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 microscope
Tiny Test Tube Experiment Shows Reaction Of Melting Materials at the Nano Scale (w/ Video)
Oct 15, 2009 |
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(PhysOrg.com) -- Researchers at The University of Texas at Austin have conducted a basic chemistry experiment in what is perhaps the world's smallest test tube, measuring a thousandth the diameter of a human hair.
Stretching the Golgi: a link between form and function
Oct 15, 2009 |
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A research team at the University of California, San Diego School of Medicine has provided a surprisingly simple explanation for the mechanism and features of the "Golgi apparatus" - a structure that has baffled ...
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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.
Simultaneous Nanoscale Imaging of Surface and Bulk Atoms
Sep 21, 2009 |
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(PhysOrg.com) -- Brookhaven Lab scientists have developed a new scanning electron microscope capable of selectively imaging single atoms on a surface while simultaneously probing atoms throughout the sample?s ...
Iridescence found in 40-million-year-old fossil bird feather
Other Sciences / Archaeology & Fossils
Aug 26, 2009 |
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Known for their wide variety of vibrant plumage, birds have evolved various chemical and physical mechanisms to produce these beautiful colors over millions of years. A team of paleontologists and ornithologists ...
Tiny robots get a grip on nanotubes
Aug 17, 2009 |
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(PhysOrg.com) -- How do you handle the tiny components needed for constructing nanoscale devices? A European consortium has built two microrobotic demonstrators that can automatically pick up and install carbon nanotubes ...
New wonder material, one-atom thick, has scientists abuzz
Nanotechnology / Nanomaterials
Jul 13, 2009 |
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Imagine a carbon sheet that's only one atom thick but is stronger than diamond and conducts electricity 100 times faster than the silicon in computer chips. That's graphene, the latest wonder material coming out ...
'Writing' Patterns on Carbon Nanotubes With Polymer Chains
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May 19, 2009 |
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(PhysOrg.com) -- Carbon nanotubes are at the center of the nanoelectronics research movement, with scientists making great progress toward getting nanotube-based electronic devices into the hands of consumers. ...
Exhibition showcases the 'art of science'
May 14, 2009 |
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The online gallery for Princeton University's third Art of Science competition will go live Thursday, May 14, at noon EDT. An online site that allows members of the public to choose their favorite 2009 Art ...
Focus on the formation of bones, teeth and shells
Nanotechnology / Bio & Medicine
May 14, 2009 |
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Researchers at Eindhoven University of Technology for the first time have shown the earliest stages in biomineralization, the process that leads to the formation of bones, teeth and sea shells.
World's smallest incandescent (nano)lamp with carbon nanotube filament
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(PhysOrg.com) -- In an effort to explore the boundary between thermodynamics and quantum mechanics -- two fundamental yet seemingly incompatible theories of physics -- a team from the UCLA Department of Physics ...
White blood cells move like millipedes, scientists show
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How do white blood cells - immune system 'soldiers' - get to the site of infection or injury? To do so, they must crawl swiftly along the lining of the blood vessel - gripping it tightly to avoid being swept away in the blood ...
Solving the chalk mystery
Space & Earth / Earth Sciences
Apr 24, 2009 |
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A piece of chalk in a laboratory at the University of Stavanger in Norway may be the key to unlock a great mystery. If the mystery is solved, it will generate billions in additional income for the oil industry. Associate ...
Bird Feathers Produce Color Through Structure Similar to Beer Foam
Apr 02, 2009 |
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(PhysOrg.com) -- Some of the brightest colors in nature are created by tiny nanostructures with a structure similar to beer foam or a sponge, according to Yale University researchers.
Researchers bring new brain mapping capabilities to desktops of scientists worldwide
Mar 31, 2009 |
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Mapping the billions of connections in the brain is a grand challenge in neuroscience. The current method for mapping interconnected brain cells involves the use of room-size microscopes known as transmission electron microscopes ...
