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
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. ...
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 ...
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 ...
Switchable Nanostructures Made with DNA
Nanotechnology / Bio & Medicine
Dec 21, 2009 |
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(PhysOrg.com) -- Scientists at the U.S. Department of Energy’s Brookhaven National Laboratory have found a new way to use a synthetic form of DNA to control the assembly of nanoparticles — this time resulting ...
Water droplets shape graphene nanostructures
Dec 17, 2009 |
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A single-atom-thick sheet of carbon, like those seen in pencil marks -- offers great potential for new types of nanoscale devices, if a good way can be found to mold the material into desired shapes.
Scientists Create Material More Insulating than the Vacuum
Dec 10, 2009 |
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(PhysOrg.com) -- With its complete lack of atoms, a vacuum is often considered to be the best known insulator. For this reason, vacuums are regularly used to reduce heat transfer, such as in the lining of ...
Graphene Used As Floating-Molecular Carpet To Ornament It With 24-Carat Gold 'Snowflakes'
Nanotechnology / Nanomaterials
Oct 12, 2009 |
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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.
'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 ...
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, ...
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.
Capture of nanomagnetic 'fingerprints' a boost for next-generation information storage media
Jan 29, 2009 |
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In the race to develop the next generation of storage and recording media, a major hurdle has been the difficulty of studying the tiny magnetic structures that will serve as their building blocks. Now a team ...
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 ...
The gold standard: researchers use nanoparticles to make 3-D DNA nanotubes
Nanotechnology / Bio & Medicine
Jan 01, 2009 |
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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 ...
One nano-step closer to weighing a single atom
Jul 27, 2009 |
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By studying gold nanoparticles with highly uniform sizes and shapes, scientists now understand how they lose energy, a key step towards producing nanoscale detectors for weighing any single atom.
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 ...
