four-dimensional scanning transmission electron microscopy (4D-STEM)
  • Dynamic and ultrafast EM (UEM)
  • Complementary ultrafast spectroscopies (UED, XFEL)
  • Atomic electron tomography (AET)

Main Results:

  • EM enables atomic-scale identification of 3D quantum defect structures.
  • Techniques allow measurement of dynamics of quantum excitations with femtosecond resolution.
  • EM facilitates mapping of exciton states, single photon emission, and nanoscale thermal transport.

Conclusions:

  • Electron microscopy is pivotal for understanding structure-function relationships in quantum materials.
  • Continued advancements in EM, particularly in low-temperature and high-resolution spectroscopy, are essential.
  • EM-driven progress will integrate quantum materials into sustainable and energy-efficient technologies.