Electron microscope
hideAn electron microscope is a type of microscope that uses a particle beam of electrons to illuminate a specimen and create a highly-magnified image. Electron microscopes have much greater resolving power than light microscopes that use electromagnetic radiation and can obtain much higher magnifications of up to 2 million times, while the best light microscopes are limited to magnifications of 2000 times. Both electron and light microscopes have resolution limitations, imposed by the wavelength of the radiation they use. The greater resolution and magnification of the electron microscope is because the wavelength of an electron; its de Broglie wavelength is much smaller than that of a photon of visible light.
The electron microscope uses electrostatic and electromagnetic lenses in forming the image by controlling the electron beam to focus it at a specific plane relative to the specimen. This manner is similar to how a light microscope uses glass lenses to focus light on or through a specimen to form an image.
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News tagged with electron microscopy
Caltech 4-D microscope revolutionizes the way we look at the nano world
Nov 20, 2008 |
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More than a century ago, the development of the earliest motion picture technology made what had been previously thought "magical" a reality: capturing and recreating the movement and dynamism of the world ...
Scientists Image the 'Anatomy' of a Molecule (w/ Video)
Aug 28, 2009 |
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(PhysOrg.com) -- For the first time, IBM researchers in Zurich, Switzerland, have taken a 3D image of an individual molecule. Using an atomic force microscope, the researchers constructed a "force map" of ...
Electron microscopy enters the picometer scale
Jul 24, 2008 |
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Jülich scientists have succeeded in precisely measuring atomic spacings down to a few picometres using new methods in ultrahigh-resolution electron microscopy. This makes it possible to find out decisive parameters ...
To peer inside a living cell
Oct 06, 2009 |
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(PhysOrg.com) -- Quantum mechanics could help build ultra-high-resolution electron microscopes that won't destroy living cells, according to MIT electrical engineers.
Computational microscope peers into the working ribosome (w/ Video)
Nov 23, 2009 |
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Two new studies reveal in unprecedented detail how the ribosome interacts with other molecules to assemble new proteins and guide them toward their destination in biological cells. The studies used molecular ...
Researchers Record First Real-Time Direct Observations of Nanocrystal Growth in Solution (w/ Video)
Aug 07, 2009 |
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(PhysOrg.com) -- The veil is being lifted from the once unseen world of molecular activity. Not so long ago only the final products were visible and scientists were forced to gauge the processes behind those ...
Neurons found to be similar to Electoral College
Medicine & Health / Neuroscience
Sep 14, 2009 |
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A tiny neuron is a very complicated structure. Its complex network of dendrites, axons and synapses is constantly dealing with information, deciding whether or not to send a nerve impulse, to drive a certain action.
Seeing the small picture: X-ray nanoprobe pushes observation to ever smaller frontiers
Mar 02, 2009 |
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(PhysOrg.com) -- Try to picture putting some atoms under a microscope. Even if you could pick them up, put them on a slide and get them to stay still, you still could not see them with even the most powerful ...
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Even after nine months soaking in the womb, a newborn's skin is smooth - unlike an adult's in the bath. While occupying a watery, warm environment, the newborn manages to develop a skin fully equipped to protect ...
A safe approach to nanotechnology: Boiling up zinc oxide nanorods without toxic solvents
Nanotechnology / Nanomaterials
Aug 19, 2009 |
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A non-toxic and environmentally friendly way to make tiny nanorods of zinc oxide has been developed for the first time by researchers in Saudi Arabia. The approach, described in the current issue of the International Journal of ...
Imaging a catalyst one atom at a time
Nanotechnology / Nanomaterials
Nov 09, 2009 |
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(PhysOrg.com) -- The catalytic processes that facilitate the production of many chemicals and fuels could become much more environmentally friendly thanks to a breakthrough achieved by researchers from Lehigh ...
Small nanoparticles bring big improvement to medical imaging
Nanotechnology / Bio & Medicine
Nov 18, 2009 |
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If you're watching the complex processes in a living cell, it is easy to miss something important—especially if you are watching changes that take a long time to unfold and require high-spatial-resolution ...
PICO and SALVE: Understanding the subatomic world better
Dec 18, 2008 |
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Two new high-resolution transmission electron microscopes, co-financed by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation), are set to open up new opportunities for research in physics and materials science. ...
FBI unveils science of anthrax investigation
Aug 22, 2008 |
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They have worked for almost seven years in secret. Most people did not know that the work in Ray Goehner's materials characterization department at Sandia National Laboratories was contributing important information ...
Laser-created temporal lens could lead to movies of molecular processes
Jun 29, 2009 |
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(PhysOrg.com) -- Finding a way to observe and record the behavior of matter at the molecular level has long been a holy grail among physicists. That ability could open the door to a wide range of applications ...
