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Nanoparticle
hideIn nanotechnology, a particle is defined as a small object that behaves as a whole unit in terms of its transport and properties. It is further classified according to size: In terms of diameter, fine particles cover a range between 100 and 2500 nanometers, while ultrafine particles, on the other hand, are sized between 1 and 100 nanometers. Similarly to ultrafine particles, nanoparticles are sized between 1 and 100 nanometers, though the size limitation can be restricted to two dimensions. Nanoparticles may or may not exhibit size-related properties that differ significantly from those observed in fine particles or bulk materials .
Nanoclusters have at least one dimension between 1 and 10 nanometers and a narrow size distribution. Nanopowders are agglomerates of ultrafine particles, nanoparticles, or nanoclusters. Nanometer sized single crystals, or single-domain ultrafine particles, are often referred to as nanocrystals. Nanoparticle research is currently an area of intense scientific research, due to a wide variety of potential applications in biomedical, optical, and electronic fields. The National Nanotechnology Initiative has led to generous public funding for nanoparticle research in the United States.
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News tagged with nanoparticles
New aluminum-water rocket propellant promising for future space missions
Nanotechnology / Nanomaterials
Oct 07, 2009 |
4.5 / 5 (21) |
1
(PhysOrg.com) -- Researchers are developing a new type of rocket propellant made of a frozen mixture of water and "nanoscale aluminum" powder that is more environmentally friendly than conventional propellants ...
Scientists Create Light-Bending Nanoparticles
Nanotechnology / Nanomaterials
Mar 03, 2009 |
4.5 / 5 (20) |
2
(PhysOrg.com) -- Metallic nanoparticles and other structures can manipulate light in ways that are not possible with conventional optical materials. In a recent example of this, Rice University researchers ...
Scientists witness nature's complexity unfold in self-assembling quasicrystals
Nanotechnology / Nanomaterials
Oct 31, 2009 |
4.9 / 5 (17) |
3
(PhysOrg.com) -- Just a few decades ago, scientists believed that all ordered matter consists of self-repeating building blocks -- atoms, ions or molecules. In this view, the ordinary solids of everyday life ...
Running electronics using light
Oct 19, 2009 |
4.3 / 5 (19) |
1
(PhysOrg.com) -- "If you open up almost any electronic gadget, you will see various elements that operating using electric circuitries," Nader Engheta tells PhysOrg.com. "Many of them have different functi ...
Could Maxwell's Demon Exist in Nanoscale Systems?
Jun 24, 2009 |
4.4 / 5 (18) |
30
(PhysOrg.com) -- Maxwell’s demon may be making a comeback. Physicists know that the demon, an imaginary creature that decreases the entropy of a system, cannot exist in macroscopic systems due to the energy ...
Tiny whispering gallery: Sensor can detect a single nanoparticle and take its measurement
Dec 18, 2009 |
4.7 / 5 (16) |
0
(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 ...
Nanofarming technology harvest biofuel oils without harming algae
Nanotechnology / Bio & Medicine
Apr 07, 2009 |
5 / 5 (14) |
3
Algae is widely touted as the next best source for fueling the world's energy needs. But one of the greatest challenges in creating biofuels from algae is that when you extract the oil from the algae, it kills ...
INL, ISU team on nanoparticle production breakthrough
Nanotechnology / Nanomaterials
Oct 19, 2009 |
5 / 5 (14) |
1
Every hour, the sun floods Earth with more energy than the entire world consumes in a year. Yet solar power accounts for less than 0.002 percent of all electricity generated in the United States, primarily ...
Fuel cells get a boost
Nanotechnology / Nanomaterials
Oct 15, 2009 |
3.9 / 5 (17) |
6
Fuel cells, devices that can produce electricity from hydrogen or other fuels without burning them, are considered a promising new way of powering everything from homes and cars to portable devices like cellphones ...
Tumors Feel the Deadly Sting of Nanobees
Nanotechnology / Bio & Medicine
Aug 28, 2009 |
4.8 / 5 (13) |
3
When bees sting, they pump into their victims a peptide toxin called melittin that destroys cell membranes. Now, by encapsulating this extremely potent molecule within a nanoparticle, researchers at the Washington University ...
Scientists build world's first nanofluidic device with complex 3-D surfaces
Nanotechnology / Bio & Medicine
Mar 31, 2009 |
4.8 / 5 (12) |
0
(PhysOrg.com) -- Researchers at the Commerce Department's National Institute of Standards and Technology (NIST) and Cornell University have capitalized on a process for manufacturing integrated circuits at ...
Researchers develop 'wireless' activation of brain circuits
Feb 23, 2009 |
4.7 / 5 (12) |
0
Traditionally, stimulating nerves or brain tissue involves cumbersome wiring and a sharp metal electrode. But a team of researchers at Case Western Reserve University is going "wireless."
Silver Nanoparticles Give Polymer Solar Cells A Boost
Nanotechnology / Nanomaterials
Oct 05, 2009 |
4.3 / 5 (13) |
0
(PhysOrg.com) -- Small bits of metal may play a new role in solar power. Researchers at Ohio State University are experimenting with polymer semiconductors that absorb the sun’s energy and generate electricity. The goal: ...
Sophisticated nano-structures assembled with magnets (Video)
Feb 18, 2009 |
4.9 / 5 (10) |
1
(PhysOrg.com) -- What do Saturn and flowers have in common? As shapes, both possess certain symmetries that are easily recognizable in the natural world. Now, at an extremely small level, researchers from ...
Scorpion venom with nanoparticles slows spread of brain cancer
Nanotechnology / Bio & Medicine
Apr 16, 2009 |
4.6 / 5 (10) |
3
By combining nanoparticles with a scorpion venom compound already being investigated for treating brain cancer, University of Washington researchers found they could cut the spread of cancerous cells by 98 ...
