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
Scientists Create Material More Insulating than the Vacuum
22 hours ago |
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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 ...
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. ...
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.
New research may lead to revolutionary new devices
Nanotechnology / Nanomaterials
Sep 25, 2009 |
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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 ...
'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 ...
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.
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 ...
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 ...
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 ...
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, ...
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.
Researchers create catalysts for use in hydrogen storage materials
Nanotechnology / Nanomaterials
Mar 24, 2009 |
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A team of scientists from Virginia Commonwealth University, the University of Uppsala in Sweden, and the Savannah River National Laboratory have identified that carbon nanostructures can be used as catalysts to store and ...
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 ...
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.
New research identifies faster detection of viruses
Nanotechnology / Bio & Medicine
Feb 17, 2009 |
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A more specific and faster detection of viruses has been identified in new research by Trinity College Dublin's Professor of Physics, Martin Hegner at Trinity College's Centre of Research on Adaptive Nanostructures and Nanodevices ...
