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.
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New transistors: An alternative to silicon and better than graphene

h, 01/31/2011 - 17:00
Smaller and more energy-efficient electronic chips could be made using molybdenite. This material has distinct advantages over traditional silicon or graphene for use in electronics applications.

Nanosilver: A new name -- well-known effects

h, 01/31/2011 - 06:00
Nanosilver is not a new discovery by nanotechnologists -- it has been used in various products for over a hundred years, as is shown by a new study. The antimicrobial effects of minute silver particles, which were then known as "colloidal silver," were known from the earliest days of its use.

Atomically thin ‘switch’ makes for smarter ICT devices in the future

h, 01/31/2011 - 06:00
Researchers have developed a new graphene transistor with 1000 times higher on/off switching ratio.

GRIN plasmonics: A practical path to superfast computing, ultrapowerful optical microscopy and invisibility carpet-cloaking devices

v, 01/30/2011 - 23:00
Researchers have carried out the first experimental demonstration of GRIN plasmonics, a hybrid technology that opens the door to a wide range of exotic applications in optics, including superfast photonic computers, ultra-powerful optical microscopes and "invisibility" carpet-cloaking devices.

Touchscreens made of carbon

p, 01/28/2011 - 17:00
Touchscreens are in – although the technology still has its price. The little screens contain rare and expensive elements. This is the reason why researchers are coming up with an alternative display made of low-priced renewable raw materials available all over the world. Researchers have now made prototype touchscreens that contain carbon nanotubes.

A mix of tiny gold and viral particles, and the DNA ties that bind them

p, 01/28/2011 - 14:00
Scientists have created a diamond-like lattice composed of gold nanoparticles and viral particles, woven together and held in place by strands of DNA. The structure -- a distinctive mix of hard, metallic nanoparticles and organic viral pieces known as capsids, linked by the very stuff of life, DNA -- marks a remarkable step in scientists' ability to combine an assortment of materials to create infinitesimal devices.

Nanowires exhibit giant piezoelectricity

p, 01/28/2011 - 11:00
Researchers have reported that piezoelectricity in GaN and ZnO nanowires is enhanced by as much as two orders of magnitude as the diameter of the nanowires decrease.

Chemists turn gold to purple -- on purpose: Color change confirms a new way to harvest energy from sunlight

cs, 01/27/2011 - 08:00
Chemists suspected that a common protein could potentially react with sunlight and harvest its energy -- similar to what chlorophyll does during photosynthesis.

Nanotech milling produces dramatic increase in thermoelectric performance of bulk semiconductor

cs, 01/27/2011 - 05:00
Researchers report achieving thermoelectric performance gains in a bulk semiconductor material, which could pave the way for harvesting power from a range of heat sources -- from the sun to car exhaust systems.

Growth-factor-containing nanoparticles accelerate healing of chronic wounds

sze, 01/26/2011 - 20:00
Researchers have developed a novel system for delivery of growth factors to chronic wounds such as pressure sores and diabetic foot ulcers. The team fabricated nanospheres containing keratinocyte growth factor fused with elastin-like peptides. When suspended in a fibrin gel, the nanoparticles improved the healing of deep skin wounds in diabetic mice.

Armchair nanoribbons made into spintronic device

sze, 01/26/2011 - 17:00
A new advance may soon revolutionize handheld electronics, flat-panel displays, touch panels, electronic ink, and solar cells. Physicists in Iran have created a spintronic device based on "armchair" graphene nanoribbons that could one day replace more expensive indium tin oxide.

Van-der-Waals force up close: Physicists take new look at the atom

sze, 01/26/2011 - 11:00
Physicists have discovered a new way to measure how single atoms interact with a surface. Their findings help develop nanotechnology and test new theories about the internal structure of atoms.

No longer just a spectator, silicon oxide gets into the electronics action on computer chips

sze, 01/26/2011 - 08:00
Scientists are documenting that one fundamental component of computer chips, long regarded as a passive bystander, can actually be made to act like a switch. That potentially allows it to take part in the electronic processes that power cell phones, iPads and other products. In a new report, the scientists document the multiple ways in which silicon dioxide, long regarded simply as an electric insulator, gets involved in the action.

New treatment option to reduce metastasis in ovarian cancer

sze, 01/26/2011 - 06:00
A new study could provide the foundation for a new ovarian cancer treatment option -- one that would use an outside-the-body filtration device to remove a large portion of the free-floating cancer cells that often create secondary tumors.

'Breast on a chip': Researchers create 'engineered organ' model for breast cancer research

sze, 01/26/2011 - 02:00
Researchers have reproduced portions of the female breast in a tiny slide-sized model dubbed "breast on-a-chip" that will be used to test nanomedical approaches for the detection and treatment of breast cancer. The model mimics the branching mammary duct system, where most breast cancers begin, and will serve as an "engineered organ" to study the use of nanoparticles to detect and target tumor cells within the ducts.

New materials may bring advanced optical technologies, cloaking

k, 01/25/2011 - 23:00
Researchers are developing a new class of "plasmonic metamaterials" as potential building blocks for advanced optical technologies, including ultrapowerful microscopes and computers, improved solar cells, and a possible invisibility cloak.

Nanoscale transistors used to study single-molecule interactions

k, 01/25/2011 - 11:00
Researchers have figured out a way to study single-molecule interactions on very short time scales using nanoscale transistors. Researchers show how, for the first time, transistors can be used to detect the binding of the two halves of the DNA double helix with the DNA tethered to the transistor sensor.

Nanoworld in color: Tiny lens arrays can record or project sharp images

h, 01/24/2011 - 23:00
Researchers in Germany have developed microscopically small nanostructured arrays of lenses that can record or project amazingly sharp images in brilliant colors.

Curved carbon for electronics of the future

h, 01/24/2011 - 17:00
A new scientific discovery could have profound implications for nanoelectronic components. Researchers have shown how electrons on thin tubes of graphite exhibit a unique interaction between their motion and their attached magnetic field -- the so-called spin. The discovery paves the way for unprecedented control over the spin of electrons and may have a big impact on applications for spin-based nanoelectronics.

Real-world graphene devices may have a bumpy ride

h, 01/24/2011 - 08:00
New measurements by researchers may affect the design of devices that rely on the high mobility of electrons in graphene -- they show that layering graphene on a substrate transforms its bustling speedway into steep hills and valleys that make it harder for electrons to get around.