Nanostructure
hideA nanostructure is an object of intermediate size between molecular and microscopic (micrometer-sized) structures.
In describing nanostructures it is necessary to differentiate between the number of dimensions on the nanoscale. Nanotextured surfaces have one dimension on the nanoscale, i.e., only the thickness of the surface of an object is between 0.1 and 100 nm. Nanotubes have two dimensions on the nanoscale, i.e., the diameter of the tube is between 0.1 and 100 nm; its length could be much greater. Finally, spherical nanoparticles have three dimensions on the nanoscale, i.e., the particle is between 0.1 and 100 nm in each spatial dimension. The terms nanoparticles and ultrafine particles (UFP) often are used synonymously although UFP can reach into the micrometre range.
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News tagged with nanostructures
Physicists put a new spin on electrons
Apr 15, 2009 |
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In the first demonstration of its kind, researchers at the University of British Columbia have controlled the spin of electrons using a ballistic technique--bouncing electrons through a microscopic channel of precisely constructed, ...
Engineering Carbon for Impressive Hydrogen Storage
Nanotechnology / Nanomaterials
May 22, 2009 |
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(PhysOrg.com) -- University of Missouri researchers recently showed how carbon nanostructures can be engineered to become excellent media for hydrogen storage, work that may be important for the advancement of hydrogen-energy ...
Nanocups brim with potential: Light-bending metamaterial could lead to superlenses, invisibility cloaks
Mar 13, 2009 |
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Researchers at Rice University have created a metamaterial that could light the way toward high-powered optics, ultra-efficient solar cells and even cloaking devices.
Nanoimaging in 3-D
Dec 01, 2009 |
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(PhysOrg.com) -- As technology shrinks ever smaller, interest in objects and devices on the nanoscale becomes more apparent. However, visualizing these objects in three dimensions comes with special challenges. ...
Nanotech Batteries for a New Energy Future
Nanotechnology / Nanomaterials
Mar 19, 2009 |
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(PhysOrg.com) -- In order to save money and energy, many people are purchasing hybrid electric cars or installing solar panels on the roofs of their homes. But both have a problem -- the technology to store ...
The gold standard: researchers use nanoparticles to make 3-D DNA nanotubes
Nanotechnology / Bio & Medicine
Jan 01, 2009 |
5 / 5 (8) |
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Arizona State University researchers Hao Yan and Yan Liu imagine and assemble intricate structures on a scale almost unfathomably small. Their medium is the double-helical DNA molecule, a versatile building ...
New 'Nanowelding' Technique for Building Electronic Nanostructures
Dec 29, 2008 |
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(PhysOrg.com) -- Scientists have discovered a way to link nanowires and other nanoobjects into complex nanostructures and circuits by fusing them together with tiny amounts of solder. The researchers, from ...
Targeted nanospheres find, penetrate, then fuel burning of melanoma
Nanotechnology / Bio & Medicine
Feb 02, 2009 |
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Hollow gold nanospheres equipped with a targeting peptide find melanoma cells, penetrate them deeply, and then cook the tumor when bathed with near-infrared light, a research team led by scientists at The University of Texas ...
'NanoPen' may write new chapter in nanotechnology manufacturing
Nanotechnology / Bio & Medicine
Sep 02, 2009 |
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Researchers in California are reporting development of a so-called "NanoPen" that could provide a quick, convenient way of laying down patterns of nanoparticles — from wires to circuits — for making futuristic ...
New research may lead to revolutionary new devices
Nanotechnology / Nanomaterials
Sep 25, 2009 |
4.3 / 5 (7) |
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Dr. Jiwoong Park of Cornell University, who receives funding for basic research from the Air Force Office of Scientific Research (AFOSR), is investigating carbon nanostructures that may some day be used in ...
Graphene Used As Floating-Molecular Carpet To Ornament It With 24-Carat Gold 'Snowflakes'
Nanotechnology / Nanomaterials
Oct 12, 2009 |
4.2 / 5 (6) |
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(PhysOrg.com) -- In an effort to make graphene more useful in electronics applications, Kansas State University engineers made a golden discovery -- gold "snowflakes" on graphene.
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.
Light-speed nanotech: Controlling the nature of graphene
Jan 21, 2009 |
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Researchers at Rensselaer Polytechnic Institute have discovered a new method for controlling the nature of graphene, bringing academia and industry potentially one step closer to realizing the mass production ...
Scientists demonstrate effect of confining dielectrics on semiconductor nanowire conductivity
May 05, 2009 |
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Researchers at the Harvard School of Engineering and Applied Sciences (SEAS), in collaboration with researchers from Worcester Polytechnic Institute (WPI), have demonstrated, for the first time, that the activation energy ...
Coupling of Single Quantum Dots to Smooth Metal Films
Jul 20, 2009 |
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Scientists at Argonne National Laboratory's CNM Nanophotonics Group have measured how light emission from individual colloidal semiconductor nanocrystals, or quantum dots, is modified when in proximity to ...
