Related topics: carbon nanotube , nanotechnology
Nanometre
hideA nanometre (American spelling: nanometer; symbol nm) (Greek: νάνος, nanos, "dwarf"; μέτρον, metrοn, "unit of measurement") is a unit of length in the metric system, equal to one billionth of a metre (i.e., 10-9 m or one millionth of a millimetre).
It is one of the more often used units for very small lengths, and equals ten Ångström, an internationally recognized non-SI unit of length. It is often associated with the field of nanotechnology and the wavelength of light. Formerly, millimicron (symbol mµ) was used for the nanometre. The symbol µµ has also been used .
It is also the most common unit used to describe the manufacturing technology used in the semiconductor industry. It is the most common unit to describe the wavelength of light, with visible light falling in the region of 400–700 nm. The data in compact discs is stored as indentations (known as pits) that are approximately 100 nm deep by 500 nm wide. Reading an optical disk requires a laser with a wavelength 4 times the pit depth -- a CD requires a 780 nm wavelength (near infrared) laser, while the shallower pits of a DVD requires a shorter 650 nm wavelength (red) laser, and the even shallower pits of a Blu-ray Disc require a shorter 405 nm wavelength (blue) laser.
For more information about Nanometre, read the full article at
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News tagged with nanometers
Digital Quantum Battery Could Boost Energy Density Tenfold
Dec 22, 2009 |
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(PhysOrg.com) -- Physicists theorize that quantum phenomena could provide a major boost to batteries, with the potential to increase energy density up to 10 times that of lithium ion batteries. According to ...
The next medical frontier: nano-surgery
Nanotechnology / Bio & Medicine
Dec 21, 2009 |
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(PhysOrg.com) -- Engineering professor's nanorobot could be performing non-invasive surgical procedures on patients with tumors within the next decade.
Tiny whispering gallery: Sensor can detect a single nanoparticle and take its measurement
Dec 18, 2009 |
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(PhysOrg.com) -- Nanotechnology has already made it to the shelves of your local pharmacy and grocery: nanoparticles are found in anti-odor socks, makeup, makeup remover, sunscreen, anti-graffiti paint, home ...
Nanotech treatment gets boost with GSK licensing agreement
Nanotechnology / Bio & Medicine
Dec 17, 2009 |
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(PhysOrg.com) -- GlaxoSmithKline and Ann Arbor-based NanoBio Corporation announced today that they have signed an exclusive over-the-counter licensing agreement for NanoBio’s unique nanoemulsion treatment for cold sores in ...
New silicon-germanium nanowires could lead to smaller, more powerful electronic devices
Dec 09, 2009 |
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(PhysOrg.com) -- Microchip manufacturers have long faced challenges miniaturizing transistors, the key active components in nearly every modern electronic device, which are used to amplify or switch electronic signals.
First metallic nanoparticles resistant to extreme heat
Nanotechnology / Nanomaterials
Nov 30, 2009 |
4.8 / 5 (5) |
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A University of Pittsburgh team overcame a major hurdle plaguing the development of nanomaterials such as those that could lead to more efficient catalysts used to produce hydrogen and render car exhaust less toxic. The researchers ...
Small optical force can budge nanoscale objects
Nov 17, 2009 |
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(PhysOrg.com) -- Engineering researchers have used a very tiny beam of light with as little as 1 milliwatt of power to move a silicon structure up to 12 nanometers.
New nanocrystalline diamond probes overcome wear
Nov 10, 2009 |
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Researchers at the McCormick School of Engineering and Applied Science at Northwestern University have developed, characterized, and modeled a new kind of probe used in atomic force microscopy (AFM), which images, measures, ...
Findings show nanomedicine promising for treating spinal cord injuries
Nanotechnology / Bio & Medicine
Nov 08, 2009 |
4.5 / 5 (4) |
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(PhysOrg.com) -- Researchers at Purdue University have discovered a new approach for repairing damaged nerve fibers in spinal cord injuries using nano-spheres that could be injected into the blood shortly ...
Nanotechnology: A risky frontier?
Nanotechnology / Nanomaterials
Nov 05, 2009 |
4.8 / 5 (5) |
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Inside a cramped back room at Rushford Hypersonic, a start-up headquartered in southeastern Minnesota, sits a cube-like machine that throws a mean atomic fastball. At the push of a button, the reactor hurls atoms toward a ...
Pinning Down Superconductivity to a Single Layer
Oct 29, 2009 |
4.9 / 5 (16) |
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(PhysOrg.com) -- Using precision techniques for making superconducting thin films layer-by-layer, physicists at the U.S. Department of Energy's Brookhaven National Laboratory have identified a single layer ...
Researchers create nanoparticle coating to prevent freezing rain buildup (w/ Video)
Oct 29, 2009 |
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(PhysOrg.com) -- Preventing the havoc wrought when freezing rain collects on roads, power lines, and aircrafts could be only a few nanometers away. A University of Pittsburgh-led team demonstrates in the Nov. 3 edition of ...
Carbon nanotubes may cheaply harvest sunlight
Nanotechnology / Nanomaterials
Oct 19, 2009 |
3.4 / 5 (9) |
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(PhysOrg.com) -- A new alternative energy technology relies on the element most associated with climate change: carbon.
Nanosatellites expected to benefit from advanced propulsion technology
Nanotechnology / Nanomaterials
Oct 19, 2009 |
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A University of Michigan professor is developing an electric rocket thruster, NanoFET, that uses nanoparticle electric propulsion and enables spacecraft to travel faster and with less propellant than previous ...
Tiny technology may yield major finds -- and possible perils
Nanotechnology / Bio & Medicine
Oct 13, 2009 |
5 / 5 (7) |
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Imagine a particle so small it would take a million of them to stretch across the period at the end of this sentence. Imagine such particles could help catch cancer cells floating in your bloodstream before they could metastasize ...
