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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Heating nanoparticles to kill tumor cells

sze, 11/24/2010 - 17:00
Magnetic fluid hyperthermia (MFH) is a promising new cancer treatment that essentially "fries" cells inside tumors. Nanoparticles are heated, cancer cells die with no adverse effects to the surrounding healthy tissue.

World first to provide building blocks for new nano devices

sze, 11/24/2010 - 11:00
Scientists have made a major breakthrough that could help shape the future of nanotechnology, by demonstrating for the first time that 3-D molecular structures can be built on a surface.

Novel fuel cell catalyst lowers need for precious metal

sze, 11/24/2010 - 11:00
A test performed in Copenhagen proves that a new catalyst might show the way to cheap and easy fuel cells.

Ultrathin alternative to silicon for future electronics

k, 11/23/2010 - 17:00
There's good news in the search for the next generation of semiconductors. Researchers have successfully used ultra-thin layers of the semiconductor indium arsenide to create a nanoscale transistor with excellent electronic properties. The technique could be applied to other III-V semiconductors for future high-speed, low-power electronic devices.

Wide range of nano-coatings in a few spray applications

k, 11/23/2010 - 06:00
Easy-to-use nano-coating sprays have been designed with optical, electronic, biological properties, etc to cover surfaces. Scientists have managed to improve and extend their technique of “layer by layer” deposition. This scientific synergy has led to the development of a very wide range of nano-coatings with new and varied applications that will doubtless be of great interest to industry.

Nanoparticles’ effects on plants examined

h, 11/22/2010 - 20:00
Using particles that are 1/100,000 the width of a human hair to deliver drugs to cells or assist plants in fighting off pests may become commonplace in the near future. However, results of studies in animals have also raised concerns about the potential toxicity of nanoparticles.

Chemicals' study pinpoints threat to workers' lungs

p, 11/19/2010 - 20:00
Tiny particles used in a range of everyday products from computers to shampoo can adversely affect the lungs in very different ways, a study has shown. Research suggests that industrial manufacturers using nanoparticles should be aware of the risks that different types of nanoparticles pose to workers who handle them.

Nanoscale probe reveals interactions between surfaces and single molecules

cs, 11/18/2010 - 20:00
Scientists have developed a tool to study nanoscale interactions. The device is a dual scanning tunneling and microwave-frequency probe that is capable of measuring the interactions between single molecules and the surfaces to which the molecules are attached. The information provided by the probe focuses on what the limits of nanoscale electronics will be, rather than targeting devices for production.

A new twist for nanopillar light collectors

cs, 11/18/2010 - 05:00
Researchers have created unique dual-diameter nanopillars -- narrow at the top, broad at the bottom -- that absorb light as well or even better than commercial thin-film solar cells, using far less semiconductor material and without the need for anti-reflective coating.

Imaging tool may aid nanoelectronics by screening tiny tubes

sze, 11/17/2010 - 20:00
Researchers have demonstrated a new imaging tool for rapidly screening structures called single-wall carbon nanotubes, possibly hastening their use in creating a new class of computers and electronics that are faster and consume less power than today's.

Nanoscale light sensor compatible with 'Etch-a-Sketch' nanoelectronic platform

h, 11/15/2010 - 17:00
Researchers have overcome one of nanotechnology's most daunting challenges by creating a nanoscale light sensor that can be combined with near-atomic-size electronic circuitry to produce hybrid optic and electronic devices.

Nanostructured materials repel water droplets before they have a chance to freeze

v, 11/14/2010 - 14:00
Engineers have designed and demonstrated ice-free nanostructured materials that literally repel water droplets before they even have the chance to freeze. The finding could lead to a new way to help keep airplane wings, buildings, powerlines, and even entire highways free and clear of ice during the worst winter weather.

New forms of highly efficient, flexible nanogenerator technology

p, 11/12/2010 - 23:00
Can a heart-implanted micro-robot operate permanently? Can cell phones and tiny robots implanted in the heart operate without having their batteries charged? Such advances may be possible in the near future, thanks to new forms of highly efficient, flexible nanogenerator technology.

New ultra-clean nanowires have great potential in solar cell technology and electronics

p, 11/12/2010 - 17:00
New ultra-clean nanowires will have a central role in the development of new high-efficiency solar cells and electronics on a nanometer scale.

Graphene's strength lies in its defects

p, 11/12/2010 - 05:00
Materials engineers have found that the juncture at which graphene sheets meet does not compromise the material's strength. These so-called grain boundaries are so strong, in fact, that the sheets are nearly as strong as pure graphene. The trick lies in the angles at which the individual sheets are stitched together.

Step by step towards tomorrow’s nanomaterial: Swiss researchers fabricate graphene-like materials using surface chemical route

p, 11/12/2010 - 05:00
Graphene is a promising material for tomorrow's nanoelectronics devices. Precise and upscaleable methods to fabricate graphene and derived materials with desired electronic properties are however still searched after. To overcome the current limitations, Swiss researchers have fabricated graphene-like materials using a surface chemical route and clarified in detail the corresponding reaction pathway.

Out-sniffing bomb-sniffing dogs

cs, 11/11/2010 - 20:00
Researchers have developed a small, portable sensor based on recent advances in nanotechnology that's more sensitive and reliable at detecting explosives than any sniffer dog. In the future it may also be used to detect toxins and other biological threats, such as anthrax, cholera or botulinum, the team reports.

Novel metamaterial vastly improves quality of ultrasound imaging

cs, 11/11/2010 - 08:00
A new copper "metamaterial" can overcome some of the limitations of acoustic microscopes and imagers, including ultrasound imagers. Researchers have designed and built a metamaterial that improves the picture quality of sonography by a factor of 50. The material, composed of copper tubes, resonantly channels evanescent acoustic waves to a detector, capturing more detail than is carried by propagating sound waves.

Cleaner stoves for developing countries, thanks to heat-powered fan design

cs, 11/11/2010 - 06:00
Researchers are helping design a better cook stove for people in developing countries.

Nanopore array allows simultaneous tests in search for new drugs

sze, 11/10/2010 - 23:00
A novel nanopore array structure can be used to monitor the transport kinetics of membrane proteins by fluorescence microscopy. Due to the parallel design of the nanopore chip, a large number of samples can be analyzed simultaneously.