ScienceDaily Nanotechnology hírei

Tartalom átvétel ScienceDaily: Nanotechnology News
Nanotechnology news. From nanoscience to nanotechnology applications such as nanotechnology in medicine, read the latest news from leading research institutes.
Frissítve: 10 év 1 hét

Scientists identify a spontaneously chain-reacting molecule

h, 12/20/2010 - 17:00
A new paper describes, for the first time, a simple molecule that each time it chemically reacts with a surface prepares a hospitable neighboring site at which the next incoming molecule reacts. Accordingly, these molecules, when simply dosed (blindly) on the surface, spontaneously grow durable "molecular-chains." These molecular chains are the desired prototypes of nano-wires.

How do you cut a nanotube? Lots of compression

v, 12/19/2010 - 14:00
Researchers have described the dynamics behind cutting single-walled carbon nanotubes, cylindrical structures just 1/50,000th the width of a human hair. The tubes are compressed by potent sonic booms, causing them to buckle at certain points at helical, 90-degree angles. The finding could lead to better-quality nanotubes for potential use in automotive, electronics, optics and other fields.

Nanotechnology: Tiny channels carry big information

p, 12/17/2010 - 17:00
Researchers have been able to fabricate nanochannels that are only two nanometers in size, using standard semiconductor manufacturing processes. Already they've discovered that fluid mechanics for passages this small are significantly different not only from bulk-sized channels, but even from channels that are merely 10 nanometers in size.

Physicist developing, improving designer optical materials

p, 12/17/2010 - 02:00
Advancements in fabrication technologies may lead to superlenses and other designer optical materials, according to physicists.

Newly discovered phase helps explain materials' ability to convert waste heat to electricity

cs, 12/16/2010 - 23:00
Scientists have discovered that a class of materials known to convert heat to electricity and vice versa behaves quite unexpectedly at the nanoscale. The discovery -- a new "opposite-direction" phase transition that helps explain the strong thermoelectric response of these materials -- may help scientists identify other useful thermoelectrics, and could further their application in capturing energy lost as heat, for example, in automotive and factory exhaust.

Earthworms absorb discarded copper nanomaterials present in soil

cs, 12/16/2010 - 17:00
The manufacturing of nanomaterials has been steadily on the rise in the medical, industrial, and scientific fields. New research has determined that earthworms could absorb copper nanoparticles present in soil.

Study improves understanding of method for creating multi-metal nanoparticles

cs, 12/16/2010 - 08:00
A new study sheds light on how a technique that is commonly used for making single-metal nanoparticles can be extended to create nanoparticles consisting of two metals -- and that have tunable properties. The study also provides insight into the optical properties of some of these nanoparticles.

New method for making tiny catalysts holds promise for air quality

sze, 12/15/2010 - 23:00
Researchers have demonstrated a simpler method of adding iron to tiny carbon spheres to create catalytic materials that have the potential to remove contaminants from gas or liquid. In one continuous process, it produces tiny, micrometer-sized spheres of porous, spongy carbon embedded with iron nanoparticles -- all in the span of a few seconds.

Nanoscale gene 'ignition switch' may help spot and treat cancer

sze, 12/15/2010 - 20:00
In a proof of principal study in mice, scientists have shown that a set of genetic instructions encased in a nanoparticle can be used as an "ignition switch" to rev up gene activity that aids cancer detection and treatment.

Highly unidirectional 'whispering gallery' microlasers created

k, 12/14/2010 - 02:00
Utilizing a century-old phenomenon discovered in St. Paul's Cathedral, London, scientists have demonstrated, for the first time, highly collimated unidirectional microlasers. The breakthrough elliptical cavity enables a wide range of applications in photonics.

Scientists take molecule's temperature

k, 12/14/2010 - 02:00
A new article details a technique that measures the temperature of molecules set between two gold nanowires and heated either by current applied to the wires or laser light.

Contorting batteries: Charging makes nano-sized electrodes swell, elongate and spiral

h, 12/13/2010 - 17:00
New high-resolution images of electrode wires made from materials used in rechargeable lithium ion batteries shows them contorting as they become charged with electricity. The thin, nano-sized wires writhe and fatten as lithium ions flow in during charging. The work suggests how rechargeable batteries eventually give out and might offer insights for building better batteries.

Microbatteries with nanowire hearts

h, 12/13/2010 - 08:00
Researchers have moved a step closer to creating robust, three-dimensional microbatteries that would charge faster and hold other advantages over conventional lithium-ion batteries. They could power new generations of remote sensors, display screens, smart cards, flexible electronics and biomedical devices.

World's smallest battery: Real-time observation of nanowire anode to help improve lithium batteries

p, 12/10/2010 - 14:00
A benchtop version of the world's smallest battery -- its anode a single nanowire one seven-thousandth the thickness of a human hair -- has been created by a team of researchers.

'First light' of remarkable electron microscope

p, 12/10/2010 - 06:00
Tests of the new high-resolution electron microscope TITAN CUBED 80-300 has been just finished at the Institute of Physics of the Polish Academy of Sciences. The microscope is one of the best facilities of such kind in Europe and allows for the comprehensive examination of materials used in nanotechnology and spintronics. Its regular work will start in January 2011.

Web of international collaboration boosts worldwide nanotechnology research

cs, 12/09/2010 - 06:00
Despite their initial focus on national economic competitiveness, the nanotechnology research initiatives now funded by more than 60 countries have become increasingly collaborative, with nearly a quarter of all papers co-authored by researchers across borders.

Pure nanotube-type growth edges toward the possible

sze, 12/08/2010 - 23:00
New research could ultimately show scientists the way to make batches of nanotubes of a single type. Scientists unveil an elegant formula that defines the energy of a piece of graphene cut at any angle.

Chemical coarsening: How the big get bigger

sze, 12/08/2010 - 17:00
Scientists are studying a process called coarsening, a branch of surface chemistry that examines how objects of different sizes transform into fewer objects with larger average sizes. They are using scanning tunneling microscope technology to see how coarsening happens on the surface of objects and how it can be enhanced.

Nanoparticle gives antimicrobial ability to fight Listeria longer

sze, 12/08/2010 - 14:00
Scientists have developed a nanoparticle that can hold and release an antimicrobial agent as needed for extending the shelf life of foods susceptible to Listeria monocytogenes.

Tiny laser light show illuminates quantum computing

sze, 12/08/2010 - 14:00
A new laser-beam steering system that aims and focuses bursts of light onto single atoms for use in quantum computers has been developed. The new system is somewhat like the laser-light-show projectors used at rock concerts and planetariums. But it's much smaller, faster, atom-scale accurate and aimed at the future of computing, not entertainment.