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 17 hét

DNA engine observed in real-time traveling along base pair track

h, 02/07/2011 - 23:00
In a complex feat of nanoengineering, a team of scientists has succeeded in creating a programmable molecular transport system, the workings of which can be observed in real time. The results open the door to the development of advanced drug delivery methods and molecular manufacturing systems.

Low-cost, nanometer-sized drug holds promise for treatment of chronic diabetes and burn wounds

h, 02/07/2011 - 23:00
A low cost, nanometer-sized drug to treat chronic wounds, such as diabetic foot ulcers or burns, has been developed by a group of scientists from Israel, the U.S. and Japan.

Engineers grow nanolasers on silicon, pave way for on-chip photonics

h, 02/07/2011 - 23:00
Engineers have found a way to grow nanolasers directly onto a silicon surface, an achievement that could lead to a new class of faster, more efficient microprocessors, as well as to powerful biochemical sensors that use optoelectronic chips.

Seeing the light: Scientists bring plasmonic nanofields into focus

h, 02/07/2011 - 14:00
Scientists have engineered an innovative imaging technique to visualize plasmonic fields with nanoscale resolution. This technique, which harnesses light within a bowtie-shaped structure, could be used to measure the performance of plasmonic devices.

‘Cornell dots’ that light up cancer cells go into clinical trials

h, 02/07/2011 - 11:00
"Cornell Dots" -- brightly glowing nanoparticles -- may soon be used to light up cancer cells to aid in diagnosing and treating cancer. The U.S. Food and Drug Administration (FDA) has approved the first clinical trial in humans of the new technology. It is the first time the FDA has approved using an inorganic material in the same fashion as a drug in humans.

Taming carbon nanotubes

h, 02/07/2011 - 06:00
Carbon nanotubes have many attractive properties, and their structure and areas of application can be compared with those of graphene, the material for whose discovery the most recent Nobel Prize was awarded. In order to be able to exploit these properties, however, it is necessary to have full control of the manufacturing process. Scientists are now closing in on the answer.

A loose grip provides better chemotherapy

szo, 02/05/2011 - 23:00
Researchers have found that cancer patients may get a bigger bang and fewer side effects with a new take on a drug delivery system. By using noncovalent bonds to link light-activated anti-cancer drugs to coated gold nanoparticles, they were able to activate treatment in two hours instead of two days. The scientists expect the targeted delivery system will cut dosage by a factor of 10 or more.

Nanoscale micorscopy and AFM positioning: Shining light on a needle in a haystack

szo, 02/05/2011 - 23:00
Researchers report a neat solution to the "needle in a haystack" problem of nanoscale microscopy, but it's more like the difference between finding the coffee table in a darkened room either by walking around until you fall over it, or using a flashlight. Researchers found tiny assemblies of biomolecules for subsequent detailed imaging by combining precision laser optics with atomic force microscopy.

New twist on the electron beam

szo, 02/05/2011 - 17:00
Researchers have found a novel, and potentially widely applicable, method to expand the capabilities of conventional transmission electron microscopes by adding a new twist to their electron beams.

Quantum quirk: Scientists pack atoms together to prevent collisions in atomic clock

p, 02/04/2011 - 20:00
In a paradox typical of the quantum world, scientists have eliminated collisions between atoms in an atomic clock by packing the atoms closer together. The surprising discovery can boost the performance of experimental atomic clocks made of thousands or tens of thousands of neutral atoms trapped by intersecting laser beams.

Same rules apply to some experimental systems regardless of scale

p, 02/04/2011 - 08:00
New experiments show that common scientific rules can apply to significantly different phenomena operating on vastly different scales. The results raise the possibility of making discoveries pertaining to phenomena that would be too large or impractical to recreate in the laboratory.

High-efficiency photovoltaic cells developed

p, 02/04/2011 - 06:00
Scientists have produced silicon photovoltaic cells with a conversion efficiency of 20.5%, the highest level achieved in Spain using this material.

Tuning graphene film so it sheds water

cs, 02/03/2011 - 02:00
Windshields that shed water so effectively that they don't need wipers. Ship hulls so slippery that they glide through the water more efficiently than ordinary hulls. These are some of the potential applications for graphene, one of the hottest new materials in the field of nanotechnology.

New nanoparticles make blood clots visible

sze, 02/02/2011 - 23:00
For almost two decades, cardiologists have searched for ways to see dangerous blood clots before they cause heart attacks. Now, researchers report that they have designed nanoparticles that find clots and make them visible to a new kind of X-ray technology.

Synthetic materials that behave like mollusk shells

sze, 02/02/2011 - 06:00
Researchers report the identification of specific characteristics of the material microstructure of nacre, the iridescent material lining many mollusk shells, that enable its outstanding performance. By performing detailed fracture experiments within an atomic force microscope, the group was able to directly visualize and quantify the way the tablets slid relative to each other as the material is deformed.

Early tests find nanoshell therapy effective against brain cancer

sze, 02/02/2011 - 02:00
Researchers have successfully destroyed tumors of human brain cancer cells in the first animal tests of a minimally invasive treatment that zaps glioma tumors with heat. The researchers reported that four of seven mice that received the new treatment for glioma tumors had no signs of cancer more than three months after treatment.

Scientists model tiny rotors, key to future nanomachines

k, 02/01/2011 - 20:00
Researchers have created a molecular midway where atoms dip, dive and soar. Through molecular dynamics simulations, they have now defined the ground rules for the rotor motion of molecules attached to a gold surface.

Nanotechnology: Detecting lethal diseases with rust and sand

k, 02/01/2011 - 11:00
The next big thing in medical diagnostics could be minutes particles of rust, iron oxide, coated with the material from which sand is formed, silicon dioxide. These magnetic nanoparticles, a mere 29 to 230 nanometers across, can be used to trap antibodies to the virus that causes cervical cancer and to the bacteria that causes potentially lethal diarrhea.

Single molecule controlled at room temperature: Tiny magnetic switch discovered

k, 02/01/2011 - 08:00
Chemists have succeeded for the first time in directly controlling the magnetic state of a single molecule at room temperature. The switchable molecule could be used both in the construction of tiny electromagnetic storage units and in the medical imaging.

How Safe Is Nano? Nanotoxicology: An interdisciplinary challenge

k, 02/01/2011 - 06:00
The rapid development of nanotechnology has increased fears about the health risks of nano-objects. Are these fears justified? Do we need a new discipline, nanotoxicology, to evaluate the risks?