News tagged with electron microscope
High-temperature superconductivity starts at nanoscale
(Phys.org) -- High-temperature superconductivity doesn't happen all it once. It starts in isolated nanoscale patches that gradually expand until they take over.
8 hours ago |
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A new look at Apollo samples supports ancient impact theory
New investigations of lunar samples collected during the Apollo missions have revealed origins from beyond the Earth-Moon system, supporting a hypothesis of ancient cataclysmic bombardment for both worlds.
Space & Earth / Space Exploration
May 24, 2012 |
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Study of moon rocks shows barrage 4 billion years ago was mainly asteroids
(Phys.org) -- Researchers have known for some years that the Earth and moon were subjected to a veritable barrage of objects striking their surfaces nearly four million years ago, but less certain was whether ...
Space & Earth / Space Exploration
May 18, 2012 |
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In metallic glasses, researchers find a few new atomic structures
Drawing on powerful computational tools and a state-of-the-art scanning transmission electron microscope, a team of University of Wisconsin-Madison and Iowa State University materials science and engineering researchers has ...
May 11, 2012 |
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First atomic-scale real-time movies of platinum nanocrystal growth in liquids
They won't be coming soon to a multiplex near you, but movies showing the growth of platinum nanocrystals at the atomic-scale in real-time have blockbuster potential. A team of scientists with the Lawrence ...
Nanotechnology / Nanomaterials
Apr 19, 2012 |
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Physics group uses graphene to allow electron microscopy of liquid objects
(Phys.org) -- News of new uses for graphene continue to come in with remarkable regularity, and now a team of physicists, as they describe in their paper published in the journal Science, have figured out a ...
Apr 06, 2012 |
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Physicists control quantum tunneling with light for the first time
Scientists at the Cavendish Laboratory in Cambridge have used light to help push electrons through a classically impenetrable barrier. While quantum tunnelling is at the heart of the peculiar wave nature of particles, this ...
Apr 05, 2012 |
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Discovery of new catalyst promises cheaper, greener drugs
A chemistry team at the University of Toronto has discovered environmentally-friendly iron-based nanoparticle catalysts that work as well as the expensive, toxic, metal-based catalysts that are currently in wide use by the ...
Nanotechnology / Nanomaterials
Mar 27, 2012 |
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Ticks found able to survive being subjected to electron microscopy
(PhysOrg.com) -- Most people know that ticks are rather hardy little creatures, killing them generally takes some severe bashing with a blunt object, or incineration in an open fire. But few likely suspected ...
Mar 19, 2012 |
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Researchers discover new method of making nanoparticles
(PhysOrg.com) -- An engineering researcher at the University of Arkansas and his colleagues at the University of Utah have discovered a new method of making nanoparticles and nanofilms to be used in developing better electronic ...
Nanotechnology / Nanomaterials
Mar 06, 2012 |
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Human origins traced to worm fossil in Canada
(PhysOrg.com) -- Most primitive known vertebrate and therefore the ancestor of all descendant vertebrates, including humans, discovered.
Other Sciences / Archaeology & Fossils
Mar 05, 2012 |
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Researchers revolutionize electron microscope
Researchers at the University of Sheffield have revolutionised the electron microscope by developing a new method which could create the highest resolution images ever seen.
Mar 05, 2012 |
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Solved: The mystery of the nanoscale crop circles
(PhysOrg.com) -- Almost three years ago a team of scientists at the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) was performing an experiment in which layers of gold mere ...
Mar 02, 2012 |
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New picture of atomic nucleus emerges
(PhysOrg.com) -- When most of us think of an atom, we think of tiny electrons whizzing around a stationary, dense nucleus composed of protons and neutrons, collectively known as nucleons. A collaboration between ...
Mar 02, 2012 |
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Emerging from the vortex
Whether a car or a ball, the forces acting on a body moving in a straight line are very different to those acting on one moving in tight curves. This maxim also holds true at microscopic scales. As such, a ...
Feb 17, 2012 |
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Electron microscope
An 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.
For more information about Electron microscope, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
