An electron microscope is a microscope that uses a beam of accelerated electrons as a source of illumination. As the wavelength of an electron can be up to 100,000 times shorter than that of visible light photons, electron microscopes have a higher resolving power than light microscopes and can reveal the structure of smaller objects. A scanning transmission electron microscope has achieved better than 50 pm resolution in annular dark-field imaging mode and magnifications of up to about 10,000,000× whereas most light microscopes are limited by diffraction to about 200 nm resolution and useful magnifications below 2000×. Electron microscopes use shaped magnetic fields to form electron optical lens systems that are analogous to the glass lenses of an optical light microscope. Electron microscopes are used to investigate the ultrastructure of a wide range of biological and inorganic specimens including microorganisms, cells, large molecules, biopsy samples, metals, and crystals. Industrially, electron microscopes are often used for quality control and failure analysis. Modern electron microscopes produce electron micrographs using specialized digital cameras and frame grabbers to capture the images. (Wikipedia).
DIY Scanning Electron Microscope - Electron Gun Detail
I explain the detailed operation of the electron gun in my DIY scanning electron microscope project.
From playlist Scanning Electron Microscope
DIY Scanning Electron Microscope - Overview
Today, I finally produced an image with my DIY scanning electron microscope. I've spent the last few months working on this project, and am encouraged by today's success. There is still a lot of work left to do in making the image higher resolution, and eliminating sources of noise, howe
From playlist Scanning Electron Microscope
The Electron Microscope: Where did it come from? | Stuff of Genius
Once we exhausted the ability to magnify objects through the use of light and lenses, we had to look for a new method. Enter the electron microscope. A beam of electrons can get in more of the nooks and crannies of matter to see more detail. Stuff of Genius tells the story behind everyday
From playlist Gizmos & Widgets
Physics 59 Optical Instruments (8 of 20) The Microscope: A Closer Look
Visit http://ilectureonline.com for more math and science lectures! To donate: http://www.ilectureonline.com/donate https://www.patreon.com/user?u=3236071 We will learn how the microscope works. Previous video in this series can be seen at: https://youtu.be/lCk-nh1ilYI Next video in thi
From playlist PHYSICS 59 OPTICAL INSTRUMENTS
Electron Microscopy (TEM and SEM)
We've talked a lot about light microscopy, but this technique has inherent limitations in resolution and magnification. The next paradigm in microscopy that emerged in the middle of the 20th century was electron microscopy. Because electrons have much shorter wavelengths than photons, elec
From playlist Microbiology/Infectious Diseases
DIY Scanning Electron Microscope - Operation procedure
After getting back from Maker Faire (which is always a hugely enjoyable and inspiring event), I thought that my microscope might need some repairs. As it turned out, I only had to change the filament and tighten some screws that came loose during the trip back from the Faire. The microsc
From playlist Scanning Electron Microscope
DIY Scanning Electron Microscope - Sources, Costs and References
Please visit my blog post to see the references and sources for this project: http://benkrasnow.blogspot.com/2011/03/diy-scanning-electron-microscope_26.html
From playlist Scanning Electron Microscope
Physics 59 Optical Instruments (9 of 20) Magnification of a Microscope: Simple Approach
Visit http://ilectureonline.com for more math and science lectures! To donate: http://www.ilectureonline.com/donate https://www.patreon.com/user?u=3236071 We will learn the SIMPLE approach to find the magnification of a microscope given the length of microscope=20cm, focal distance objec
From playlist PHYSICS 59 OPTICAL INSTRUMENTS
Microscopes: optical vs SEM vs TEM vs AFM
In order to examine defects and imperfections in materials, we need microscopes capable of enhancing our vision beyond the human eye capability. To access the micro, nano, and atomic scales needed we must rely on different microscopes. The microscope options vary immensely in terms of cost
From playlist Materials Sciences 101 - Introduction to Materials Science & Engineering 2020
Comparing Light And Electron Microscopes | A Level & SL IB
Hazel explains how to set up a light microscope, how light microscopes, scanning electron microscopes and transmission electron microscopes work, the advantages and disadvantages to each, and answers example past paper questions on the microscopy topic. These videos are designed to help w
From playlist A Level & IB Biology //
Part 1: Electron Guns - G. Jensen
From playlist Getting Started in Cryo-EM
Part 1: The Column - G. Jensen
From playlist Getting Started in Cryo-EM
Materialism Podcast Ep 10. Seeing with Electrons
The optical microscope was discovered in the 17th century and ever since has been a staple of scientific discovery. It uncovered germs and let humanity investigate the microscopic world. However, optical microscopes face a limit to their resolution since they rely on visible light. If mate
From playlist Materialism Podcast
Part 1: Sample Chamber - G. Jensen
From playlist Getting Started in Cryo-EM
Electron beam control in a scanning electron microscope
I describe electron beam optics and deflection as they are employed in scanning electron microscopy. http://web.jfet.org/vclk/ - Deflection amplifier http://www.johngineer.com/blog/?p=648 - CRT Christmas tree http://www.fei.com/ - FEI Company
From playlist Scanning Electron Microscope
Petar Petrov - Laser phase-contrast transmission electron microscopy & computational opportunities
Recorded 15 November 2022. Petar Petrov of the University of California, Berkeley, presents "Laser phase-contrast transmission electron microscopy and associated computational opportunities" at IPAM's Cryo-Electron Microscopy and Beyond Workshop. Abstract: A phase plate can provide optimum
From playlist 2022 Cryo-Electron Microscopy and Beyond