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      • Araldite epoxy resin is commonly used as an embedding medium for electron microscopy. Some Flamenco guitarists (e.g. Paco Peña) use it to reinforce their fingernails. Brian May used it to seal the pickups in his homemade Red Special guitar to prevent microphonic feedback.
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    In 1926, Hans Buschdeveloped the electromagnetic lens. According to Dennis Gabor, the physicist Leó Szilárd tried in 1928 to convince him to build an electron microscope, for which he had filed a patent. The first prototype electron microscope, capable of four-hundred-power magnification, was developed in 1931 by the physicist Ernst Ruska and the e...

    Transmission electron microscope

    The original form of the electron microscope, the transmission electron microscope (TEM), uses a high voltage electron beam to illuminate the specimen and create an image. The electron beam is produced by an electron gun, commonly fitted with a tungsten filament cathode as the electron source. The electron beam is accelerated by an anode typically at +100 keV (40 to 400 keV) with respect to the cathode, focused by electrostatic and electromagnetic lenses, and transmitted through the specimen...

    Scanning electron microscope

    The SEM produces images by probing the specimen with a focused electron beam that is scanned across a rectangular area of the specimen (raster scanning). When the electron beam interacts with the specimen, it loses energy by a variety of mechanisms. The lost energy is converted into alternative forms such as heat, emission of low-energy secondary electrons and high-energy backscattered electrons, light emission (cathodoluminescence) or X-rayemission, all of which provide signals carrying info...

    Reflection electron microscope

    In the reflection electron microscope (REM) as in the TEM, an electron beam is incident on a surface but instead of using the transmission (TEM) or secondary electrons (SEM), the reflected beam of elastically scattered electrons is detected. This technique is typically coupled with reflection high energy electron diffraction (RHEED) and reflection high-energy loss spectroscopy (RHELS).[citation needed] Another variation is spin-polarized low-energy electron microscopy (SPLEEM), which is used...

    In their most common configurations, electron microscopes produce images with a single brightness value per pixel, with the results usually rendered in greyscale.However, often these images are then colourized through the use of feature-detection software, or simply by hand-editing using a graphics editor. This may be done to clarify structure or f...

    Materials to be viewed under an electron microscope may require processing to produce a suitable sample. The technique required varies depending on the specimen and the analysis required: 1. Chemical fixation – for biological specimens aims to stabilize the specimen's mobile macromolecular structure by chemical crosslinking of proteins with aldehyd...

    Electron microscopes are expensive to build and maintain, but the capital and running costs of confocal light microscopesystems now overlaps with those of basic electron microscopes. Microscopes designed to achieve high resolutions must be housed in stable buildings (sometimes underground) with special services such as magnetic field canceling syst...

    An Introduction to Electron Microscopy Archived 2013-07-19 at the Wayback Machine: resources for teachers and students
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