Sentences with phrase «of nanotubes»

Layers of nanotubes in between the fibreglass and steel of the skis spread out incoming energy, dampening the shakes and helping the skiers maintain their speed and stability.

So Shao - Horn and her colleagues decorated the outer surfaces of their nanotubes with two different types of oxygen - containing chemical groups that gave them opposite charges.

The platform builds the fibrils by combining the properties of the nanotube with a synthetic peptide fragment that is placed inside the cylinder.

He got the job and joined the Mesoscopic Physics Group at the ENS in 2001, investigating the use of nanotubes as molecular connectors.

Now scientists will have to probe the electrical properties of these nanotube junctions.

The emitting structures are concluded to be linear chains of carbon atoms, Cn, (n = 10 to 100), pulled out from the open edges of the graphene wall layers of the nanotube by the force of the electric field, in a process that resembles unraveling the sleeve of a sweater.

«But when we applied a thin layer of an ionic liquid on top of the nanotube film we noticed that the change of transparency is amplified 100 times and that the change in transparency occurs in the vicinity of one of the electrodes, so we started studying what causes these drastic changes and how to create transparency in controlled patterns.»

Instead, the device developed by physicist Kaili Jiang of Tsinghua University in Beijing is just a thin film of nanotubes.

Carbon tube walls are good conductors, and along the gap between the ends of the nanotubes the current flows thanks to the tunnel effect, which is a quantum phenomenon where electrons pass through a barrier that is considered insurmountable in classical mechanics.

Now a team from Cambridge University in England has devised a simple technique to increase the density of nanotube forests grown on conductive supports about five times over previous methods.

As the fuel reacts with oxygen above the surface of the nanotube sheet, it releases a charge that make the sheet expand.

Only the diameter of the nanotube matters.»

And researchers had always thought of nanotubes as rolled up graphene sheets.

The resulting cluster of nanotubes, fused to two palladium electrodes, acted as a transistor (Nano Letters, DOI: 10.1021 / nl050405n).

The team threw a dash of nanotubes into a liquid polymer resin and let it harden.

«As you start increasing the concentration, the number of nanotubes in the liquid crystalline phase becomes more abundant than those in the isotropic (disordered) phase, and that's exactly what we needed,» Martí said.

«You can think of each nanotube in the forest as being concentrically coated with different layers of polymer,» says Brian Wardle, professor of aeronautics and astronautics at MIT.

«That situation was very frustrating because I could not get precise knowledge of the one - dimensional characteristics of nanotubes in such films, which is most important.

There are two main types of nanotubes: single - walled nanotubes (SWNTs) and multi-walled nanotubes (MWNTs).

The next application could make for a noisier world: Chinese researchers have found a way to make flexible, paper - thin loudspeakers out of nanotube sheets.

The high degree of control of the method enables production of highly efficient nanotube networks with a very small amount of nanotubes compared to other conventional methods, thereby strongly reducing materials costs.

The key breakthrough was the creation of nanotube porins with a diameter of less than 1 nm, which allowed researchers for the first time to achieve true one - dimensional water confinement.

The lab mounted the small - scale study with the knowledge that the industrial production of nanotubes will inevitably lead to their wider dispersal in the environment.

But with billions of nanotubes on a chip, even a tiny degree of misaligned tubes could cause errors, so that problem remained.

As a result, virtually all of the catalyst particles remained active and quickly produced a forest of nanotubes growing up from a surface.

His team succeeded in producing a porous ultracapacitor material that approached the performance of a nanotube device but potentially at a fraction of the cost.

Sung June Cho, a chemist at the Korean Institute of Energy Research in Taejon, suspected that the storage capabilities of nanotubes could result in part from their ability to conduct electrical charges, which may help hydrogen molecules adhere.

Like his first project in Basel, this project yielded no results, so he changed focus yet again and began to develop techniques for determining the intrinsic resistance of nanotubes.

As the STM tip was moved along the length of the nanotubes, well - defined positions were found where the transport current changes abruptly from a graphitic - like response to one that is highly nonlinear and asymmetrical, including near - perfect rectification.

This tugs at nearby rubidium atoms which have been chilled to a fraction of a degree above absolute zero: a positive charge on the surface of the nanotubes attracts the rubidium atoms» electrons, while the positively charged nucleus is repelled.

Researchers say they may soon be able to repair injured and worn - out cartilage with the help of nanotubes.

Meanwhile, two teams are developing medical applications of nanotubes, taking advantage of the human body's ability to absorb carbon.

Expanding on that work, the Texas group created sheets of nanotubes so thin that an acre of the material weighs just a quarter of a pound.

Inspired by geckos» sticky feet, scientists are developing adhesive tapes — by rooting columns of nanotubes in flexible polymer pieces — that stick many times better than a gecko's foot.

The find, announced on 3 October at a meeting of the American Vacuum Society in Boston, could bring down the production costs of nanotubes and help researchers apply them in a range of new materials and devices.

The rodents showed no signs of ill effects or any deleterious accumulation of the nanotubes in organs.

By preserving the electrons and enhancing the light through the use of nanotube jungles, the team is able to significantly increase the SERS» detection sensitivities in CNTs structures.

Flash melting of lead in the core of a nanotube enables close tracking of nanometer - scale fluid dynamics.

«The nanotube electrolyte solution could be protected from oxygen and water, which would have caused precipitation of the nanotubes,» he said.

They chose a rod shape because they thought that would integrate well with the nanowires and curvatures of nanotubes, wrapping around them to create a robust electrode.The unusually long and very flexible strands of the nanomaterials are crucial to the superior features of the electrodes.

The researchers discovered that 40 milligrams of nanotubes per milliliter gave them a thick gel after mixing at high speed and filtering out whatever large clumps remained.

For this study, the researchers used the technique to pinpoint small concentrations of nanotubes inside rodents.

The rodents were then scanned with the Rice lab's custom - built optical device to detect the faint emission signatures of as little as 100 picograms of nanotubes.

Casiraghi wants to know how the properties of graphene, a form of carbon, differ from the properties of carbon nanotubes, and she wants to figure out how to manipulate the growth of nanotubes to favor the semiconducting kind.

The device captured the internal structure of electronic waves trapped in short sections, just several nanometers long, of nanotubes partially suspended above an atomically flat gold surface.

These results are interpreted in terms of single - electron charging and resonant tunneling through the quantized energy levels of the nanotubes composing the rope.

Because the junctions can adopt many different geometries depending on the radius and chirality of the nanotube, there are many more potential configurations to be modeled, he said.

The study, said George V. Nazin, a professor of physical chemistry, modeled the behavior often observed in carbon nanotube - based electronic devices, where electronic traps are induced by stochastic external charges in the immediate vicinity of the nanotubes.