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Related Concept Videos

Overview of Microscopy Techniques01:22

Overview of Microscopy Techniques

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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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Atomic Force Microscopy01:08

Atomic Force Microscopy

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Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
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X-ray Crystallography02:18

X-ray Crystallography

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The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
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The de Broglie Wavelength02:32

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In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
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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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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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Related Experiment Video

Updated: Mar 16, 2026

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
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Practical aspects of diffractive imaging using an atomic-scale coherent electron probe.

Z Chen1, M Weyland2, P Ercius3

  • 1School of Physics and Astronomy, Monash University, Clayton, Victoria 3800, Australia.

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|August 13, 2016
PubMed
Summary
This summary is machine-generated.

Four-dimensional scanning transmission electron microscopy (4D-STEM) captures full diffraction patterns for richer data. This technique enables advanced imaging modes and quantitative analysis, addressing practical data challenges.

Keywords:
Convergent beam electron diffractionDifferential phase contrastDiffractive imagingPhase reconstruction

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Area of Science:

  • Materials Science
  • Electron Microscopy
  • Nanotechnology

Background:

  • Conventional scanning transmission electron microscopy (STEM) uses integrating detectors, limiting the information extracted from specimens.
  • Four-dimensional scanning transmission electron microscopy (4D-STEM) acquires full two-dimensional convergent beam electron diffraction (CBED) patterns at each scan pixel.
  • These rich datasets offer potential for more detailed specimen characterization than traditional methods.

Purpose of the Study:

  • To demonstrate the capabilities of 4D-STEM for advanced imaging and quantitative analysis.
  • To explore the application of 4D-STEM on different material systems.
  • To highlight practical considerations for handling large 4D-STEM datasets.

Main Methods:

  • Acquisition of full 2D CBED patterns at every pixel in STEM mode.
  • Application of 4D-STEM to monolayer Molybdenum Disulfide (MoS2) and bulk Strontium Titanate (SrTiO3) specimens.
  • Demonstration of multiple STEM imaging modes and quantitative phase reconstruction using differential phase contrast imaging.

Main Results:

  • Successful implementation of multiple quantitative STEM imaging modes from 4D datasets.
  • Demonstration of phase reconstruction of the transmission function.
  • Validation of 4D-STEM capabilities on diverse materials like MoS2 and SrTiO3.

Conclusions:

  • 4D-STEM provides a significantly richer dataset compared to conventional STEM imaging.
  • The technique allows for advanced quantitative imaging and phase reconstruction.
  • Addressing data sampling, signal-to-noise enhancement, and data reduction is crucial for practical 4D-STEM applications.