News tagged with electron microscope
New technology allows scientists to watch cancer cells in action at unprecedented resolution
A photograph of a polar bear in captivity, no matter how sharp the resolution, can never reveal as much about behavior as footage of that polar bear in its natural habitat. The behavior of cells and molecules can prove even ...
Chemistry / Analytical Chemistry
Feb 01, 2012 |
4 / 5 (1) |
0
New zeolite material may solve diesel shortage
World fuel consumption is shifting more and more to diesel at the expense of gasoline. A recently published article in Nature Chemistry by a research team at Stockholm University and the Polytechnic University of Valencia in Spa ...
Feb 01, 2012 |
3 / 5 (1) |
0
Hacking the SEM: Crystal phase detection for nanoscale samples
(PhysOrg.com) -- Custom modifications of equipment are an honored tradition of the research lab. In a recent paper, two materials scientists at the National Institute of Standards and Technology describe how ...
Jan 25, 2012 |
5 / 5 (2) |
0
|
Under the electron microscope -- A 3-D image of an individual protein
(PhysOrg.com) -- When Gang Ren whirls the controls of his cryo-electron microscope, he compares it to fine-tuning the gearshift and brakes of a racing bicycle. But this machine at the U.S. Department of Energy ...
Jan 25, 2012 |
4.9 / 5 (12) |
0
|
A baby crystal is born
Lead sulfide (PbS) forms when an equal number of lead and sulfur atoms exchange electrons and bond together in cubic crystals. Now scientists have determined that a structure comprising 32 lead-sulfur pairs is the smallest ...
Jan 17, 2012 |
5 / 5 (1) |
2
Graphene quantum dots: The next big small thing
A Rice University laboratory has found a way to turn common carbon fiber into graphene quantum dots, tiny specks of matter with properties expected to prove useful in electronic, optical and biomedical applications.
Jan 12, 2012 |
5 / 5 (6) |
0
|
A breakthrough in superlens development: Cheap, simple lens to let us see a single virus
A superlens would let you see a virus in a drop of blood and open the door to better and cheaper electronics. It might, says Durdu Guney, make ultra-high-resolution microscopes as commonplace as cameras in ...
Jan 09, 2012 |
4.8 / 5 (28) |
4
|
Researchers measure nanometer scale temperature
Illinois researchers have developed a new kind of electro-thermal nanoprobe that can independently control voltage and temperature at a nanometer-scale point contact. It can also measure the temperature-dependent ...
Dec 19, 2011 |
5 / 5 (2) |
0
|
UCF nanotechnology may speed up drug testing
Testing the effectiveness of new pharmaceuticals may get faster thanks to a new technique incorporating quantum dots developed at the University of Central Florida.
Nanotechnology / Bio & Medicine
Dec 19, 2011 |
not rated yet |
0
|
Graphene earns its stripes: New nanoscale electronic state discovered on graphene sheets
Researchers from the London Centre for Nanotechnology (LCN) have discovered electronic stripes, called 'charge density waves', on the surface of the graphene sheets that make up a graphitic superconductor. ...
Nanotechnology / Nanomaterials
Nov 29, 2011 |
5 / 5 (8) |
5
|
First elucidation of cause of long-term stability deterioration in solid oxide fuel cells
NIMS and the University of Queensland Centre for Microscopy and Microanalysis, the Dalian Polytechnic University, and the Dalian Institute of Chemical Physics, Chinese Academy of Science, clarified for the ...
Nov 24, 2011 |
5 / 5 (2) |
0
World's smallest four-wheel-drive is a billionth of a meter (Update)
(PhysOrg.com) -- Reduced to the max: the emission-free, noiseless 4-wheel drive car, jointly developed by Empa researchers and their Dutch colleagues, represents lightweight construction at its most extreme. ...
Nov 09, 2011 |
4.8 / 5 (6) |
2
|
Are electron tweezers possible? Apparently so
(PhysOrg.com) -- Not to pick up electrons, but tweezers made of electrons. A recent paper by researchers from the National Institute of Standards and Technology (NIST) and the University of Virginia (UVA) demonstrates that ...
Nov 09, 2011 |
5 / 5 (4) |
2
|
Nanoparticles and their size may not be big issues
If you've ever eaten from silverware or worn copper jewelry, you've been in a perfect storm in which nanoparticles were dropped into the environment, say scientists at the University of Oregon.
Nanotechnology / Bio & Medicine
Oct 24, 2011 |
4 / 5 (4) |
1
|
Nanobelts support manipulation of light
(PhysOrg.com) -- They look like 2-by-4s, but the materials being created in a Rice University lab are more suited to construction with light.
Oct 14, 2011 |
5 / 5 (2) |
1
|
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.
