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Related Concept Videos

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...
Determination of Crystal Structures01:29

Determination of Crystal Structures

In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
X-ray Crystallography02:18

X-ray Crystallography

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
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...

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Related Experiment Video

Updated: May 14, 2026

Picometer-Precision Atomic Position Tracking through Electron Microscopy
15:04

Picometer-Precision Atomic Position Tracking through Electron Microscopy

Published on: July 3, 2021

Electron tomography resolves a novel crystal structure in a binary nanocrystal superlattice.

Mark P Boneschanscher1, Wiel H Evers, Weikai Qi

  • 1Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, University Utrecht, Princetonplein 1, 3584 CC Utrecht, The Netherlands.

Nano Letters
|February 14, 2013
PubMed
Summary

Electron tomography reveals complex 3D nanocrystal superlattice structures, overcoming limitations of transmission electron microscopy for understanding novel material properties.

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Spark Plasma Sintering Apparatus Used for the Formation of Strontium Titanate Bicrystals
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Spark Plasma Sintering Apparatus Used for the Formation of Strontium Titanate Bicrystals

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Last Updated: May 14, 2026

Picometer-Precision Atomic Position Tracking through Electron Microscopy
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Published on: July 3, 2021

Spark Plasma Sintering Apparatus Used for the Formation of Strontium Titanate Bicrystals
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Published on: February 9, 2017

Area of Science:

  • Colloidal science
  • Nanomaterials science
  • Crystallography

Background:

  • Binary superlattices formed by self-assembling nanocrystals offer unique properties due to inter-nanocrystal interactions.
  • Understanding the precise superlattice structure and defects is crucial for predicting electrical and optical properties.

Purpose of the Study:

  • To resolve the three-dimensional crystal structure of a complex binary superlattice.
  • To demonstrate the capability of electron tomography in overcoming transmission electron microscopy limitations.

Main Methods:

  • Utilized electron tomography to analyze a binary superlattice with [PbSe]6[CdSe]19 stoichiometry.
  • Compared results with conventional transmission electron microscopy (TEM).

Main Results:

  • Successfully resolved a complex 3D superlattice structure previously unresolvable by TEM alone.
  • Demonstrated electron tomography's ability to identify structures with no atomic analogue.
  • Showcased tomography's effectiveness in overcoming interference from planar defects.

Conclusions:

  • Electron tomography is essential for characterizing complex nanocrystal superlattices.
  • This technique enables deeper understanding of structure-property relationships in novel nanomaterials.