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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.
Three-Dimensional Microscopy in Microbiology01:28

Three-Dimensional Microscopy in Microbiology

Three-dimensional imaging techniques are essential in cell biology, allowing researchers to visualize intricate cellular structures with high resolution. Two prominent methods, Differential Interference Contrast Microscopy (DIC) and Confocal Scanning Laser Microscopy (CSLM), provide distinct advantages for imaging live and thick specimens, respectively.Differential Interference Contrast MicroscopyDIC microscopy enhances contrast in transparent, unstained samples by converting phase...
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...
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...
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...
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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Updated: Jun 14, 2026

Obtaining 3D Chemical Maps by Energy Filtered Transmission Electron Microscopy Tomography
08:15

Obtaining 3D Chemical Maps by Energy Filtered Transmission Electron Microscopy Tomography

Published on: June 9, 2018

4次元電子顕微鏡による電子顕微鏡

Ahmed H Zewail1

  • 1Physical Biology Center for Ultrafast Science & Technology, California Institute of Technology, Pasadena, CA 91125, USA. zewail@caltech.edu

Science (New York, N.Y.)
|April 10, 2010
PubMed
まとめ
この要約は機械生成です。

超高速電子顕微鏡 (4D UEM) は,時間を4次元として導入し,原子規模の3Dイメージングを可能にします. この高度な技術は,素材と生物学におけるダイナミックなプロセスを,前例のない解像度で視覚化します.

さらに関連する動画

Visualization of Endosome Dynamics in Living Nerve Terminals with Four-dimensional Fluorescence Imaging
10:51

Visualization of Endosome Dynamics in Living Nerve Terminals with Four-dimensional Fluorescence Imaging

Published on: April 16, 2014

Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles
10:00

Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles

Published on: July 5, 2016

関連する実験動画

Last Updated: Jun 14, 2026

Obtaining 3D Chemical Maps by Energy Filtered Transmission Electron Microscopy Tomography
08:15

Obtaining 3D Chemical Maps by Energy Filtered Transmission Electron Microscopy Tomography

Published on: June 9, 2018

Visualization of Endosome Dynamics in Living Nerve Terminals with Four-dimensional Fluorescence Imaging
10:51

Visualization of Endosome Dynamics in Living Nerve Terminals with Four-dimensional Fluorescence Imaging

Published on: April 16, 2014

Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles
10:00

Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles

Published on: July 5, 2016

科学分野:

  • 物理 物理学 物理学とは
  • マテリアルサイエンス 材料科学
  • 生物学 生物学 生物学とは
  • 顕微鏡による顕微鏡検査

背景:

  • 電子顕微鏡は強力なイメージングツールであり,原子スケールでの3D構造を解明します.
  • その応用は,材料科学と生物学を網羅しています.
  • 従来の顕微鏡は記録速度によって制限されており,ダイナミックなプロセスの研究を妨げています.

研究 の 目的:

  • 電子顕微鏡における最近の進歩を振り返り,4番目の次元:時間.
  • 超高速電子顕微鏡 (4D UEM) の能力を強調する.
  • 4D電子顕微鏡の新興アプリケーションと将来の方向性を議論します.

主な方法:

  • 電子顕微鏡における第4次元としての時間の導入.
  • シングルエレクトロンストロボスコープ画像技術.
  • 4D UEMのバリエーションの開発:収束ビーム,近地画像,トモグラフィー,スキャニングパルス顕微鏡.

主要な成果:

  • 超高速電子顕微鏡 (4D UEM) は,従来の方法よりも10倍の解像度を達成します.
  • 長さや時間スケールで展開する複雑な構造の可視化を可能にします.
  • ダイナミックなナノマテリアルとバイオ構造物のイメージングにおけるアプリケーションを実証します.

結論:

  • 4D UEMは,時間次元を追加することで,画像処理能力を大幅に強化します.
  • この技術は,原子解像度で動的現象の研究を可能にします.
  • 将来の研究は,ナノ材料,生物構造,時空画像のさらなる応用を探求する.