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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...
Overview of Microscopy Techniques01:22

Overview of Microscopy Techniques

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...
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
Accelerated...
Two-Dimensional Microscopy in Microbiology01:29

Two-Dimensional Microscopy in Microbiology

Two-dimensional (2D) microscopy encompasses a range of optical techniques that capture images within a single focal plane, offering detailed representations of microscopic structures. These techniques are essential in biological and medical research, enabling the visualization of cellular and subcellular structures with different levels of contrast and specificity.There are several major types of 2D microscopy, each with strengths and applications.Bright-Field MicroscopyBright-field microscopy...
Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

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...

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Related Experiment Video

Updated: Jul 2, 2026

Microcrystal Electron Diffraction of Small Molecules
09:48

Microcrystal Electron Diffraction of Small Molecules

Published on: March 15, 2021

Microscopy in electron diffraction apparatus.

S Yamaguchi1

  • 1Muki-Zai-Ken, Sakura-mura Niihari-gun Ibaraki-ken, 300-31, Japan.

The Review of Scientific Instruments
|July 1, 1979
PubMed
Summary
This summary is machine-generated.

A new method allows simultaneous observation of electron micrographs and diffraction patterns using a charged dielectric emulsion as an electrostatic lens. This technique simplifies electron microscopy and diffraction analysis for various materials.

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Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
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Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

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Last Updated: Jul 2, 2026

Microcrystal Electron Diffraction of Small Molecules
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Microcrystal Electron Diffraction of Small Molecules

Published on: March 15, 2021

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
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Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

Area of Science:

  • Materials Science
  • Physics
  • Electron Microscopy

Background:

  • Electron microscopy and diffraction are crucial for material characterization.
  • Simultaneous observation of both techniques from a single sample is often complex.
  • Existing methods may require multiple setups or sample manipulations.

Purpose of the Study:

  • To develop a simplified method for observing both electron micrographs and diffraction figures from a single object.
  • To utilize a dielectric emulsion as an electrostatic lens for electron beam manipulation.

Main Methods:

  • A dielectric emulsion (paraffin and barium titanate) was employed as an electrostatic lens.
  • The emulsion was charged using incident electrons to focus the beam.
  • Mechanical removal of the lens allowed for immediate observation of diffraction figures.

Main Results:

  • Successfully observed both electron micrographs and diffraction figures from the same object.
  • Demonstrated the function of the charged dielectric emulsion as an effective electrostatic lens.
  • The method proved simple and efficient for combined imaging and diffraction.

Conclusions:

  • The devised method offers a straightforward approach to electron microscopy and diffraction.
  • The dielectric emulsion acts as a versatile electrostatic lens, simplifying experimental procedures.
  • This technique has potential for broader applications in materials science and nanotechnology.