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Related Concept Videos

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.
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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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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.
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Super-resolution Fluorescence Microscopy01:37

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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Transmission Electron Microscopy01:15

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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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Preparation and Observation of Thick Biological Samples by Scanning Transmission Electron Tomography
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High-resolution, high-throughput imaging with a multibeam scanning electron microscope.

A L Eberle1, S Mikula2, R Schalek3

  • 1Carl Zeiss Microscopy GmbH, Oberkochen, Germany.

Journal of Microscopy
|January 29, 2015
PubMed
Summary
This summary is machine-generated.

High-speed electron microscopy is now possible using multiple electron beams to overcome speed limitations. This breakthrough enables rapid imaging of diverse samples, from brain tissue to semiconductor wafers.

Keywords:
High-throughput imagingmultibeamparallel data acquisitionscanning electron microscopy

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Last Updated: Apr 18, 2026

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Area of Science:

  • Materials Science
  • Biophysics
  • Microscopy Technology

Background:

  • Single-beam scanning electron microscopes (SEMs) face limitations in maximal imaging speed.
  • These limitations are primarily due to electron-electron interactions and detector bandwidth.

Purpose of the Study:

  • To significantly increase the imaging speed of scanning electron microscopy.
  • To overcome the inherent speed limitations of conventional single-beam SEMs.

Main Methods:

  • Implementation of multiple electron beams within a single microscope column.
  • Parallel detection of secondary electrons.

Main Results:

  • Achieved an increase in imaging speed by approximately two orders of magnitude.
  • Demonstrated successful high-speed imaging across a range of sample types.

Conclusions:

  • The developed multi-beam parallel detection technique dramatically enhances SEM imaging speed.
  • This advancement opens new possibilities for rapid analysis of biological and material samples.