Electron microscopy techniques | Electron beam

4D scanning transmission electron microscopy (4D STEM) is a subset of scanning transmission electron microscopy (STEM) which utilizes a pixelated electron detector to capture a convergent beam electron diffraction (CBED) pattern at each scan location. This technique captures a 2 dimensional reciprocal space image associated with each scan point as the beam rasters across a 2 dimensional region in real space, hence the name 4D STEM. Its development was enabled by evolution in STEM detectors and improvements computational power. The technique has applications in visual diffraction imaging, phase orientation and strain mapping, phase contrast analysis, among others. The name 4D STEM is common in literature, however it is known by other names: 4D STEM EELS, ND STEM (N- since the number of dimensions could be higher than 4), position resolved diffraction (PRD), spatial resolved diffractometry, momentum-resolved STEM, "nanobeam precision electron diffraction", scanning electron nano diffraction, nanobeam electron diffraction, or pixelated STEM. (Wikipedia).

DIY Scanning Electron Microscope - Tektronix contest entry

Vote for me here: http://mytektronixscope.com/videos/ I am using my Tektronix 2246 analog oscilloscope to show the image generated by my DIY electron microscope. The 2246 is operating in X-Y mode, with the channels connected to a raster scan generator. The vertical scanning frequency

From playlist Scanning Electron Microscope

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

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

Yimo Han - Assisting 4D-STEM data processing by machine learning and Bayesian optimization

Recorded 28 October 2022. Yimo Han of Rice University presents "Assisting 4D-STEM data processing by machine learning and Bayesian optimization" at IPAM's Mathematical Advances for Multi-Dimensional Microscopy Workshop. Abstract: From the highest-resolution electron ptychography to microme

From playlist 2022 Mathematical Advances for Multi-Dimensional Microscopy

Mary Scott - Supervised and Unsupervised approaches for Electron Microscopy Data Analysis

Recorded 01 December 2022. Mary Scott of the University of California, Berkeley, presents "Supervised and Unsupervised approaches for Electron Microscopy Data Analysis" at IPAM's Multi-Modal Imaging with Deep Learning and Modeling Workshop. Abstract: Recently, materials science has undergo

From playlist 2022 Multi-Modal Imaging with Deep Learning and Modeling

Colin Ophus - Multi-dimensional scanning transmission electron microscopy to solve 3D nanostructures

Recorded 24 October 2022. Colin Ophus of Lawrence Berkeley Laboratory presents "Using multi-dimensional scanning transmission electron microscopy to solve 3D nanostructures using atomic electron tomography" at IPAM's Mathematical Advances for Multi-Dimensional Microscopy Workshop. Abstract

From playlist 2022 Mathematical Advances for Multi-Dimensional Microscopy

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 - 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

Peter Binev - Modeling in Electron Microscopy - IPAM at UCLA

Recorded 13 September 2022. Peter Binev of the University of South Carolina presents "Modeling in Electron Microscopy" at IPAM's Computational Microscopy Tutorials. Learn more online at: http://www.ipam.ucla.edu/programs/workshops/computational-microscopy-tutorials/?tab=schedule

From playlist Tutorials: Computational Microscopy 2022

An In-Depth Look at a Telequipment D52 Vacuum Tube Oscilloscope

In this episode, we take an in-depth look at a cool old oscilloscope I got my hands on – the Telequipment D52. It’s a pretty late model scope featuring dual traces, and a mixture of tubes and transistors. It’s so gorgeous inside, I couldn’t help but get a lot of beauty shots! Here’s the m

From playlist Vintage Equipment

Christoph Koch - Reconstructing 2D and 3D atomic structure from various types of TEM data

Recorded 25 October 2022. Christoph Koch of Humboldt-Universität presents "Reconstructing 2D and 3D atomic structure from various types of TEM data" at IPAM's Mathematical Advances for Multi-Dimensional Microscopy Workshop. Abstract: The scattering of fast electrons by the three-dimensiona

From playlist 2022 Mathematical Advances for Multi-Dimensional Microscopy

Juan Carlos Idrobo - Quantum Phenomena & Electron Microscopy: New Possibilities & Limitations

Recorded 28 October 2022. Juan-Carlos Idrobo of the University of Washington presents "Into the Realms of Quantum Phenomena with Electron Microscopy: Exploring New Possibilities & Limitations" at IPAM's Mathematical Advances for Multi-Dimensional Microscopy Workshop. Abstract: Electron ene

From playlist 2022 Multi-Modal Imaging with Deep Learning and Modeling

Electron microscope image capture with an oscilloscope

T-shirt: http://www.teespring.com/AppliedScience 11:10 - Skip directly to seeing the collected images I show how I collect digital electron microscope images with my Tek MDO3000 oscilloscope.

From playlist Electronics

Computational Linear Algebra 7: Compressed Sensing for CT Scans

Course materials available here: https://github.com/fastai/numerical-linear-algebra Compressed sensing is critical to allowing CT scans with lower radiation-- the image can be reconstructed with less data. Here we will learn the technique and apply it to CT images. Numpy Broadcasting Spars

From playlist Computational Linear Algebra

Peng Wang - Electron Ptychography: Emerging Computational Microscopy for Physical/Biological Science

Recorded 28 October 2022. Peng Wang of the University of Warwick presents "Electron Ptychography: An Emerging Computational Microscopy for Physical and Biological Sciences" at IPAM's Mathematical Advances for Multi-Dimensional Microscopy Workshop. Abstract: Ptychography is an emerging comp

From playlist 2022 Mathematical Advances for Multi-Dimensional Microscopy

Fluorescent microscopes are amazing!

Fluorescent microscopy was always one of my favorite parts of working with mammalian cells as it always made for spectacular images. There are a variety of techniques that make use of fluorescence microscopy, many of which are used regularly in the best labs in the world. But fluorescence

From playlist Biology and Genetics

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