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 nanostructure
Scientists Build Nanostructures out of Single DNA Strands
Nanotechnology / Bio & Medicine
Sep 08, 2009 |
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(PhysOrg.com) -- With its unique double-helical structure, DNA has the ability to be used as a programmable building material to construct designer nanoscale architectures. Complex DNA architectures could ...
Atom Pinhole Camera Acts as a Shrinking Copy Machine
Jun 01, 2009 |
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(PhysOrg.com) -- In 1983, Richard Feynman proposed the idea of a machine that could create smaller scale replicas of itself. Today, such a system is still a challenge, but a machine that can produce nanometer-sized ...
Scientists solve decade-long mystery of nanopillar formations
Oct 22, 2009 |
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Scientists at the California Institute of Technology have uncovered the physical mechanism by which arrays of nanoscale pillars can be grown on polymer films with very high precision, in potentially limitless ...
Scientists bend nanowires into 2-D and 3-D structures
Oct 21, 2009 |
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(PhysOrg.com) -- Taking nanomaterials to a new level of structural complexity, scientists have determined how to introduce kinks into arrow-straight nanowires, transforming them into zigzagging two- and three-dimensional ...
Salt and Paper Battery May One Day Replace Lithium Batteries
Sep 15, 2009 |
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(PhysOrg.com) -- Salt and paper battery can be used in many low-power devices, such as medical implants, RFID tags, wireless sensors and smart cards. This battery uses a thin-film which makes it an attractive ...
IBM Scientists Effectively Eliminate Wear at the Nanoscale
Sep 07, 2009 |
4.4 / 5 (14) |
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(PhysOrg.com) -- IBM scientists have demonstrated a promising and practical method that effectively eliminates the mechanical wear in the nanometer-sharp tips used in scanning probe-based techniques. This discovery can potentially ...
Iridescence found in 40-million-year-old fossil bird feather
Other Sciences / Archaeology & Fossils
Aug 26, 2009 |
4.5 / 5 (8) |
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Known for their wide variety of vibrant plumage, birds have evolved various chemical and physical mechanisms to produce these beautiful colors over millions of years. A team of paleontologists and ornithologists ...
Scientists Use DNA Scaffolding To Build Tiny Circuit Boards
Aug 18, 2009 |
4.9 / 5 (8) |
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(PhysOrg.com) -- Today, scientists at IBM Research and the California Institute of Technology announced a scientific advancement that could be a major breakthrough in enabling the semiconductor industry to ...
Going platinum: New catalyst could boost cleaner fuel use
Nanotechnology / Nanomaterials
May 14, 2009 |
4.1 / 5 (23) |
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(PhysOrg.com) -- Material scientists at Washington University in St. Louis have developed a technique for a bimetallic fuel cell catalyst that is efficient, robust and two to five times more effective than ...
Ancient diatoms lead to new technology for solar energy
Nanotechnology / Nanomaterials
Apr 08, 2009 |
4.5 / 5 (13) |
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Engineers at Oregon State University have discovered a way to use an ancient life form to create one of the newest technologies for solar energy, in systems that may be surprisingly simple to build compared to existing silicon-based ...
One Can Act Without Group Support; Even in the Bacterial World
Dec 08, 2009 |
4.7 / 5 (3) |
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(PhysOrg.com) -- A single bacterium can act alone, performing the same kinds of actions that a group normally does. The behavior of that bacterium can be manipulated at the cellular level. That’s the intriguing ...
Imaging a catalyst one atom at a time
Nanotechnology / Nanomaterials
Nov 09, 2009 |
5 / 5 (3) |
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(PhysOrg.com) -- The catalytic processes that facilitate the production of many chemicals and fuels could become much more environmentally friendly thanks to a breakthrough achieved by researchers from Lehigh ...
Lasers can lengthen quantum bit memory by 1,000 times
Jun 24, 2009 |
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Physicists have found a way to drastically prolong the shelf life of quantum bits, the 0s and 1s of quantum computers.
Regular Light Bulbs Made Super-Efficient with Ultra-Fast Laser
May 29, 2009 |
4.4 / 5 (40) |
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(PhysOrg.com) -- An ultra-powerful laser can turn regular incandescent light bulbs into power-sippers, say optics researchers at the University of Rochester. The process could make a light as bright as a 100-watt ...
DNA molecules can detect pathogens, deliver drugs
Nanotechnology / Bio & Medicine
May 20, 2009 |
5 / 5 (1) |
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(PhysOrg.com) -- First, Cornell researchers created DNA "bar codes" -- strands of the genetic material that quickly identify the presence of different molecules by fluorescing. Now, they have created new DNA ...
