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Related Concept Videos

Overview of Electron Microscopy01:25

Overview of Electron Microscopy

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.
Transmission Electron Microscopy01:15

Transmission Electron Microscopy

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 keV in...
Scanning Electron Microscopy01:07

Scanning Electron Microscopy

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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Related Experiment Video

Updated: May 8, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Exploiting lens aberrations to create electron-vortex beams.

L Clark1, A Béché, G Guzzinati

  • 1EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium. laura.clark@ua.ac.be

Physical Review Letters
|August 27, 2013
PubMed
Summary
This summary is machine-generated.

Researchers developed a new method to create electron-vortex beams using transmission electron microscope lens aberrations. This technique precisely controls lens alignment to generate helical phase fronts for advanced electron microscopy applications.

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Single-Digit Nanometer Electron-Beam Lithography with an Aberration-Corrected Scanning Transmission Electron Microscope
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Single-Digit Nanometer Electron-Beam Lithography with an Aberration-Corrected Scanning Transmission Electron Microscope

Published on: September 14, 2018

Related Experiment Videos

Last Updated: May 8, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Single-Digit Nanometer Electron-Beam Lithography with an Aberration-Corrected Scanning Transmission Electron Microscope
10:25

Single-Digit Nanometer Electron-Beam Lithography with an Aberration-Corrected Scanning Transmission Electron Microscope

Published on: September 14, 2018

Area of Science:

  • Physics
  • Materials Science
  • Electron Microscopy

Background:

  • Electron-vortex beams with helical phase fronts are crucial for advanced microscopy.
  • Generating these beams typically requires complex setups.

Purpose of the Study:

  • To propose and demonstrate a novel, simplified method for producing electron-vortex beams.
  • To utilize transmission electron microscope (TEM) corrector lenses for beam generation.

Main Methods:

  • A model was developed based on controlled manipulation of lens aberrations.
  • Specific alignment of corrector lenses into an astigmatic state was employed.
  • An annular aperture was used in the condenser plane.

Main Results:

  • The proposed method successfully produced electron-vortex beams.
  • Experimental results closely matched theoretical simulations.
  • The technique offers precise control over helical phase front generation.

Conclusions:

  • The study demonstrates a practical and efficient method for generating electron-vortex beams.
  • This technique simplifies the production of beams essential for advanced electron microscopy.
  • The findings pave the way for wider adoption of electron-vortex beams in research.